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Service Manual
Impedance Audiometer AT235
Part number 80650106
Valid from instrument no. 750659
Contents
Contents ......................................................................................................................................................................1
General Technical Specifications .............................................................................................................................3
Impedance Measuring System...........................................................................................................................3
Reflex and Audiometer Functions ......................................................................................................................3
Table 1: Frequencies and intensity ranges ........................................................................................................4
Specification of input/output connections...........................................................................................................5
Calibration properties .........................................................................................................................................6
Coupler types used by calibration ......................................................................................................................7
Output voltages (regulated):...............................................................................................................................7
General about specifications ..............................................................................................................................8
Calibration Procedure ................................................................................................................................................9
General Information............................................................................................................................................9
Service, Adjustment and Repair...............................................................................................................9
Error in stored data (EEPROM Error) ......................................................................................................9
Equipment for the Calibration.................................................................................................................10
Air System ........................................................................................................................................................10
Hardware Calibration ...............................................................................................................................................11
Attenuator Calibration.......................................................................................................................................11
Fixed Attenuator Check ....................................................................................................................................12
Software Calibration.................................................................................................................................................13
Probe Calibration..............................................................................................................................................13
Pressure Calibration...............................................................................................................................14
Probe Tone Calibration ..........................................................................................................................15
Compliance Calibration ..........................................................................................................................16
Probe Real Mode ...................................................................................................................................17
Ipsi Calibration........................................................................................................................................17
Headset Calibration ..........................................................................................................................................19
The information window .........................................................................................................................19
Factory Calibration Values ...............................................................................................................................20
Insert Factory Calibration Values ...........................................................................................................20
Disassembly ..............................................................................................................................................................21
Open Cabinet ...................................................................................................................................................21
Pump Tube Connections..................................................................................................................................21
Pump Tube Replacement.................................................................................................................................22
Electrical Assembling Instrument .....................................................................................................................23
Rear Panel Connections ........................................................................................................................23
Transducer Wire and Tube Connections .........................................................................................................24
Transducer Spare parts....................................................................................................................................25
Printer Connections ..........................................................................................................................................26
Schematics ................................................................................................................................................................27
Analog Block Diagram ......................................................................................................................................27
Keyboard Diagram............................................................................................................................................28
Components Index and Values ..............................................................................................................29
Keyboard Part List..................................................................................................................................30
Main board Diagram .........................................................................................................................................31
Components Index .................................................................................................................................38
Main board Part List ...............................................................................................................................39
Transducer Board Diagram ..............................................................................................................................45
Components Index .................................................................................................................................46
Transducer Part List...............................................................................................................................47
AT235 Service manual page 1
Appendix A Description of Serial Interface .............................................................................................................1
General Specification .........................................................................................................................................1
Installing the USB Driver on the PC ...................................................................................................................1
Communication...................................................................................................................................................3
Audiological Information .....................................................................................................................................5
Impedance Audiometry ......................................................................................................................................5
EEPROM Commands.........................................................................................................................................9
Information..........................................................................................................................................................9
Remote Commands..........................................................................................................................................10
Status................................................................................................................................................................11
IPSI Calibration.................................................................................................................................................11
Setup Items ......................................................................................................................................................12
Online Communication .....................................................................................................................................14
Cochlear Implant ..............................................................................................................................................17
Communication in Windows .............................................................................................................................18
Appendix B User Setup..............................................................................................................................................1
Set-up Navigation ...............................................................................................................................................1
User Setup..........................................................................................................................................................2
Setting up Reflex Tests ......................................................................................................................................3
Common Setup.................................................................................................................................................11
Clinic Setup ......................................................................................................................................................13
Appendix C Advanced User Setup ...........................................................................................................................1
Advanced User Setup ........................................................................................................................................1
Advanced Reflex User Setup .............................................................................................................................3
Advanced Audiometry User Setup .....................................................................................................................5
Letter Printout Error (Internal printer) .................................................................................................................8
Storing/Restoring the Setup ...............................................................................................................................8
Appendix U - Update News........................................................................................................................................1
AT235 Service manual page 2
General Technical Specifications
Medical CE-mark:
Standards:
Power, UPS400:
Operation environment:
The CE-mark indicates that Interacoustics A/S meets the requirements of Annex II of the Medical
Device Directive 93/42/EEC.
Approval of the quality system is made by TÜV – identification no. 0123.
EN 60601-1, Class I, Type B
Safety:
EN 60601-1-2
EMC:
EN 61027/ANSI S3.39, Type 2
Impedance:
EN 60645-1/ANSI S3.6 , Type 4 Tone audiometer
Audiometer:
15 W (Max 60W)– See separate service manual
Consumption:
T1 A (Voltage)
Mains voltages and fuses:
Temperature:
Rel. Humidity:
Storing/handling:
15 – 35 °C
30 – 90%
Temperatures below 0°C and above 50°C may cause permanent
damage on the instrument and its accessories.
10 minutes at room temperature (20 °C).
Warm up time:
Impedance Measuring System
Probe tone:
Air pressure:
Frequency:
Level:
Control:
Indicator:
Range:
Pressure limitation:
Pressure change rate:
Compliance:
Test types:
Range:
Tympanometry
Indicators:
Eustachian Tube Function
Graphical display
Memory:
Tympanometry:
Eustachian Tube Function:
226 Hz
85 dB SPL with AGC, assuring constant level at different volume.
Automatic.
Measured value is displayed on the graphical display.
-600 to +300 daPa.
-800 daPa and +600 daPa.
Minimum (50 daPa/s), medium, maximum or automatic with
minimum speed at compliance peak. Selectable in the set-up.
0.1 to 6.0 ml (Ear volume: 0.1 to 8.0 ml).
Automatic, where the start and stop pressure can be userprogrammed in the set-up function.
Williams test (automatic function).
Compliance is indicated as ml and pressure as daPa.
Stimulus level is indicated as dB Hearing Level.
1 curve per ear.
3 curves per ear.
Reflex and Audiometer Functions
Signal sources:
Inputs:
Outputs:
Tone - Contra, Reflex:
Tone , Audiometry:
Tone - Ipsi, Reflex:
Noise - Contra, Reflex:
Noise - Ipsi, Reflex:
Patient Response:
Earphone Right/ Left
Contra Earphone:
Ipsi Earphone:
Air:
USB:
Attenuator:
Keyboard:
Range:
Test types:
Manual Audiometry
Automatic Audiometry
Test types:
Manual Reflex
Reflex Decay:
Memory:
250, 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz.
125, 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, 8000
HZ.
500, 1000, 2000, 3000, 4000 Hz.
Wide Band, High Pass, Low Pass.
Wide Band, High Pass, Low Pass.
Connection for patient response switch.
Can be selected to be either standard earphones or insert phones
by pressing shift Right/Left
TDH39 earphone for Reflex or Audiometry measurements.
Probe earphone incorporated in the probe system for Reflex
measurements.
Connection of the air system to the probe.
Input/output for computer communication. An external PC can be
made to both monitor and control the instrument. The control
actions can be followed on the display and operation panel.
Online communication can be selected, where the measured data
will be sent to an external PC.
See separate section in Service Manual for programming details.
Connection for external keyboard, standard PC type.
0 to 130 dB in 1 or 5 dB steps. Typical range is –10 to 120 dB HL.
Range is individual for different modes- see table 1
Manual control of all functions.
Auto threshold according to ISO 8253-1 (Patient controlled
Hughson-Westlake). The threshold is determined by the activation
of the patient response.
Manual control of all functions.
Manually controlled with stimulus duration of 10 s.
6 ipsi and 6 contra graphs/curves. Each can have up to 6 pulses.
AT235 Service manual page 3
Printer (Optional):
There is additional capacity for 6 manual tests.
Thermal printer with recording paper in rolls.
112 mm
21 s for worst case (2 tympanograms + 16 reflexes + 2
audiograms)
Type:
Paper width:
Printing time:
Table 1: Frequencies and intensity ranges
Frequency
Reflex
Audiometry
Contralateral
Ipsilateral
Min
dB HL
TDH39
Hz
Min
dB HL
Max*
dB HL
Max*
DB HL
Min
dB HL
Max
dB HL
250
10
110
-
-
-10
110
500
10
120
10
105
-10
120
1000
10
120
10
110
-10
120
2000
10
120
10
105
-10
120
3000
10
120
10
100
-10
120
4000
10
120
10
100
-10
120
6000
10
120
-
-
-10
120
8000
10
110
-
-
-10
110
WB noise
10
120
10
105
LP noise
10
120
10
105
HP noise
10
120
10
105
* Note: Max values are obtainable by selecting “Ext. Range” in the set-up.
AT235 Service manual page 4
Specification of input/output connections
Inputs
Connector type
Electrical properties
Patient response
Jack, 6.3mm stereo
Handheld switch:
5V through 10kΩ is forced to gnd. level when
activated.
Keyboard
DIN, 5 pole
Pin 1:
Pin 2: (Grey)
Pin 3: (Violet)
Pin 4: (White)
Pin 5: (Black)
NC
RXA1
Sync clk.
VDD, 5V
Gnd.
Jack, 6.3mm mono
Voltage:
Min. load impedance:
Up to 5.5V rms. by 10Ω load
5Ω
Phones, Contralateral Jack, 6.3mm mono
Voltage:
Min. load impedance:
Up to 5.5V rms. by 10Ω load
5Ω
Transducer
CANON, 15 pole
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Press. 1 signal
12V
-12V
Remote key
Probe tone
Mic. signal
LED blue
Press. 2 signal
LED green
Ipsi Stim. Gnd.
Ipsi Stim. Signal
Probe tone Gnd.
Gnd.
Vref., 5V
LED red
USB type”B”
USB port for
communication
See appendix A in service manual for detailed
information
Outputs:
Phones, Left/ Right
Data I/O:
USB
AT235 Service manual page 5
Calibration properties
Calibrated Transducers:
Accuracy:
Contralateral Earphone:
Probe system:
Audiometry headset:
General
Audiometer and Reflex
Frequencies:
Contralateral Reflex and
Audiometer Tone Levels:
Ipsilateral Reflex Tone Levels:
Pressure measurement :
Compliance measurement:
Telephonics TDH39 with a static force of 4.5N ±0.5N
Ipsilateral Earphone: is integrated in the probe system
226 Hz transmitter and receiver and pressure transducer is
integrated in the probe system
Telephonics TDH39 with a static force of 4.5N ±0.5N
Generally the instrument is made and calibrated to be within
and better than the tolerances required in the specified
standards:
±3%
±3 dB for 250 to 4000Hz and ±5 dB for 6000 to 8000Hz
±5 dB for 500 to 2000Hz and +5/-10 dB for 3000 to 4000Hz
±5% or ±10 daPa, whichever is greater
±5% or ±0.1 ml, whichever is greater
Impedance calibration properties
226 Hz ±1%
85 dB SPL ±1.5 dB measured in an IEC 126 acoustic coupler.
The level is constant for all volumes in the measurement range.
Distortion:
Max 5% THD
Compliance
Range:
0.1 to 6.0 ml
Temperature dependence:
-0.003 ml/°C
Pressure dependence:
-0.00020 ml/daPa
Reflex sensitivity:
0.001 ml is the lowest detectable volume change
Temporal reflex characteristics: Initial latency = 10 ms (±5 ms)
Rise time = 75 ms (±5 ms)
Terminal latency = 10ms (±5 ms)
Fall time = 75 ms (±5 ms)
Overshoot = max. 8%
Undershoot = max 10%
Pressure
Range:
Values between -600 to +300 daPa can be selected in the setup.
Safety limits:
-700 daPa and +500 daPa, ±100 daPa
Reflex/audiometer calibration standards and spectral properties:
Probe tone
Frequency:
Level:
General
Contralateral Earphone
Specifications for stimulus and audiometer signals are made to follow EN 60645-1
Pure tone:
ISO 389-1 for TDH39.
Wide Band noise (WB):
Interacoustics Standard
As “Broad band noise” specified in EN 61027, but with 500 Hz
− Spectral properties:
as lower cut-off frequency.
Low Pass noise (LP):
Interacoustics Standard
− Spectral properties:
Uniform from 500 Hz to 1600 Hz, ±5 dB re. 1000 Hz level
High Pass noise (HP):
Interacoustics Standard
− Spectral properties:
Uniform from 1600 Hz to 10KHz, ±5 dB re. 1000 Hz level
Pure tone:
Interacoustics Standard.
Wide Band noise (WB):
Interacoustics Standard
As “Broad band noise” specified in EN 61027, but with 500 Hz
− Spectral properties:
as lower cut-off frequency.
Low Pass noise (LP):
Interacoustics Standard
− Spectral properties:
Uniform from 500 Hz to 1600 Hz, ±10 dB re. 1000 Hz level
Interacoustics Standard
High Pass noise (HP):
Uniform from 1600 Hz to 4000 Hz, ±10 dB re. 1000 Hz level
− Spectral properties:
General about levels:
The actual sound pressure level at the eardrum will depend on
the volume of the ear. See Table 2 for details.
Ipsilateral Earphone
AT235 Service manual page 6
Table 2
Freq.
Reference values for stimulus and audiometer
calibration
Variation of ipsi stimulus levels
for different volumes of the ear
canal
Relative to the calibration performed on an
IEC 126 coupler
ISO 389-1
ISO 389-2
TDH39
IPSI EAR3A
(CIR22)
[dB re. 20 µPa]
[Hz]
[dB re. 20 µPa]
Interacoustics Standard
TDH39
Ipsi
[dB re. 20 µPa]
[dB re. 20 µPa]
0.5 ml
1 ml
[dB]
[dB]
125
45
250
25,5
500
11,5
5,5
9.7
5.3
1000
7
0
9.7
5.3
1500
6,5
Sound
attenuation
values for
TDH39
earphones
using MX41/AR
or PN51
cushion
[dB]
3
5
7
15
21 (1600 Hz)
2000
9
3,0
11.7
3.9
3000
10
3,5
-0.8
-0.5
26
31 (3150 Hz)
4000
9,5
5,5
-1.6
-0.8
32
6000
15,5
8000
13
26 (6300 Hz)
24
WB
-8.0
-5.0
7.5
3.2
LP
-6.0
-7.0
8.0
3.6
HP
-10.0
-8.0
3.9
1.4
Coupler types used by calibration
TDH39 is calibrated using a 6cc acoustic coupler made in accordance to IEC 303
Ipsilateral earphone and probe tone are calibrated using a 2cc acoustic coupler made in accordance to IEC 126
Output voltages (regulated):
Pin no.
1
2
3
4
5
Voltage
Gnd.
Gnd.
+5
-12
+12
4
1
Cont. current A
0.5
0.7
0.5
2
Peak current A
1.0
3.0
1.5
5
3
View on output pins
AT235 Service manual page 7
General about specifications
Interacoustics continuously strive to improve the products and their performance. Therefore the specifications can
be subject to change without notice.
The performance and specifications of the instrument can only be guarantied if it is subject to a technical
maintenance at least once a year. This should be made by a workshop, authorised by Interacoustics.
Questions about representatives and products may be sent to:
Interacoustics A/S
Phone:
+45 63713555
Drejervaenget 8
Fax:
+45 63713522
DK 5610 Assens
email: [email protected]
Denmark
http: www.interacoustics.com
AT235 Service manual page 8
Calibration Procedure
General Information
Service, Adjustment and Repair
This instrument can be serviced, adjusted and repaired without losing the validity of the CE-marking provided the
measuring equipment used is fulfilling the demands below, the adjustment procedure are followed and the
personnel is having the necessary qualifications approved by Interacoustics.
Before any kind of the calibration can take place, the AT235 must have been on power for at least 3-5 minutes in a
normal temperature milieu, and the instrument must be in the same milieu for a reasonable time.
While keeping <shift> and <Print> buttons down, switch power on at the rear panel of the instrument. By use of the
F keys enter password: 1 2 3 4 . The AT235 is now in software calibration menu.
If a printer is connected to the instrument is it possible to get a complete detailed description of the instrument setup.
While keeping <shift> and <Store> buttons down, switch power on at the rear panel of the instrument.
The AT235 has to kinds of calibration: hardware and software calibration. The software calibration can be done
without opening the instrument. When the instrument has been hardware calibrated, it must be followed by a
software calibration.
Error in stored data (EEPROM Error)
If any error occurs in stored data an error dialog box is displayed when powering up. The text will be “EEPROM
Error!!!”, "Contact Technician!".
Please power off and on the instrument once, if the problem still occurs please see instruction below.
Before trying anything, please read the whole instruction and be aware that the instrument needs to be recalibrated no mater what you do.
What happens if …
1.
2.
3.
4.
Should this error box occur press <shift>+<Print>
Enter the password for entering the Calibration menu
Select the EEPROM menu (F4)
Press F6 for doing a totally data recovery. By doing so the program inserts factory data all over the
EEPROM.
5. Turn off/on power and see if the error box comes again.
6. If so replace the EEPROM IC on the main board (HN58C65)
7. Recalibrate the instrument under all circumstances.
Note! This error is probably an indication of an unstable EEPROM IC so even though the system should work after
at total recovery it is recommended to change the IC.
AT235 Service manual page 9
Equipment for the Calibration
In order to assure correct calibration of the audiometric equipment, it is important that the necessary measuring
equipment is used and that it is reliable and stable.
Minimum requirements for measuring equipment:
-
Measuring amplifier with input for condenser microphone or a sound level meter, fulfilling the
demands of IEC 651 Type 1.
Acoustics coupler, 6cc and 2cc fulfilling the demand of IEC 303 and IEC 126.
1” pressure field condenser microphone for the above-mentioned couplers, fulfilling the
demands of the IEC 1094-1.
Manometer with a range from at least +300 to – 600 daPa and a accuracy of ± 5% of reading
or ± 5 daPa which ever is the greatest. Including a syringe (manual pump).
The CAT40 calibration cavities (0.5, 2.0 and 5.0 ml)
It is recommended to have an acoustic calibrator for the control of the complete measuring
chain
General purpose frequency counter
General purpose digital multimeter
General purpose oscilloscope in order to trace and monitor signals
Air System
The safety valves and the pump system are adjusted in correct way from factory. Normally it should not be
adjusted, but if the pump tube has to be exchanged it is necessary to readjust the spring on the pump. Please
always use pre-cutted pump tubes ordered from Interacoustics.
Control of the pump system:
Go to Calibration > Probe > Press > Real menu. Place the probe into a cavity (airtight connection). Press the Æ
button (F2) until you reached +300 daPa in the “Pump Ctrl” field on the display. If the build-up pressure keep at 300
daPa the system is airtight.
If the instrument is out of calibration you can connect an external manometer and a syringe between the air
connection on the rear plate and the probe tube. Press the syringe until +300 daPa is reached and inspect the
manometer. If the pressure is stable the system is airtight.
Safety valve:
The safety valve must release the pressure then the pressure is out of limit. It means if the pressure is larger than
+500 daPa (± 100 daPa) or if the pressure is larger then –700 daPa (± 100 daPa).
Adjustment of the pump spring:
Disconnect the probe tube from the air connection on the rear plate. Connect a manometer and a syringe between
the air connection and the probe tube. Go to Calibration > Probe > Press > Real menu. Place the probe into a
cavity (airtight connection). Press the Æ button until +400 daPa is reached and inspect the manometer. Adjust the
spring until the pressure decrease very slow down. Pump again until +400 daPa is reached. Inspect the
manometer and if the pressure is stable or decrease very slow the adjustment is fine, else turn the screw clockwise
until the manometer is stable. Repeat the pump procedure again and inspect the manometer for stable pressure.
Repeat this until the pressure is stable. Now the spring is correct adjusted.
Before the contra nut is fasten the screw has to bee turned three times clockwise to be sure that the system is and
will stay airtight.
AT235 Service manual page 10
Hardware Calibration
To enter the calibration menus please switch off power – hold down shift while pressing Print key – turn on power
again. Hold the keys down until you can enter a password. The factory setting of the password is 1 2 3 4, but
dealer may have changed it in order to protect the calibration.
Note! The hardware calibration is normally only done once in the instrument lifetime and at the factory.
Measuring points (MP) refers to Main board Index page 38.
Measurements are made with reference to MP13, MP4 and MP15 (GND)
Attenuator Calibration
Enter the Attenuator Calibration menu from the Calibration menu by pressing F5 – “Att”.
This is the calibration picture for channel 1.
Attenuator Calibration channel 1. Figure 1
Change to Channel 2 by pressing Swap (F6) in order to calibrate channel 2.
Attenuator Calibration channel 2.Figure 2
AT235 Service manual page 11
Fixed Attenuator Check
Enter the Fixed Attenuator Check menu from the Calibration menu by pressing F6 – “Fixed”.
Attenuator Calibration. Figure 3
Follow the instructions on the screen.
AT235 Service manual page 12
Software Calibration
A software calibration must always be performed when the instrument has been opened for hardware calibration or
if an EEPROM error has occurred.
The calibration is a service calibration, which means, that if the instrument has changed its values during time or
because of manual chock, corrections for moderate changes in the software can be made by means of the figures
in the EEPROM.
To enter the calibration menus please switch off power – hold down shift while pressing Print key – turn on power
again. Hold the keys down until you can enter a password. The factory setting of the password is 1 2 3 4, but
dealer may have changed it in order to protect the calibration. If an EEPROM Error occurs during the power up,
press shift + print to continue to the password screen.
The Calibration Menu. Figure 4
Notice!
For calibration of the Universal Transducer for both types of probetips, you must carry out the probe calibration
twice.
Repeat pages 17-21 after switching probe tip.
Probe Calibration
To enter this menu from the Calibration Menu Press “Probe” (F2).
Probe Calibration Menu. Figure 5
AT235 Service manual page 13
Pressure Calibration
Pressure Calibration. Figure 6
Looking at the picture you will see two lines (if the instrument is calibrated) in a diagram. The dotted line is the
calibration line that graphically gives you information regarding the calibration of the pressure. The normal line is an
average line and by comparing the two lines you can get quick overview of the pressure calibration. You can also
read the actual ADC values under Points if necessary.
To Calibrate Pressure System
Press Calib (F1) and follow the instructions on the screen.
To Test the Probe Calibration
If the probe is calibrated you can test the calibration among other things in the “Probe Real Mode”. Select Real (F6)
to enter this menu.
AT235 Service manual page 14
Probe Tone Calibration
Probe Tone Calibration Figure 7
This is the menu for calibration of the different probe tones. The dotted line in the bar shows the adjustment level.
To calibrate Probe tone levels
Follow instructions on the screen.
Fine (F4) and Rough (F5)
Fine and Rough gives the resolution of the steps when adjusting the probe tone level. You can see what resolution
that is selected when looking at “Adjust Resolution” at the display. Selecting Fine the resolution will be 0,1 dB and
selecting Rough the resolution will be 0,5 dB.
AT235 Service manual page 15
Compliance Calibration
Compliance Calibration. Figure 8
Entering this menu you need to confirm that the Probe Tone is calibrated correctly (see Probe Tone Calibration). If
not press Exit (F6) and go trough the procedures of Pressure Calibration and Probe Tone Calibration.
To calibrate Compliance
Press Calib (F1) and follow the instructions on the screen.
To test the Probe Calibration
If the probe is calibrated you can test the calibration among other things in the “Probe Real Mode”. Select Real (F6)
to enter this menu.
AT235 Service manual page 16
Probe Real Mode
Probe Real Mode Figure 9
This menu is designed for testing the calibration of the Probe system and the pressure safety valves.
Manual pump control
Use F1 or F2 to change “Pump Control” (status window to the right) until it shows the descried pump pressure.
Notice the “Pressure” status window below.
Safety valve test
The safety valve in the pressure system is designed with -800 daPa as minimum and +600 daPa as maximum
limits for pump pressure (normal pressure range is –600 to 300 daPa). Note! The safety valve may release before
limits.
Connect a manometer to the pressure system that can measure pressures from –800 daPa to +600 daPa.
Press “Valve -” (F3) until the manometer stops its movement. Notice the pressure and if the pressure lies within –
800 and –650 daPa the valve works properly.
Press “Valve +” (F4) until the manometer stops its movement. Notice the pressure and if the pressure lies within
+350 and +600 daPa the valve works properly.
Ipsi Calibration
Ipsi Calibration Menu. Figure 10
This is the ipsi calibration menu.
AT235 Service manual page 17
In the audiogram in the screen picture you can see the calibration of the ipsi transducer and the calibration level by
looking at lines. The dotted lines are the calibration values drawn with offset in the calibration level (normal line).
Above the audiogram we have an information window.
The information window
The information window contains information that can be helpful working with the calibration. The figure below
shows what kind of information that is displayed.
Patient Response
Tone Switch
Current Frequency
Current Level
Calibration Value
Frequency Maximum Level
Information Window. Figure 11
How to calibrate…
1. Select by means of frequency increase/decrease the frequency to be calibrated or start to calibrate the
pre-selected frequency.
2. Press intensity increase/decrease for channel 1 until the desired sound pressure level has been achieved.
3. Press store. The instrument will automatically jump to the next frequency.
4. Continue to calibrate the new frequency or select another.
To Test the Ipsi Calibration
When done with the ipsi calibration you can enter the “Ipsi Real Mode” to test the calibration. Select Real (F6) to
enter this menu.
AT235 Service manual page 18
Headset Calibration
Headset calibration. Figure 12
This is the headset calibration menu.
In the audiogram in the screen picture you can see the calibration of the transducer and the calibration level by
looking at lines. The dotted lines are the calibration values drawn with offset in the calibration level (normal line).
Above the audiogram we have an information window.
The information window
The information window contains information that can be helpful working with the calibration. The figure below
shows what kind of information that is displayed.
Patient Response
Tone Switch
Current Frequency
Current Level
Calibration Value
Frequency Maximum Level
Information Window. Figure 13
How to calibrate
1. Select by means of frequency increase/decrease the frequency to be calibrated or start to calibrate the
pre-selected frequency.
2. Press intensity increase/decrease for channel 1 until the desired sound pressure level has been achieved.
3. Press store. The instrument will automatically jump to the next frequency.
4. Continue to calibrate the new frequency or select another.
5. Select a new output by pressing Right or Left and repeat from step 1.
6. Select a new output (TDH39, CIR22 or EAR3A) by pressing F1, F2 or F3 and repeat from step 1.
To test the headset Calibration
AT235 Service manual page 19
When done with the headset calibration you can enter the “Headset Real Mode” to test the calibration. Select Real
(F6) to enter this menu.
Factory Calibration Values
EEPROM Service Menu. Figure 14
If needed it is possible to insert factory data for either the calibration or for the whole setting of the instrument.
Insert Factory Calibration Values
The Calib (F5) function inserts factory values all over the calibration (calibration values, maximum levels,
calibration levels, extended range settings and filter settings), but leaves the set-up data untouched.
The Total function
Total (F6) is a function that is designed for pre calibrating the EEPROM if the IC are replaced. The function inserts
values into the calibration and the set-up that lies close to the final calibration.
Note! Using the “Calib” and the “Total” function always requires the instrument to be recalibrated.
AT235 Service manual page 20
Disassembly
Open Cabinet
Remove 2 Torx screws A -use Torx tool T20
Remove 3 EMC screws B – use PZD1 tool
The main part of the two-piece bottom plate can now be removed for calibration
For exchange of the pump tube, remove 2 Torx screws C –use Torx tool T20
Pump Tube Connections
1 & 4 Wire connections from pump to
Main board CO19
2
Tube from air reservoir to pump
Part number 38004101, length 85mm
3.
Tube from air reservoir to Rear Panel Air Pipe
Part number 38000301, length 320mm
AT235 Service manual page 21
Pump Tube Replacement
Loosen the spring fixing screw (1), unhook the spring (2) and the pump arm (3) can be drawn out
Remove the screw (4) and the tube fixing plate is loose
Spare part numbers:
Pump complete
Pump tube complete
56000201
56002301
After the screw and the tube fixing plate is loose, the tube (5) can now be pulled out for replacement
For reassembling:
Put in the new tube and mount the fixing plate
Push in the pump arm, fix with the spring and tighten the spring
AT235 Service manual page 22
Electrical Assembling Instrument
I06004002
Rear Panel Connections
AT235 Service manual page 23
Transducer Wire and Tube Connections
Wire Connections
Tube Connections
AT235 Service manual page 24
Transducer Spare parts
ATP-AT235u Transducer
Part number 80300201
AT235u Probe, clinical
Part number 80310101
AT235u Probe, diagnostic
Part number 80310201
Silicone hose Part number 38000201 40mm
Kit probe module with wires 050/.. Part number 80310601
Gasket Part number 34111201 Probe tip Part number 34626003
Cap Probe Part number 31423502
AT235 Service manual page 25
Printer Connections
Connector No.
Function
CN1
Thermo head
CN3
Power
Pin
1
+24V
2
GND
3
GND
4
+5V
CN5
Detector
CN6
Motor
CN8
Parallel Port/Centronics
Jumper J1-J7
Keyboard and LED’s
Place a jumper on J3 to
enable restore fonts
AT235 Service manual page 26
MP8
MP4
LEFTPH CH1
GND
MP2
IC8 & IC9
IC4
MP1
IC3
0 - 120dB
0 - 20dB
ATT.
FIXED
ATT.
IC27
12KHz
LPF
IC25
PROBE
TONE
IC1
MIC
IC13
IC29
ATT1,0
ATT1,1
ATT1,2
ATT1,3
MP5
IC16 & IC17
CH1
OUTPUT
SWITCH
STEREO
IC15
+20dB CH1
MP3
IC14
0 - 120dB
0 - 20dB
ATT.
FIXED
ATT.
PRESSURE
SENSOR
RESET
IC21
CH2
IC5
IPSI
CH1 L/R
CH1 L/R
CH2 L/R
VREF
LED R LED G LED B
NAVIGATION
KEY
CH2 L/R
LED R
LED G
LED B
OUTPUT
SWITCH
+20dB CH2
ATT2,0
ATT2,1
ATT2,2
ATT2,3
IC57
IC89
IC90
RIGHTPH CH2
IPSI CH2
CONTRA
CONTRA CH2
BONE CH2
PROBE
SEL / NAV
IC7
IC42
PROBE
SEL/NAV
IC12
+20dB
12KHz
LPF
MP9
BONE CH1
IC5
+20dB
CODEC
PCM3001
TRANSDUCER
RESET
PROBE CH1
IC26
DUAL DAC
AD7249
DSP
TALK FORWARD
LEFT
IC31
IC23
AD2186
RIGHT
Not used
IC41
ADC
AD7896
IC97, IC98, IC103, IC104
DATA
SWITCH
IC83
IC72
FLASH
IC77
IC76
RAM
EEPROM
IC99
IC66
MOTOR
CRTL.
A3977
USB /
IC54
RS232
RAM
USB
CPU
MC68306
M
KEYBOARD
IC62
MP13
DISPLAY
IC53
IC55
IC60
YGV610B
PAT. RESPONSE
GND
PIO
V5
PRINTER
12V/24V
PRINTER
INTERNAL
LED R, LED G, LED B
KEYBOARD
PCB
Date
TONESWITCH
Constr.
160800
Revision 180107
PRN240
Title
Constr.
Appr.
SJ
HBJ
Sheet
PSC
OG
1 of 1
Blockdiagram 050/051
Partno. -
NP = Not Present
Drawingno. D02018501
AT235 Service manual Page 27
VDD1
LED ADJ
24pol
GND
GND
GND
VDD
C14
220n
10%
X7R
GND
47K5
C13
220n
2%
NP0
R8
10K
10%
X7R
R5
10M
1
GND
GND
TSW IN
TSW CLK
R7
CLK3
10K
T2
BC847
R6
47K5
R11
2
C9
22p
C8
22p
5%
NP0
5%
NP0
R4
10M
IC2A
4070
D10
LL4148
3
C6
220n
10%
X7R
GND
14
C11
10n
10%
X7R
VDD
R3
5
C3
6u8
20%
6
R2
10K
+
IC2B
4070
4
10K
C4
10n
10%
X7R
7
C7
10n
10%
X7R
VDD1
C15
220n
10%
X7R
GND
GND
47K5
COMDATA
SHIFT
GND
GND
GND
GND
GND
D13
D12
LL4148
LL4148
VDD
LED ADJ
GND
C10
220n
R9
22K
10%
X7R
IC3
15
2
13
4
11
6
NP
VDD
C16
10n
10%
X7R
OSCin
7
GND OSCout
9
VDD
8
1
14
3
12
5
10
Ain
Bin
Cin
Din
Ein
Fin
IC2C
4070
9
GND
SW1
Aout
Bout
Cout
Dout
Eout
Fout
16
8
C12
220n
10%
X7R
10
14
COMDATA
SHIFT
CLK3
1
12
IC2D
4070
2
3
Intensity
GND
GND
GND
N1
GND
13
Touch Switch
Not standard
11
7
CLK3
COMDATA
14
TSW IN
TSW CLK
VDD
VDD1
VDD
VDD
GND
GND
7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VDD1
VDD
VDD
GND
GND
14
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C5
10p
R10
CO2
7
CO4
GND
C17
1n5
10%
X7R
MC14490
GND
VDD
R1
2K
S2
GND
S3
Pause
S4
S9
S10
Ipsi
Tymp/Reflex
Contra
S15
EFT
S17
Audiometry
S19
C1
10n
CO3
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
24pol
Print/
Print
Screen
CO1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
dB1A
dB1B
ROW0
ROW1
ROW2
ROW3
COL0
COL1
COL2
COL3
COL4
COL5
COL6
COL7
S22
S11
S13
Right
Store/
No
Response
S6
F1
dB1A
dB1B
F2
S20A
XA4
ROW0
ROW1
ROW2
ROW3
2
2A
1
1A
Frequency
Decrease
S20B
XA4
3
3A
4
4A
Frequency
Increase
S8
S12
F3
F4
S21A
XA4
1
1A
S16
F5
S21B
XA4
2
2A
Intensity
Decrease
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
Left
S14
S5
4
4A
F6
S18
Menu/
Delete
S7
VDD
GND
Man.
*
High
Probe
Tone
3
3A
Intensity
Increase/
Extended
Range
COMDATA
CLK3
COL0
COL1
COL2
COL3
COL4
COL5
COL6
COL7
2
C2
10n
10%
X7R
10%
X7R
IC1
S1
T1
BC857
LED ADJ
Shift
OUT18
OUT19
OUT20
OUT21
OUT22
OUT23
OUT24
OUT25
OUT26
OUT27
NC
OUT28
OUT29
OUT30
OUT31
OUT32
OUT33
OUT34
OUT35
DATA
CLK
VSS
VDD
BC
22
21
NC
NC
OUT17
OUT16
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT09
NC
OUT08
OUT07
OUT06
OUT05
OUT04
OUT03
OUT02
OUT01
1
23
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
GND
VDD
5451V
GND
D8
Left
D6
Right
D15
High Probe Tone
D1
Print/Print Screen
D14
Man.
D11
Audiometry
D9
EFT
D7
Contra
D5
Ipsi
D4
Reflex
D3
Tymp
D2
Pause
*
NP
* S7, D15
Only in Instruments
with High Probe Tone
C18
220n
GND
C20
220n
N2
GND
10%
X7R
C19
220n
N4
GND
10%
X7R
10%
X7R
N3
Interacoustics A/S
Power Supply
VDD1 = +12VDC
VDD = +5VDC
GND = 0VDC
NP = Not Present
Approved
Date
Constr.
Construction
160201
PSC
HBJ
Revision
130606
PSC
OG
Title
Keyboard
Partno.
69008902
Sheet 1 of 1
Drawingno. D02006602 050
AT235 Service manual Page 28
Components Index and Values
Notice: CO1 and CO2 are sited on the rear side of the PCB
S7 High Probe Tone switch is only present on the AT232h
AT235 Service manual page 29
Keyboard Part List
PCB 69008902 Assembled Board PCA 51003302
Quantity Part Reference
6
1
1
1
9
2
2
11
3
1
1
1
1
4
2
3
1
C1 C2 C4 C7 C11 C16
C17
C3
C5
C6 C10 C12 C13 C14 C15 C18 C19 C20
C8 C9
CO3 CO4
D1 D2 D3 D4 D5 D6 D7 D8 D9 D11 D14
D10 D12 D13
IC1
IC2
IC3
R1
R2 R3 R7 R8
R4 R5
R6 R10 R11
R9
Part
Number
61410001
61419601
61002701
61400801
61408701
61400401
65002901
71700101
61700201
62010601
62000301
62002301
60211601
60210001
60205101
60222901
70100101
12
7
1
1
1
4
8
3
1
1
7
14
7
1
1
S1 S2 S3 S4 S9 S10 S11 S13 S15 S17 S19 S22
S1 S3 S9 S10 S15 S17 S19
S11
S13
S2
S20 S21
S20 S21
S20 S21 S24
S22
S4
S5 S6 S8 S12 S14 S16 S18
S5 S6 S8 S12 S14 S16 S18
S5 S6 S8 S12 S14 S16 S18
T1
T2
36302001
36307101
36307501
36307401
36309201
35400101
35500201
51000301
36309301
36307201
33502401
35303601
36302901
64600101
64600401
Value
10n
1n5
6u8
10p
220n
22p
24pol
LED
LL4148
5451V
4070
MC14490
2K
10K
10M
47K5
22K
SW
PUSHBUTTON
tast_1
tast_1
tast_1
tast_0
nut
pertinaxskive
XA4
tast_0
tast_2
carbon Switch
screw
xmkn0008
BC857
BC847
Toleranc
e
10%
10%
20%
2%
10%
5%
1%
1%
1%
1%
5%
AT235 Service manual page 30
VDD
a[1..23]
d[0..15]
C341
100n
d[0..15]
dr[0..4]
dr[0..4]
Test point
VDD
VDD
IC49,5
IC100
NC7SZ08
2
RESET#
VDD
MP12
VCPU
IC49
7
2
RESIN#
3
1
VDD
1
6
21
22
37
42
C249
22n
C252
22n
+ C173
47u
20%
VDD
SENSE
RESIN
RES
CT RES
8
REF GND
4
KM416C1200CJ
GND
VDD
IC49,6
GND
R151
1K
C342
NP
GND
GND
1
C348
100n
VDD
IC108
NC7SZ32
2
IC110 GND
4
2
IC99,33 BDBUS6_PRG
GND
4
RESET§
TMS
TDI
TDO
TKC
GND
VDD
CO21,1
CO21,2
CO21,3
CO21,4
IC48,5 - IC62,61
IC37,11 - F1,2
TP3
TP4
TP5
TP6
TP7
TP8
RxDB
IP2
TP10
TP11
TP12
TP13
VDD
GND
GND
NC7ST04
IC101 GND
4
2
IC100,4 RESET#§
22n
C343
100n
RESET
VDD
C178
22n
GND
VDD
C378
22n
10%
X7R
IC101,2 - IC27,28
IC26,6 - IC54,33
RESET#§
RESET# IC100,2 - IC99,4 IC83,12
RESET IC101,4 - IC108,1
C172
GND
C182
22n
5
6
C164 TL7705A
100n
C251
22n
R152
1K
PAD1
CO11,1
CO11,2
CO11,3
CO10,1
CO10,2
CO10,3
5
R144
10K
GND
4
3
14
30
31
29
13
1
IC99,33 BDBUS6_PRG
3
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
RAS
D12
UCAS D13
LCAS D14
OE
D15
WE
VDD
VDD
VDD
GND
GND
GND
5
dr2
dr1
dr0
dr3
dr4
d0
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10
d11
d12
d13
d14
d15
2
3
4
5
7
8
9
10
33
34
35
36
38
39
40
41
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
5
17
18
19
20
23
24
25
26
27
28
RESET IC49,6
GND
NP
3
a1
a2
a3
a4
a5
a6
a7
a8
a9
a10
5
IC72
3
a[1..23]
GND
IC76
TP88
TP87
TP86
R149
4K75
c6
R150
4K75
c7
R219
4K75
VDD
RDY/BSY
C258
22n
10%
HN58V65
RDY/-BSY IC55,38
VDD
GND
28
29
30
117
IC50
C168
22n
10%
4
VDD
1
OE
2
GND
IC100,4
3
CLK
R367
20K
RESET#§
GND
33
32
c9
c10
c11
c12
c13
c14
65
64
63
69
68
66
c4
c5
c20
9
8
6
5
VDD
14.7456MHz
R168
2K21
GND
EXTAL
XTAL
CLKOUT
AMODE
RESET
HALT
IRQ1
IRQ4
IRQ7
IACK1
IACK4
IACK7
IC51
GND
L11
C187
22n
GND
9
7
6
5
3
2
4
13
12
14
15
1
c8
R154
200
c6
c7
TSW CLK
CO9,10 Sheet 2
c2
dr3
c19
VDD
74HC4040
GND
R170
2K21
VDD
BLM18PG121SN1D
VDD
c3
5
VDD
IC93
4
dr[0..4]
C208
22n
IC70
IC72
IC75
GND
2
dr[0..4]
UDS
LDS
UW
LW
RW
OE
AS
DTACK
BERR
BR
BG
BGACK
40
39
34
FC0
FC1
FC2
dr1
dr0
dr2
10
11
12
14
15
CAS0
CAS1
RAS0
RAS1
DRAMW
NC7ST04
dr4
MC68306PV
GND
IC104E,28
IC104F,26
IC104H,28
IC104G,20
CO21
PC
Keyboard
1
2
3
4
4pol
RxDB
IP2
VDD
GND
Sheet 3
R235
R236
RxD0
TxD0
RTS0
CTS0
TP9
R311 OP1
R312 IP1
200
200
93
94
98
99
105
102
100
101
106
104
95
96
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
IC54
Sheet 1
c2
3
L11:
21
20
18
17
22
16
23
41
42
27
26
24
CS0
CS1
CS2
CS3
X1/CLK
X2
RxDA
TxDA
RTSA/OP0
CTSA/IP0
RxDB
TxDB
RTSB/OP1
CTSB/IP1
IP2
OP3
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0/IACK2
PB1/IACK3
PB2/IACK5
PB3/IACK6
PB4/IRQ2
PB5/IRQ3
PB6/IRQ5
PB7/IRQ6
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
Q1
Q2
Q3
11 RST Q4
Q5
Q6
Q7
16 VDD Q8
C344
Q9
100n
Q10
8 GND Q11
Q12
VDD
CLK
TCK
TDI
TDO
TMS
TRST
140
138
137
136
135
134
132
131
130
129
128
126
125
124
123
122
120
119
118
4
3
142
141
62
60
59
58
57
56
54
53
52
51
50
48
47
46
45
44
a1
a2
a3
a4
a5
a6
a7
a8
a9
a10
a11
a12
a13
a14
a15
a16
a17
a18
a19
a20
a21
a22
a23
MEMRDY
IC51,30
d0
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10
d11
d12
d13
d14
d15
92
90
89
88
87
86
84
83
82
81
80
78
77
76
75
70
3
8
10
11
12
13
14
15
16
17
18
19
20
22
27
30
31
32
34
35
37
38
39
41
42
43
44
51
52
54
55
56
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
IC55
EEPROM
57
60
61
62
63
65
66
67
68
69
70
72
73
74
76
78
79
80
81
83
84
87
88
89
91
92
93
94
95
96
97
98
99
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
FLASH_CE#
IC104C,12
Y7
IO-LCD
MEM-LCD
MP10
DSP1 CS
DSP RD
DSP WR
DSP AL
IC51,27
IC51,25
IC42,61
IC42,63
IC42,64
IC42,62
Sheet 4
GND
I/O/GCK1 VDD
I/O/GCK2 VDD
I/O/GCK3 VDD
I/O/GSR
I/O/GTS1 VDDio
I/O/GTS2 VDDio
VDDio
VDDio
CO27
1
2
3
4
5
6
TMS
TDI
TDO
TKC
21
22
1
44
43
42
3
2
D0
D1
D2
D3
D4
D5
D6
D7
c10
27
28
26
INT
IEI
IEO
c15
c16
39
41
RD
M1
a2
a1
5
7
C/D
B/A
c8
29
CLK
GND
c20
c9
c9
GND
R133
0
R167
NP
6
12
4
40
49
47
85
50
TMS
TDI
TDO
TCK
GND
VDD
NP
7
59
100
VDD
28
40
53
90
VDD
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
BRDY
BSTB
NC
NC
31
32
33
34
35
36
37
38
23
19
24
25
VDD
GND
30
13
PAT RESP CO9 CO20
REMOTE KEY IC59,6
PA2 IC114C,8
PA3 IC114B,6
PA4 IC114A,3
Probe select IC59,3
RS232
CO26,12
DTR
CO26,13
VDD
0
TSW
IC79,3
SHIFT
CO9,16
LED R
T6
LED G
T7
LED B
T5
VEE2 adj IC71,2
VEE2 on/off IC71,3
RDY/-BSY IC76,1
VDD
0
GND
C161
22n
GND
GND
NP
10
IC52C
74HCT08
d0
d1
d2
d3
d4
d5
d6
d7
NP
12
c14
C219
22n
13
IC52D
74HCT08
11
VDD
GND
GND
RD
M1
a2
a1
5
7
C/D
B/A
c8
29
CLK
6
12
4
40
NC
NC
CE
IORQ
D0
D1
D2
D3
D4
D5
D6
D7
27
28
26
INT
IEI
IEO
c15
c18
39
41
RD
M1
a2
a1
5
7
C/D
B/A
c8
29
CLK
6
12
4
40
NC
NC
CE
IORQ
8
dB1A GND
c12
R160
4K75
39
41
21
22
1
44
43
42
3
2
VDD
C184
22n
VDD
GND
c20 VDD
c15
c17
GND
ROW0
ROW1
ROW2
ROW3
ROW4
ROW5
ROW6
ROW7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
BRDY
BSTB
NC
NC
31
32
33
34
35
36
37
38
23
19
24
25
COL0
COL1
COL2
COL3
COL4
COL5
COL6
COL7
VDD
GND
30
13
1
2
3
16
8
6
4
5
A
B
C
VDD
GND
G1
G2A
G2B
VDD
VDD
VDD
C222
22n
VDD
GND
GND
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
ARDY
ASTB
17
16
15
14
11
10
9
8
20
18
dB1A
dB1B
COMDATA
CLK1
CLK2
CLK3
USB+5V
Select
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
BRDY
BSTB
NC
NC
31
32
33
34
35
36
37
38
23
19
24
25
dB2A
CO15,7
dB2B
CO15,8
CLK6
IC33 IC43
Att.Load/Shift IC33 IC46
CH2MON
IC34,6
DSP1 IACK IC42,58
CS POT
IC58,7
CS POT2
IC85,23
VDD
GND
30
13
2
IC52A
74HCT08
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
15
14
13
12
11
10
9
7
CO15,5
CO15,6
IC33,25
IC58,9
IC24,24
CO9,12
CO25,1
IC104,22 24
VDD
VDD
VDD
C198
22n
VDD
GND
GND
Z84C20
Power Supply
VDD = +5V
Vref1 = +2.5V
GND = 0V
Vref_pmp = +5.0V
VDD1 = +11V
Vref_pmp = -5.0V
VEE1 = -11V
VEE2 = -17V to -22V
3
VDD
C186
22n
GND
Constr.
Appr.
300501
AMJ
HBJ
Sheet
Revision 021008
PSC
NEN
1 of 7
Date
GND
Constr.
CS CDIS RC6,14 Sheet 2
Title
Mainboard 050/051/052/053
Partno.69010807
74HC138
GND
17
16
15
14
11
10
9
8
20
18
IC53
1
VDD
INT
IEI
IEO
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
ARDY
ASTB
Z84C20
VDD
C171
22n
27
28
26
22n
GND
VDD
c11
C206
VDD
GND
XC9572PQ
VDD
D0
D1
D2
D3
D4
D5
D6
D7
VDD
dB2A GND
GND
VDD
22n
21
22
1
44
43
42
3
2
VDD
22n
C154
d0
d1
d2
d3
d4
d5
d6
d7
Z84C20
IC64
GND
17
16
15
14
11
10
9
8
20
18
GND
C150
a3
a4
a5
112
114
116
113
111
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
ARDY
ASTB
NP
9
2
23
33
46
64
71
77
86
GND
GND
GND
GND
GND
GND
GND
GND
IC60
NC
NC
CE
IORQ
c13
24
25
29
1
5
6
RESET§
IC108,4
d0
d1
d2
d3
d4
d5
d6
d7
VDD
GND
PD0
PD1
PD2
CO14
PD3
&
PD4
RC3
PD5
PD6
PD7
PSTRB1
PBUSY1
PERR1
PRIME1
PSTRB2
PBUSY2
PERR2
VDD
7
19
31
43
55
67
79
91
103
115
127
139
10
A1/DRAM0
A2/DRAM1
A3/DRAM2
A4/DRAM3
A5/DRAM4
A6/DRAM5
A7/DRAM6
A8/DRAM7
A9/DRAM8
A10/DRAM9
A11/DRAM10
A12/DRAM11
A13/DRAM12
A14/DRAM13
A15/DRAM14
A16
A17
A18
A19
A20/CS4
A21/CS5
A22/CS6
A23/CS7
10K
IC48
a3
a4
a5
a20
a21
a22
a23
c3
c4
c5
c6
c7
c13
c14
c12
c15
c16
c17
c18
a19
c19
Sheet 2
c5
cvdd0
cvdd1
cvdd2
cvdd3
cvdd4
cvdd5
cvdd6
cvdd7
R134
2K21
To
Keyboard
CO15
4K75
Sheet 2
R146
14
10K
c4
R173 NP
PA4
7
c11 R195
R159
14
10K
7
VDD
GND
c10 R172
14
c2
c3
R176 NP
PA3
VDD
Sheet 7 cvdd[0..7]
To
Keyboard
CO15
VDD
7
10K
R132
c9 R166
R178 NP
PA2
R131
4K75
R129
VCC
GND
28
14
c20 R164
R130
20
27
22
VDD
VDD
R124
1
R171
10K
CE
WE
OE
c[0..20]
RC3
NC
d0
d1
d2
d3
d4
d5
d6
d7
11
12
13
15
16
17
18
19
CO14
26
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
a[1..23]
c[0..20]
13
25
49
61
85
97
121
133
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
a[1..23]
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
10
9
8
7
6
5
4
3
25
24
21
23
2
d[0..15]
cvdd[0..7]
a1
a2
a3
a4
a5
a6
a7
a8
a9
a10
a11
a12
a13
d[0..15]
Drawingno.
NP = Not Present
D02000307 050 051 052
AT235 Service manual page 31
VDD
VDD
C272
TSW Remote
Pat Resp
VDD
VDD
PAT RESP
IC55,17
R234
10K
C270
100n
4pol
Connected to Rearplate
1
IC88
NC7SZ86
2
R233
10K
R182
4K75
GND
4
TSW
VDD1
VDD
VDD
GND
GND
GND
TSW Remote/
Pat. Resp
GND
GND
GND
IC58
Sheet 1
8
9
7
IC53,15 COMDATA
CLK1
IC53,14
CS POT
IC53,37
10
6
VDD
VDD
VDD
SDI
SCLK
CS
C213
13
W1
12
B1
14
TSW IN
VDD
Sheet 1 IC51,12 TSW CLK
VEE-ADJx
GND
R155
Sheet 1 IC53,10 CLK3
VDD
DGND
AGND
Sheet 1
IC53,15 COMDATA
W2
4
IC55,32 SHIFT
Sheet 1
LED ADJ
B2
2
VDD
A2
22n
3
VDD
AD8402-100
GND
4K75
VDD
RS
SHDN
11
5
1
VDD
A1
GND
D18
6V2
R185
1K
Vref_pmp
Sheet 3 IC30 PMP CTRL
D31
6V2
IC55,31
Sheet 1
VDD
4 x 4K75 ohm
R158
4K75
VDD
25 pin Sub-D Connector
CO14
Sheet 1
PSTRB2
IC54,77
CO9
3
TSW Remote
5
GND
1
2
3
4
C273
22n
100n
CO20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
IC54,92
IC54,75
IC54,90
PD0
PERR2
PD1
IC54,89
PD2
IC54,88
PD3
GND
PD4
GND
PD5
GND
PD6
GND
PD7
GND
IC54,87
IC54,86
IC54,84
IC54,83
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
GND
PBUSY2
GND
IC54,76
GND
GND
R180
4K75
R169
4K75
RC3
Sheet 1
IC54,92
IC54,90
IC54,78
IC54,87
IC54,86
IC54,83
1
2
3
4
5
6
7
8
PD0
PD1
PRIME1
PD4
PD5
PD7
1
Data0
2
Data1
Sheet 1
PSTRB1 IC54,82
PERR1
IC54,80
PD2
IC54,89
PD3
IC54,88
GND
PD6
IC54,84
PBUSY1 IC54,81
16
15
14
13
12
11
10
9
Strobe
14
Auto Feed XT
15
Error
16
Init
17
Select in
3
Data2
4
Data3
Data4
5
6
Data5
Data6
Data7
Ack
Busy
Paper End
Select
7
8
9
10
11
12
13
19-25 GND
NP
Extern Printer
(25) (VDD ISO)
26pol
Intern Printer
24pol
GND
COL0
COL1
COL2
COL3
COL4
COL5
COL6
COL7
IC60
Sheet 1
C346
NP 10%
X7R
R317
NP
IC64,10
GND
NP
C345
NP
10%
R320
VEE-ADJx
NP
3
GND
VEE-ADJ
R316
NP
NP
C347
100n
10%
R220
NP
GND
NP
NP
TP102
VEE1
GND
IN
IN
IN
IN
OUT
1
GNDp
6
GNDp
-5V
+ C350
100u
20%
79L05
7
Vin
S/S
TP103
Vsw
5
FB
2
NFB
C380
100n
GND
R209
L27
220uH
C238
GND
100n
R210
3R01
R206
3R01
R205
3R01
Power
Supply
CO7,5
-12V_PS
VDD
GNDp
GNDp
+ C349
100u
20%
SH1
C381
100n
10% C382
X7R 100n
GND
GNDp
VDD1p
VDD
3A
SI1
C351
47n
10%
X7R
10%
X7R
R321
2K
C352
4n7
10%
X7R
GNDp
SL23
L26
33uH
1n 1%
NP0
C237
4u7
20%
C234
4u7
20%
GND
GND
R214
GND
GND
C196
220u
20%
C371
100n
10%
X7R
R363
NP
GND
D34
SMBJ5.0A
TP24
TP25
CO12
NP
C192
100n
10%
X7R
GND
R360
TP110
GND
GND
+ C179
100u
20%
R157
10K
1
2
3
4
5
6
NP
GND
V8
NP
8
C372
100n
10%
X7R
2
VIN
VEE1*
5
GND
VOUT
C376
NP
10% 1
VOUTS
X7R
V7
NP
ADJ
SD/CT
8
R364
NP
C370
100n
10%
X7R
F3
ZXM64P035G
1
C377
NP
10%
X7R
R285
1M8
R284
1M
TP101
0
C305
1u
10%
X7R
Power Supply
VIN
OUT
SENSE
SHDN BYP
1
2
VDD1
2
C373
100n
10%
X7R
R361
NP
4
GND
GND
GND
5
VEE1
D21
GND
C247
GND
D F5
MAX749
R359
0
3
5
TP109
SL23
VIN
GND
TP104
CO7,5
-12V_PS
8
1A
6
DLOW
IRFR9024N
CO7,5
CO7,6
TP20
TP21
TP22
TP23
SL23
SI3
GND
FB
6
G S
GND
GNDp
VDD1p
CO7,1
GND
SI4 1A
VIN
ON/OFF
4
7
+ C174
2200u
20%
C199 Printer
22n
R163
1K
+12V_PS
3A
4
3
DHI
CO7,1
CO7,2
CO7,3
CO7,4
+12V_PS
GND
D33
0R
TP18
TP19
GND
7
ADJ
8
CO28,15 TP18
CO28,16
GND
D32
SI2
VIN
2
SENSE
+
V+
TP16
TP17
L12
1
2
3
4
GNDp
GND
VDD
IC71
1
VDD
CO13
VDD1*
6pol
+
IC55,36 VEE2 adj
Sheet 1
IC55,37 VEE2 on/off
1
2
3
4
5
6
3R01
+ C204
2700u
20%
R162
15K4
10%
X7R
CO7,1
+
GND
10% C379
X7R 100n
CO7
100n
+ C235
47u
20%
10% C384
X7R 100n
VDD
22n
+24V DC
VDD
C231
C353
220n
10%
X7R
Vc
7
6
3
2
+ C183
10u
20%
LT1370
AREA
V3
V5
3
TP14
TP15
VDD
C194
1
2
3
6
7
+ C180
10u
20%
+ C189
2700u
20%
GND
C188
100n
4
GND
GND
GND
GND
+5V
PAT RESP
GNDp
MBRD835L
AREA
1
Vout
5
Vin
GND
8
C181
100n
CO20,3
CO20,4
TP100
10uH
C193
220n
10%
X7R
TSW Remote
d[0..15]
D46
VDD1
GND
CO20,1
CO20,2
a[1..23]
L35
GND
d1
d3
d5
d7
Character
Display
a[1..23]
VDD1p
78L05
a1
GND
VDD
Local Power Supply -5V
2
4
6
8
10
12
14
16
18
20
NP
VDD
R318
d[0..15]
V2
1
3
5
7
9
11
13
15
17
19
a2
d0
d2
d4
d6
TP18
GND
VEE1
R319
Test point
CO28
IC109
6
2
CS CDIS
VDD
C254
VDD1
24pol
Local Power Supply +5V
Sheet 1
3
6
7
R202
R203
R217
R207
R211
R212
R216
R215
IC60
Sheet 1
ROW0
ROW1
ROW2
ROW3
ROW4
ROW5
ROW6
ROW7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
7
Sheet 1
IC53
,17 dB1A
,16 dB1B
,31 dB2A
,32 dB2B
4
VDD
8 x 47K5 ohm
R198
R197
R201
R196
CO15
VDD1
VDD = +5V
GND = 0V
VDD1 = +11V
VEE1 = -11V
VEE2 = -17V to -22V
Vref1 = +2.5V
Vref_pmp = +5.0V
Vref_pmp = -5.0V
+ C185
220u
20%
GND
C375
NP
10%
X7R
R362
NP
GND
GND
C306
3
1u
+12V_PS
10%
X7R
Date
GND
Constr.
1M
Appr.
AMJ
HBJ
Sheet
Revision 021008
PSC
OG
2 of 7
Title
Mainboard 050/051/052/053
Partno. 69010807
GND
VEE2
GND
Constr.
300501
Drawingno.
NP = Not Present
D02000307 050 051 052
AT235 Service manual page 32
IC66
IC48,67 MEM-LCD
a1
a2
a3
a4
a5
a6
a7
a8
a9
a10
a11
a12
a13
a14
a15
a16
a17
a18
Pump Motor Driver
va[0..9]
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
VDD
d[0..15]
+
d0
d1
d2
d3
d4
d5
d6
d7
R269
C294
1n
SHORT2
0
C295
1n
GND
VDD1pmp
L28 100uH
1
2
C256
22n
NP
+ C265
1000u
20%
24
23
10
9
RC2
30K1
1%
NP0
HOME
2
OUT1A
OUT1B
4
25
OUT1A
OUT1B
OUT2A
OUT2B
11
18
OUT2A
OUT2B
SENSE1
SENSE2
A3977LP
GND
C299
220n
10%
C300
100n
10%
GND_pmp
CO19
1
2
3
4
IC48,38 MEMRDY
Sheet 1
IC48,66 IO-LCD
Pump
Motor
Output
RESET§
IC108,4
1
C221
GND
14
C302
100n
10%
X7R
R275
1
R276
1
C227
5%
C303
100n
10%
X7R
R277
1
100n
10%
22p
NP0
R278
1
R200
10M
C230
5%
GND_pmp
X3
24.576MHz
22p
NP0
GND
GND_pmp
0
1
100
99
98
97
96
95
94
vd0
vd1
vd2
vd3
vd4
vd5
vd6
vd7
WE
RAS
CAS
93
92
91
-we
-ras
-cas
45
5/3V
61
RESET
FLM
LC
SCK1
SCK2
M
66
67
69
68
65
flm
LD0
LD1
LD2
LD3
LD4
LD5
LD6
LD7
77
76
75
74
73
72
71
70
ld0
ld1
ld2
ld3
VDD
VDD
VDD
28
53
78
IC62
YGV610B
GND_pmp
X1I
X1O
X2I
X2O
CON0
CON1
CON2:IRQ:IRQ
CON3:WDACK:WDACK
CSY:RDRQ:RDRQ
:WD/RD:DS
:CS:WD
:TPCK:RD
:RxD:TPD7
52
54
55
56
57
58
59
GNDp
BDIR
AEN
IOR
IOW
MEMR
MEMW
MEMRDY
SEL
ISEL
64
63
62
46
47
48
49
50
51
SHORT1
TP89
31
29
3
4
5
6
30
60
27
41
42
43
44
GND_pmp
0
GND
VDD
VDD
SHORT3
+ C354
1000u
20%
c3 GND
c2
c3
c2
R181
10K
OUT1B
OUT1A
OUT2B
OUT2A
VD0
VD1
VD2
VD3
VD4
VD5
VD6
VD7
VDD
+ C301
47u
20%
GND
vd[0..7]
VDD
C236
22n
1
100
2
GND
4
flm
LC
sck1
VDD
sck1
L24
CO16
IC67
NC7SZ08
VDD
GND
VEE2
NFW31SP
R208
0
GND
GND
VDD
R204
0
BLM18PG121SN1D
L22
L25
L23
C246 C253 C255
C228 C229 C209
100n
22n
100n
100n
GND
22n
ld0
ld1
ld2
ld3
2
S1
8
5
IN
6
D
1
NP
CO19,1
CO19,2
CO19,3
CO19,4
OUT1B
OUT1A
OUT2B
OUT2A
RC2,16
RC2,15
RC2,14
PRESS1
R108
S2
VDD1
R96
Manual Pump Control
(Keyboard/Control Panel)
(Optional)
14K3
R188
5K62
7
LM6142
R97
R184
10K
VDD1
PMP CTRL
CO9,18
Sheet 2
GND
NP
2
GND
C225
22n
BC847
T6
2
IC41
AD7896
C136
22n
GND
6
VDD1
IC42,39
DSP RFS1
Sheet 4
DSP SCLK1
IC42,42
GND
C102
NP
VEE1
Vref_pmp
VDD
3
GND
4
SCLK
GND
C119
NP
4
5
IC52B
74HCT08
GND
R311
R187
LM6142
14K3
R190
10K
T8
C216
22n
GND
IC89
NC7SZ86 4
1
2
C314
22n
1
2
GND
4
R322
C355
1u
10%
X7R
100K
LM6142
14K3
R72
VDD1
IC55,16
Sheet 1
IC21
VDD1
R194
10K
1
3
GND
2
C65
22n
2
GND
RC2,7
RC2,6
RC2,5
RC2,4
RC2,3
RC2,2
RC2,1
LED_RDATA
TP37
TP38
TP39
PA4
TP40
TP41
TP42
TP43
TP44
TP45
GND
GND
IPSI
GND
LED_G-
TP46
IP1 IC54,104
VDD1
IC65A
LM6142
Power Supply
10K
NP
C211
22n
3
4
Vi
Vo
6
2
TE
GND TR
5
Vref_pmp
GND
IC20B
7
6
AD8672
REF-02
GND
R69
10K
IC20A
1
3
+ C87
10u
20%
5
GND
C78
10u
20%
AD8672
GND
VEE1
Date
VDD = +5V
GND = 0V
VDD1 = +11V
VEE1 = -11V
VEE2 = -17V to -22V
Vref1 = +2.5V
Vref_pmp = +5.0V
Vref_pmp = -5.0V
Constr.
Appr.
Constr.
300501
AMJ
HBJ
Sheet
Revision
021008
PSC
OG
3 of 7
Title
Mainboard 050/051/052/053
Partno.69010807
VEE1
GND
IC54,106
-Vref_pmp
GND
GND
OP1
VDD1
VDD1
REMOTE KEY
R312
VDD1
GND
8
5
R193
GND
GND
GND
IC65B
7
LED_BPRESS2
GND
Probe select IC55,10 Sheet 1
10K
4
6
RC2,10
RC2,9
RC2,8
NP
IC90
NC7SZ86
3
R326
GND
8
GND
TP34
TP35
TP36
D45
NP
2
3
4
100K
R291
7K87
IC57B
7
NP
3
5
GND
VDD
8
6
8
R325
GND
4
GND
VEE1
VDD
5
10K
R191
4K75
5
BC847
T7
GND
RC2,13
PROBE TONE
PROBE MIC
1
GND
TP31
TP32
TP33
VDD1
VEE1
R310
2K21
DATA
GND
TP27
TP28
TP29
TP30
6
GND
10K
TP26
Vref_pmp
8
10K
R183
4
100K
R368
1K5
TP97
DSP pf7
DSP pf6
IC42,29
DSP dr1
IC42,40
4
BC847
T5
R112
IC57A
1
SDATA
5
Vin
IC36
AD820
IC30
NP
8
7
14
3
GND
1
BUSY
CONVST
VDD1pmp
RC2,13
RC2,12
RC2,11
IC42,30
7
R324
VDD1
Vref_pmp
4
R148
1K82
2
R106
NP
GND
8
R177
576
GND
6
3
NP
VDD
0
AGND
R323
C127
22n
2
VDD1
Vref_pmp
10K
VDD
-Vref_pmp GND
R365
1K5
Pressure ADC
DSP pf5 IC42,27
NP
VEE1
TP93
TP94
TP95
TP96
GND
GND
VL
ld0
ld1
ld2
ld3
Test point
3
R94
12K4
GND
R366
2K
3K09
VGND
V+
TP90
TP91
TP92
22n
VDD
7
3
4
flm
LC
sck1
12pol
Monocrome
Display
L28,2
7
R90
49K9
R104
AD8671
10K
VEE1
GND
VDD1
s
cp1
cp2
vdd
vss
vee
d0
d1
d2
d3
vr1
vr2
12
11
10
9
8
7
6
5
4
3
2
1
D44
NP
Sheet 4
VEE1
7
3
R290
D43
10K
BAS40-05
R105
2K
IC29
6
2
R95
LED_G-
VDD1
R153
LED G
IC55,34
C223
22n
10%
C145
4
GND (Mic. GND)
GND
IPSI RL4
GND (IPSI GND)
R156
LED R
IC55,33
1K
DATA
IC35
GND
PRESS2
Located on the
Transducerboard
Sheet 1
C232
22n
10%
VDD
C144
22n
VDD1
GND
RL3
IC25 Sheet 4
R143
1K5
LED B
IC55,35
GND
C131
22n
10K
RC2,13
PROBE TONE
PROBE MIC
To Transducer
Probe
Remote
Key
R237
10K
4
VDD1
VEE1
LED_B-
15
14
13
12
11
10
9
R102
LED_R-
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
VDD1
VDD
C226
22n
10%
R82
PRESS1
4
1
2
3
4
5
6
7
8
RC2
DIP16
1
6
21
22
37
42
KM416C1200CJ
R199
GND
15 pin Sub-D
14
30
31
29
13
GND
DGND
CO18
1%
NP0
RC1
28
15
GND
6
GND
30K1
6
VBB1
VBB2
c[0..20]
CD0
CD1
CD2
CD3
CD4
CD5
CD6
CD7
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
RAS
D12
UCAS D13
LCAS D14
OE
D15
WE
VDD
VDD
VDD
GND
GND
GND
5
C296
220n
10% VDD1p
SLEEP
ENABLE
DIR
STEP
SR
RESET
MS1
MS2
PFD
AGND
AREA
PGND
R268
10K
27
26
3
19
16
17
13
12
5
22
7
AREA
21
10K
NP
Sheet 4
R273
R274
R267
GND
R270
22K6
10K
10K
IC42,87 DSP fl0
IC42,86 DSP fl1
IC42,85 DSP fl2
VCP
va0
va1
va2
va3
va4
va5
va6
va7
va8
va9
vd0
vd1
vd2
vd3
vd4
vd5
vd6
vd7
2
3
4
5
7
8
9
10
33
34
35
36
38
39
40
41
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
+
R271
22K6
R272
R328
10K
20
VDD1pmp
c[0..20]
89
88
87
86
85
84
83
82
81
80
GND
GND
GND
GND
R266
R327
NP
C298
220n
10%
X7R
VREG
CP2
GND
REF
CP1
8
VDD
VDD
IC77
GND
VDD
VDD
C297
220n
10%
C291
220n
10%
VA0
VA1
VA2
VA3
VA4
VA5
VA6
VA7
VA8
VA9
90
79
40
2
C292
100n
10%
X7R
R264
15K4
32
33
34
35
36
37
38
39
17
18
19
20
23
24
25
26
27
28
3
d[0..15]
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
C293
10u
20%
:TxD:TPD6
B: :TPD5
G: :TPD4
R: :TPD3
: :TPD2
: :TPD1
: :TPD0
R265
22K6
a19
a[1..23]
VDD
va0
va1
va2
va3
va4
va5
va6
va7
va8
va9
a[1..23]
Drawingno.
NP = Not Present
D02000307 050 051 052
AT235 Service manual page 33
3
GND
RESET#§
IC96
21
20
8
Cin-R
6
VinR
VDD
DGND
23
24
16
17
18
19
LRCIN
BCKIN
DIN
DOUT
28
RSTB
27
26
25
FMT0
FMT1
FMT2
VccADC
GNDADC
2
3
VccDAC
GNDDAC
14
13
C75
220n
VDD1
V1
1
GND
78L05
Vout
+ C103
10u
20%
GND
GND
VDD
IC100,4
2
NC7ST04
Local Power Supply, +5V
8
Vin
GND
GND
GND
GND
22
CLKIO
EMS
EE
ECLK
ELOUT
ELIN
EINT
EBR
EBG
ERESET
XTO
CH2 OUT IC17
1%
GND
NP0
BLM18PG121SN1D
L1
C374
C90
100n
100n
10%
10%
X7R
X7R
C89
100n
10%
X7R
7
6
3
2
5
82R5
GND
C91
220n
GND
MP13
GND
VEE1
NP
2K49
3V3
D25
D14
6V2
10%
X7R
R115
GND
2
R116
NP
TB/Mic2
3pol
GND
GND
C124
R110
NP
100p
1%
NP0
30K1
R241
C280
+ NP
20%
R239
NP
CO8
4
3
7
VL
GND
VDD1
C125
220n
10% GND
R118
VDD1
VDD1
IC24.30 ATT3.0
IC24.31 ATT3.1
IC24.37 ATT3.2
10%
X7R
GND
GND
11
10
9
6
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O
3 C283
IC46
VEE1
NP
10%
X7R
+5V GND
C143
C149
22n
NP
R251
NP
GND -5V
+5V
LGND
8
A
B
C
VDD
16
GND
8
VEE
7
C129
NP
C281
NP
10%
D29
7
GND
GND
VEE1
IC80
6
3
IC40A
NP
GND
INH
R222
10K
R244
D26
13
14
15
12
1
5
2
4
C276
NP
10%
X7R
NP
GND
IC24.27 ATT4.0
IC24.28 ATT4.1
IC24.29 ATT4.2
11
10
9
GND
6
D27
NP
GND
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
0
GND
A
B
C
INH
NP
3 C284
NP
10%
X7R
3
NP
+5V
VDD
16
GND
8
VEE
7
R122
3
DGND
AGND
GND
C165
NP 10%
X7R
GND
R125
GND
GND
NP
C162
NP
10%
CO4
C146
NP
CO4,1
CO4,2
+
VEE1
VEE1
GND
C153
NP
IC53,33 CLK6
Att.Load/Shift
IC53,34
Sheet 1
GND
C133
NP
C290
-5V
Input Mixer
NP
NP0
1%
C287
NP
5%
NP0
+5V
C285
NP
C286
NP
4
IN1
OUT1
GND
2
20
IN2
OUT2
17
VDD1
VDD2
13
15
+5V
+5V
VSS1
VSS2
18
7
-5V
-5V
GND1
GND2
3
19
GND
GND
GND
GND
GND
GND
GND
1
5
6
14
16
LGND
8
6
-5V
5
+5V
11
12
DIN
DOUT
9
10
CLK
L/S
IC40B
7
R255
NP
NP
10K
GND
10K
2K74
R257
1K
3
GND
MP8
R136
7
1K
-5V
-5V
C170
1u
C289
NP
5%
NP0
+5V
10%
X7R
GND
Date
+5V
C134
NP
GND
C166
22n
10%
2K74
R259
1K
AD822
Constr.
C135
NP
Constr.
AMJ
HBJ
Sheet
Revision 021008
PSC
OG
4 of 7
Mainboard 050/051/052/053
Partno.
GND
Appr.
300501
Title
-5V
GND
IC47B
7
5
GND
-5V
C110
NP
GND
C163
22n
10%
10K
6
NP
IC81B
NP
NP
GND
GND
+5V
AD822
R260
-5V
R256
GND
10%
X7R
-5V
6
C130
NP
IC47A
1
2
R145
5
GND
C160
1u
R258
GND
GND
Monitor
8
+5V
+5V
1
2
NP
3 +
C158
NP
GND
5
IC44
NP
VDD1
C169
NP
NP
4 -
R137
MP9
NP
COMDATA
IC53,15
5
VEE
10K
GND
C288
100p
1%
NP0
ATTDC2
VDD
C152
1000u
20%
NP
GND
R126
NP
R223
10K
IC45A
1
2
NP
IC81A
1
2
R253
I/O
C157
NP
10%
X7R
VDD1
NP
IC33
0
3
Attenuator Control DAC
VEE1
NP
-5V
IC38
3V3
NP
NP
1%
NP0
NP
IC45B
7
5
R221
1
C115
NP
R254
D28
3V3
C282
NP
10%
-5V
6
R147
2
GND
ROFSB
IC23
R142
R252
GND
C277
NP
1
5
6
14
16
GND
100p
1%
NP0
30K1
C141
1K
VEE1
R243
GND
GND
GND
GND
GND
CLK
L/S
NP
NP
2
GND
C126
NP
VEE1
3
R242
NP
GND
C118
NP
VDD1
GND
VEE1
VEE1
R127
D30
NP
NP
10%
X7R
GND
AD8672
4
C279
NP
1%
NP0
GND
C275
NP
IC31B
7
6
R117
47K5
GND
C147
220n
10%
GND
C278
D15
6V2
GND
5
VEE1
GND
R240
V+
GND
V-
IN
GND
VDD1
1K
+ C132
47u
20%
C139
100n
10%
X7R
C140
100p
1% NP0
CO3,1
CO3,2
AD8672
R111
47K5
VDD1
2K49
1
2
3
IC31A
1
3
R114
2
9
10
IC53,33 CLK6
Att.Load/Shift
IC53,34
DIN
DOUT
+ C100
10u
20%
VDD
15
4
GND
10K
8
GND
GND
8
S1
13
14
15
12
1
5
2
4
R113
4K75
CO3
4
C123
100n
10%
X7R
C117
100p
1% NP0
S2
D
11
12
8
CO2
3V3
8
R109
0
R103
R141 NP
GND
GND
IC32
1u
4
C122
+ 47u
20%
5
IC39
NP
VEE1
NP
C274
4K75
GND
D24
VDD1
R107
R123
NP
-5V
R224
4
R101
NP
NP
10%
NP
Tape/CD2 GND
CH2MON
IC53,35
Sheet 1
VDD
3V3
GND1
GND2
3
19
4
R100
D22
3
8
C113
CO6,1
CO6,2
3V3
6
-5V
-5V
C99
100n
10%
13
8
VOUTB
8
D23
GND
1
18
7
C175
NP
+ C111
10u
20%
IC7
4
4
VEE1
VSS1
VSS2
C159
NP
C112
100n
10%
ATTDC1
8
8
VEE1
GND
NP
+5V
+5V
6
IC34
Sheet 5
MP5
CH2 LPF Out
13
15
VDD1
C177
NP
14
IC26
CLR
LDAC
BIN/COMP
+
2
GND
GND
VDD1
VDD2
2
C142
C148
NP
NP
10%
10%
X7R
X7R
GND
VEE1
3
C96
22n
10%
GND
4
VEE1
C92
22n
10%
IC28A
1
3
GND
VDD1
C176
NP
VOUTA
4
VDD1
17
16
AD7249
6
VDD1
Tape/CD2
2
OUT2
ROFSA
1
2
IC25
AD8671
6
OUT1
IN2
SCLK
SDIN
SYNC
6
10
7
7
47K5
IN1
2
220n
10%
VDD1
4
20
8
VDD1
NP
10%
X7R
REFOUT
REFIN
8
R76
R119 NP
C212
+5V
4
C93
NP
+5V
8
NP
C109
NP
IC100,4 RESET#§
GND
GND
Sheet 5
MP2
CH1 LPF Out
20K
PROBE MIC
RC2,11
Sheet 3
1
2
Vref_dac
DSP SCLK1 IC52,5 Sheet 3
R128
Probe Mic
R93
NP
R91
NP
10%
GND
45
46
47
48
49
50
51
53
43
12
66
3
17
28
41
60
71
80
92
GND
GND
EXTGND
EXTGND
EXTGND
EXTGND
EXTGND
EXTGND
EXTGND
EXTGND
R71
NP
CO6
NP
Mic
GND
12
VDD
NC7ST04
VDD
4
IC41,5
DSP dr1
DSP RFS1
IC52,4
7
GND
CO8,1
CO8,2
2
VoutR
IC22,3 Sheet 5
C84
100p
TP99
4
6
GND
1
2
3
82R5
R121
Input Amplifiers / Buffers
4
C107
3pol
TF/Mic1 GND
DSP fl0 IC78,11
DSP fl1 IC78,6 Sheet 3
DSP fl2 IC78,7
Vref_source
IC27
PCM3001
GND
IC95
Cin+R
11
CH1 OUT IC9
11
9
12
R98
200
IC28B
7
5
NP
Tape/CD1 GND
1
2
3
GND
VrefR
7
VCOM
IC22,5
DSP WR
DSP RD
DSP AL
DSP1 CS
DSP1 IACK
Tape/CD1
GND
CO2,1
CO2,2
R120
5
15
7
TP62
TP63
CO1,1
CO1,2
1
2
3
GND
VrefL
VoutL
1%
NP0
4
IC48,72
IC48,70
Sheet 1 IC48,73
IC48,69
IC53,36
CO1
GND
C77
470p
5%
C0G
C156 22n
4
CO4,1
CO4,2
C114
NP
VDD
C319
4u7
10%
X5R
C106
100p
GND
d[0..15]
d[0..15]
TP59
TP60
TP61
GND
VDD1
C318
4u7
10%
X5R
Cin-L
4
VDD = +5V
GND = 0V
VDD1 = +11V
VEE1 = -11V
VEE2 = -17V to -22V
Vref1 = +2.5V
Vref_pmp = +5.0V
Vref_pmp = -5.0V
Stereo CODEC
Cin+L
9
Power Supply
GND
GND
Sheet 6
CO3,1
CO3,2
1
2
3
GND
4
TP56
TP57
TP58
GND
CO4,1
CO4,2
74HC4040
GND
C104
22p
5%
NP0
3
TP53
TP54
TP55
CO8,1
CO8,2
CO3,1
CO3,2
CO3,3
8
C83
470p
5%
C0G
C315 22n
8
CO2,1
CO2,2
CO8,1
CO8,2
CO8,3
64
63
62
61
58
GND
C257
100n
10%
VinL
10
8
CO2,1
CO2,2
CO2,3
C138
100n
10%
87
86
85
FL0
FL1
FL2
PWD
PWDACK
GND
TP50
TP51
TP52
16
d0
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10
d11
d12
d13
d14
d15
GND
CO6,1
CO6,2
91
96
R139
100K
L7
BLM18PG121SN1D
1
4
IWR/D7
IRD/D6
IAL/D5
IS/D4
IACK/D3
GND
CO6,1
CO6,2
CO6,3
IRQ2+PF7
IRQL1+PF6
IRQL0+PF5
IRQE+PF4
PF3
PF2[MODE C]
PF1[MODE B]
PF0[MODE A]
Q1
Q2
Q3
RST Q4
Q5
Q6
Q7
VDD Q8
Q9
Q10
GND Q11
Q12
5
Test point
30
29
27
26
88
89
93
94
VDD
9
7
6
5
3
2
4
13
12
14
15
1
CLK
11
IC108,4 RESET§
84
83
82
81
79
78
77
76
75
74
73
72
70
69
68
65
D23
D22
D21
D20
D19
D18
D17
D16
D15
D14
D13
D12
D11
D10
D9
D8
TFS0
RFS0
SCLK0
DR0
DT0
pf2
pf1
pf0
TP47
TP48
TP49
IC37
32
33
35
34
31
IC41,8 DSP pf7
IC41,7 DSP pf6
IC35,6 DSP pf5
IC42
ADSP-2186
TFS1
RFS1
SCLK1
DR1
DT1
Sheet 3
38
39
42
40
37
R135
100K
XTAL
CLKIN
CLKOUT
RESET
BR
BG
BGH
IOMS
BMS
DMS
CMS
PMS
WR
RD
IAD15/D2
IAD14/D1
IAD13/D0
IAD12/A13
IAD11/A12
IAD10/A11
IAD9/A10
IAD8/A9
IAD7/A8
IAD6/A7
IAD5/A6
IAD4/A5
IAD3/A4
IAD2/A3
IAD1/A2
IAD0/A1
A0
VDD
CO1,1
CO1,2
GND
VDD
VDD
EXTVDD
EXTVDD
EXTVDD
EXTVDD
IC100,4 RESET#§
CO1,1
CO1,2
CO1,3
GND
10
14
13
16
44
52
54
95
24
21
22
25
23
19
20
X1
12.288MHz
C105
22p
5%
NP0
TP98
GND
R138
100K
Digital Signal Processor
18
59
15
36
67
90
R140
1K
GND
dsp vdd[1..6] Sheet 7
57
56
55
11
10
9
8
7
6
5
4
2
1
100
99
98
97
X2
16.67MHz
VDD
dsp vdd1
dsp vdd2
dsp vdd3
dsp vdd4
dsp vdd5
dsp vdd6
C137
22p
5%
NP0
XTI
dsp vdd[1..6]
C151
22p
5%
NP0
69010807
Drawingno.
NP = Not Present
D02000307 050 051 052
AT235 Service manual page 34
GND
VDD1
AD8672
4
+ C79
10u
20%
C40
22n
10%
C31
22n
10%
C42
R38
GND
GND
GND
22K6
N2
+t°
N3
N2
o[0..27]
o[0..27]
IC3
RH1
21K
IC7B
7
6
5
POT SYM
IC85
GND
AD8672
R22
IC7A
1
2
AD8672
6K81
3
+ C97
10u
20%
GND
-5dB
VEE1
VEE1
-10dB
R279
10
CH1 LPF Out
IC39
Sheet 4
4K99
VDD1
GND
VEE1
AD8672
1K5
12K4
C6
10n
GND
1%
NP0
VDD1
GND
VEE1
C28
C22
22n
22n
10%
10%
GND
VEE1
GND
8
C5
1u
IC8A
1
3
GND
10%
X7R
3
7
Attenuator
GND
R4
IC4
THAT2181S
1
AD8672
C21
8
VEE1
N2
N3
N5
N6
N5
N6
TP70
TP71
19
VDD
C312
22n
10%
TP73
TP74
18
7
6
GND
RH0
21
RH0
RW0
22
Vref att
RL0
RH1
20
4
RH1
RW1
5
RW1
RL1
RH2
3
9
RH2
RW2
8
Vref att
RL2
RH3
10
16
RH3
RW3
15
RW3
RL3
17
HOLD
VCC
NC
NC
GND
VEE1
4K75
R2
13K3
R1
10K5
C356
R331
NP
3
R332
NP
GND
VDD1
GND
C88
C81
22n
10%
GND
C74
22n
10%
100p
NP0
R73
VEE1
C67
RH2
Vref att
POT SYM
IC85
1%
43K2
C358
NP
RW3
ATTDC2
IC26,3
Sheet 4
RH3
21K
2
3
POT SYM
IC85
R68
AD8672
6K81
C359
NP
5
ATT2.0
ATT2.1
ATT2.2
ATT2.3
R59
0dB
R34
R60
R280
10
VDD1
17
14
4
2
9
12
19
11
SW1/I SW1/O
13
1
SW2/I SW2/O
3
10
SW3/I SW3/O
8
20
SW4/I SW4/O
18
15
5
6
16
1K1
2K21
1K5
12K4
C58
10n
GND
1%
NP0
VDD1
GND
VEE1
C68
C59
22n
22n
10%
10%
GND
AD8672
C72
1u
3
7
GND
1
10%
X7R
VEE1
Attenuator
R64
GND
C45
22n
10%
GND
C56
22n
10%
VEE1
GND
13K3
R33
10K5
NC
MP3
C34
7
100p
NP0
IC15
THAT2181S
C47
8
R28
C71
4u7
10%
X5R
1%
R335
NP
R336
NP
22p 5%
NP0
R43
VEE1
C361
NP 10%
X5R
VDD1
VEE1
GND
R175
243K
C52
22n
10%
3
VDD1
R337
NP
IC11
6
2
VEE1
3
GND
GND
AD8671
GND
C363
NP
R338
NP
3
C362
NP
10%
X5R
GND
VDD1
GND
C35
22n
10%
VEE1
GND
C36
22n
10%
VEE1
NP
VEE1
VEE1
ATTOUT 2
AD8671
IC112 GND
6
2
R339
NP
Sheet 6
IC5,13
IC10
6
2
10K
+ C365
NP
20%
R51
3K92
1K
VDD1
10K
VEE1
GND
SW1/C
SW2/C
SW3/C
SW4/C
VDD1
VEE1
7
IC16B
7
5
R32
7
R61
4K75
4
GND
AD8672
R45
GND
7
VEE1
IC16A
1
3
VDD1
-20dB
4
82K5
C60
1n
GND
1%
NP0
C69
1n
1%
NP0
6
8
21K
R53
1K5
8
AD8672
R39
C48
22n
10%
X7R
VDD1
C57
22n
10%
4
GND
C61
22n
10%
VDD1
VDD
VEE
DGND
AGND
AGND
AGND
AGND
SSM2404
2
GND
C73
22n
10%
GND
R47
-15dB
GND
C46
22n
10%
6
GND
3
IC17A
1
C49
100p
1%
NP0
2
VDD1
MP5
5
VEE1 VDD1
VDD = +5V
GND = 0V
VDD1 = +11V
VEE1 = -11V
VEE2 = -17V to -22V
Vref1 = +2.5V
Vref_pmp = +5.0V
Vref_pmp = -5.0V
IC14
-5dB
4
30K1
C53
10n
GND
1%
NP0
8
5K36
R46
21K
4
R54
4K99
AD8672
Power Supply
GND
o[0..27]
o4
o5
o6
o7
AD8672
VDD1
4
8
R67
10K
4
5
Vref1
R41
R334
NP
N6
IC23B
7
6
CH2 LPF Out
IC34
Sheet 4
VEE1
N6
+t°
o[0..27]
VDD1
R40
GND
C11
22n
10%
R52 1K
N5
IC23A
1
GND
C2
22n
10%
VEE1
VDD1
4K99
IC17B
7
VDD1
1u 10%
X7R
N5
22K6
12KHz LPF
6
AD8671
GND
VEE1
VDD1
R74
ATTOUT 1
NP
C357
NP
10%
X5R
VEE1
IC5,4
6
IC111 GND
6
2
R333
NP
AD8671
Sheet 6
IC2
R57
Att. Control
1%
1K
2
VDD1
-10dB
CH2 OUT
100p
NP0
R8
VEE1
C50
100p
1%
NP0
2
MP1
C1
7
NP 10%
X5R
3
VEE1
R42
5K36
18
NC
3
6
VEE1
GND
R66
10K
8
SW4/I SW4/O
GND
GND
Sheet 4
IC27,12
SW3/I SW3/O
20
R330
NP
IC6
2
R174
243K
GND
CAT5401-25
R65
10
VEE1
VDD1
R329
NP
8
N2
N3
3
C16
22n
10%
4
12
WP
A0
A1
SW2/I SW2/O
C37
4u7
10%
X5R
8
VDD
Test point
R25
VDD1
4
VDD
GND
GND
24
14
2
2K21
+ C360
NP
20%
GND
CS
SCK
SI
SO
13
GND
10K
R9
3K92
IC85
CS POT2
CLK1
COMDATA
R3
22p 5%
NP0
R13
C12
22n
10%
IC53,38
IC53,14
IC53,15
SW1/I SW1/O
1
GND
C3
22n
10%
GND
10K
GND
23
11
1
13
VEE1
7
GND
5
R15
GND
-20dB
4
GND
82K5
C43
1n
GND
1%
NP0
R5
VDD1
C39
22n
10%
4
GND
21K
IC8B
7
C18
1n
1%
NP0
2
2
VDD1
GND
VEE1
C41
C33
22n
22n
10%
10%
AD8672
R30
R6
1K5
6
R31
4K99
3
R16
VDD1
5
C8
10n
1%
NP0
IC9A
1
C32
100p
1%
NP0
6
8
5K36
R29
21K
8
AD8672
R10 30K1
-15dB
GND
C27
22n
10%
C4
22n
10%
4
R37
10K
R11
4
5
Vref1
IC9B
7
11
SW1/C
SW2/C
SW3/C
SW4/C
VDD1
VEE1
SSM2404
VDD1
4
6
C7
100p
1%
NP0
2
4
8
R36
10K
VDD1
MP2
R7
5K36
17
14
4
2
9
12
19
7
12KHz LPF
VDD1
CH1 OUT
1K1
7
GND
Sheet 4
IC27,15
VDD1
VDD
VEE
DGND
AGND
AGND
AGND
AGND
15
5
6
16
VEE1
GND
R35
ATT1.0
ATT1.1
ATT1.2
ATT1.3
R24
0dB
AD8672
4
MP7
o0
o1
o2
o3
8
RW1
ATTDC1
IC26,14
Sheet 4
Vref att
4
R12 1K
N3
VDD1
GND
8
6
+ C98
10u
20%
1%
1u 10%
X7R
VDD1
R44
IC22B
7
43K2
POT SYM
IC85
VEE1
MP4
VDD1
5
100p
NP0
C17
RH0
Vref att
GND
4
VDD1
VEE1
Vref_dac
IC22,1
R23
Att. Control
MP6
4
2
+ C95
10u
20%
Vref1
IC22A
1
3
Vref_source
IC27,11
4
VEE1
8
GND
C80
22n
10%
8
C94
22n
10%
4
VDD1
C364
NP
R340
NP
Date
Constr.
GND
GND
Constr.
Appr.
300501
AMJ
HBJ
Sheet
Revision 021008
PSC
OG
5 of 7
Title
Mainboard 050/051/052/053
Partno.
69010807
Drawingno.
NP = Not Present
D02000307 050 051 052
AT235 Service manual page 35
V_rel
R19
470 1 RL1
R341
5
L. PHONE on/off
2
3
VDD1*
15K4
S1_CTRL
4
S1_IN
3
5
8
9
10
12
14
+20dB CH2
15
13
ATTOUT 2
IC10,6
Sheet 5
1K69
NC
NC
NC
NC
NC
NC
NC
VDD1
16
VDD1
GND
1
GND
7
VEE1
15
5
6
16
VEE1
11
SSM2402
R27
R26
GND
10
SW3/I SW3/O
8
SW4/I SW4/O
18
NC
+20dB
C14
22n
10%
C13
220n
10%
X7R
GND
VDD1*
GND
CH2 L/R
2
T2
MJD127
GND
C26
22n
10%
GND
R50
V_rel
R344
470
V_rel
C55
7
C54
100p
NP0
1%
22p
NP0
5%
C29
220n
10%
X7R
IC12
6
3
VDD1*
R49
GND
100
GND
V_rel
T4
MJD127
3
1
470
VEE1*
GND
5
R346
470
1
L. INSMASK on/off
2
3
10K
10K
10K
10K
10K
10K
10K
10K
10K
C86 VDD
22n
R75
o17
C85
22n
R347
470
1
RL6
6
GND
SW2
SW4
10K
10K
10K
ATT3.1
ATT3.0
ATT4.2
ATT4.1
ATT4.0
IC53,15 COMDATA
IC53,11
CLK2
R250
R249
R248
2
VSS
VDD
BC
22
21
NC
NC
OUT17
OUT16
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT09
NC
OUT08
OUT07
OUT06
OUT05
OUT04
OUT03
OUT02
OUT01
1
23
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
5451V
GND
RL7
6
2
3
GND
4
R349
470
IPSI on/off
1
RL8
RC1
2K
R348
4
2
470
o19
CONTRA on/off
IPSI
1
RC2,3
4
3
AQY212S
V_rel
ATT2.3
ATT2.2
ATT2.1
ATT2.0
ATT1.3
ATT1.2
ATT1.1
ATT1.0
RL9
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
2
10%
X7R
+20dB CH2
TONE'
L. FF2 on/off
L. FF1 on/off
L. BONE on/off
L. INSMASK on/off
PROBE on/off
L. PHONE on/off
+20dB CH1
o8
LEFT PHONE
RIGHT PHONE
CONTRA/MASKING
BONE
FREE FIELD 1
FREE FIELD 2
INSERT MASKING
o16
o15
o14
o13
o12
o11
o10
o9
o20
R350
470
1
RL10
6
GND
DIP16
Output
5
R. BONE on/off
2
3
4
AQV252G
V_rel
o21
R351
470
1
RL11
6
5
R. FF1 on/off
2
3
4
NP
o7
o6
o5
o4
o3
o2
o1
o0
V_rel
o22
R352
470
1
RL12
Test point
R281
470
6
RC1,16
RC1,15
RC1,14
RC1,13
RC1,12
RC1,11
RC1,10
5
R. FF2 on/off
2
3
4
GND
NP
V_rel
R77
R78
R81
R84
R85
R86
R87
R88
R353
470
R. INSMASK on/off
1
RL13
R282
470
6
LEFT PHONE
RIGHT PHONE
CONTRA/MASKING
BONE
FREE FIELD 1
FREE FIELD 2
INSERT MASKING
RC1,1
4
TP78
TP79
TP80
TP81
TP82
TP83
TP84
GND
5
2
3
TP85
GND
NP
Power Supply
Analog Control Bus
VDD
o[0..27]
R289
470
VDD
o23
VDD
IPSI RL8,3
4
5
R. PHONE on/off
10K
10K
10K
10K
10K
10K
10K
10K
10K
R83
R92
R99
R161
R165
R179
R186
R55
R56
V_rel
IC24
o26
o27
10K
4
5
VEE1*
10%
X7R
10K
6
AQV252G
GND
R247
RL5
3
CH1 L/R
CH2 L/R
R378
470
4
AQY212S
IC32.9 ATT3.2
R372
470
6
R286
470
o18
OUT18
OUT19
OUT20
OUT21
OUT22
OUT23
OUT24
OUT25
OUT26
OUT27
NC
OUT28
OUT29
OUT30
OUT31
OUT32
OUT33
OUT34
OUT35
DATA
CLK
R382
470
GND
RL4
2
3
VDD
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
R381
470
NP
V_rel
C62
22n
10%
1
R48
10
VEE1*
GND
R345
C51
220n
10%
X7R
C30
220n
10%
X7R
AD8671
4
GND
C44
22n
10%
SW2
R. PHONE on/off
IPSI on/off
CONTRA on/off
R. BONE on/off
R. FF1 on/off
R. FF2 on/off
R. INSMASK on/off
R380
470
NP
o[0..27]
o17
o18
o19
o20
o21
o22
o23
R379
470
4
2
3
L. FF2 on/off
MJD122
T3
V_rel
IC32.10
IC32.11
IC38.9
IC38.10
IC38.11
6
5
L. FF1 on/off
VDD1*
NP
o24
o25
RL3
2
3
4K22
R58
GND
1
PROBE TONE RL2,3
RC2,12
Sheet 3
NP
SW4
o26
PROBE TONE
AQV252G
Output Amplifier
GND
IC18
NC7ST04
4
4
5
L. BONE on/off
R17
10
7
5
2
470
GND
VDD
CH1 L/R
R343
VEE1*
2
o27
GND
o24
V_rel
o12
GND
NP
C70
22n
10%
C23
220n
10%
X7R
VEE1*
C10
22n
10%
RL2
2
VEE1*
R62
VDD
1
3
C9
220n
10%
X7R
AD8671
VDD
IC19
NC7ST04
4
470
PROBE on/off
GND
6
3
VDD1*
VEE1
R342
AQY212S
100
IC1
2
GND
VDD1
VEE1
V_rel
GND
R18
SSM2404
R246
o25
SW2/I SW2/O
3
1K69
5
GND
SW1/I SW1/O
MJD122
T1
VDD1*
C64
22n
10%
10K
C20
22n
10%
17
14
4
2
9
12
19
1
20
R245
VDD1
15K4
SW1/C
SW2/C
SW3/C
SW4/C
VDD
VEE
DGND
AGND
AGND
AGND
AGND
13
11
S2_OUT
5%
IC13
S2_CTRL
S2_IN
22p
NP0
VEE1
C63
22n
10%
GND
3
o16
R21
6
S1_OUT
C24
4
AQV252G
R89
R63
R80
R189
R192
R213
R218
R79
R70
ATTOUT 1
IC2,6
Sheet 5
VDD1
2
1%
10K
10K
10K
10K
10K
10K
10K
10K
+20dB CH1
100p
NP0
7
IC5
o8
C25
4
R20
6
4K22
VDD = +5V
GND = 0V
VDD1 = +11V
VEE1 = -11V
VEE2 = -17V to -22V
Vref1 = +2.5V
Vref_pmp = +5.0V
Vref_pmp = -5.0V
o[0..27]
Output Relays
VDD
F1
2SJ317
V_rel
Date
IC108,4 RESET§
Constr.
Appr.
Constr.
300501
AMJ
HBJ
Sheet
Revision
021008
PSC
OG
6 of 7
Title
Mainboard 050/051/052/053
Partno.
69010807
Drawingno.
NP = Not Present
D02000307 050 051 052
AT235 Service manual page 36
UART_RxD
27
NC5
V6
IC104A
MAX4760
4
34
COM2
BDBUS6_PRG IC99,33
TxDA IC104F,30
d1
3
NC2
IC53,8
IC103B,34
CO26,16
24
30
Select
TxDA
NC3
7
BDBUS6_PRG
IC99,33
IC53,8
IC103C,12
d2
CO26,15
Select
CTSA#
22
16
UART_CTS
21
COM6
NC4
9
BDBUS6_PRG
FLASH_CE#
IC99,33
IC48,60
CTS0 IC54,102
NC7
VDD
BDBUS6_PRG IC99,33
RTSA# IC104H,15
IC53,8
IC103D,13
d3
CO26,17
22
15
Select
RTSA#
IND
NO8
18
COM8
19
UART_RST
RTS0 IC54,105
NC8
MAX4760
VDD
IC104I
C337 11
100n 14
10% 17
X7R
MAX4760
V+
NC
NC
NC
24
30
INC
NO6
BDBUS6_PRG
R300
25 d5
COM6
NC6
GND
IC99,33
10K
GND
23
NC
NC
NC
29
32
35
4
34
3
1
BDBUS7
IC99,32
BCBUS0_CS#
IC99,30
C339
100n
10%
IC106
NC7SZ32
2
6
12
7
R371
GND
IC55,9
INA
NO2
GND
2
COM2
R369
GND
NC2
IC55,8
INB
NO3
R370
DTR
18K2
FLASH_CE#x IC83,26
NC3
12
GND
4
GND
11
IC113D
74HCT08
13
VDD
VDD
VDD1
5
R375
GND
22K6
IC104D
BDBUS6_PRG
6
13
INB
NO4
FLASH_RY/BY#
9
NC4
1
IC114A
74HCT08
3
IC55,11 PA4
GND
2
R374
GND
10
COM4
IC104H,19
FLASH_RY/BY#x IC83,15
20pol
R356
18K2
GND
R355
22K6
GND
MAX4760
IC103G
NC7
IC99,33
VDD
MAX4760
NC8
VDD
MAX4760
VDD
IC103I
V+
GND
23
C338 11
100n 14
10% 17
NC
NC
NC
NC
NC
NC
29
32
35
AREA
AREA
5
GND
IC99,33
BDBUS6_PRG
BCBUS1_ALE
IC99,29
5
IC99,29
BCBUS1_ALE
+ C336
10u
20%
R297
470
C330
100n
10%
X7R
GND
27
27
7
C328
NP
5%
NP0
R294
C326
47p
5%
NP0
GND
1K5
RESET#
IC49,5
X4
6MHz
GND
C325
47p
5%
NP0
IC102
CS
CLK
DI
DO
1
2
3
4
GND
R292
R293
RSTOUT
C322
100n
10%
VDD
3
4
7
8
13
14
17
18
IC99,33
BDBUS6_PRG
GND
4
1
11
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
5
6
9
12
15
16
19
OE VDD
LE GND
20
10
D0
D1
D2
D3
D4
D5
D6
D7
a8
a9
a10
a11
a12
a13
a14
a15
C323
100n
10%
74HC373
3
GND
XTIN
44
XTOUT
EECS
EESK
EEDATA
TEST
29
31
33
35
38
40
42
44
30
32
34
36
39
41
43
45
NC
14
VCC
37
15
13
IC48,60
FLASH_CE#x
26
CE
IC104A,1
FLASH_OE#
28
OE
IC104B,3
FLASH_WE#
11
WE
IC99,33
BDBUS6_PRG
47
BYTE
GND
27
IC49,5
RESET#
12
RESET
GND
46
VDD
GND
A0
I/O0
A1
I/O1
A2
I/O2
A3
I/O3
A4
I/O4
A5
I/O5
A6
I/O6
A7
I/O7
A8
I/O8
A9
I/O9
A10
I/O10
A11
I/O11
A12
I/O12
A13
I/O13
A14
I/O14
A15 I/O15/A-1
A16
A17
A18
RY/BY
NC
NC
NC
14
20
10
25
24
23
22
21
20
19
18
8
7
6
5
4
3
2
1
48
17
16
9
10
d0
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10
d11
d12
d13
d14
d15
R283
R376
GND
9
UART_TxD
IC104F,25
10
FLASH_RY/BY#x IC104D,10
10K
VDD
R357
IC113C
74HCT08
8
1K82
2K21
VDD
VDD
C369
100n
C304
100n
10%
X7R
12
IC114D
74HCT08
13
GND
11
GND
GND
GND
GND
GND
GND
GND
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
24
23
22
21
20
19
17
16
ACBUS0
ACBUS1
ACBUS2
ACBUS3
SI/WUA
15
13
12
11
10
BDBUS0
BDBUS1
BDBUS2
BDBUS3
BDBUS4
BDBUS5
BDBUS6
BDBUS7
40
39
38
37
36
35
33
32
BCBUS0
BCBUS1
BCBUS2
BCBUS3
SI/WUB
30
29
28
27
26
PWREN
41
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
IC103A,36
IC103B,2
IC103C,8
IC103D,10
IC103E,28
IC103F,26
IC103G,20
IC103H,18
FLASH_RY/BY#
R315
10K
cvdd[0..7]
R301
10K
VDD
R304
R305
R306
R307
4K75
4K75
4K75
4K75
a16
a17
a18
a19
BCBUS0_CS#
BCBUS1_ALE
BCBUS2_RD#
BCBUS3_WR#
R302
10K
a[1..23]
R309
VDD
dsp vdd[1..6]
25
49
61
85
97
121
R308
R314
R313
133
C201 C203 C205 C207 C202 C197 C190 C191
100n
100n
100n
GND
100n
GND
100n
GND
100n
GND
100n
GND
100n
GND
100n
GND
GND
100n
GND
100n
GND
100n
GND
100n
GND
100n
GND
100n
GND
100n
2
R288
2K21
10K
10K
10K
VDD
VDD
VDD
NP
N1
C214 100n
N7
C269 NP
N8
C271 100n
N9
3
+ C308
100u
20%
1
R287
3M3
GND
GND
6 x BLM18PG121SN1D
L9
L8
L5
L3
L6
L4 18
dsp vdd6
dsp vdd5
dsp vdd4
dsp vdd3
dsp vdd2
dsp vdd1
59
15
36
67
90
VDD
C307
1u
10%
X7R
GND
dsp vdd[1..6]
IC42
BCBUS1_ALE
BCBUS2_RD#
BCBUS3_WR#
C15
VCPU F4
ZXM64P035G
TP107
10K
N4
TP108
MC68306 IC54 Sheet 1
BDBUS6_PRG
VDD
GND
C233 C239 C240 C241 C242 C243 C244 C245
GND
BDBUS6_PRG
BDBUS6_PRG
BDBUS7
8 x BLM18PG121SN1D
L14
L13
L16
L18
L20
L21
L19
L17
13
cvdd7
cvdd6
cvdd5
cvdd4
cvdd3
cvdd2
cvdd1
cvdd0
IC104D,9
a[1..23]
100n
cvdd[0..7]
IC54
VDD
C19
GND
AM29F800B
VDD
Date
Power Supply
VDD = +5V
GND = 0V
VDD1 = +11V
VEE1 = -11V
VEE2 = -17V to -22V
Vref1 = +2.5V
Vref_pmp = +5.0V
Vref_pmp = -5.0V
Constr.
Appr.
C210 C215 C217 C218 C220 C224
C120 C116 C128 C121 C155 C167
Constr.
300501
AMJ
HBJ
Sheet
100n
100n
Revision 021008
PSC
OG
7 of 7
FT2232C
100n
100n
100n
100n
100n
100n
100n
100n
100n
100n
Title
GND
2
22K6
R358
GND
10K
2K21
1
IC113A
74HCT08
3
UART_CTS
IC104G,21
IC99
RESET
43
47
93C46
GND
USBDP
AGND
C324
1u
10%
X7R
VDD
NC
NC
GND
4
48
1
2
VDD
8
7
6
5
5
USBDM
GND
GND
GND
GND
C327
NP
5%
NP0
R296
R295
3V3OUT
9
18
25
34
GND
4pol
C329 6
47n
10%
8
GND
45
1
2
3
4
GND
IC53,9
USB+5V
43K2
0
0
OE VDD
LE GND
a1
a2
a3
a4
a5
a6
a7
a8
a9
a10
a11
a12
a13
a14
a15
a16
a17
a18
a19
C333 4n7
10%
GND
USB+5V
C340
100n
10%
IC107
NC7SZ08
2
C332 47n
10%
3
42
14
31
C335
100n
10%
X7R
1
BDBUS7
IC99,32
C331 100n
10%
VCC
VCC
VCCIOA
VCCIOB
C334
22n
10%
X7R
L33
BLM18PG121SN1D
46
L34
BLM18PG121SN1D
AVCC
VDD
L29
L30
L31
L32
0
1
11
74HC373
d0
d1
d2
d3
d4
d5
d6
d7
VDD
TP106
CO25
2
5
6
9
12
15
16
19
GND
MAX4760
R303
1M
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
IC98
GND
TP105
D0
D1
D2
D3
D4
D5
D6
D7
7
COM8
10K
3
4
7
8
13
14
17
18
14
R298
19 d7
IC99,33
7
18
BDBUS6_PRG
22K6
IC83
d15
a1
a2
a3
a4
a5
a6
a7
14
ADBUS7
IC99,16
22
15
d0
d1
d2
d3
d4
d5
d6
d7
R373
GND
IC97
IC103H
IND
NO8
5
a[1..23]
10K
7
IC99,17
BDBUS6_PRG
R299
21 d6
COM7
4
IC113B
74HCT08
6
UART_RxD
7
22
16
IND
NO7
20
IC104E,27
d[0..15]
d[0..15]
a[1..23]
ADBUS6
Blue
Tooth
22K6
UART_RST
MAX4760
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
4
IC114B
74HCT08
6
IC55,14 PA3
C368
100n
GND
IC99,13
CO26
GND
GND
22K6
VDD
8
COM3
GND
IC99,33
22K6
RS232
FLASH_WE# IC83,11
MAX4760
MAX4760
AREA
IC103F
+3.3V
10
14
NC5
27 d4
5
BDBUS6_PRG IC99,33
CTSA# IC104G,16
AREA
INC
NO5
24
31
COM5
26
20
COM7
5
6
13
X7R
MAX4760
MAX4760
MAX4760
ADBUS5
IC99,19
BCBUS3_WR#
IC99,27
IC104H
COM4
28
NC1
+ C367
10u
20%
IC104C
IND
NO7
IC103E
ADBUS4
IC99,20
IC99,33 BDBUS6_PRG
IC54,22
c2
TxD0 IC54,99
NC6
MAX4760
INB
NO4
C366
100n
10%
FLASH_OE# IC83,28
9
IC114C
74HCT08
8
IC55,15 PA2
14
6
12
IC103D
ADBUS3
IC99,21
26
MAX4760
INB
NO3
36
COM1
IC104G
COM3
10
1
INA
NO1
LD1117S
2
VOUT
IC104B
MAX4760
8
BCBUS2_RD#
IC99,28
4
33
VIN
MAX4760
INC
NO6
25
UART_TxD
IC103C
ADBUS2
IC99,22
BDBUS6_PRG
dr3
IC104F
INA
NO2
2
RxD0 IC54,98
MAX4760
IC103B
ADBUS1
IC99,23
28
COM5
IC99,33
IC54,16
3
7
CO26,18
INC
NO5
14
d0
24
31
7
1
Select
RxDA
7
NC1
COM1
IC53,8
IC103A,33
BDBUS6_PRG IC99,33
RxDA IC104E,31
14
36
4
33
3
ADBUS0
IC99,24
IC104E
INA
NO1
NP
VDD
7
IC103A
VDD
GND
10K
1
R377
Select
14
R354
d[0..15]
d[0..15]
GND
GND
GND
GND
GND
GND
GND
DSP-2186 IC42 Sheet 4
GND
GND
GND
GND
Mainboard 050/051/052/053
Partno.
GND
69010807
Drawingno.
NP = Not Present
D02000307 050 051 052
AT235 Service manual page 37
Components Index
AT235 Service manual page 38
Main board Part List
PCB 69010807 Assembled Board PCA 51007410
PCS Part ref.
Part No.
17
C1 C7 C25 C32 C34 C42 C49 C50
C55 C84 C88 C106 C117 C124 C140
C141 C288
61400201 100p 1% 50V 0603
Capacitor ceramic NP0
92
C2 C3 C4 C10 C11 C12 C14 C16 C20
C22 C26 C27 C28 C31 C33 C35 C36
C39 C40 C41 C44 C45 C46 C48 C52
C56 C57 C59 C61 C62 C63 C64 C65
C68 C70 C73 C74 C80 C81 C85 C86
C92 C94 C96 C127 C131 C136 C143
C144 C150 C154 C156 C161 C163
C166 C168 C171 C172 C178 C182
C184 C186 C187 C194 C198 C199
C206 C208 C209 C211 C213 C216
C219 C222 C223 C225 C226 C228
C229 C232 C236 C249 C251 C252
C256 C258 C273 C312 C314 C315
C334 C378
61400101 22n 10% 25V 0603
Capacitor ceramic X7R
12
C5 C17 C67 C72 C160 C170 C274
C305 C306 C307 C324 C355
C6 C8 C53 C58
C9 C13 C23 C29 C30 C51 C75 C91
C93 C125 C147 C193 C291 C296
C297 C298 C299 C353
61401601 1u 10% 16V 0805
Capacitor ceramic X7R
61401701 10n 1% 25V 1206
61414301 220n 10% 25V 0805
Capacitor ceramic NP0
Capacitor ceramic X7R
61401801 1n 1% 50V 0805
61401102 100n 10% 16V 0603
Capacitor ceramic NP0
Capacitor ceramic X7R
61400501 22p 5% 50V 0603
Capacitor ceramic NP0
61413001 4u7 10% 16V 1206
61401501 470p 5% 50V 0603
61003301 10u 20% 16V Ø3x5.5
Capacitor ceramic X5R
Capacitor ceramic C0G
Capacitor lyt Standard
105ºC
5
C18 C43 C60 C69 C247 C294 C295
C19 C89 C90 C99 C112 C116 C120
C121 C123 C128 C138 C139 C155
C164 C167 C181 C188 C190 C191
C192 C197 C201 C202 C203 C205
C207 C210 C214 C215 C217 C218
C220 C221 C224 C231 C233 C238
C239 C240 C241 C242 C243 C244
C245 C246 C253 C255 C257 C270
C271 C272 C292 C300 C302 C303
C304 C322 C323 C330 C331 C335
C337 C338 C339 C340 C341 C343
C344 C347 C348 C366 C368 C369
C370 C371 C372 C373 C374 C379
C380 C381 C382 C384
C21 C24 C47 C54 C104 C105 C137
C151 C227 C230
C37 C71 C318 C319
C77 C83
C78 C79 C87 C95 C97 C98 C100
C103 C111 C180 C183 C293 C336
C367
C122 C132 C173 C235 C301
61004101 47u 20% 16V Ø6.3x5.2
1
C152.
1
C174.
4
C179 C308 C349 C350
61004301 1000u 20% 10V
Ø10.0x10.0
61004001 2200u 20% 6.3V
Ø12.5X13.5
61003101 100u 20% 35V Ø6.3x8
2
C185 C196
61003201 220u 20% 16V Ø10x10
Capacitor lyt Low
Impedance
Capacitor lyt Standard
85ºC
Capacitor lyt Low
Impedance
Capacitor lyt Standard
85ºC
Capacitor lyt Standard
105ºC
4
18
7
83
10
4
2
14
Desciption
Description 2
AT235 Service manual page 39
PCS Part ref.
Part No.
Desciption
Description 2
2
C234 C237
61202001 4u7 20% 25V Package C
Capacitor tantal
2
C265 C354
2
3
2
2
C325 C326
C329 C332 C351
C333 C352
CO9 CO15
1
CO16.
3
CO20 CO21 CO25
1
CO26.
61004201 1000u 20% 16V
Ø12.5x13.5
61407901 47p 5% 50V 0603
61415201 47n 10% 16V 0603
61415001 4n7 5%/10% 50V 0603
65002901 24Pol FFC/FPC Conn.
SMT PCB
65000501 12Pol FFC/FPC Conn.
SMT PCB
65006001 4Pol Picoflex Male SMT
PCB
65000101 20Pol SEI-Connector
4
3
D14 D15 D18 D31
D21 D32 D33
61700501 6.2V 0.5W Minimelf
61700301 SL23 30V 2.0A DO214AA
Capacitor lyt Low
Impedance
Capacitor ceramic NP0
Capacitor ceramic X7R
Capacitor ceramic X7R
Right angle 0.5mm Bottom
Cont.
Right angle 1.0mm Top
Cont.
Conn. 1.27mm REEL/CAP
MOLEX
Conn. SMD 1mm
SAMTEC onTape
Zener diode Philips
Schottky diode Vishay
6
1
D22 D23 D24 D25 D28 D29
D34.
61700601 3.3V 0.5W Minimelf
61705501 SMBJ5.0A 5V DO214AA
1
D43.
1
D46.
1
F1.
2
F3 F4
61704301 BAS40-05 40V 120mA
SOT23
61711501 MBRD835LG 35V 8A
TO252AA
64602901 2SJ317 MOSFET P-Ch.
SOT89
64601001 ZXM64P035G MOSFET
P-Ch. SOT223
1
F5.
8
IC1 IC2 IC6 IC10 IC11 IC12 IC25 IC29
2
IC103 IC104
64608501 IRFR9024N MOSFETT PCh. TO252
62034901 AD8671ARMZ-REEL
MSOP8
62047001 MAX4760ETX QFN36
3
IC113 IC114 IC52
62049801 74HCT08PW TSSOP14
9
3
2
IC16 IC17 IC20 IC22 IC23 IC31 IC7
IC8 IC9
IC3 IC13 IC14
IC4 IC15
62035001 AD8672ARMZ-REEL
MSOP8
62001201 SSM2404S SO20
62001101 THAT2181SB SO8 reel
1
6
IC5.
IC18 IC19 IC93 IC95 IC96 IC110
62002101 SSM2402S SOL16
62004601 NC7ST04M5X SOT23-5
1
IC21.
62007001 REF02CS SO8
1
IC24.
62010601 MM5451YV PLCC44
1
1
1
IC26.
IC27.
IC36.
62001001
62000801
62006401
2
IC37 IC51
62000901
Zener diode Vishay
TransZorb diode 600W
Vishay
Schottky diode
Catode/Catode
Schottky diode Motorola
Transistor -12V 0.4R
RENESAS
Transistor -40V 0.060R
ZETEX
Transistor -55V 0.175R
IRF
IC Op-Amp. Analog
Devices
IC Quad DPDT Switches
MAXIM
IC AND-Gate PHILIPS
IC Op-Amp. Dual Analog
Devices
IC Audio Switch AD
IC Voltage Controlled
Amp.
IC Audio Switch AD
IC Single HST Inverter
Fair.
IC Ref./Temp. Transducer
IC LED Display Driver
Micrel
AD7249ARZ SOL16
IC D/A Converter AD
PCM3001E SSOP28
IC CODEC Burr Brown
AD820AR SO8
IC Op-Amp. Analog
Devices
MM74HC4040M SO16
IC Binary Ripple counter
Fairc
AT235 Service manual page 40
PCS Part ref.
Part No.
Desciption
1
1
IC41.
IC42.
1
IC47.
62007901 AD7896AR SO8
62009801 ADSP-2186KST-133
QFP100
62018001 AD822AR SO8
1
IC48.
1
IC49.
1
IC50.
3
IC53 IC55 IC60
1
IC54.
2
Description 2
62011401 XC9572-15PQ100C
QFP100
62001401 TL7705ACD1/A SO8
63201701 14.7456MHz SG-615P
14.0x9.8mm
62010101 Z84C2008VEG PLCC44
IC A/D Converter
IC DSP Microcomputers
AD
IC RailToRail FET OpAmp. Dual
IC Programmable CPLD
Xilinx
IC Suplly Voltage
Supervisor
Crystal Oscillator 5V
EPSON
IC Z80 PIO Zilog
IC CPU Motorola
IC57 IC65
62010201 MC68306AG16B
TQFP144
62002401 LM6142BIM SO8
1
IC58.
62008701 AD8402AR100 SO14
1
IC62.
62011001 YGV610B QFP100
IC Digital Potentiometers
AD
IC CPD Controller Yamaha
1
IC64.
62001701 74HC138D SO16
2
IC66 IC72
3
IC67 IC100 IC107
62008901 K4F151611D-JC60 SOJ42P
62004801 NC7SZ08M5 SOT23-5
1
IC71.
62007201 MAX749CSA SO8
1
IC76.
62011801 HN58V65AFP-10 FD28D
1
1
IC77.
IC83.
1
IC85.
62035801 A3977SLP-T TSSOP28
62048201 AM29F800BT-55ED
TSOP48
62045201 CAT5401YI-25 TSSOP24
3
IC88 IC89 IC90
62045301 NC7SZ86P5X SC70/5
2
IC97 IC98
62014201 74HC373D SO20
1
IC99.
62046901 FT2232D LQFP48
1
IC102.
2
IC106 IC108
62030101 AT93C46-10TU-2.7
TSSOP8
62004701 NC7SZ32M5 SOT23-3
22
L1 L3 L4 L5 L6 L7 L8 L9 L11 L13 L14
63704601 BLM18PG121SN1D 120R
L16 L17 L18 L19 L20 L21 L22 L23 L25
±25 0603
L33 L34
Inductor 2A 0.05R
MURATA
1
L24.
63800701 NFW31SP506X1E4L
1
L26.
1
L27.
63701001 CD54-330LC 33uH 15%
Ø5.8x5.2
63700901 CD54-221KC 220uH 10%
Ø5.8x5.2
Filter Chip
50Hz/200mA/25V
Coil 880mA 0.23R
IC Dual OP-Amp. National
IC Line
Decoder/Demultiplexer
IC 1Mx16Bit DRAM 60nS
+5V Sam.
IC Single UHS AND-Gate
IC LCD Bias Supply
MAXIM
IC EEPROM
IC Microstepping Driver
IC 5Volt Flash Memory
AMD
IC 4 x Dig. Program. Potmeter
IC Sing. UHS ExclusiveOR-Gate
IC Transparent Latch
PHILIPS
IC Dual USB UART / FIFI
FTDI
IC EEprom 2.7V - 5.5V
ATMEL
IC Single UHS OR-Gate
Coil 350mA 1.57R
SUMIDA
AT235 Service manual page 41
PCS Part ref.
Part No.
1
L28.
1
2
3
11
L29.
R23 R57
L30 L31 L32
R109 R130 R131 R133 R204 R208
R252 R254 R323 R359 R360
L35.
63705801 IDC-5020 100uH 20%
12.95x9.4mm
60429301 43K2 1% 0.1W 0603
60429301 43K2 1% 0.1W 0603
60400102 0R 0.1W 0603
60400102 0R 0.1W 0603
Inductor 0.28R 1.3A
VISHAY
Resistor
Resistor
Resistor
Resistor
63705701 SCBB1207-100E 10uH
1
12
2
2
9
89
8
4
13
2
6
3
6
4
3
2
4
2
2
2
24
2
4
12
2
4
11
Desciption
Description 2
MP1 MP2 MP3 MP4 MP5 MP6 MP7
MP8 MP9 MP10 MP12 MP13
R1 R33
R2 R32
R3 R34 R134 R168 R170 R288 R292
R310 R358
R4 R13 R36 R37 R43 R55 R56 R63
R64 R66 R67 R69 R70 R72 R77 R78
R79 R80 R81 R82 R83 R84 R85 R86
R87 R88 R89 R92 R95 R99 R102
R108 R112 R137 R142 R144 R145
R153 R156 R157 R159 R161 R165
R166 R171 R172 R179 R181 R184
R186 R189 R190 R192 R194 R195
R213 R218 R221 R222 R223 R224
R233 R234 R245 R246 R247 R248
R249 R250 R266 R267 R272 R273
R283 R290 R293 R298 R299 R300
R301 R302 R308 R309 R313 R314
R315 R322 R328 R377
R5 R6 R45 R53 R143 R294 R365
R368
R7 R11 R40 R42
R8 R28 R114 R127 R136 R140 R151
R152 R163 R185 R237 R257 R259
R9 R51
R10 R41 R110 R118 R268 R269
R15 R61 R94
R16 R29 R44 R46 R47 R74
R17 R48 R279 R280
R18 R49 R199
R19 R50
R20 R26 R162 R264
R21 R27
R22 R68
R24 R59
R25 R60 R107 R115 R146 R149 R150
R155 R158 R160 R164 R169 R180
R182 R191 R196 R197 R198 R201
R219 R304 R305 R306 R307
64000101 Testpin 1206
Inductor 21.6R 5.40A
MOTOCRAFT
Testpin RCSCTE KOA
60404001 10K5 1% 0.1W 0603
60403901 13K3 1% 0.1W 0603
60403801 2K21 1% 0.1W 0603
Resistor
Resistor
Resistor
60400201 10K 1% 0.1W 0603
Resistor
60401901 1K5 1% 0.1W 0603
Resistor
60403101 5K36 1% 0.1W 0603
60403601 1K 1% 0.1W 0603
Resistor
Resistor
60403501
60403201
60402301
60400301
60401301
60401201
60424301
60424501
60424401
60421301
60403701
60401101
3K92 1% 0.1W 0603
30K1 1% 0.1W 0603
12K4 1% 0.1W 0603
21K 1% 0.1W 0603
10R 1% 0.1W 0603
100R 1% 0.1W 0603
4K22 1% 0.1W 0603
15K4 1% 0.1W 0603
1K69 1% 0.1W 0603
6K81 1% 0.1W 0603
1K1 1% 0.1W 0603
4K75 1% 0.1W 0603
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
R30 R39
R31 R35 R54 R65
R38 R73 R265 R270 R271 R355 R369
R371 R373 R374 R375 R376
R71 R367
R75 R105 R321 R366
R76 R111 R117 R202 R203 R207
R211 R212 R215 R216 R217
60400401 82K5 1% 0.1W 0603
60403001 4K99 1% 0.1W 0603
60423401 22K6 1% 0.1W 0603
Resistor
Resistor
Resistor
60402001 20K 1% 0.1W 0603
60400901 2K 1% 0.1W 0603
60402501 47K5 1% 0.1W 0603
Resistor
Resistor
Resistor
AT235 Service manual page 42
PCS Part ref.
Part No.
Desciption
Description 2
1
4
2
1
2
6
2
2
2
1
3
1
1
4
3
2
4
24
R90.
R98 R154 R235 R236
R103 R113
R104.
R120 R121
R135 R138 R139 R324 R325 R326
R148 R357
R356 R370
R174 R175
R177.
R183 R187 R193
R188.
R200.
R205 R206 R209 R210
R214 R284 R303
R258 R260
R275 R276 R277 R278
R281 R282 R286 R289 R297 R341
R342 R343 R344 R345 R346 R347
R348 R349 R350 R351 R352 R353
R372 R378 R379 R380 R381 R382
60420301
60401801
60402901
60424601
60425201
60401701
60424901
60402401
60402701
60229001
60400801
60421601
60402601
60425801
60400501
60421801
60214401
60406101
49K9 1% 0.1W 0603
200R 1% 0.1W 0603
2K49 1% 0.1W 0603
3K09 1% 0.1W 0603
82R5 1% 0.1W 0603
100K 1% 0.1W 0603
1K82 1% 0.1W 0603
18K2 1% 0.1W 0603
243K 1% 0.1W 0603
576R 1% 0.25W 1206
14K3 1% 0.1W 0603
5K62 1% 0.1W 0603
10M 1% 0.1W 0603
3R01 1% 0.1W 0603
1M 1% 0.1W 0603
2K74 1% 0.1W 0603
1R 1% 0.25W 1206
470R 1% 0.1W 0603
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor 100/300ppm
Resistor
1
1
1
2
4
R285.
R287.
R291.
R295 R296
RL1 RL3 RL7 RL10 RL
60418401
60215901
60421001
60405401
64500901
Resistor
Resistor
Resistor
Resistor
Relay PANASONIC
3
RL2 RL8 RL9
64501001
2
SI1 SI2
63600401
2
SI3 SI4
63600801
2
T1 T3
64600201
2
T2 T4
64600301
3
2
T5 T6 T7
V1 V2
64600402
64300301
1M8 1% 0.1W 0603
3M30 1% 0.25W 1206
7K87 1% 0.1W 0603
27R 1% 0.1W 0603
AQV252GAZ HE
PhotoMOS
AQY212S GU PhotoMOS
SOP4
3A 125V Subminiature
R452
1A 125V Subminiature
R452
MJD122 Darlington NPN
TO252
MJD127 DARLINGTON
PNP TO252
BC847B NPN SOT23
MC78L05ACD +5V SO8
1
V3.
64300101 MC79L05ACD -5V SO8
1
V5.
64308601
1
V6.
64301001
1
X1.
63201401
1
X2.
63201501
1
X3.
63200701
1
X4.
63202701
2
C189 C204
71004301
Relay PANASONIC
Fuse SLO-BLO Littelfuse
Fuse SLO-BLO Littelfuse
Transistor MOTOROLA
Transistor MOTOROLA
Transistor ONsemi
Voltage regulator ON-Semi
Voltage reg. 100mA
TEXAS
LT1370IR R-Package 7Pin Switching Regulator
DD Pak
LINEAR
LD1117S33TR 3.3V
Low drop Voltage reg.
SOT223
STM
12.288MHz NX1255GB
Crystal NDK
11.8x5.5mm
16.670MHz NX1255GB
Crystal NDK
11.8x5.5mm
24.576MHz NX1255GB
Crystal NDK
11.8x5.5mm
6.000MHz HC49/4H SMX Crystal C-MAC
11.4x4.9
2700u 25V Ø18x25 M7.5
Capacitor lyt radial
AT235 Service manual page 43
PCS Part ref.
Part No.
Desciption
2
CO2 CO3
75804001 3Pol Molex Male PCB
Conn. Straight with lock
1
CO7.
75808301 6Pol AMP Male PCB
1
CO13.
75805001 4Pol Conn Male PCB
1
CO14.
1
CO19.
75806001 26Pol Pin Header
W/House PCB
75808101 4Pol AMP Male PCB
Conn. Straight with lock
TYCO
Conn. Straight 3.96mm
W/Lock
Conn. Straight Dual row
2
R12 R52
2
RC1 RC2
70121901 Temperature sensor
PT1000
75801301 16Pol IC Socket PCB
Description 2
Conn. Straight with lock
TYCO
Resistor Class C
Conn. 0.3" Preci-Dip
AT235 Service manual page 44
Transducer Board Diagram
D02006401
R21
2K49
V1
1
Probe-select
Probe type
78L05
Vout
Probe logic
handheld
0
Not connected
clinical
1
R4
4K99
D2
6V2
+ C4
68u
270n
VDD1
C6
22n
7
6
3
2
Connected
8
Vin
GND
GND
GND
GND
C13
GND
GND
GND
GND
VDD1
C10
22n
8
GND
C1
15 Pin Sub-D
3
GND
1
2
IC2A
OP275
4
10n
1%
C11
R1
178K
N8
6
Probe Mic Gnd
N7
13
N11
14
N14
2
N13
12
N12
3
22n
VEE1
R2
33K2
Probe Mic
GND
R12
12K4
C12
100p
1%
R19
R13
1K
R3
8K25
0
8
GND
R20
0
R7
Vref_pmp
5
MIC
7
6
R8
16K2
4
IC2B
OP275
VEE1
100K
VDD1
BL1785
Knowles
R11
13K3
GND
R10
1K
5
TD1
SDX01D4
M6
GND
OUT-
OUT+
M7
3
2
1
M5
VEE1
3
M4
GND
1
IC1A
OP275
2
M3
GND
4
M2
+ C7
10u
C2 22n
8
8
7
6
5
4
3
2
1
GND
VDD1
GND +VS
M8
CO1
+ C8
10u
GND
Press1
N9
1
C3 22n
7pol
M1
IPSI
VEE1
GND
Probe-select
C9
R9
MP1
R5
1K
ED1913
Knowles
100p
MP2
1%
20K
R6
20K
C5
100p
1%
8
GND
Probe Tone
6
5
7
Press2
N10
8
IC1B
OP275
LED B
N2
7
IPSI
N1
11
IPSI Gnd
N3
10
Probe Tone Signal
N5
5
N4
15
N6
9
N15
4
4
VDD1
R18
49K9
R16
VDD1
2
VEE1
8
VGND
V+
C16
VL
IN
S1
D
100p
1%
VDD1
5
D1
VDD1 C14
100n
6
1
S2
LED R
R14
LED G
G
7
3
4
7
VEE1
GND
VDD1
10K
DG419
R
IC3
B
ED1913
Knowles
GND
2
LED-RGB
IC4
Remote Key
6
3
24K
SW1
R17
9K53
R15
4
LM6171
bom-AT235 standard
C15
Organization
Interacoustics A/S
Title
VEE1
AT235 Transducer
100n
GND
16K2
GND
Document Number
VEE1
xd tr 0004 00007
Remote Key
Sheet
PCB no. 66905
Date
1
of
1
Rev
May 09, 2003
PSC
Page
AT235 Service manual page 45
Components Index
Top side
xitr 0005 00006=D01007001
Bottom side
xitr 0006 00005=D01007101
AT235 Service manual page 46
Transducer Part List
PCB 69009601 ( 66905) – Assembled Board PCA 51000101 ( 66918)
Quantity Part Reference
Part
Number
45108401
61401701
61400101
61400201
61003301
61444301
61401101
61702901
2
1
5
4
2
1
2
1
A1 A2
C1
C2 C3 C6 C10 C11
C5 C9 C12 C16
C7 C8
C13
C14 C15
D1
1
1
2
8
2
15
1
1
1
1
3
2
1
2
1
1
1
1
1
1
1
1
IC3
IC4
IC1 IC2
M1 M2 M3 M4 M5 M6 M7 M8
MP1 MP2
N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 N14
N15
R1
R2
R3
R4
R5 R10 R13
R6 R9
R7
R8 R15
R11
R12
R14
R16
R17
R18
SW1
TD1
60304001
60420401
60423901
60403001
60403601
60402001
60401701
60406401
60403901
60402301
60208601
60400201
60225601
60420301
73902201
76000401
1
V1
64300301
62008201
62006001
62000701
Value
labels
10n
22n
100p
10u
270n
100n
LEDRGB
DG419
LM6171
OP275
Pad
Mp
Pad
178K
33K2
8K25
4K99
1K
20K
100K
16K2
13K3
12K4
24K
10K
9K53
49K9
KSA211
SDX01D
4
78L05
Toleranc
e
1%
10%
1%
20%
10%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
AT235 Service manual page 47
Appendix A Description of Serial Interface
General Specification
The Serial interface is designed to transmit data from the audiometer to a computer, and to control the audiometer
from a computer.
The Baud rate is 38400 B/S and the data format is 8 data bits, Even parity and one stop bit.
Installing the USB Driver on the PC
Connect the Instrument to the PC with a USB cable and turn on the instrument, the following window should
appear. The Driver is available from Windows Update if the PC is connected to the internet or it can be found on
the CD with the operation manual.
Click Next and the following window should appear.
Insert the CD, if the PC is not connected to the internet, click Next.
AT235 Appendix A page 1
When the Driver is found the following window appears:
Click Finish, the Found New Hardware Wizard now starts over again because a driver for Serial Converter B needs
to be installed, follow the directions above.
The Driver for the USB Serial Converter is now installed, to find out which COM port to use when communicating
with the instrument start the Device Manager (Click Start, My Computer -> properties, Hardware -> Device
Manager). The Port is recognized as “USB Serial Port” use the one with the lowest number.
If the COM port number is higher than it is possible to set in the PC application, it is possible to change the number
by selecting properties for the USB Serial Port, then Click Hardware and Advanced, the following window should
appear:
AT235 Appendix A page 2
Change the COM port number in the drop down box.
Communication
Serial Standard for Interacoustics A/S
Both the computer and the instrument can send out a request for information or send back requested information.
To make it easier to understand how the philosophy behind the Serial communication standard works for an
instrument and a PC the following terms will be used. The part that request information will be called a Master and
the part who will send back requested information will be called a Slave.
Master
Slave
Master/slave communication. Figure 2
Data transmission between the Master and the Slave are using the following format.
Data packet from a Master device.
Recipient
Sender
Direction
Header
Data
CRC (optional)
Data packet from a Slave device.
Recipient
Sender
Header
Data
“Recipient” and “sender” are revered for later use and can be ignored. Both the Recipient and the Sender are
consisting of two bytes each.
A data packet form a Master will always contain a Direction. This direction tells the slave if it has to store or to send
out the kind of data the header describes. The header is an indicator for the type of data and how the are
transmitted.
AT235 Appendix A page 3
Control Codes
All information’s in the transmission between a Master and a Slave are controlled by control codes (see table 1).
Code
STX
EOT
SOH
US
OK
Hex
02
04
01
1F
18
Description
Code Hex
Start of TeXt
GS
1D
End Of Transmission RS
1E
Start Of Header
SI
0F
Unit Separator
SO
0E
CRC Ok
ERR
19
Control Codes. Table 1.
Description
Group Separator
Record Separator
Shift In
Shift Out
CRC Error
A data packet from a Master will look like this with all its control codes:
STX
Recipient
US
Sender
US
Direction
SOH
Header
US
Data
US
EOT
Or with CRC check
STX Recipi
ent
US
Sen
der
US
Directi
on
SOH
Head
er
Data
US
US
CRC Value
5 digits
EOT
Direction can either be SO or SI. If It is a SO (shift out) direction the Master wants to send data into the slave and if
it is a SI (shift in) direction the Master wants to receive data.
A data packet from a Slave will look like this with all its control codes:
STX
Recipient
US
Sender
US
SOH
Header
US
Data
EOT
Note! When a Master is using a SO direction the slave will send back nothing! When the master uses CRC check,
the slave respond with OK or ERR.
Each time data is transmitted a US control code is added. Ex. 10 US 125 US .... With this construction it is always
possible to see when all bytes in a single data transmission is completed.
CRC Check
The Instrument supports CRC Check on the bytes received from the PC. If the data packet contains a CRC value
the Instrument calculates the CRC value of the bytes received and responds with OK or ERR. If the Instrument
responds with ERR, send the data packet again. The CRC value is calculated from the STX to and including the
EOT, the CRC value is added between the last US and EOT, and must always be 5 digits.
Header and Data Formats
A header consists of a control code (SOH) and 6 bytes (header). Each header tells witch kind of data that follows
and how the data format is. The following table describes the different types of headers and their data format.
Block Start Header and Block End Header
If the Master wants to send a sequence of headers, and do not want the Slave to respond on the EOT’s, the
headers is send with a Block Start in the beginning and a Block End at the end. The slave waits for the Block End,
before it processes the data. Similar when the Slave sends back data to the Master, it can pack the data headers in
between a Block Start and a Block End, to indicate when all the requested data is send.
Block Start
Header
BLST00
Description
Block Start
Format
AT235 Appendix A page 4
Block End
Header
BLEN00
Description
Block End
Format
Audiological Information
Tone Audiogram
Left Phone
Header
GTLP00
Description
Hearing Level
Format
Frequency US dB US frequency US ....
Description
Hearing Level
Format
Frequency US dB US frequency US ....
Right Phone
Header
GTRP00
Impedance Audiometry
Tympanogram
Left Ear
Header
GCLE00
Description
Tympanogram Left Ear
(Old format)
Format
Compliance US Volume US Pressure US Gradient US Press1 US
Compl1 US Press2 US compl2 US.....
GCLE01
Tympanogram Left Ear
ComplianceReal US ComplianceImg US VolumeReal
VolumeImg US Pressure US Gradient US GradientUnit
NumberOfPoints US StartPressure US StopPressure
Pumpspeed US ProbeToneFreq US Press[0] US Complreal[0]
Complimg[0] US ………………. Press[NumberOfPoints]
Complreal[NumberOfPoints] US Complimg[NumberOfPoints]
EOT
Header
GCRE00
Description
Tympanogram Right Ear
(Old format)
Format
Compliance US Volume US Pressure US Gradient US Press1 US
Compl1 US Press2 US compl2 US.....
GCRE01
Tympanogram Right Ear
ComplianceReal US ComplianceImg US VolumeReal
VolumeImg US Pressure US Gradient US GradientUnit
NumberOfPoints US StartPressure US StopPressure
Pumpspeed US ProbeToneFreq US Press[0] US Complreal[0]
Complimg[0] US ………………. Press[NumberOfPoints]
Compleal[NumberOfPoints] US Complimg[NumberOfPoints]
EOT
US
US
US
US
US
US
Right Ear
US
US
US
US
US
US
AT235 Appendix A page 5
IPSI Reflex
Left Ear
Header
GRIL00
Description
IPSI Reflex Left Ear
(Old format)
Format
Stimulus1 US dBHL1 US Pressure1 US Compl11 US Compl12
US.....US GS Stimulus2 US dBHL2 US Pressure2 US Compl21 US
Compl22 US.....
GRIL01
IPSI Reflex Left Ear
RS Frequency US Pressure US Method US NumberOfPoints US
GS
dB1
US
mS[0]
US
ml[0]
US
……….………mS[NumberOfPoints] US ml[NumberOfPoints] US
GS dB2 US <CurveData> GS until dB6 if the method is sequence
and 6 reflexes recorded.
Header
GRIR00
Description
IPSI Reflex Right Ear
(Old format)
Format
Stimulus1 US dBHL1 US Pressure1 US Compl11 US Compl12
US.....US GS Stimulus2 US dBHL2 US Pressure2 US Compl21 US
Compl22 US.....
GRIR01
IPSI Reflex Right Ear
RS Frequency US Pressure US Method US NumberOfPoints US
GS
dB1
US
mS[0]
US
ml[0]
US
……….………mS[NumberOfPoints] US ml[NumberOfPoints] US
GS dB2 US <CurveData> GS until dB6 if the method is sequence
and 6 reflexes recorded.
Right Ear
Contra Reflex
Left Ear
Header
GRCL00
Description
Contra Reflex Left Ear
(Old format)
Format
Stimulus1 US dBHL1 US Pressure1 US Compl11 US Compl12
US.....US GS Stimulus2 US dBHL2 US Pressure2 US Compl21 US
Compl22 US.....
GRCL01
Contra Reflex Left Ear
RS Frequency US Pressure US Method US NumberOfPoints US
GS
dB1
US
mS[0]
US
ml[0]
US
……….………mS[NumberOfPoints] US ml[NumberOfPoints] US
GS dB2 US <CurveData> GS until dB6 if the method is sequence
and 6 reflexes recorded.
Header
GRCR00
Description
Contra Reflex Right Ear
(Old format)
Format
Stimulus1 US dBHL1 US Pressure1 US Compl11 US Compl12
US.....US GS Stimulus2 US dBHL2 US Pressure2 US Compl21 US
Compl22 US.....
GRCR01
Contra Reflex Right Ear
RS Frequency US Pressure US Method US NumberOfPoints US
GS
dB1
US
mS[0]
US
ml[0]
US
……….………mS[NumberOfPoints] US ml[NumberOfPoints] US
GS dB2 US <CurveData> GS until dB6 if the method is sequence
and 6 reflexes recorded.
Right Ear
AT235 Appendix A page 6
Decay IPSI Reflex
Left Ear
Header
GAIL00
Description
Format
Decay IPSI Reflex Left Stimulus1 US dBHL1 US Pressure1 US Result1 US Timebase1
Ear (Old format)
US Compl11 US Compl12 US....US GS
Stimulus2 US dBHL2
US Pressure2 US Result2 US Timebase2 US Compl21 US........
GAIL01
Decay IPSI Reflex Left Frequency US Pressure US Method US NumberOfPoints US GS
Ear
dB1 US mS[0] US ml[0] US ……….………mS[NumberOfPoints] US
ml[NumberOfPoints] US GS dB2 US <CurveData> GS until dB6 if
the method is sequence and 6 reflexes recorded.
Right Ear
Header
GAIR00
Description
Format
Decay IPSI Reflex Right Stimulus1 US dBHL1 US Pressure1 US Result1 US Timebase1
Ear (Old format)
US Compl11 US Compl12 US....US GS
Stimulus2 US dBHL2
US Pressure2 US Result2 US Timebase2 US Compl21 US........
GAIR01
Decay IPSI Reflex Right Frequency US Pressure US Method US NumberOfPoints US GS
Ear
dB1 US mS[0] US ml[0] US ……….………mS[NumberOfPoints] US
ml[NumberOfPoints] US GS dB2 US <CurveData> GS until dB6 if
the method is sequence and 6 reflexes recorded.
Decay Contra Reflex
Left Ear
Header
GACL00
Description
Format
Decay Contra Reflex Left Stimulus1 US dBHL1 US Pressure1 US Result1 US Timebase1
Ear (Old format)
US Compl11 US Compl12 US....US GS
Stimulus2 US dBHL2
US Pressure2 US Result2 US Timebase2 US Compl21 US........
GACL01
Decay Contra Reflex Left Frequency US Pressure US Method US NumberOfPoints US GS
Ear
dB1 US mS[0] US ml[0] US ……….………mS[NumberOfPoints] US
ml[NumberOfPoints] US GS dB2 US <CurveData> GS until dB6 if
the method is sequence and 6 reflexes recorded.
Right Ear
Header
GACR00
Description
Decay Contra Reflex
Right Ear (Old format)
Format
Stimulus1 US dBHL1 US Pressure1 US Result1 US Timebase1
US Compl11 US Compl12 US....US GS
Stimulus2 US dBHL2
US Pressure2 US Result2 US Timebase2 US Compl21 US........
GACR01
Decay Contra Reflex
Right Ear
Frequency US Pressure US Method US NumberOfPoints US GS
dB1 US mS[0] US ml[0] US ……….………mS[NumberOfPoints] US
ml[NumberOfPoints] US GS dB2 US <CurveData> GS until dB6 if
the method is sequence and 6 reflexes recorded.
AT235 Appendix A page 7
ETF1
Left Ear
Header
GILE00
Description
ETF1 Left Ear
(Old format)
Format
Volume US Pressure1 US Press11 US Compl11 US Press12 US
Compl12 US......US GS Pressure2 US Press21 US Compl21 US
Press22 US Compl22 US....
GILE01
ETF1 Left Ear
EarVolume US NumberOfPoints US StartPressure US
EndPressure US PumpSpeed US GS Pressure1 US <Curve1> US
GS Pressure2 US <Curve2> US GS Pressure3 US <Curve3>
Curve = Pressure[0] US ml[0] US ………………………………….
Pressure[NumberOfPoints] US ml[NumberOfPoints] US EOT
Right Ear
Header
GIRE00
Description
ETF1 Right Ear
(Old format)
Format
Volume US Pressure1 US Press11 US Compl11 US Press12 US
Compl12 US......US GS Pressure2 US Press21 US Compl21 US
Press22 US Compl22 US....
GIRE01
ETF1 Right Ear
EarVolume US NumberOfPoints US StartPressure US
EndPressure US PumpSpeed US GS Pressure1 US <Curve1> US
GS Pressure2 US <Curve2> US GS Pressure3 US <Curve3>
Curve = Pressure[0] US ml[0] US ………………………………….
Pressure[NumberOfPoints] US ml[NumberOfPoints] US EOT
ETF2
Left Ear
Header
GPLE00
Description
ETF2 Left Ear
Format
Timebase US Open1 US Close1 US Open2 US Close2 US Open3
US Close3 US Press1 US Press2 US Press3 US.....
Description
ETF2 Right Ear
Format
Timebase US Open1 US Close1 US Open2 US Close2 US Open3
US Close3 US Press1 US Press2 US Press3 US.....
Right Ear
Header
GPRE00
AT235 Appendix A page 8
Get All Data
Header
SGGA00
Description
Get All Data (Old format)
Format
Returns with all data stored. Look for headers in the return string
and see in this manual for format description. The Tymp and the
reflexes are transferred in the old format.
Header
SGGA01
Description
Get All Data (New format)
Format
Returns with all data stored. Look for headers in the return string
and see in this manual for format description. The Tymp and the
reflexes are transferred in the new format.
EEPROM Commands
Set or get EEPROM data
Header
GDE100
GDE101
Description
EEPROM Data
EEPROM
Data
from
Address + number of
bytes
Format
Data1 US Data2 US …….. Data8192 US EOT
Master SI: Address US NumberOfBytes US EOT
Slave: Data[Address] US ……….. Data[NumberOfBytes] US EOT
Master SO: Address US NumberOfBytes US Data[0] US ………..
Data[NumberOfBytes] US EOT
Calculate Checksum
When the values in the EEPROM are changes with the two commands above, the Instrument has to calculate a
new checksum of the values in the EEPROM.
Header
CHKS00
Description
Calculate Checksum
Format
Information
Header
GDID00
GDID01
GDID03
Description
Identification of communication version
Instrument name and version
Serial number and date
Format
data US
data US
xxxxxxx US ddmmyyyy US EOT
AT235 Appendix A page 9
Remote Commands
It is possible to remote control the Instrument via the USB connection.
Header
SPKY00
SPF100
SPA100
SPA101
SPA200
SPI100
SICP01
SICP02
SICP03
SPIN00
SPDN00
Description
Set a key or menu in the instrument
Set frequency in channel 1
Set attenuator for channel 1
Set attenuator calibration for channel 1
Used for auto calibration
Set attenuator for channel 2
Set interrupter for channel 1
Delete all patient data
Reset to Power-up menu
Update display (only in Headset calibration)
Set Instrument Name
Set Dealer Name
Format
Keynumber or Menunumber US EOT
Frequency US EOT
DB US EOT
(Intensity – Measured Intensity) US EOT
DB US EOT
“1” is sound off and “0” is sound on
“name” US EOT max. 15 characters
“name” US EOT max. 20 characters
To control the keys on the Instrument use the following table to find the key number.
Key name
F1
F2
F3
F4
F5
F6
Back
Code
1017
1018
1019
1020
1021
1022
1023
Key name
Shift + F1
Shift + F2
Shift + F3
Shift + F4
Shift + F5
Shift + F6
Shift + Back
Code
1117
1118
1119
1120
1121
1122
1123
Print
Pause
1009
1001
Print Screen
New Subject
1109
1101
Store
1010
No Response
Frequency Decr
Intensity Decr
1025
1027
Frequency Incr
Intensity Incr
Key Name
Tymp/Reflex
ETF
Audiometry
Man
Code
1002
1006
1007
1008
Ipsi
Contra
1004
1005
1110
Right
Left
1011
1012
1026
1028
Ext. Range
1128
AT235 Appendix A page 10
Status
Header
SGRS02
Description
Reduced instrument status
SGME00
Menu Status
Format
Intensity Ch1 US Intensity Ch2 US Frequency
US Input US Output US Transducer US Store
Flag US EOT
Active Menu US Submenu US EOT
Input, Output and Transducer
The Input and Output parameter in the reduced status is a numerical value, use the table below to obtain the Inputand Output type.
Input type
Pure Tone
Low Pass Noise
High Pass Noise
Wide Band Noise
Code
1
10
11
12
Output type
Right Phone
Left Phone
Contra Phone
Probe Tone
Probe Ipsi speaker
No output
Code
2200
2201
2202
2203
2204
2206
Transducer
TDH39
EAR
CIR22
Handheld Probe
Clinic Probe
Code
1250
1251
1252
1253
1254
Active Menu and Submenu
The Menu Status returns the Active Menu and Submenu as a numerical value, use the table below to obtain the
name of the menus. The Submenu is only used in Impedance Menu. It is possible to select a Menu with the
SPKY00 command and the codes below.
Active Menu
Main
Setup
Common Setup
Subject
Calibration
Tympanometry Setup
Password
Reflex Setup
Headset Real Mode
Fixed Attenuator
Advanced Setup
EEPROM Setup
Advanced Reflex
Advanced Audiometry
Attenuator
Headset Calibration
Probe Calibration
Code
12000
12001
12003
12007
12009
12011
12012
12013
12015
12016
12017
12018
12019
12020
12021
12022
12023
Active Menu
Pressure Calibration
Compliance Calibration
Probe Tone Calibration
Probe Real Mode
Clinic
Modify
Manual Audiometry
Impedance
Famili Test
HW Test
Manual Reflex
ETF1
IPSI Calibration
Submenu
Tympanogram
Reflex
Tympanogram + Reflex
Code
12024
12025
12027
12028
12029
12030
12031
12032
12033
12034
12035
12036
12037
Code
10
11
12
AT235 Appendix A page 11
Setup Items
The Setup Items in the Instrument can be read and written with the following header. In the table below the setup
items are listed with their number and value range.
Header
GDSD00
Description
Sets or Gets a Setup Item in the Instrument.
Setup Name
Tympanometry Setup
Format
Master: SO US Item No US Value US EOT
Slave: Sends nothing back
Master: SI US Item No US EOT
Slave: Value US EOT
Setup Item
Start Pressure
Stop Pressure
Pump Speed
Compensation Mode
Gradient Unit
Reflex Setup A
Reflex Method
Test Stop Criteria
Reflex Senitivity
Reflexes pr Sequence
Level increase
Compensate for general drifting
Reflex 1 Output
Reflex 1 Frequency
Reflex 1 Level
Reflex 1 Status
To get Reflex Setup B Reflex 2..6 has the same value
range, the number is Reflex 1
add 50 to Number
Number + 4 for Reflex 2……
Common Setup
Power-up
Pause
Remote Switch
Manual Reflex Attenutor
Reflex Icon Boxes
Printer
Subject Data Printout
Clinic Data Printout
Print After Test
Keyboard Connected
Language
Number Value Range
191 25 = 25 daPa
…
36 = 300 daPa
192 0 = -600 daPa
…
23 = -25 daPa
193 10 = Low, 11 = Medium
12 = High, 13 = Automatic
195 10 = Comp., 11 = Non Comp.
196 10 = ml, 11 = daPa, 12 = Off
91 10 = Fixed, 11 = Screening,
12 = Auto, 13 = Sequence
92 0 = Off, 1 = On
93 10 = Sensitive, 11 = Normal,
12 = Robust
94 10 = 2 reflexes … 14 = 6 reflexes
95 10 = 5 dB … 15 = 10 dB
16 = 15 dB … 19 = 30 dB
96 0 = Off, 1 = Normal
100 10 = IPSI … 11 = Contra
101 10 = 125 Hz … 23 = HP
102 60 = 60 dB … Max = Max Output
103 0 = Off, 1 = On
215 10 = Tymp
11 = Tymp and Reflex
220 0 = Off, 1 = On
212 10 = L/R, 11 = Pause,
12 = L/R or Pause, 13 = Off
213 10 = 1 dB, 11 = 2 dB, 12 = 5 dB
217 4 = 4, 6 = 6
211 10 = Internal, 12 = Off
223 0 = Off, 1 = On
218 0 = Off, 1 = On
216 0 = Off, 1 = On
221 0 = No, 1 = Yes
224 0 = English, 1 = German
AT235 Appendix A page 12
Setup Name
Advanced Setup
Setup Item
Start Ear
Password
Number
70
71(MSB)
-74(LSB)
76
Contra Headset
Advanced Reflex Setup
Value Range
10 = Right, 11 = Left
0–9
10 = Cir22, 11 = TDH39,
12 = EAR
10 = Handheld, 11 = Clinic,
12 = Combi
0 = Disable, 1 = Enable
0 = 0 – 100m, 25 = 2500 –
2599m
10 = Normal, 11 = Sensitive
Impedance Transducer
79
Enable ETF Test
Height above sea level
77
78
Seal Sensitivity
80
Display Reflexes
Compliance Change
Max Reflex scale limit
40 10 = Positive, 11 = Negative
43 10 = ml, 11 = %
59 10 = 0,10 ml, 11 = 0,15 ml,
12 = 0,20 ml, 13 = 0,25 ml
Stimuli Selection
250 Hz
750 Hz
1500 Hz
3000 Hz
4000 Hz
6000 Hz
8000 Hz
WB
LP
HP
Autotest max upper limit
Default manual intensity
AGC for IPSI reflex stim.
Advanced Audiometry
Manual Audiometry
Automatic Audiometry
Audiometry Headset
Default Intensity
Not Heard Lines
Audiometer Frequencies
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
90 = 90 dB … 110 = 110 dB
In steps of 5 dB.
63 60 = 60 dB … 110 = 110 dB
In steps of 1 dB.
42 0 = Off, 1 = On
0 10 = TDH39, 11 = EAR3A
2 0 = Off, 10 = -10 dB, 70 = 50 dB
3 0 = Off, 1 = On
125 Hz
250 Hz
750 Hz
1500 Hz
3000 Hz
6000 Hz
8000 Hz
5
6
8
10
12
14
15
1
28
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
10 = Bottom, 11 = Butterfly
10 = Off, 11 = 5 dB … 18 = 40 dB
125 Hz
250 Hz
750 Hz
1500 Hz
3000 Hz
6000 Hz
8000 Hz
16
17
19
21
23
25
26
4
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On
10 = 2 out of 3, 11 = 3 out of 5
Frequency Jump Mode
Intensity Step Down
HW Frequencies
Conditions
46
48
50
52
53
54
55
56
57
58
60
AT235 Appendix A page 13
Examples of Transmission
All ASCII characters are separated form control codes with “ “ ! Ex. “00” means two byte each representing a zero.
Ex. 1 Transmitting all EEPROM data from the Instrument
Master:
Slave:
STX “00” US “00” US SI SOH “GDE100” US EOT
STX “00” US “00” US SOH “GDE100” US data............. EOT
Ask for EEPROM data.
Send EEPROM data.
Ex. 2 Sending all EEPROM data from the PC to the Instrument
Master:
Slave:
Master:
Slave:
STX “00” US “00” US SO SOH “GDE100” US data....... EOT
Nothing.
STX “00” US “00” US SO SOH “CHKS00” US EOT
Nothing.
Send EEPROM data.
Calculate new checksum
Ex. 3 Setting a key or menu in the Instrument
Master:
Slave:
STX “00” US “00” US SO SOH “SPKY00” US “12001” US EOT Select Setup menu.
Nothing.
Ex. 4 Getting all relevant subject data from the Instrument
Master:
Slave:
STX “00” US “00” US SI SOH “SGGA00” US EOT
STX “00” US “00” US SOH “BLST00” US EOT STX “00” US
“00” US SOH “SGGA00” US data... EOT STX “00” US “00” US
SOH “BLEN00” US EOT
Ask for all data.
Send all stored subject data
between a Block Start and
Block End.
Ex. 5 Getting data - left phone from the Instrument
Master:
Slave:
STX “00” US “00” US SI SOH “GTLP00” US EOT
STX “00” US “00” US SOH “GTLP00” US data............. EOT
Ask for data.
Send left phone data.
Online Communication
Valid from software version AT235h 1.10108 and AT235 1.11108
The AT235 is capable to send information to the PC, whenever things change in the instrument and when data is
obtained from the probe. The online communication is enabled from the PC, because it only is used together with a
PC. The Online Communication is not completely implemented yet, so subject to change.
Header
OLEN00
OLDI00
Description
Enable online communication
Disable online communication
Format
AT235 Appendix A page 14
How the instrument works
When the AT235 is doing its normal measurements it is running in automated mode where everything is preset.
That why the menu is called "Auto impedance". There are three screens in this mode. One where "all" information
are put together (Tymp and Reflex mixed), one full screen with tymp (extended tymp) and one full screen with
reflex (extended reflex). When an automated session takes place the instrument switches to a menu without any
graphically interface called "Do Test". This is the control centre of the instrument where the list of tasks to perform
are placed and executed. Further more there are a "Do Tymp" menu and a "Do Reflex" menu also without
graphically interface that deals with the measuring of data. That's why the "menu" item changes during a
measurement.
Menu’s like EFT and Manual Reflex measurement uses the “Do Tymp” menu and the “Do Reflex” menu without the
“Do Test” menu.
The inside (both hardware and software) of the instrument is designed with two sound channels. This is necessary
when we need to produce both a probe tone and stimuli at the same time. The CPU is in control of a DSP with a
two channel Codex. When monitoring the state of the instrument you therefore needed to show the state of two
channels. The probe tone is always controlled from channel 2.
Headers from the Instrument when things change
Header
OLMU02
OLMU03
OLKY00
Description
Menu Changed
Submenu Changed
Key pressed
Format
Menu US EOT
Submenu US EOT
Key US Status US EOT
This is what strings the instrument can send when it sends the OLMU02 (Menu Changed) header
“Main”, ”Setup”, ”Common Setup”, ”Subject”, ”Calibration”, ”Tymp Setup”, ”Password”, ”Reflex Setup”, ”Headset
Real”, ”Fixed Attenuator”, ”Advanced Setup”, ”EEPROM Setup”, ”Advanced Imp Setup”, ”Advanced Aud Setup”,
”Attenuator Calibration”, ”Headset Calibration”, ”Probe Calibration”, ”Pressure Calibration”, ”Compliance
Calibration”, ”Probe Tone Calibration”, ”Probe Real”, ”Clinic”, ”Modify”, ”Tone”, ”Auto Impedance”, ”HW Family”,
”HW Test”, ”Manual Impedance”, ”ETF1”, ”Ipsi Calibration”, ”ETF3”, ”Headset Options”, ”ETF2”, ”Manual
Audiometry Setup”, ”Audiometry Setup”, ”Test Audiometry Setup”, ”Impeadence Setup”, ”ABLB”, ”Stenger”,
”Function”, ”SISI”, ”Talkforward”, ”Reset”, ”Speech”, ”Speech Setup”, ”Attenuator Setup”, ”Cochlear Implant”,
”Speech USA”, ”Do Reflex”, ”Do Tymp”, ”Do Test” ”, ”Error”.
This is what strings the instrument can send when it sends the OLMU03 (Sub Menu Changed) header
“Extended Tymp”, ”Extended Reflex”, ”Reflex and Tymp Mixed”.
This is what strings the instrument can send when it sends the OLKY00 (Key pressed) header
“Pause”, “Tymp”, “Reflex”, “Ipsi”, “Contra”, “ETF”, “Audiometry”, “Manual”, “Print”, “Store”, “Right”, “Left”, “F1”, “F2”,
“F3”, “F4”, “F5”, “F6”, “Back”, “High Tymp”, “Hz Decr”, “Hz Incr”, “dB Decr Ch1”, “dB Incr Ch1”, “Impedance”, “Talk
Forward”, “Manual/Auto”, “Function”, “Bone”, “dB Decr Ch2”, “dB Decr Ch2”, “Auto”, “Bone Right”, “Bone Left”,
“Ch2 Off”, “Mic”, “CD 1 and 2”, “CD 1”, “CD 2”, “Monitor Talkback”, “Monitor”, “Talkback”, “FF 1 and 2”, “FF 1”, “FF
2”, “Store No Response”, “Extended Range”, “Print Screen”, “New Subject”, “Error”.
AT235 Appendix A page 15
Analog changes
Header
Description
Format
OLAN06 Input Changed
Input type US Channel US EOT
OLAN01 Intensity Changed
Intensity dB US Channel US EOT
OLAN07 Plus 20 dB Changed
Status US Channel US EOT
OLAN08 Interrupter Changed
Status US Channel US EOT
OLAN09 Output Changed
Output type US Channel US EOT
OLAN10 Transducer Changed
Transducer type US Channel US EOT
This is what strings the instrument can send when it sends the OLAN06 (Input Changed) header
“125”, “250”, “500”, “750”, “1000”, “1500”, “2000”, “3000”, “4000”, “6000”, “8000”, “WN”, “LP”, “HP”, “SN”, “CD 1”,
“CD 2”, “Mic”, “226”, “678”, “800”, “1000”, “Probe Mic”, “Talk Forward”, “Talk Back”, “No Input”, “30000”, ”Error”.
“30000“ Means no data.
This is what strings the instrument can send when it sends the OLAN07 (Plus 20 dB Changed) header
“Off”, “Internal”, “External”, “Error”.
Internal means that the plus 20 dB step is switched on and can not be changed by pressing the Extended Range
key.
External means that the plus 20 dB step can be switched on/of by pressing the Extended Range key.
This is what strings the instrument can send when it sends the OLAN08 (Interrupter Changed) header
“On”, “Off”, “Auto Off”, “Error”.
“Auto Off” is a state where the DSP itself switches off the interrupter after x mS. Used in a reflex measurement
where tone is on for 500 mS.
This is what strings the instrument can send when it sends the OLAN09 (Output Changed) header
“Right”, “Left”, “Contra”, “Probe Tone”, “Probe Ipsi”, “Probe Pressure”, “No Output”, “Bone Right”, “Bone Left”, “FF1
Right”, “FF1 Left”, “FF2 Right”, “FF2 Left”, “Insert Right”, “Insert Left”, “Error”.
This is what strings the instrument can send when it sends the OLAN10 (Transducer Changed) header
“TDH39”, “EAR”, “CIR22”, “Handheld Probe”, “Clinical Probe”, “B71”, “Free Field”.
Tymp Measurement
Header
OLTY02
Description
Tymp Test Start
OLTY01
Tymp Test Done
Tymp Data
OLTA00
Test Aborted
Format
Start Pressure US Stop Pressure US Ear Volume US Ear US
probe tone frequency US pump speed US data US EOT
Compliance of max. US Pressure of max. US Gradient US
NumberOfPoints US EOT
Compliance US Pressure US EOT (The data pairs are
transferred to the PC between the Test Start and Test Done or
Test Aborted)
NumberOfPoints US EOT
AT235 Appendix A page 16
Reflex Measurement
Header
OLRE02
Description
Reflex Test Start
OLRE01
Reflex Test Done
Reflex Data
Format
Ear US Pressure at which reflex is tested US probe tone
frequency US Reflex Method US Output US frequency US
intensity (dB) US Reflex Box number US Count Of Reflexes in
the current box US Index of Reflex in the Current Box US
PointsInReflex US TimeBase US EOT
NumberOfPoints at this level US EOT
Compliance US EOT (The data pairs are transferred to the PC
between the Test Start and Test Done or Test Aborted)
HW Measurement
Header
OLHW00
Description
Header Event
Format
Event US EOT
Events for HW Measurement
“Test Started”, “Test Done”, “Test Interrupted”, “Test Failed”, “Changed Ear”, “Retest Failed”, “Retesting”.
Audiometry Measurement (also active during HW measurement)
Header
OLSA00
Description
Store Information
OLPA00
Patient Response
Format
Intensity Ch1 US Frequency US Masking Intensity US Status
US EOT
Status US EOT
Status in OLSA00 can be “Heard” and “Not Heard”.
When using the online mode it is not advisable to use static headers that requests data to be send out of the
instrument (SI) at the same time. It will disturb the online transmissions from the instrument.
Most parameters send with the headers are send as text. Example : If the Right key is pressed the text “Right” is
send.
Cochlear Implant
For measuring on patients with Cochlear Implant, it is possible to select a menu through USB, where the
compliance data is transmitted continuous to the host. The data format is 1000 = 1 ml and is transmitted in ASCII
with an US and an EOT at the end for each data, the sample rate is 226 Hz.
Header
SPKY00
CIEN00
CIDI00
CIPR00
CIPP00
Description
Set the CI menu in the instrument
Start the CI measurement
Stop the CI measurement
Get the Pressure
“Pump to” Pressure
Format
12060 US EOT
Pressure US EOT
Pressure US EOT (min –600 daPa and max
300 daPa)
AT235 Appendix A page 17
Communication in Windows
In this section sample code show how the communication could be made, it is using the ActiveX Control
MSComm32, the code is compiled in Visual C++ 6.0.
This function opens the specified com port at 38400 baud, even parity, 8 bits and 1 stop bit. The receive threshold
is set to 1 byte
BOOL OpenPort(int PortNo)
{
CString SettingStr;
SettingStr = "38400,E,8,1";
m_CommControl.SetCommPort(PortNo);
m_CommControl.SetSettings(SettingStr);
m_CommControl.SetHandshaking(2);
m_CommControl.SetPortOpen(TRUE);
m_CommControl.SetRThreshold(1);
return m_CommControl.GetPortOpen();
}
This function sends a string out on the com port
void SendString(CString StringToSend)
{
VARIANT OutString;
OutString.vt = VT_BSTR;
OutString.bstrVal = StringToSend.AllocSysString();
m_CommControl.SetOutput(OutString);
}
This function calculates the CRC value and inserts into the string.
CString CTestAT235Dlg::CalculateCRC(CString StringToCalculate)
{
int CRCValue = 0, Counter;
CString CRCString;
for (Counter = 0; Counter < StringToCalculate.GetLength(); Counter++)
CRCValue += StringToCalculate.GetAt(Counter);
sprintf( CRCString.GetBuffer(10) , "%.5d", CRCValue );
StringToCalculate.Insert(StringToCalculate.GetLength()-1, CRCString);
return StringToCalculate;
}
This function receives data form the com port. The MSComm32 control generates an event when characters
arrives at the com port and if any errors occur, see documentation of the MSComm32 control.
void CTestAT235Dlg::OnOnCommMscomm1()
{
AT235 Appendix A page 18
VARIANT InStringVar;
CHAR ch;
DWORD LastPosition;
switch (m_CommControl.GetCommEvent())
{
case 2: InStringVar = m_CommControl.GetInput();
InString += InStringVar.bstrVal;
LastPosition = InString.GetLength()-1;
ch = InString.GetAt(LastPosition);
if (ch == 4) // The EOT is received
{
// Now deal with the data in the InString
InString.Empty();
}
break;
}
}
AT235 Appendix A page 19
Appendix B User Setup
Set-up Navigation
Entering the Set-up
Press <shift> + <Back> and the instrument will return to the AT235 Main menu from any selected menu.
Press Set-up (F2) and you will enter the user set-up of the AT235.
Navigation
In each menu is possible to move a bar (see figure 1) trough the set-up items and change the settings for the setup item.
Sub menu
Menu
Menubar
Setup
Menu line
Change Item
”One menu back” Key
Navigation Keys
Menu Keywords Figure 15
Pressing the arrow down (F2) or up (F3) the menu bar moves and by pressing Change (F1) you can change the
settings for the item selected by the menu bar.
Leaving a Menu
When the changes are made press the <Back> key. No changes are stored before you leave the menu and if
anything is changed the instrument will ask you to save data or not. Please note that you have to press Yes (F1) or
No (F6).
Save data at menu exit. Figure 16
AT235 Appendix B page 1
User Setup
This is the description of the navigation in the User Setup in AT235 and which options can be changed from the
setup.
Tympanometry Setup
Tympanometry Setup. Figure 17
Start Pressure
Factory
200 daPa
Range
300 to 25 daPa in 25 daPa steps
Description Start Pressure indicates what pressure will be established as start out point for the pressure sweep.
Stop Pressure
Factory
-400 daPa
Range
-25 to -600 daPa in 25 daPa steps
Description Is the pressure where the sweep will stop.
Pump Speed
Factory
Automatic (150 daPa/sec, 50 daPa/sec, 150 daPa/sec)
Range
Minimum (17 daPa/sec), Medium (50 daPa/sec), Maximum (150 daPa/sec) or Automatic (150
daPa/sec, 50 daPa/sec, 150 daPa/sec).
Description A slow speed will be more time consuming, but may give more detailed information. The horizontally
displacement of the tympanogram peak in the sweeping direction caused by inherent hysteresis of
the system will be smaller with lower speed.
Automatic is a mode where sweep speed at the beginning will be Maximum (150 daPa/sec) and
when the gradient is smaller than 5 the speed will be slowed to Medium (50 daPa/sec). When the
peak is bigger than 5 again the speed will be set to Maximum (150 daPa/sec) again.
Compensation Mode
Factory
Compensated
Range
Compensated or Non compensated
AT235 Appendix B page 2
Description Mode is set to “Compensated” if you want to have the curve displayed at the floor of the coordinate
system. In “Non compensated” mode the tymp curve will be displayed including the ear canal
volume.
Gradient Unit
Factory
ml
Range
ml, daPa or Off
Description The gradient is an expression of the shape of the tymp curve. Narrow or wide.
If ml is selected the gradient will be calculated the following way: The program will go 50 daPa to
each side from compliance value and save the two ml values. The gradient is the average of the two
ml values subtracted from the compliance value.
If daPa is selected the gradient will be calculated the following way: The program searches from
each end of the tymp curve and stores the pressure where the point at the tymp curve is equal to
compliance value divided with 2. Gradient is equal to the two stored pressures subtracted from one
another.
If Off is selected the gradient box will be removed from the user interface.
Setting up Reflex Tests
The AT235 can hold information for two reflex tests: Reflex Test A and Reflex Test B. Each test can hold setup
options for 6 reflexes expressed in the table in the bottom of the screen figure (see figure 5). The upper part of the
screen describes how and with what method the 6 reflexes will be taken. So the reflex setup is a matter of
determined the start conditions for each of the 6 reflexes in the table (output, stimuli, level and if in use or not) and
with what method the reflex will be taken.
Note that it is the same method for all 6 reflexes. If you want one reflex with one method and another reflex with
another method, use Reflex Test A and Reflex Test B.
Reflex Test (method is Fixed). Figure 18
AT235 Appendix B page 3
Navigating and changing in the Table
Use the 4 arrow keys to move the bar in the table. You can use change to select another option for a given item,
but you may also use the dedicated keys as well. If for an example you want to change the level you can use the
dB keys instead of the Change (F1). See Figure 3.
Reflex Table. Figure 19
Following figure is equal to factory settings for Reflex Test A.
Reflex Test A. Figure 20
AT235 Appendix B page 4
Following figure is equal to factory settings for Reflex Test B.
Reflex Test B. Figure 21
Output
Factory
See Table 1
Range
Ipsi or contra.
Description Can be assigned to Ipsi or contra as output.
Stimuli Frequency
Factory
See Table 1
Range
Ipsi is 500 Hz, 1000 Hz, 2000 Hz, 3000 Hz, 4000 Hz, WN, LP or HP. Contra is 125 Hz, 250 Hz, 500
Hz, 750 Hz, 1000 Hz, 1500 Hz, 2000 Hz, 3000 Hz, 4000 Hz, 6000 Hz, 8000 Hz, WN, LP or HP.
Description Can assign new stimuli to Ipsi or contra.
Level
Factory
See Table 1
Range
60 dB to Maximum (depend of transducer and selected frequency).
Description If Reflex Method is selected to Sequence an arrow will be put after the intensity value to indicate that
this is the start level.
In table 1 you will find that the factory test configuration will perform 4 of the 6 reflexes. Setting the last row to on/off
depending on what you want to start with can choose this.
Reflex Methods
The Reflex Method can be assigned to 4 different methods where three of the four methods have additional setup
points. In the following you can see what they do and how to set them up.
AT235 Appendix B page 5
Fixed
Reflex Method Fixed. Figure 22
Method description
A fixed intensity reflex is one reflex taken at one intensity level like the one in Figure 7.
Fixed Reflex. Figure 23
Screening (10 dB Steps)
Reflex Method Screening (10 dB Steps). Figure 24
AT235 Appendix B page 6
Method description
The Screening method is an auto test for detecting reflexes. Starting at level from the reflex table the automation
will do a reflex measurement and verify the reflex against the reflex sensitivity box (see “Reflex Sensitivity”). If the
reflex is bigger than the sensitivity box the test is done. If not the intensity level will increase with 10 dB and do
another reflex. This will continue until the reflex is bigger than the sensitivity box or until maximum intensity level
has been reached.
Reflex Sensitivity
Factory
Normal
Range
Sensitive, Normal or Robust.
Description See “Reflex Sensitivity”
Auto (5 dB Steps)
Reflex Method Auto (5 dB). Figure 25
Method description
The auto test method is a bit different from the screening method. It presents a stimulus for a time of approximately
80 mS where after it verifies the compliance against the start compliance. If the difference is bigger than the size of
the reflex sensitivity test box (see “Reflex Sensitivity”), it performs a reflex measurement. The reflex is then tested
against the reflex sensitivity test box. If the reflex is outside the test box the reflex measurement is done. If not the
instrument performs the same test once again. If the search fails after second attempt the instrument will continue
the search with the screening method in 5 dB steps instead of the currently auto search. If the reflex intensity level
reaches maximum intensity level for the transducer the search is done accepting the reflex found.
AT235 Appendix B page 7
Reflex sensitivity
Factory
Normal
Range
Sensitive, Normal or Robust.
Description See “Reflex Sensitivity”
Sequence
Reflex Method Sequence. Figure 26
Method description
The sequence method gives the possibility of having up to 6 single reflexes in one Figure. The level from the table
is used as start level and the jump between each reflex can be set in “Level increase”. The screening method has
stop criteria so it stops the measurement if the reflex is equal to or bigger than the reflex sensitivity test box. The
function can be selected on or off and the level of sensitivity can be selected in the “Reflex Sensitivity” item.
Reflex Sequence.Figure 27
Reflexes pr sequence
Factory
6 reflexes pr sequence
Range
2,3,4,5 or 6 reflexes pr sequence
Description Lets you have up to 6 reflexes pr sequence. Note that the higher the number of reflexes is the less
detailed the graphic will be.
Level of increase
Factory
5 dB
Range
5,6,7,8,9 or 10 dB
Description How many dB the intensity will be increased between each single reflex.
AT235 Appendix B page 8
Compensation for general drifting
Factory
Normal
Range
Off and Normal
Description During a sequence reflex measurement the compliance may drift as you can see in the figure below.
To compensate for this drift select the “Normal” and the reflex drift will be removed.
Reflex with compliance drift
Compensated reflex
Compliance drifting. Figure 28
Test stop criteria
Factory
Off
Range
On or Off
Description Let you select if you want to skip the rest of the reflexes in a sequence when the condition are
matched and continue with the next sequence.
Reflex Sensitivity
Factory
Normal
Range
Sensitive, Normal or Robust.
Description See “Reflex Sensitivity”
Reflex sensitivity
When using reflex the automatic methods Automatic or Screening, the AT235 uses an algorithm to determined if a
reflex is okay or not. The level of sensitivity can be set with setup item “Reflex Sensitivity” where you can choose
between Sensitive, Normal or Robust. The AT235 has two different modes of leveling sensitivity : ml or % (can be
set in the Advanced User Setup) and depending on what method you will get different results. Look in the following
Figures for the difference.
When using auto search for reflexes the algorithms in the software will go on until intensity has reached maximum
level for the selected transducer at the give frequency. So the software in two ways can accept the reflex: the reflex
does not touch the test box (the test box is normally invisibly) or intensity is at maximum level. You can se what a
test box is by looking at the Figures below. The test box is the dotted rectangle in the middle of the Figure.
AT235 Appendix B page 9
Reflex sensitivity in ml
Sensitive (0.05 ml)
Normal (0.10 ml)
Robust (0.15 ml)
Reflex Sensitivity in ml. Figure 29
The first reflex is okay because the reflex does not touch the test box. The two last reflexes is not okay according
to the algorithm but has been accepted because of maximum intensity level.
Reflex sensitivity in %
Sensitive (2 %)
Normal (4 %)
Robust (6 %)
Reflex Sensitivity in %. Figure 30
All three reflexes are okay because none of them is inside or touching the test box.
The height of the test box when using % sensitivity depends on the size of the ear volume.
The sensitivity condition is used by the auto method, screening method and by the sequence method.
Note! The test box is not shown in the AT235 software. It only serves as examples of what sensitivity is and how
we do it.
AT235 Appendix B page 10
Common Setup
Common Setup. Figure 31
Power-up
Factory
Tymp and Reflex
Range
“Tymp” or “Tymp and Reflex “
Description Selects what menu the instrument will go to after power-up.
Pause - default
Factory
Off
Range
On or Off
Description If “On” is selected the pause key is pre selected when a test is finished and when entering the
automatic impedance menu.
Communication
Factory
USB
Range
USB
Remote Switch
Factory
L/R
Range
Pause, Off or L/R
Description Selects the function of the key on the impedance transducer.
Manual Reflex Attenuator
Factory
5 dB
Range
1, 2 or 5 dB
Description How many dB’s the intensity will increase/decrease when pressing the dB keys in manual
impedance mode.
AT235 Appendix B page 11
Reflex Icon Boxes
Factory
6 boxes
Range
4 or 6 Boxes
Description Selects between 4 or 6 reflex icon boxes (see Figure)
4 Reflex Icon Boxes
6 Reflex Icon Boxes
4 vs. 6 Reflex Icon Boxes. Figure 32
Printer
Factory
Internal
Range
Internal, HP PCL L3, IBM Mode or Off.
Description Select what type of printer that is attached to the instrument.
Note! The HP PCL L3 mode shall be selected in when connecting a HP Laser printer.
Subject data printout
Factory
On
Range
On or Off
Description If “On” is selected the subject information will be printed together with subject data.
Note! Only available when using internal printer.
Clinic data printout
Factory
On
Range
On or Off
Description If “On” is selected the clinic information will be printed together with subject data.
Print After Test
Factory
Off
Range
On or Off
Description When a test is done and data are recorded on both ears a print out will be done on the selected
printer.
AT235 Appendix B page 12
Keyboard Connected
Factory
No
Range
Yes or No
Description If “Yes” is selected the subject menu will appear when pressing <New Subject> where it is possible
to enter subject data and/or delete current data and proceed with a new measurement. If “No” is
selected a dialog box saying “All Data Deleted!” will appear shortly and the instrument is ready for a
new measurement.
Clinic Setup
Clinic Setup. Figure 33
The Clinic Setup lets you insert your clinic data used for printouts. Note that the setup item “Clinic Data Printout” in
the Common Menu needs to be On before data comes out on paper.
To enter data you need an AT keyboard (ordinary PC keyboard) attached to the AT235 while entering data.
AT235 Appendix B page 13
Appendix C Advanced User Setup
Advanced User Setup
This appendix describes the advanced setup functions of the AT235.
The Calibration Menu. Figure 34
In the Calibration menu there are two issues of interest for setting up the AT235. The first is the Advanced User
Setup and the second is the setup storage facilities in the EEPROM menu. Note that it requires a password to
access the Calibration and that entering the calibration menu is done during power up by holding down <shift> and
<print> until you can enter the password.
The Advanced User Setup
The first setup that appears when pressing Setup (F1) in the calibration menu is a setup for common stuff.
Advanced User Setup. Figure 35
Start Ear
Factory
Right
Range
Right or Left
Description Here you may choose which ear to select automatically for the first test.
AT235 Appendix C page 1
Password
Factory
1234
Range
Each digit can be change within a range of 0 to 9
Description Makes it possible to change the password for entering the calibration.
Note! You need an AT Keyboard to change this item and Keyboard “On” must be selected in the
Common menu.
Contra Headset
Factory
TDH39
Range
Cir22, TDH39 or EAR 3A
Description Here you may choose which contra headset to use.
Impedance Transducer
Factory
Handheld
Range
Handheld or Clinic
Description Gives you the possibility to change between the Clinical and the Handheld impedance transducer.
Note that the transducer might need to be calibrated before use and that the AT235 can hold
calibration sets for both transducers at the same time.
Enalbel ETF1 Test
Factory
Enable
Range
Enable or Disable
Description If you select disable it is not possible to start the ETF test.
Height above sea level
Factory
0 - 99 m
Range
0 - 2599 m in 100 m steps
Description To give a more precise measuring system – especially at high probe tone tympanometry.
Instrument Name
Factory
AT235
Description Makes it possible to change the instrument name.
Note! You need an AT Keyboard to change this item and Keyboard “On” must be selected in the
Common menu.
Dealer Name
Factory
Interacoustics A/S
Description Makes it possible to change the Dealer name. The Dealer name appears on the top of thermo
printout.
Note! You need an AT Keyboard to change this item and Keyboard “On” must be selected in the
Common menu.
AT235 Appendix C page 2
Seal sensitivity:
Sensitive
This gives reproducible results. Require quiet probe handling.
Normal
Quicker seal detection and less sensitive than the above selection.
Robust
Very quick seal detection. AGC on the probe tone is disabled.
Advanced Reflex User Setup
Advanced Reflex User Setup. Figure 36
Display Reflexes
Factory
Positive
Range
Positive or Negative
Description Selects how to display the reflexes in the diagrams.
Positive
Negative
Positive and Negative reflex display. Figure 37
Complaince Change
Factory
ml
Range
ml or %
Description This setup item is used in connection with the “Reflex Sensitivity” setup item from the Reflex Test
A/B menu. Choose between ml (0.05, 0.10 or 0.15 ml) and % (2, 4 or 6 % of ear volume).
AT235 Appendix C page 3
Max Reflex scale limit
Factory
0,15 ml
Range
0,10 ml, 0,15 ml, 0,20 ml or 0,25 ml
Description Is used to select the scale of the ml axis of the reflex diagram.
0,10 ml scale
0,15 ml scale
0,20 ml scale
0,25 ml scale
Same Reflex in different scales. Figure 38
Stimuli Selection
Factory
All frequencies are selected as factory setting
Range
250 Hz, 750 Hz, 1500 Hz, 3000 Hz, 4000 Hz, 6000 Hz, 8000 Hz, WN, LP and HP can be selected as
On or Off.
Description Use the frequency keys to select the desired frequency and press Change (F1) to select “On” or
“Off”. Note! This item has influence on both ipsi and contra frequencies.
Ipsi frequencies: 500 Hz, 1000 Hz, 2000 Hz, 3000 Hz, 4000 Hz, WN, LP, HP.
Contra frequencies: 250 Hz, 500 Hz, 750 Hz, 1000 Hz, 1500 Hz, 2000 Hz, 3000 Hz, 4000 Hz, 6000
Hz, 8000 Hz, WN, LP, HP.
Autotest Max upper limit
Factory
110 dB
Range
From 90 dB to 110 dB in 5 dB steps.
Description Safety percussion to prevent the subject to get a higher output level than the level from this setup
item during an impedance auto test measurement.
AT235 Appendix C page 4
Default manual intensity
Factory
80 dB
Range
From 60 dB to 90 dB in 1 dB steps.
Description Start intensity level for manual impedance audiometry.
AGC for ipsi reflex stimuli
Factory
Off
Range
On or Off
Description If ear volume is smaller than 2 ml the AGC (Acoustic Gain Control) for ipsi reflex stimuli will correct
the level with the same level correction as for the AGC Probe tone control. The function will avoid too
high levels in ear with smaller ear volumes. If the ear volume is higher than or equal to 2 ml the AGC
Stimuli system will do nothing.
Advanced Audiometry User Setup
Advanced Audiometry User Setup. Figure 39
Audiometry Headset
Factory
TDH39
Range
TDH39 or EAR 3A.
Description Selects what headset to be used in audiometry menus. Note that by choosing another transducer
you may need to calibrate the transducer. The AT235 can hold calibration values for both
transducers.
Default intensity
Factory
30 dB
Range
Off, -10 to 50 dB in 5 dB steps
Description If Off is selected the instrument will behave as follows:
In manual audiometry the intensity it will hold its level when shifting transducer and will initially go to
30 when selecting the manual audiometry.
AT235 Appendix C page 5
In the HW test the intensity will always go to 40 dB no matter what the previous intensity was.
If a value is selected the instrument will behave as follows:
Entering on of the two menus or changing transducer the intensity will go to the selected level.
Not Heard Lines
Factory
On
Range
On or Off
Description Selects to draw line to not heard symbols or not.
Manual Audiometry
Audiometry Frequencies
Factory
All frequencies are selected as factory setting
Range
125 Hz, 250 Hz, 750 Hz, 1500 Hz, 3000 Hz, 6000 Hz and 8000 Hz can be selected as On or Off.
Description Use the frequency keys to select the desired frequency and press Change (F1) to select “On” or
“Off”.
Frequency Jump Mode
Factory
Bottom
Range
Bottom or Butterfly
Description Is used to select how the frequency jumps, when activating the frequency keys.
Bottom
Trying to increase the frequency selection beyond 8000 Hz, will cause the frequency to jump to 125 Hz, ready to
perform increasing frequency selection.
Butterfly
Trying to increase the frequency selection beyond 8000 Hz, will cause the frequency to jump to 1000
Hz, ready to perform decreasing frequency selection. Trying to decrease the frequency below the
lowest frequency will cause the frequency to go to 1000 Hz ready to perform increasing frequency
selection.
Tone switch
Factory
Man
Range
Man or Rev
Description Is used to select how the Toneswitch controls the sound stimulation.
Man
The sound is presented to the patient when the Toneswitch is activated.
Rev
The sound is presented continuously to the patient until the Toneswitch is activated.
AT235 Appendix C page 6
Intensity Stepdown
Factory
Off
Range
Off - 5 - 10 - 15 - 20 - 25 - 30 - 35 - 40 dB
Description Is used to select how much the Intensity is decreased when the frequency is changed.
HW Frequencies
Factory
All frequencies are “Off” as factory setting
Range
125 Hz, 250 Hz, 750 Hz, 1500 Hz, 3000 Hz, 6000 Hz and 8000 Hz can be selected as On or Off.
Description Use the frequency keys to select the desired frequency and press Change (F1) to select “On” or
“Off”.
Conditions
Factory
2 out of 3
Range
“2 out of 3” or “3 out of 5”
Description Is used to select the threshold method in ‘H.W. Test’. The possibilities are 2 responses out of 3
presentations, or 3 responses out of 5 presentations on the same dB value.
AT235 Appendix C page 7
Letter Printout Error (Internal printer)
Some of the internal printer modules (thermo printer) can loose their font data and therefore do printouts with errors
in the letters. If this error should occur please use this option to restore fonts in the internal printer module. Note! If
not the internal printer option is selected in the Common menu this menu item will be invisible
Press Print (F6) in the Advanced User Setup and follow the instructions on the screen.
Note! Before restoring the fonts a jumper must be placed on the printer interface board connector J3, see Printer
Connections for details.
Storing/Restoring the Setup
EEPROM Menu. Figure 40
The AT235 provides a tool for administrating the information stored in the setups. It can store, restore the setup
and initiate to factory settings either from this EEROM menu or restore setup data trough a key press during power
up.
When the setup of the instrument is done you can enter this menu and store all settings as an original setup. If a
user changes in some setup items and cannot get the instrument to work properly afterwards ask the person to
switch off power, hold down <shift>+<F4>, switch power on again and press “Yes” (F1) when the instrument asks
you to restore setup to original setup. By doing so you bring the setup back to the settings you stored before you
send it to the user.
You can also guide the user in to this EEPROM menu, but that requires you to tell the user the password.
Factory setting is our way of doing the setup.
AT235 Appendix C page 8
Appendix U - Update News
Following Improvements are made for instruments from no. 750659
New Main board complete assembled board PCA version 51007410 (PCB 69010807)
Compatible to previous version
Optimisation of the pump driver IC77
Following Improvements are made for instruments from no. 737336
New Main board complete assembled board PCA version 51007409
Compatible to previous version
Resistor R367 is modified to improve tolerance for flash programming
Following Improvements are made for instruments from no. 639427
Not compatible to previous versions
New Main board
Redesign for USB connection
New Keyboard
Connections for Main board modified
New Rear panel
Serial communication modified from RS232 to USB
New software version 2.00200
Following Improvements are made for instruments from no. 206321
Ferrites L1, L4, L6 and L7 are replaced with 0R resistors due to intermittent measurement errors after introducing
lead-free version of DSP.
All instruments shipped after 29.03.2006 have been modified, including some instruments with lower serial number
than 206321.
This modification is described in technical note 0602 dated 22.03.2006
Following Improvements are made for instruments from no. 189850
New Display
Compatible to previous Display
Fulfilling the RoHS directive
Inverter PCB is not longer mounted
0R resistor R204 is mounted
AT235 Appendix U page 1