Download SPHINX Project Twelve Service Manual

1.
SERVICE MANUAL
PROJECT TWELVE
MONO
POWER AMPLIFIER
SPHINX
Project Twelve
Service Manual
Contents
1. UNPACKING .......................................................................................................................................3
2. SPHINX WARRANTY CARD ..............................................................................................................3
3. CONTACTING THE MANUFACTURER .............................................................................................3
4. THE POWER AMP AT A GLANCE.....................................................................................................4
Front panel................................................................................................................................................... 4
Rear panel ................................................................................................................................................... 5
5. TECHNICAL SPECIFICATIONS .........................................................................................................6
6. GENERAL CHECKLIST......................................................................................................................7
Optical connections ..................................................................................................................................... 7
Switching the amp on................................................................................................................................... 7
Protection mode........................................................................................................................................... 7
Cables.......................................................................................................................................................... 7
7. USING THE AMP WITHOUT PROTECTION CIRCUIT......................................................................8
Removing the protection circuit board ......................................................................................................... 8
Repositioning the protection circuit board.................................................................................................... 8
8. ADJUSTMENT PROCEDURES..........................................................................................................9
Bias.............................................................................................................................................................. 9
Offset ......................................................................................................................................................... 10
Common mode .......................................................................................................................................... 10
9. PROBLEMS AND SOLUTIONS........................................................................................................11
10. DIAGRAMS AND PARTS LISTS ....................................................................................................12
Connection diagram for testing the project 12 ........................................................................................... 13
Schematic layout of project 12 with securityprint ....................................................................................... 14
Schematic layout of all relevant parts ........................................................................................................ 15
Project 12 amplifier diagram ...................................................................................................................... 16
Project 12 protection diagram.................................................................................................................... 17
PCB drawings of Project 12 ....................................................................................................................... 18
Partlist amplifier ......................................................................................................................................... 19
Partlist protection ....................................................................................................................................... 22
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SPHINX
Project Twelve
Service Manual
The Sphinx Project Twelve design
The Sphinx Project Twelve was designed for the
ever-increasing group of quality-conscious
audiophiles.
We are very proud of the tradition connected with
the SPHINX name, especially concerning audio
quality perfection.
This service manual will help you to optimally
service and repair the Sphinx Project Twelve Mono
Power Amplifier.
The design is based on the long experience of the
Sphinx design team with ultra-wide bandwidth
power FETs.
These have an unique and extremely wide power
bandwidth exceeding 1.5 MHz, a very high slew
rate of over 100 V/µs and an unequalled perfect
phase linearity over the complete frequency
bandwidth.
Six of these 100 W FETs are used to obtain
maximum reliability.
The extremely low output impedance results in a
damping factor of over 600!
Together with the very 'heavy' power supply and its
large energy buffer of 26,920 µF, this results in an
effortless sound with a very large dynamic range
and an unsurpassed transient response.
Much attention has also been paid to the physical
layout, the positioning of components and the
internal grounding. This results in an equivalent
input noise value of <1 µV (<-120 dBV): remarkable
for a pre-amp, but really astounding for a big power
amp with two transformers.
All of this means that the Project Twelve can work
with all kind of loads from every loudspeaker: even
the most difficult ones like electrostatic and
magnetostatic...
To obtain the maximum quality from this power amp
it is necessary to use it with top quality audio
components preferably with other Sphinx
components.
1. UNPACKING
Before leaving the factory every Project Twelve is
subjected to stringent and extensive technical and
exterior quality inspections. This ensures the user
many years of high quality audio from a perfectlooking product.
We recommend owners to ship the Project Twelve
in its original carton.
After unpacking the Project Twelve we therefore
recommend you carefully check it for any transport
damage.
If you find any damage and the product has not
been shipped in the original carton the ensuing
repair costs will not be covered by the warranty.
2. SPHINX WARRANTY CARD
To be entitled to any warranty repairs the owner
must have send the filled out warranty card to
Sphinx or a distributor where it has been registered.
Other regulations may apply in your specific
country: when in doubt, please consult the proper
authorities.
3. CONTACTING THE MANUFACTURER
In case of any problem not covered in this manual
or if you have other questions you may contact the
Sphinx International Service Department in The
Netherlands (local time: GMT +1h) during office
hours at the following numbers:
Telephone
Fax
E-mail
(+31) 35 602 0302
(+31) 35 602 2806
[email protected]
It is always very helpful and efficient if you have all
relevant information about the specific product and
the problem ready.
Please also refer to the User Manual of the
Project Twelve for information about
functions not described in this manual.
It is important to familiarise yourself with the
special functions, operation and possibilities
of the Sphinx Project Twelve.
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SPHINX
Project Twelve
Service Manual
4. THE POWER AMP AT A GLANCE
Front panel
1. LED: Indicates the selected function:
stand-by
red
on
green
protection
blinking red.
2. STANDBY: To switch the component on and off.
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SPHINX
Project Twelve
Service Manual
Rear panel
3.
BALANCED/UNBALANCED: With this switch
you may select the balanced input (5.) or the
unbalanced input (8).
4.
CONTROL IN: To connect the optical cable
from another Sphinx component like a pre-amp.
CONTROL OUT: To connect the optical cable
that goes to another Sphinx component.
5.
6.
MAINS: This is the combined mains master
switch (0/1) and input.
MAINS: To connect the power amp to a mains
outlet (230 - 240 VAC).
7.
OUTPUT: To connect the cable from the
loudspeaker:
red
+
white
-
8.
UNBALANCED INPUT: To connect the
unbalanced cinch cable from the pre-amp
output.
BALANCED INPUT: To connect the balanced
XLR cable from the pre-amp output.
Manufacturer's label: Here you'll find
important data on this component, such as
serial number and mains voltage to be used.
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SPHINX
Project Twelve
Service Manual
5. TECHNICAL SPECIFICATIONS
Bandwidth
Phase response error
Gain (balanced)
( unbalanced)
Minimum Power Output (1 - 20,000 Hz, 1 W = 0
dBW)
0 - 1.5 MHz (+0/-3 dB)
0 - 203,000 Hz after RF input filter
<1° (0 - 20,000 Hz)
29.5 dB max. (x 29.9)
29.5 dB max. (x 29.9)
Output voltage / current, max.
>151 W into 8 ohm (21.8 dBW), THD <0.01%
>246 W into 4 ohm (23.9 dBW), THD <0.01%
>340 W into 2 ohm (25.3 dBW), THD <0.01%
36 V / 16 A
THD+N (IHF-A)
IMD
S/N ratio (IHF-A)
<0.006% (100 W into 8 ohm, 1 - 20,000 Hz)
<0.010% ( 70 W into 8 ohm)
>120 dB
Slew rate
Common Mode Rejection Ratio
Damping factor
>20 V/µs
>30dB @ 100 Hz
>645 @ 10 Hz
>629 @ 100 Hz
>595 @ 1 kHz
>155 @ 10 kHz
Input
level, nominal
impedance
XLR balanced / cinch WBT unbalanced
1.25 V (1.9 dBV) / 1.25 V (1.9 dBV)
600 ohm
/ 20 kohm
Supply capacitance
Power consumption
26,920 µF total
600 W max. (5 W standby)
Power transformer, primary
secondary
230 VAC / 115 VAC
45 VAC / 3,33 A (2x)
Temperature protection
Maximum DC-offset
Short circuit protection
70 °C / 158 F
+350 mV and –350 mV
Measured at source resistor R31
Dimensions (h x w x d)
Weight
68 x 250 x 340 mm
6,5 kg
This unit conforms to the EMC interference regulations issued by the EU and to the CE standards.
This unit complies with safety regulation VDE 0860 and therefore with international safety regulation IEC 65.
Technical specifications may be changed by SPHINX without prior notice if technical developments make this
necessary.
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SPHINX
Project Twelve
Service Manual
6. GENERAL CHECKLIST
Before you test or service the Project Twelve
please check the following items. They will give
information about the current status of the amplifier.
Note: The Project Twelve will become warm, so
correct placement is critical. Do not position it on
top of or close to other heat-radiating equipment
(such as other power amps) or in direct sunlight.
Please ensure unrestricted ventilation around
the component.
Optical connections
The optical CONTROL IN (4.) is light-sensitive. A
strong light source might therefore activate the
CONTROL function and switch the Project Twelve
to Standby.
While this mode has priority the amplifier can not
be activated with the Standby switch at the front
panel.
Before you start connecting equipment it is always
wise to check whether all the mains cables of all
components are disconnected from the mains
outlets!
This will prevent any damage to the loudspeakers
and amplifiers caused by incorrect wiring or
settings.
Connect the mains cable after you have connected
all other components in the system and have
double-checked all connections.
If you use more than one Project Twelve connect
hem all to the same mains outlet and phase.
Switching the amp on
Before you switch the power amp on you should
always first:
• connect a pre-amp
• connect the pre-amp’s Control Out to the power
amp’s Control In
• or place the dummy plug in the Control IN
connector of the power amp.
After switching the amplifier ON the red LED (1.)
will first blink slowly (1x per second) and then will
light continuously.
The amp is now in Standby mode.
Pressing the Standby-button (2.) will activate the
amplifier and the LED turns to green.
Protection mode
If - after switching on - the red LED (1.) blinks
rapidly (2x per second) this indicates that the
protection mode is active.
This may be caused by one of the following
problems:
1. The operational temperature exceeds 70 °C.
2. The output DC-offset exceeds +/- 350 mV.
3. The output is shorted (current-limiter active)
Warning!
The output Short-circuit protection will be
activated at output currents of over 27A. At
lower output currents (AC or DC) the amplifier
has no direct protection. At continuous large
currents, the temperature protection will take
over.
4. Power supply voltage is wrongly connected or
low (for correct voltage see underside of PJ 12)
The protection mode will do the following things:
1. Disconnect the amplifier output.
2. Disconnect the amplifier input.
3. Reset the bias current to 0 mA.
The protection mode can only be deactivated by
switching the amplifier off with the Mains Switch (6.)
and leave it off for at least 30 seconds.
If the amplifier is switched on again within those 30
seconds the protection mode will automatically be
activated.
Note: This also happens if the amplifier worked
properly before switching it off!
Cables
Always use loudspeaker and audio cables and
connectors of the highest quality.
Siltech cable is used throughout internally and we
recommend using this same cable for all external
connections.
If you have the choice between longer loudspeaker
cables or longer audio cables, choose the latter
(cables between pre-amp and power amp will
cause the least signal quality loss).
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SPHINX
Project Twelve
Service Manual
Repositioning the protection circuit board
7. USING THE AMP WITHOUT
PROTECTION CIRCUIT
To adjust the internal controls of the Project Twelve
the protection circuit board may be removed.
This ensures that all adjustment points on the main
board are freely visible and accessible (instead of
through small openings in the protection circuit
board).
WARNING!
The amplifier may be used without the protection
circuit.
We do not recommend this however while this
prevents the output from being disconnected in
case of any malfunction.
SPHINX is not responsible for any damage
caused by the removal of the protection
circuit or the use of the amp without the
protection circuit!
Removing the protection circuit board
The protection circuit board is mounted on top of
the upper main printed circuit board of the amplifier.
The drawing “Schematic layout of project 12 with
securityprint” (page 14) shows the main board of
the Project Twelve with the protection circuit
including all the parts mentioned below. Use the
following steps:
1. Remove the top cover plate of the amp. It is
fixed with one hex screw (M4x12) at the rear
panel
2. Remove the two small screws (M3x6) of the
protection circuit board.
To reposition the protection circuit board you use
the steps from the previous “Removing the…”procedure but in reverse order.
1. Reposition the jumper from JP1 & JP2 to JP2 &
JP3.
If not, the protection circuit will not be able to
disconnect the amplifier’s output.
2. Position the board over the mounting positions
and stick the Balanced/Unbalanced button
through the appropriate opening in the rear
panel of the housing.
3. Carefully insert the rear connector into the
corresponding main circuit board socket and
then the front connector in it’s socket.
Attention:
Incorrectly positioned connectors may cause
damage to the Project Twelve and the pre-amp.
4. Fix the protection circuit board position with the
two small screws.
5. Solder the five wires to their correct positions
(position #1 is the one at the rear, see also the
drawing):
1) Red (+) wire from BALANCED IN
2) Red (+) wire from UNBALANCED IN
3) Black wire (ground) from BALANCED IN
4) Black wire (ground) from UNBALANCED IN
5) Blue (-) wire from BALANCED IN.
6. Solder the two PTC-resistors to the circuit
board.
7. Replace the top cover plate of the housing and
fix it with the hex screw.
3. Unsolder the five wires at the top-left corner
(Audio-IN).
4. Unsolder the two PTC-resistors (for the overtemperature protection at 70 °C).
5. Carefully remove the circuit board (there is only
one way of doing this due to the mounted
Balanced/Unbalanced switch):
a) Lift up the front side of the board so the large
connector is disconnected from the main circuit
board.
b) Lift the rear side of the board to disconnect
the other connector.
Now you may remove the board.
6. Connect the input signal to the main circuit
board with the special Servicing Cable (*).
(*) If there is no Servicing Cable available you may
make one yourself using a suitable connector.
Connect the wires as follows:
• Pin 1 (and 2) = negative signal: connect to blue
wire from Balanced In
• Pin 3 (and 4) = ground: connect to black wire of
both inputs
• Pin 5 (and 6) = positive signal: connect to red
wire of both inputs
The 6 pin connector at the main board then can be
used as the signal input.
7. Reposition the jumper from JP2 & JP3 to JP1 &
JP2.
The output relay now works without control
signal from the protection circuit.
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SPHINX
Project Twelve
Service Manual
8. ADJUSTMENT PROCEDURES
The Project Twelve has three adjustable settings:
1. Bias: to set the bias current of the power-FETs
2. Offset: to set the minimal DC voltage for the
output
3. Common Mode: to maximise the common
mode rejection of the balanced input
Re-adjustment of one or more might be necessary
due to ageing or when parts have been replaced or
repaired.
Attention:
When re-adjusting any setting please ensure that
there is no loudspeaker connected to the output!
Otherwise the loudspeaker may be seriously
damaged.
Bias
With this procedure you set the proper bias level for
the power FETs. This ensures their Class A
operation at low power levels.
Connect the amplifier according to the drawing
“conection diagram for testing the project 12” (page
13).
The input of the amplifier must be shorted (by way
of the MUTE function of the oscillator).
•
•
•
•
Attention:
The amplifier is able to generate high output
voltages of over + or -60 V.
Please be very careful during the adjustments!
After removing the top cover plate you will see the
three main sections of the amplifier:
1. The power transformer
2. The main printed circuit board holding the
actual audio amplifier
3. The protection circuit board responsible for
switching the Project Twelve on and off.
Switch the amplifier ON and wait until it has
reached the proper working temperature (this
takes an hour).
Set the millivolt-meter to the DC-range.
Place the two measuring clips of the meter
across one of the source resistors (R30, R31,
R39, R40, R43 or R45: see schematic at page
15).
The level should be 10 mV DC (±2 mV).
If not: adjust potmeter P2 until the level is
10 mV (P2 can be reached via the ‘bias’
adjustment hole in the protection circuit board).
Attention:
All source resistors must show the same 10 mV
value. If not this indicates that the FETs are not
accurately matched and their variance is too high.
This will cause offset- and bias-problems which can
be detected with a THD analyser as a very specific
type of distortion.
In that case you should replace the FET sextuplet
with a new one (3 matched ones and their inverse
counterparts): they can be ordered from SPHINX.
•
•
•
•
Switch the oscillator on and set it to 1 kHz and a
level of 0 dBu.
Check the distortion with a THD analyser: it
should be conform the specified values (0.006%
IHF-A @ 1 kHz).
If this is correct the procedure is finished.
You may now switch off the amplifier or
continue with another adjustment procedure.
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SPHINX
Project Twelve
Service Manual
Offset
Common mode
The Offset adjustment procedure minimises the DC
offset value of the amplifier output. This DC offset is
important when capacitive loads are used, such as
electrostatic loudspeakers. These loudspeakers
often use a very low-impedance step-up
transformer. The amplifier ‘sees’ this load as a
short for the DC voltage.
The Common mode adjustment procedure
minimises the amplification error of the (internal)
differential amplifier.
If the balanced input amplifier receives an identical
signal at the normal (+) and inverted (-) input the
output signal will be zero. This helps to reduce the
effect of external noise signals while these will be
induced at the same level in both signal
conductors.
The Common Mode adjustment is optimally set
during manufacturing (the error is as low as
possible).
Connect the amplifier according to the drawing
“Connection diagram for testing the project 12”
(page 13).
The input of the amplifier must be shorted (by way
of the MUTE function of the oscillator).
Attention:
Be careful not to trip the offset protection mode. It
will activate when the output DC offset exceeds +/350 mV.
This mode can only be reset by switching off the
amplifier with the Mains switch (6.) and switching it
on again after a waiting period of at least 30
seconds.
Please be careful during the adjustments!
•
•
•
•
•
•
•
•
Switch the amplifier ON and wait until it has
reached the proper working temperature (this
takes an hour).
Set the millivolt-meter to the DC-range.
Place the measurement clips of the meter over
the output terminal.
The level should not exceed +5 or -5 mV DC.
If not: adjust potmeter P1 until the level is within
this range (P1 can be reached via the ‘offset’
adjustment hole in the protection circuit board).
Switch the oscillator on and set it to 1 kHz and a
level of 0 dBu.
Check the distortion with a THD analyser: it
should be conform the specified values (0.006%
IHF-A @ 1 kHz).
If this is correct the procedure is finished.
You may now switch off the amplifier or
continue with another adjustment procedure.
Connect the amplifier according to the drawing
“Connection diagram for testing the project 12”
(page 13, except with both + and – input connected
to eachother, and use the special input connector.
This connector supplies both the plus (+) and
minus (-) input pins of the XLR with the same
signal.
The ‘balanced/unbalanced’-switch on the rear panel
must be set to ‘balanced’.
If there is no signal analyser available you may use
an oscilloscope at the output to view the waveform.
•
•
•
•
•
•
Switch the amplifier ON and wait until it has
reached the proper working temperature (this
takes an hour).
Switch the oscillator on and set it to 1 kHz and a
level of 0 dBu.
Adjust potmeter P3 until the minimum level is
set (P3 can be reached via the ‘bal.’ adjustment
hole in the protection circuit board).
When using a phase analyser the minimum
point is reached when the output phase
reverses 180° re. the input.
Also check the setting at 10 Hz, 100 Hz and
10 kHz. Readjust when necessary.
If the common mode is at minimum level at all
frequencies the adjustment is completed.
You may now switch off the amplifier or
continue with another adjustment procedure.
10
SPHINX
Project Twelve
9. PROBLEMS AND SOLUTIONS
At the moment of writing the Project Twelve has
one known specific problem.
If in the future you encounter any problem(s) you
may enter the info in this table. This table can then
be used for future reference.
Service Manual
Please also send (by fax or e-mail) the specific
information to the Sphinx International Service
Department (see page 3): this info can then be
added to the general database to aid others.
Problem
Cause
Solution
Protection is not functioning
properly,
Jumpercap is on JP1&JP2,
Amplifier is in ‘test’-mode
Place jumpercap on JP2&JP3
Refer to
page…
15
Cannot adjust common mode
properly,
Capacitor C2 is short-circuited,
Replace capacitor C2
16
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SPHINX
Project Twelve
Service Manual
10. DIAGRAMS AND PARTS LISTS
The next pages contain a complete set of schematic drawings including the associated parts lists (if applicable).
Connection diagram for testing the project 12 ........................................................................................... 13
Schematic layout of project 12 with securityprint ....................................................................................... 14
Schematic layout of all relevant parts ........................................................................................................ 15
Project 12 amplifier diagram ...................................................................................................................... 16
Project 12 protection diagram.................................................................................................................... 17
PCB drawings of Project 12 ....................................................................................................................... 18
Partlist amplifier ......................................................................................................................................... 19
Partlist protection ....................................................................................................................................... 22
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SPHINX
Project Twelve
Service Manual
Connection diagram for testing the project 12
Oscillator
x
Frequency
THD
y
Amplitude
time/div
gnd
out1
out2
gnd
inp1
inp2
THD out
inp1
inp2
(+)
N.C.
(-)
(+)
(-)
N.C.
Project Twelve
A
A
Voffset
13
SPHINX
Project Twelve
Service Manual
Pin 1 - input Pin 4 gnd
Pin 2 - input Pin 5 + input
Pin 3
gnd Pin 6 + input
screw
Offset
pin 6
Pin 5
screw
Large Connector
PTC-connector
Attached to heatsink
Security Print
Pin 22
Attached to heatsink
Negative BALANCED IN (blue)
Bal.
Small connector (audio in)
Pin assignment
pin 1
BIAS
Ground UNBALANCED IN (black)
Pin 1
Ground BALANCED IN (black)
Input wires
Positive UNBALANCED IN (red)
Pin 1
PTC-connector
Positive BALANCED IN (red)
Small connector
Schematic layout of project 12 with securityprint
Large connector Pin Voltage
Pin
Pin
Pin
Pin
Pin
Pin
1
2
3
4
5
6
5V
-2 V
-60 V
0V
-15 V
0V
Pin
Pin
Pin
Pin
Pin
Pin
7 0V
8 0V
9 0V
10 0 V
11 0 V
12 15 V
Pin
Pin
Pin
Pin
Pin
Pin
13
14
15
16
17
18
2 V Pin
0.7 V Pin
60 V Pin
0 V Pin
0V
0V
19
20
21
22
0
2
0
0
V
V
V
V
Project Twelve main board
14
SPHINX
Project Twelve
Service Manual
P3
R31
Source resistor
Com. mode
Schematic layout of all relevant parts
R43
Source Resistor
P1
Offset
R40
R39
Source resistor
Source resistor
Biasing
P2
R30
R45
Source resistor
Jp1
Jp2
Jp3
Source resistor
15
SPHINX
Project Twelve
Service Manual
Project 12 amplifier diagram
GND
+
39R
Q5
2SA970
39R
C141 C141 C140 C139
+
+
+
+
5mA
1.4mA
R1
C5
100 pF
100mA
100mA
C138 C137
C136
+
+
+
100mA
C112
C220nF/250V
4.15W
R49
470R / 2W
Q12
2SC4382
R28
100R
R37
100R
M14
2SK1529
opto+
R4
R41
100R
M17
2SK1529
M19
2SK1529
D6
1N4007
16
D3
ZY15V
18K
2SK389
Sub.
R18
3K3
R30
0.22R
opto-
R38
0.22R
R43
0.22R
R44
22K
P2
R3
604R
C6
100nF
200R
Q9
2SC2240
R10
22R
3.75mA
R24
5V
1K
3.93V
L1
R27
56R/2W
GND
R31
0.22R
R19
220R
R40
0.22R
R33
R45
0.22R
10R/5W
B
P3
100R
Sig1R46
604R
2.75mA
R26
GND
22R
R13
22K
Q4
GND
Q7
Q8
2SC2240
2SC1775
C14
100nF
+
D1
Q11
2SA1145
2SC2240
1.87V
C10
C9
100nF
R12
475R
100uF/16V
GND
2.95W
Agnd2
C15
220uF/100V
M20
2SJ200
5mA
R20
300R
R21
300R
R29
68R
R38
68R
R32
47R/2W
R34
10R/5W
C7
47nF
C8
330nF
D4
ZY15V
D7
1N4007
GND
Agnd1
4.15W
R11
1K
M18
2SJ200
R42
68R
2
Q13
2SA1668
R50
470R / 2W
GND
GND
70mA
100mA
100mA
100mA
100mA
C114
+
C113 C115
+
+
C116
+
C117 C118
+
+
C119
+
C126
C125
C123
C122
C120
R51
470R / 2W
C111
220nF/250V
R23
2R2
-60.5V
+
C1
1nF
M15
2SJ200
3.75mA
C124
+
Sig2-
1
EE-K-021
A
+
R9
22R
+
GND
C121
+
P1
200R
+
1K
C2
R2
220pF 18K
R48
470R / 2W
C4
100nF
D2
D1
R25
22R
1.4mA
100mA
GND
Q10
2SC2705
R14
18K
Q1
Sig1+
70mA
Q6
2SC1775
R5
22K
GND
Sig2+
R17
Q3
2SC1775
C3
1uF
R15
2.95W
Q2
C135
2R2
2SA970
9.3V
C134
R22
R16
56R
R6
120K
+
59V
59V
+
R8
820R
+
GND
R7
820R
C133
+
C12
100nF
C132
+
C11
220uF/100V
C131
C130
+
C129
60.5V
+
GND
Opto+
17
Bias
1
2SC1775
Opto1
A
a
GND
Opto-
B
b
+60V
Q16
R35
220R
1
R36
100R
C19
1N
D2
1N4148
D17
1N4007
RL1
REL1
14
16
SPHINX
Project Twelve
Service Manual
Project 12 protection diagram
2
+
19
GND
GND
+5V
5
14
X1
15
X2
C206
100n
NTC2-
IC282
RA0
RA1
RA2
RA3
RA4
4
R211
560R
6
7
8
9
10
11
12
13
RB0
RB1
RB2
RB3
RB4
RB5
RB6
/MCRL RB7
17
18
1
2
3
4k7
SIG-1
SIG-2
GND
16
1n
GND
NTC2+
-15V
C212
100n
C208
R203
4k7
R204
5
560R
100n
R208
4k7
GND
SIG-
R210
20 LED green
C203
100n
NTC1-
REL1B
GND
4k7
R224
390R
6
7
8
9
10
11
C211
100n
GND
C210
NTC1+
100n
100n
10µ/25V
18 LED red
560R
C209
1µ5/16V
R201
4k7
R202
C204
C203
+5V
3
VCC
Vout
GND
390R
+
R209
+5V
Vin
R223
C201
+5V
IC201
7805
1
GND
+15V
12
D201
OPTOUT
C213
100n
GND
+5V
R212
100k
GND
R2
2k2
AGND_1
R205
R206
10k
47k
+63V 15
INP1
INP3
AGND
PIC16C71
+5V
R207
4k7
R3
22k2
REL1C
GND
+5V
OVER CUR.
1
S1.2
R229
4k7
S1.1
R221
10k
10k
D202
2
D204
U200C
10
+5V
8
+ C219
330µ/6V3
9
GND
R231
390R
7
6
1N4148
GND
R232
10k
GND
4
D205
GND
LM324
14
13
REL1A
MT2 6V
11
12
GND
GND
Q204 GND
BC807
D203
BYD77
LM324
U200D
LM324
Q202
BC879
2k2
R216
2k2
R226
4k7
U200E
U200B
5
R215
GND
R225
1k
GND
LM324
16
R220
1M
14 RELAY
C216
100n
1N4148
560R
R214
2k2
GND
C217
100n
U200A
1
R222
Q203
BC807
R219
4k7
1N4148
3
R230
390R
D206
5V1
C218
100n
22
R213
17 STANDBY
C215
100n
R218
10k
C220
100n
STANDBY
SHA-2XWIS
D207
5V1
R217
V++MCLR RB6 RB7 Vss
4k7
21
R1
314R
DC detection
R234
4k7
GND
SIG+1
SIG+2
GND
GND
SIG+_1
SIG+
Q201
OPTIN
C214
100n
R235
1k
C207
100n
-15V
-15V
R227
1k
R228
1k
LM324
R233
4k7
-15V
17
SPHINX
Project Twelve
Service Manual
PCB drawings of Project 12
Because there is a significant image-quality loss during the conversion of the drawings, the PCB-drawings are
located in seperate files.
These files are in PDF-format (Adobé Acrobat 3.0 Reader).
•
•
Pj12Main.PDF for Mainboard
Pj12Protect.PDF for Protectionboard
18
SPHINX
Project Twelve
Service Manual
Partlist amplifier
Designator
Part Type
Description
C1
C10
C11
C111
C112
C113
C114
C115
C116
C117
C118
C119
C12
C120
C121
C122
C123
C124
C125
C126
C129
C130
C131
C132
C133
C134
C135
C136
C137
C138
C139
C14
C140
C141
C141
C15
C19
C2
C3
C4
C5
C6
C7
C8
C9
1nF
100uF/16V
220uF/100V
220nF/250V
C220nF/250V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
100nF
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
1000uF/100V
100nF
1000uF/100V
1000uF/100V
1000uF/100V
220uF/100V
1N
220pF
1uF
100nF
100 pF
100nF
47nF
330nF
100nF
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor Styroflex
Capacitor
Capacitor
Capacitor
Capacitor
D1
D17
D2
D3
D4
D6
D7
LED
1N4007
1N4148
ZY15V
ZY15V
1N4007
1N4007
LED
Diode
Diode
Zener diode
Zener diode
Diode
Diode
19
SPHINX
Project Twelve
Service Manual
Designator
Part Type
Description
L1
EE-K-021
Coil
M14
M15
M17
M18
M19
M20
2SK1529
2SJ200
2SK1529
2SJ200
2SK1529
2SJ200
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Opto1
OPTO COUPLER
Opto Coupler
P1
P2
P3
200R
200R
100R
Variable resistor
Variable resistor
Variable resistor
Q1
Q10
Q11
Q12
Q13
Q16
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
2SK389
2SC2705
2SA1145
2SC4382
2SA1668
2SC1775
2SC1775
2SC1775
2SC1775
2SA970
2SA970
2SC2240
2SC2240
2SC2240
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
R1
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R2
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R3
R30
R31
R32
1K
22R
1K
475R
22K
18K
39R
56R
39R
3K3
220R
18K
300R
300R
2R2
2R2
1K
22R
22R
56R/2W
100R
68R
604R
0.22R
0.22R
47R/2W
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor 2W
Resistor
Resistor
Resistor
Resistor 5W
Resistor 5W
Resistor 2W
20
SPHINX
Project Twelve
Service Manual
Designator
Part Type
Description
R33
R34
R35
R36
R37
R38
R38
R4
R40
R41
R42
R43
R44
R45
R46
R48
R49
R5
R50
R51
R6
R7
R8
R9
10R/5W
10R/5W
220R
100R
100R
0.22R
68R
18K
0.22R
100R
68R
0.22R
22K
0.22R
604R
470R / 2W
470R / 2W
22K
470R / 2W
470R / 2W
120K
820R
820R
22R
Resistor 5W
Resistor 5W
Resistor
Resistor
Resistor
Resistor 5W
Resistor
Resistor
Resistor 5W
Resistor
Resistor
Resistor 5W
Resistor
Resistor 5W
Resistor
Resistor 2W
Resistor 2W
Resistor
Resistor 2W
Resistor 2W
Resistor
Resistor
Resistor
Resistor
RL1
REL1
Relay
21
SPHINX
Project Twelve
Service Manual
Partlist protection
Designator
Part Type
Description
C201
C203
C203
C204
C206
C207
C208
C209
C210
C211
C212
C213
C214
C215
C216
C217
C218
C219
C220
10µ/25V
100n
100n
100n
100n
100n
1n
1µ5/16V
100n
100n
100n
100n
100n
100n
100n
100n
100n
330µ/6V3
100n
Electrolitic capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
Electrolitic capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
MKT capacitor
Electrolitic capacitor
MKT capacitor
D201
D202
D203
D204
D205
D206
D207
IC201
IC282
OPTOUT
1N4148
BYD77
1N4148
1N4148
5V1
5V1
LM7805
PIC16C71
optical output
DIODE
DIODE
DIODE
DIODE
ZENER DIODE
ZENER DIODE
Voltage regulator
Microcontroller
Q201
Q202
Q203
Q204
OPTIN
BC879
BC807
BC807
optical output
Transistor
Transistor
Transistor
R1
R2
R201
R202
R203
R204
R205
R206
R207
R208
R209
R210
314R
2k2
4k7
4k7
4k7
4k7
10k
47k
4k7
4k7
560R
560R
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
22
SPHINX
Project Twelve
Service Manual
Designator
Part Type
Description
R211
R212
R213
R214
R215
R216
R217
R218
R219
R220
R221
R222
R223
R224
R225
R226
R227
R228
R229
R230
R231
R232
R233
R234
R235
R3
560R
100k
560R
2k2
2k2
2k2
4k7
10k
4k7
1M
10k
10k
390R
390R
1k
4k7
1k
1k
4k7
390R
390R
10k
4k7
4k7
1k
22k2
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
REL1
MT2 6V
Relay
S1
SHA-2XWIS
Switch
U200
LM324
Quad OPAMP
©1998 Audioscript BV
Version: 3-09-1998
23