Download ViewSonic VA902 Service manual

Service Manual
ViewSonic VA902/b
Model No. VS10780
19” Color TFT LCD Display
(VA902/b_SM Rev. 1a Oct. 2005 )
ViewSonic“ 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright ¤ 2005 by ViewSonic Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular
purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time
to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or
changes.
Trademarks
Optiquest is a registered trademark of ViewSonic Corporation.
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Revision History
Revision
SM Editing Date
1a
10/20/2005
Description of Changes
ECR Number
Editor
G. Han
Initial Release
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TABLE OF CONTENTS
1. Precautions and Safety Notices
1
2.
Service Tools & Equipment Required
3
3.
Circuit Theory
4
4.
Disassembly & Assembly
15
5.
Test and Adjustment
19
6.
Troubleshooting
24
7.
Recommended Parts List
32
8.
Schematic Diagrams
42
9.
PCB Layout Diagrams
46
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1. Precautions and Safety Notices
1. Appropriate Operation
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
Turn off the product before cleaning.
Use only a dry soft cloth when cleaning the LCD panel surface.
Use a soft cloth soaked with mild detergent to clean the display housing.
Use only a high quality, safety approved AC/DC power cord.
Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off.
Do not touch the LCD panel surface with sharp or hard objects.
Do not place heavy objects on the LCD display, video cable, or power cord.
Do not use abrasive cleaners, waxes or solvents for your cleaning.
Do not operate the product under the following conditions:
- Extremely hot, cold or humid environment.
- Areas containing excessive dust and dirt.
- Near any appliance generating a strong magnetic field.
- In direct sunlight.
2. Caution
No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly familiar
with all of the following safety checks and servicing guidelines.
3. Safety Check
Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit, the voltage is
exposed in such areas as the associated transformer circuits.
4. LCD Module Handling Precautions
4.1 Handling Precautions
(1) Since front polarizer is easily damaged, pay attention not to scratch it.
(2) Be sure to turn off power supply when connecting or disconnecting input connector.
(3) Wipe off water drops immediately. Long contact with water may cause discoloration or spots.
(4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth.
(5) Since the panel is made of glass, it may break or crack if dropped or bumped on hard surface.
(6) Since CMOS LSI is used in this module, take care of static electricity and ensure human earth when handling.
(7) Do not open or modify the Module Assembly.
(8) Do not press the reflector sheet at the back of the module in any direction.
(9) In the event that a Module must be put back into the packing container slot after it was taken out of the
container, do not press the center of the CCFL Reflector edge. Instead, press at the far ends of the
CFL Reflector edge softly. Otherwise the TFT Module may be damaged.
(10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate or tilt the Interface
Connector of the TFT Module.
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(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist or
bend the TFT Module even momentarily. When designing the enclosure, it should be taken into consideration
that no bending/twisting forces may be applied to the TFT Module from outside. Otherwise the TFT Module
may be damaged.
(12) The cold cathode fluorescent lamp in the LCD contains a small amount of mercury. Please follow local
ordinances or regulations for disposal.
(13) The LCD module contains a small amount of materials having no flammability grade. The LCD module
should be supplied with power that complies with the requirements of Limited Power Source
(IEC60950 or UL1950), or an exemption should be applied for.
(14) The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit (IEC60950
or UL1950). Do not connect the CCFL to a Hazardous Voltage Circuit.
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2. SERVICE TOOLS & EQUIPMENT REQUIRED
1.
SIGNAL GENERATOR
2.
MULTIMETER
3.
SCREW DRIVER
4.
OSCILLOSCOPE
5.
Soldering IRON
6.
SOLDER
7.
VGA Cable (Black, 15pins point to point)
8.
Color Analyzer
9.
ISP Board
10. EDID Board
11. FOXISP. EXE file
12. EDID program file
13. Power Adapter output 5V/2A
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3. CIRCUIT THEORY
1. Block Diagram
Block Diagram
TFT LCD Panel 19"
12V
Lamp2
Panel Interface
2
Rectifier &
Filter Circuit
5V
Power
Lamp1
1
5V
AP2301
PMBT3906
LDO
5V-3.3V
5V-1.8V
24C16
Power
Transformer
Feedback
OVP
Transformer1
Panel Enable
On/Off
Brightness
On/Off
AOP605L
MCU
W78E65p
Rectifier &
Filter Circuit
OZ9910
Scaler
TSU16AK
Brightness
XTAL2
14.318MHz
LTV817
AOP605L
XTAL1
22.118MHz
Transformer2
Open
Protection
AC Line Filter
4
3
3
2
TOP246Y
OPP/OCP
24C02
1
4
Lamp3
Lamp4
AC Socket
AC Input 90V-264V
Keypad
Connector
VGA Connector
Keyboard
VGA Input
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2. Electronic Circuit Theory
2.1 Switching Mode Power Supply
2.1.1 AC Current Input Circuit
P801 is a connector for connecting AC Power. F801 is a fuse to protect all the circuit. AC input voltage is
from 100V to 240V. R820 and R821 joined between two inputting main circuit to prevent man from
shock. L801 is used to clear up low frequency wave. C801 and C806 are used to discharge the waves that
L801 produced. High frequency waves are damped by C801 and C806. D801 is a rectifier which
composed of 4 build-in diodes, it inverts AC to DC.
2.1.2 High Voltage to Low Voltage Control Circuit
C805 is used to smooth the wave from rectifier. IC802 is a highly integrated PWM controller, which
build-in a power MOSFET. When rectified DC high voltage is applied to the DRAIN pin during start-up,
the MOSFET is off initially, and the CONTROL pin capacitor is charged through a switched high voltage
current source connected internally between the DRAIN and CONTROL pins. When the CONTROL pin
voltage Vc reaches approximately 5.8V, the control circuitry is activated and the soft-start begins. The
soft-start circuit gradually increases the duty cycle of the MOSFET from zero to the maximum value over
approximately 10ms. If no external feedback/supply current is fed into the CONTROL pin by the end of
the soft-start, the high voltage current source is turned off and the CONTROL pin will start discharging in
response to the supply current drawn by the control circuitry.
Resistor R803, R807, R824 and R825 are for line over voltage shut-down (OVP) and line under-voltage
detection (UVP).Resistors R801, R805, R822, and R823 are for external current limit adjustment, and
used to reduce the current limit externally to a value close to the operating peak current of primary about
1.35A. The mean is power will protected when the primary current over about 1.35A.
When PWM is turned off, the main current flow will be consumed through D804 and ZD802, This will
prevent MOSFET which built-in IC802 from being damaged under large current impulse and voltage
spike.
D806 and C815 provide internal Auxiliary current to CONTROL pin during normal operation. In addition,
error amplifier and feedback current to the CONTROL pin are for duty cycle control.
2.1.3 DC_5V and DC_14V Output Circuit
For DC 5V, D805 is used to rectify the inducted current. R806 and C811 are used to store energy when
current is reversed. The parts including C812, C814, C822, C821, B801 and L803 are used to smooth the
current waves.
For DC 14V, D803 is used to rectify the inducted current. R802 and C802 are used to store energy when
current is reversed. The parts including C808, C810 and L802 are used to smooth the current waves.
2.1.4 Feedback and OVP Protect Circuit
Pin R of IC803 is supplied 2.5V stable voltage. It is connected to 5V and 14V output through R811, R810
and R818. R811, R810 and R818 are output sampling resistor. When the sampling voltage more than 2.5V
or less than 2.5V, feedback current of IC802 will change, this can change the voltage from transformer
T801.
For 5VDC output OVP, ZD803 is a zener diode, when 5V output voltage becomes up to 5.6V, the zener
current cause R819 voltage become up to 0.7V, Q801 is triggered and OVP starts. For 14VDC output OVP,
ZD804 is a Zener Diode, when 14V output voltage becomes up to 16V, the zener current cause R819
voltage become up to 0.7V, Q801 is triggered and OVP starts. The collector current of Q801 is used to
make build-in diode light. FB Current of IC802 will be changed; it can change the voltage from T801.
Q802, R827, R828 and ZD801 make up of dummy loading circuit. For start-up sequence, during 5V
output take place high loading first, this dummy loading circuit operated to insure 14V not be increased.
2. 2 Inverter circuit
2.2.1 Low voltage to high voltage circuit
14VDC supplies the power to IC501 through F501; the control signals that BRIGHTNESS and ON/OFF
come from I/F board. ON/OFF signal connect to pin8 of IC501 and makes IC501 enabled. BRIGHTNESS
is connected to pin7 of IC501 to adjust the panel luminance. R524, R529, C505 make up of a delay-time
circuit and R528, R523, R524 make up of a voltage divided circuit. C504 is used to filter the high
frequency noise. The operation frequency is determined by R522 and C529. For BURST MODE, its
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dimming frequency is determined by R527 and C506. C502 is used for soft start and compensation, C502,
C528 are used to filter noise.
The output drives, including NDR4, NDRV2, PDRV3, PDRV1 (pins1, 3, 15, 16 respectively), generate a
square pulses to drive MOSFET U501, U502. And U501, U502 works as full-bridge topology, it is high
efficient, zero voltage switch.
During start up, VSEN (pin9) detects the voltage at the transformer secondary. When VSEN reaches 3.0V,
the output voltage is regulated. If no current is detected for around 1.5 seconds, IC501 will shut down.
The current flowing through CCFL is detected and regulated through sense resistor R509, R511. The
feedback voltage through R506, R507, and C508 connected to Pin11 (ISEN), and then compared with a
reference voltage (1.5V) via a current amplifier, resulting in PWM drive outputs to full-bridge switches.
2.2.2 Protection circuit
Over Voltage Protection: R501and R502 are connected in high voltage output connector, the divided AC
voltage is inverted DC voltage through D508, R505 and C507are used to rectify wave & dump noise.
Then the voltage signal reaches Pin9 VSEN of IC501, when the voltage changes, build-in PWM of IC501
will adjust output voltage.
Open Lamp Protection: In normal operation, the resistors R510, R511, R512, R509 are sensed a high level
AC voltage, the AC signal IS1 invert DC voltage through D509, R515, C533, and the high level DC
voltage reaches the gate pin of Q502, similarly, the gate pin of Q503, Q504, Q505 has high level DC
voltage. So the gate pin of Q501 has a low level voltage, and the IC501 is normal operation. Once one
of signal IS1, IS2, IS3, and IS4 is low, the voltages of Q501 gate pin is high level, and make the voltage of
ISEN low level, the IC501 will shut down.
2.3 I/F Board Circuit
2.3.1 Power Input
+5V is from the power board and supply for U101(FS8860-18PJ)﹑U102(FS8860-33PJ)﹑
U105(MCU:W78E65P) and panel. +3.3V output is generated from +5V through C169 and C102 filtering,
and U102 outputs. +3.3V is used for U104 (Scaler: TSU16AK). +1.8V output is generated from +5V
through C169, C105 and C102 filtering, and U101 outputs. +1.8V is also used for U104.
2.3.2 MCU (W78E65P)
VDD is +5V and its frequency of XTAL1 is 22.1184MHz. U105 #2 is defined as panel-enable. When the
I/O port is low, Q101 and Q102 are conducted. And then after C109 and C110 filtering, obtain the voltage
of VLCD, which will be connected to CN103. U105 #3 is defined as CCFL-enable. When the I/O port is
low, Q103 is pulled up and the backlights are on; When the I/O port is high, Q103 is conducted and the
backlights are off. U105 #4 is defined as DET-VGA, connected with CN102 #5. U105 #14, #36, #37, #38,
#39, #40, #41, #42, #43 are the communications with U104 (Scaler), which are connected to #72, #31,
#78, #77, #30, #70, #71, #69, #32 of Scaler. U105 #43 outputs reset signal to U104 (Scaler).
U106 is EEPROM used for saving EDID data, which is connected by SCL and SDA pins with #16 and
#17 of MCU. Connect #12 to #26 of U105 for ISP.
2.3.3 Scaler (TSU16AK)
The frequency of XTAL2 is 14.318MHz. U104 #1, #102-#103, #106-#113, #118-#125, #128 output
LVDS digital data of 8 bit to panel control circuit through CN103. U104 #73 generates a PWM waveform
by regulating the duty to control the brightness of the backlights. U104 #30-#32, #69-#72, #77-#78 are the
communications with U105 (MCU) that are connected to #36-#43 of MCU. These communications
include HWRESET, CSZ/ALE, SCL/RDZ, SDA/WRZ, and AD0-AD3.
2.3.4 VGA Input
Signal R, G, B, SOG input through CN102 #1, #2, #3, and C115, C116, C117 and C118 filtering the high
frequency noise. Signal HSYNC and VSYNC input through CN102 #13 and #14, and C119, R119, C120,
R120 filtering. Then the analog signal enters U104, and then U104 deals with it internally. In addition,
TVS101, TVS102, TVS103 (the three are BAV99), TVS104, TVS105, TVS106, TVS107 (they are
constant voltage diode of 5V6) are ESD protector. Signal DDC-SCL inputs via CN102 #15, and then
passes through TVS107 for ESD protection, goes into EDID EEPROM IC U103. Signal DDC-SDA inputs
via CN102 #12, and then passes through TVS106 for ESD protection, goes into EDID EEPROM IC U103.
CN102 #5 is defined as cable detect pin, this detector realizes via R107 and U105 #4. The PC-5V of U103
is supplied by PC via CN103 #9 with D103 for ESD protection, or supplied by Monitor self via
D104.U103 is an EEPROM IC, which is a kind of memory and used for saving EDID data.
2.3.5 Button Control
Button “Key-Power” is defined as power on/off, which is connected to U105 #24 through CN106 #4.
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Button “Key-2” is defined as two functions of selecting and adjustment, which is connected to U105 #25
through CN106 #1.
Button “Key-Up” is defined as plus, which is connected to U105 #26 through CN106 #3.
Button “Key-Down” is defined as minus, which is connected to U105 #27 through CN106 #5.
Button “Key-1” is defined as two functions of menu and exit, which is connected to U105 #28 through
CN106 #2.
LED indicator on the front bezel is defined as follows:
a. When press button “Key-Power”, U105 #6 is pulled down and U105 #7 is pulled high, so Q104 is
conducted and the LED indicator is green.
b. When in power-saving mode, U105 #6 is pulled high and U105 #7 is pulled down, so Q105 is
conducted and the LED indicator is orange.
3. FACTORY PRESET TIMING TABLE
Item
Resolution
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
640 x 350
640 x 400
640 x 400
640 x 480
720 x 400
800 x 600
832 x 624
1024 x 768
1152 x 870
1280 x 1024
1280 x 720
H-Freq.
(KHz)
31.5kHz
31.5kHz
31.5kHz
24.7kHz
31.5kHz
35.0kHz
37.9kHz
37.5kHz
43.27kHz
31.5kHz
35.1kHz
37.9kHz
48.1kHz
46.9kHz
53.7kHz
49.7kHz
48.4kHz
56.5kHz
58.1kHz
60.0kHz
68.67kHz
68.6kHz
63.4kHz
79.97kHz
45kHz
V-Freq.
(Hz)
70Hz
60Hz
70Hz
50Hz
60Hz
67Hz
72Hz,
75Hz,
85Hz
70Hz
56Hz
60Hz
72Hz
75Hz
85Hz
75Hz
60Hz
70Hz
72Hz
75Hz
85Hz
75Hz
60Hz
75Hz
60Hz
Dot Clock
(MHz)
25.2
25.2
25.2
19.8
25.2
30.2
31.5
31.5
36.0
28.3
36.0
40.0
50.0
49.5
56.3
57.3
65.0
75.0
78.5
78.8
94.5
100
108
135
74.2
4. Power On/Off Sequence
4.1 Hardware Power ON
When power cord is plugged into AC socket, SMPS starts work and provides U105 and U106 with
VCC5V. When VCPU inputs to U105, U105 resets circuit active, sets U105 all registers to preset modes,
and then U105 #43 sends out a HWRESET signal voltage to reset U104, and then monitor goes into
stand-by mode. That means hardware power on has been completed.
4.2 Software Power ON/OFF
When press power key, U105 #24 recieves low pulse, and sends out “Power on/off” order back to U104,
and then U104 will do the power on/off.
If Power ON, U105 #6 (LED_Green) will send out High potential, and then LED green on.
If Power OFF, U105 #7 (LED_Orange) will send out High potential, and then LED Orange on.
The Panel_Vcc, Backlight_En, CLK/DATA output to panel will follow the following sequency.
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T1 (ms)
0.1~10
T2 (ms)
0~10
T3 (ms)
>200
T4 (ms)
>100
T5 (ms)
0~50
T6 (ms)
0.1~10
T7 (ms)
>1000
3
5. AC Outlet Pin Assignment
2
1
Pin
Symbol
Description
1
L
Live
2
N
Neutral
3
E
GND
P801
6. Inner Connector Pin Assignment
6.1 CN501, CN502, CN503, CN504 (Connect to Panel Backlight, SM02B-BHSS-1-TB or equivalent)
Pin
Symbol
Description
1
2
H.V.
L.V.
High voltage for lamp
Low voltage for lamp
6.2 CN101 (Power BD to Interface BD)
Pin No.
1,2
3,6
4
5
Symbol
+5V (VCC5V)
GND
BRIGHTNESS
ON/OFF
Description
+5.2V output
Ground
Brightness Control
CCFL on/off Control
6.3 CN106 (Interface BD to Keypad)
Pin No.
Symbol
1
2
3
4
5
6
7
8
KEY_SELECT/AUTO
KEY_MENU/EXIT
KEY_UP
KEY_POWER
KEY_DOWN
LED_GREEN
GND
LED_ORANGE
Description
Select control and auto adjustment control
OSD page selection and exit
OSD “▲” control to adjust value to increase
DC power on/off control
OSD “▼” control to adjust value to decrease
Green LED lighting control
Ground
Orange LED lighting control
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6.4 CN103 (Connect I/F BD to panel, FI-X30S-H or Equivalent)
Pin No.
Symbol
Function
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
27
28
29
30
RXO0RXO0+
RXO1RXO1+
RXO2RXO2+
GND
RXOCRXOC+
RXO3RXO3+
RXE0RXE0+
GND
RXE1RXE1+
GND
RXE2RXE2+
RXECRXEC+
RXE3RXE3+
GND
GND
GND
GND
minus signal of odd channel 0(LVDS)
plus signal of odd channel 0(LVDS)
minus signal of odd channel 1(LVDS)
plus signal of odd channel 1(LVDS)
minus signal of odd channel 2(LVDS)
plus signal of odd channel 2(LVDS)
Ground
minus signal of odd clock channel (LVDS)
plus signal of odd clock channel (LVDS)
minus signal of odd channel 3(LVDS)
plus signal of odd channel 3(LVDS)
minus signal of even channel 0(LVDS)
plus signal of even channel 0(LVDS)
Ground
minus signal of even channel 1(LVDS)
plus signal of even channel 1(LVDS)
Ground
minus signal of even channel 2(LVDS)
plus signal of even channel 2(LVDS)
minus signal of even clock channel (LVDS)
plus signal of even clock channel (LVDS)
minus signal of even channel 3(LVDS)
plus signal of even channel 3(LVDS)
Ground
Ground
Ground or Open
Ground
VCC
VCC
VCC
Power supply (5.0 V)
Power supply (5.0 V)
Power supply (5.0 V)
6.5 CN102 (D-SUB Connector)
Pin
1
2
3
4
5
Symbol
Red video input
Green video input
Blue video input
NC
Cable Detect
Pin
6
7
8
9
10
Symbol
Red GND
Green GND
Blue GND
+5V(from PC)
GND
Pin
11
12
13
14
15
Symbol
NC
Serial data (SDA)
H / H+V SYNC
VSYNC
Data clock line (SCL)
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7. Key Parts Pin Assignment
7.1 IC802 (TOP246Y, Power Control IC)
Pin
Symbol
I/O
1
2
3
4
5
6
C
L
X
S
F
D
I
I
I
O
I
I
Description
Control
Line Sense
External Current Limit
Source of MOSFET(GND)
Frequency
Drain of MOSFET
7.2 IC501 (OZ9910G, CCFL inverter controller IC)
Pin No.
Symbol
I/O
Description
1
NDRV4
O
Bottom MOSFET gate drive output in dual forward converter
2
PGND
High-current power ground
3
NDRV2
O
Bottom MOSFET gate drive output in dual forward converter
4
GNDA
5
6
7
8
CT
LCT
ADJ
ENA
9
Low-current signal ground
Timing capacitor of high frequency oscillator
Timing capacitor of set LPWM frequency
Control command input –DC
Enable input
VSEN
I
I
I
I
I
10
CMP_SST
I
Soft start and loop compensation capacitor
11
ISEN
I
Current sense feedback
12
VREF
O
Reference voltage output
13
VIN
I
Supply voltage for IC
14
HSB
I
High side driver buffer output
15
PDRV3
Top MOSFET gate drive output in dual forward converter
16
PDRV1
O
O
Voltage sense feedback
Top MOSFET gate drive output in dual forward converter
7.3 U104 (TSU16AK)
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Symbol
LVBOM
GND
BYPASS
NC
NC
BUSTYPE
NC
NC
NC
GND
VDDP
NC
NC
NC
NC
NC
NC
VDDC
GND
I/O
Description
B-Link Negative LVDS Differential Data Output
Ground
For External Bypass Capacitor
Not connected
Not connected
Low : Serial bus; High : Direct bus
Not connected
Not connected
Not connected
Ground
Digital Output Power
Not connected
Not connected
Not connected
Not connected
Not connected
Not connected
Digital Core Power
Ground
O
IN
O
I
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Pin
Symbol
I/O
Description
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
GND
VDDP
NC
NC
NC
NC
NC
NC
NC
NC
AD0
AD3
HWRESET
XIN
XOUT
AVDD_MPLL
GND
HSYNC0
VSYNC0
GND
NC
NC
GND
NC
NC
VDD_ADC
NC
NC
GND
NC
NC
VDD_ADC
REXT
AVDD PLL
GND
AVDD ADC
GND
BINOM
BINO
GINOM
Ground
Digital Output Power
Not connected
Not connected
Not connected
Not connected
Not connected
Not connected
Not connected
Not connected
DDR direct bus AD0; 4mA driving strength
DDR direct bus AD3; 4mA driving strength
Hardware reset; active high
Crystal Oscillator Input
Crystal Oscillator Output
MPLL Power
Ground
Analog HSYNC input
Analog VSYNC input
Ground
Not connected
Not connected
Ground
Not connected
Not connected
ADC Power
Not connected
Not connected
Ground
Not connected
Not connected
ADC Power
External resistor 390 ohm to AVDD ADC
PLL Power
Ground
ADC Power
Ground
Reference ground for analog blue input
Analog blue input
Reference ground for analog green input
60
61
62
63
64
65
66
67
68
69
70
GINO
SOGIN0
RINOM
RINO
GND
AVDD_ADC
REFP
REFM
GND
ALE/CS
WRZ/SDA
71
RDZ/SCL
I
DDR direct bus RDZ; active low
72
73
INT
PWM0
O
O
CPU interrupt; 4mA driving strength
PWM0; 4mA driving strength
O
I/O
I/O
I
I
O
I
I
I
I
I
I
I
I
I
Analog green input
I
I
I
I
Sync-on-green input
Reference ground for analog red input
Analog red input
Ground
ADC Power
Internal ADC top de-coupling pin
Internal ADC bottom de-coupling pin
Ground
DDR direct bus ALE; active high
DDR direct bus WRZ; active low
I
I
I/O
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VA902/b
Pin
Symbol
I/O
Description
74
75
76
77
PWM1
NC
NC
AD1
O
I/O
PWM1; 4mA driving strength
Not connected
Not connected
DDR direct bus AD1; 8mA driving strength
78
AD2
I/O
DDR direct bus AD2; 8mA driving strength
79
NC
Not connected
80
NC
Not connected
81
NC
Not connected
82
NC
Not connected
83
NC
84
VDDP
Not connected
Digital Output Power
85
GND
Ground
86
GND
87
VDDC
Ground
Digital Core Power
88
NC
Not connected
89
NC
Not connected
90
NC
Not connected
91
92
93
94
95
96
97
98
99
100
101
102
NC
NC
NC
VDDP
GND
GND
VDDC
NC
NC
NC
NC
LVA3P
103
104
105
106
LVA3M
VDDP
GND
LVACKP
O
O
Not connected
Not connected
Not connected
Digital Output Power
Ground
Ground
Digital Core Power
Not connected
Not connected
Not connected
Not connected
A-Link Positive LVDS Differential Data Output
A-Link Negative LVDS Differential Data Output
107
LVACKM
O
Digital Output Power
Ground
A-Link Positive LVDS Differential Clock Output
A-Link Negative LVDS Differential Clock Output
108
LVA2P
O
A-Link Positive LVDS Differential Data Output
109
LVA2M
O
A-Link Negative LVDS Differential Data Output
110
LVA1P
O
A-Link Positive LVDS Differential Data Output
111
LVA1M
O
A-Link Negative LVDS Differential Data Output
112
LVA0P
O
A-Link Positive LVDS Differential Data Output
113
LVA0M
O
A-Link Negative LVDS Differential Data Output
114
VDDP
O
Digital Output Power
115
GND
Ground
116
GND
Ground
117
VDDC
118
LVB3P
Digital Core Power
B-Link Positive LVDS Differential Data Output
O
I
O
I
O
O
O
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VA902/b
Pin
Symbol
I/O
Description
119
LVB3M
O
120
LVBCKP
O
B-Link Negative LVDS Differential Data Output
B-Link Positive LVDS Differential Clock Output
121
LVBCKM
O
B-Link Negative LVDS Differential Clock Output
122
LVB2P
O
B-Link Positive LVDS Differential Data Output
123
LVB2M
O
B-Link Negative LVDS Differential Data Output
124
LVB1P
O
B-Link Positive LVDS Differential Data Output
125
LVB1M
O
B-Link Negative LVDS Differential Data Output
126
VDDP
O
Digital Output Power
127
GND
128
LVBOP
O
Ground
B-Link Positive LVDS Differential Data Output
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7.4 U105 (Micro-controller: W78E65P-40)
Pin
Symbol
I/O
1
P4.2/INT3
2
P1,0/T2
O
3
P1.1/T2EX
O
4
P1.2
I
5
P1.3/PWM0
O
6
P1.4/PWM1
O
7
P1.5/PWM2
O
8
P1.6/PWM3
9
P1.7/PWM4
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
RST
P3.0/RXD
P4.3/INT2
P3.1/TXD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
XTAL2
XTAL1
GND
P4.0
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15
PSEN
ALE
P4.1
EA
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
+5V
Description
A bi-directional I/O port with alternate function.
Enable panel power on
Enable CCFL work
VGA cable detection
provide alternated function of PWM Volume
provide alternated function of PWM Green LED
provide alternated function of PWM Orange LED
Function is the same as that of standard 8052
Function is the same as that of standard 8052
I
Reset control pin
SCL line of I2C for EDID, debug function
PORT 4: A bi-directional I/O port with alternate
SDA line of I2C for EDID, debug function
Interrupt request control pin
Shut Down Volume Mute
I
O
O
I/O
SCL line of I2C communication with EEPROM
SDA line of I2C communication with EEPROM
DVI cable detection
EEPROM write protection control for DVI EDID
I
O
Crystal 22.1184MHz In
Crystal 22.1184MHz out
Sink voltage ground
A bi-directional I/O port with alternate function.
DC power on/off control
OSD “►” control to adjust value to increase
OSD “◄” control to adjust value to decrease
Selection of menu command listed
OSD page selection
Auto adjustment control
A bi-directional I/O port with internal pull-ups
A bi-directional I/O port with internal pull-ups
Program Store Enable
Address Latch Enable
A bi-directional I/O port with alternate function
External Access Enable
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
I
DDR Direct Bus Communication with Scaler
DDR Direct Bus Communication with Scaler
DDR Direct Bus Communication with Scaler
DDR Direct Bus Communication with Scaler
WRZ line of DDR Direct Bus
RDZ line of DDR Direct Bus
ALE line of DDR Direct Bus
Hardware reset to Scaler
+5V for MCU working voltage
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4. Disassembly & Assembly
1. Exploded Diagram and Spare Parts List
ViewSonic Corporation
Model
Title
Date
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VA902/b
Rev:
EXPLODED PARTS LIST (VA902/b-1)
ViewSonic Model Number: VS10780-1W
Rev: 1a
Serial No. Prefix: PSS / PSW
Item
ViewSonic P/N
1
C-00003659/C-00003677
1-1
#N/A
1-2
#N/A
1-3
#N/A
1-4
#N/A
1-5
#N/A
2
#N/A
2-1
2-2
B-00003172
2-3
#N/A
2-4
#N/A
2-5
2-6
2-7
HW-00003169
2-8
HW-00003171
2-9
2-10
2-11
2-12
#N/A
2-13
#N/A
2-14
M-00003165
3
C-00003660
3-1
#N/A
3-2
#N/A
3-3
#N/A
4
C-00003658
4-1
#N/A
4-2
#N/A
4-3
HW-00003667
4-4
PL-00003053
5
C-00003657
6
HW-00003664
7
HW-00003663
8
#N/A
9
HW-00003665
10
HW-00003167
11
HW-00003666
12
Ref. P/N
714030002500/10
506102000400
506102000300
501010202900/10
501120101500
501030202200
714072841100
502090301300
502020101700
502020101710
509146305300
509000000700
511100001500
506381000700
505040202000
714050002500
501020203500
506102000500
502080300300
714020002500
501240201200
502170100500
509112605300
503020002600
501020203400
502060000110
502060000100
505040202100
509112612501
509212610300
509142716500
Description
Q'ty
Bezel Sub-assm,VA902/b
1
LOGO PLATE,VIEWSONIC,LE1709(THREE BIRDS)
1
LOGO PLATE, VIEWSONIC,LE1709
1
1
BEZEL,FORNT,LE1909(Silver877C)/(Midnight Gray)
LENS,LE1909
1
BUTTON,FUNCTION KEY,LE1909
1
Panel Sub-Ass'y VA902/b HST
1
Panel HST
1
CHASSIS,LE1709
1
BRACKET,LEFT,LE1909
1
BRACKET,RIGHT,LE1909
1
IF BOARD ASS'Y
1
POWER BOARD ASS'Y
1
SCREW,PW,CROSS,W/WAS,M3*5,NI
14
BOLT,#4-40x11.8,NI
2
LVDS CABLE LE1909
1
1
KEYPAD CABLE LE1909
HRN ASS'Y 1P 157MM BLACK,UL 1007#20
1
SADDLE FOR CABLE
1
ACE TAPE,30000*45MM,3000PCS/FOIL
1/3000
INSULATOR,MYLAR,L79.9xW62.7MM,CHASSIS,LE1708 1
BACK SUB-ASS'Y
1
COVER,BACK,LE1909(MIDNIGHT GRAY)
1
LOGO PLATE,VIEWSONIC,LE1709(ELLIPSE)
1
SUPPORT VESA LE1709
1
BASE SUB-ASS'Y
1
BASE,LE1909(MIDNIGHT GRAY)
1
PLATE,BASE,LE1909
1
SCREW,P,CROSS,P.T-4*5,NI
2
RUBBER,FOOT,OD14xT2.5MM,3M,LE1909
5
COVER,HINGE,LE1909
2
HINGE,RIGHT,LE1909
1
HINGE,LEFT,LE1909
1
INSULATOR,MYLAR,L35xW16MM,HINGE LEFT,LE1909 1
SCREW,P,CROSS,T.T-4*12,BLK(HEAD 7.8MM)
4
SCREW,F,CROSS,T.T-4*10,NI
4
SCREW,P,CROSS W/WAS,T.T-5*16,BLACK
4
KEYPAD ASSM
1
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VA902/b
2.
Disassembly Block
BEZEL
SUB-ASSM(G/S
)
BASE SUB-ASSM *1
(SCREW,P,CROSS,M5*16, Ni*4)
BUTTON FUNCTION KEY*1
HINGE COVER*2
FRONT BEZEL (G/S)*1
LED LENS*1
BEZEL SUB-ASSM *1
(SCREW,P,CROSS,T4*12, BLK*4)
BACK COVER
SUB-ASS’Y
SUPPORT VESA *1
HINGE,RIGHT*1
HINGE,LEFT*1
(SCREW,F,CROSS,T4*10, Ni*4)
BACK COVER *1
BACK COVER SUB-ASS’Y*1
BASE COVER
SUB-ASS’Y
BRACKET_R*1
GROUND WIRE*1
KEYPAD CABEL*1
KEYPAD ASSM*1
(SCREW,PW,CROSS,M3*5, Ni*4)
(Ace tape*1)
PLATE BASE *1
BASE COVER *1
HSD or QDI PANEL*1
BRACKET_L*1
(SCREW,PW,CROSS,M3*5, Ni*4)
IF BOARD*1
POWER BOARD*1
FFC CABLE*1
CLIP,WIRE*1
(SCREW,PW,CROSS,M3*5, Ni*4)
(BOLT, #4-40x11.8, Ni*2)
CHASSIS*1
INSULATOR,MYLAR*1
NOTE: The arrow is the direction of disassembly.
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3. Assembly Block
CHASSIS*1
FRONT BEZEL (G/S)*1
LED LENS*1
LOGO PLATE,THREE BRID*1
BUTTON FUNCTION KEY*1
INSULATOR,MYLAR*1
IF BOARD*1
POWER BOARD*1
FFC CABLE*1
CLIP,WIRE*1
(SCREW,PW,CROSS,M3*5, Ni*5)
(BOLT, #4-40x11.8, Ni*2)
BEZEL
SUB-ASSM(G/S
)
LOGO PLATE
“VIEWSONIC”*1
SUPPORT VESA *1
BACK COVER *1
HSD or QDI PANEL*1
BRACKET_L*1
(SCREW,PW,CROSS,M3*5, Ni*4)
BACK COVER
SUB-ASS’Y
LOGO PLATE(ELLIPSE)*1
BRACKET_R*1
GROUND WIRE*1
KEYPAD CABEL*1
KEYPAD ASSM*1
(SCREW,PW,CROSS,M3*5, Ni*4)
(Ace tape*1)
BACK COVER SUB-ASS’Y*1
.
PLATE BASE *1
BASE COVER *1
RUBBER FOOT LE1708 *4
BASE COVER
SUB-ASS’Y
BASE SUB-ASSM *1
OPENING STAND LABEL*1
(SCREW,P,CROSS,M5*16, Ni*4)
HINGE,RIGHT*1
HINGE,LEFT*1
(SCREW,F,CROSS,T4*10, Ni*4)
HINGE COVER*2
S/N LABEL*1
QC LABEL*1
HI POT LABEL*1
BEZEL SUB-ASSM *1
ID LABEL*1
(SCREW,P,CROSS,T4*12, BLK*4)
V19 LCD MONITOR
FINAL ASM
NOTE: The arrow is the direction of assembly.
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5. TEST AND ADJUSTMENT
1. Key Function Description
CONTROL KEY
KEYS FUNCTION
[AUTO] [2]
By pressing [AUTO] key, “Auto Image Adjust” is performed
[MENU] [1]
By pressing [MENU] key, Main menu display
[▼] [▲]
A. When “MENU OSD” display, press these keys to change the contents of an adjustment
item, or change an adjustment value
B. When “MENU OSD” is un-display, press these keys to change brightness and contrast
[POWER]
Power on or power off the monitor
2. Hot Key Operation
CONTROL KEY
[▼] + [▲]
[1] + [2]
[1] + [▼] + [▲]
KEYS FUNCTION
Recall Contrast or Brightness while in the Contrast or Brightness adjustment, or recall both
of Contrast and Brightness when the OSD is not open.
Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode.
White Balance (Not shown on user’s guide)
[1] + [▼]
Power Lock
[1] + [▲]
OSD Lock
Remark : All the short cuts function are only available while OSD off
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3.
OSD Control
3.1 OSD table
Layer 1
Auto Image Adjust
Contrast/Brightness
Color Adjust
Layer 2
Layer 3
Contrast (+ / -)
Brightness (+ / -)
Srgb
9300K
6500K
5400K
Red (+ / -)
Green (+ / -)
Blue (+ / -)
User Color
Information
H Position (+ / -)
V Position (+ / -)
+/+/+/English
French
German
Italian
Spanish
Finnish
Japanese
Simplified Chinese
Traditional Chinese
On/Off
H Position (+ / -)
V Position (+ / -)
H/V Position
Manual Image Adjust
H Size
Fine Tune
Sharpness
Language Select
Setup Menu
Resolution Notice
OSD Position
OSD Time Out
OSD Background
On/Off
Memory Recall
3.2 OSD lock Menu function
Item
OSD Lock Menu Function Check
Method
Activate OSD lock
[1] + [▲] 10S
Deactivate OSD lock:
[1] + [▲] 10S(again)
Phenomenon
Press any of buttons"1", "▼",
"▲", "2" will appear "OSD Locked"
3s
NOTICE:
When the OSD is locked will lock all functions.
Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate “OSD Locked”
OSD Lock should not lock Power Button and Power Lock function
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3.3 Power lock Menu function
Item
Activate Power Lock
Power Lock Menu Function Check
Method
[1] + [▼] 10S
Phenomenon
Can not turn off the LCD;
Press the power button will appear
"Power Button Locked" OSD 3s;
LCD would automatically turn back
"On" when power is restored after a
power failure
Deactivate Power Lock
[1] + [▼] 10S(again)
NOTICE:
Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate “Power
Button Locked”
Power should only be lockable in the “On State”
3.4 Resolution notice function
Item
Activate
Notice Menu
Resolution Notice Menu
Method
Resolution Notice OSD should show
on screen after changing to non-native
Resolution
mode for 30 sec,
And it should disappear after 10s
or by pushing button [1] or [2]
Deactivate
Resolution Notice Menu
Push button [2] under Resolution
Notice OSD, select Disable
Phenomenon
------
-------
3.5 Factory Mode Introduction
When input the signal, press “power key” to turn off the monitor. Press” [▼] +[▲] +[ ] “at the same time so as to
enter factory mode. After power on, press ‘’Menu[1]’’ key, you can see the Factory menu.
INL
V2 050526
Auto Color
Color Temperature
: Currently using panel model name
: Currently using firmware version information.
: Automatically calibrate chip ADC parameter by using chip internal DAC
: The R, G, B of 9300K and 6500K and 5400K and User Mode
Colors are all generated from scaling back end.
4. Burn-in pattern
If it is a new monitor, and in factory mode, if no VGA signal input, Burn-in pattern will self generate automatically. Burn
in patterns are: full Red, Green, Blue, White and Black. You can not escape from Burn-in pattern until plug in VGA Cable,
and then press the power key. Turn the monitor off and then turn it on.
5. Auto Color (Automatically calibrate chip ADC parameter by using chip internal DAC)
If it is a new-built set and it is first time to do the “auto color”, please confirm the following steps:
-Connect the VGA cable with the standard video pattern generator and display 16-gray pattern on the monitor.
- Press “Power” to power off the monitor.
- Press” [▼] +[▲] +[ ] “simultaneously to enter factory mode.
- Press ‘’Menu[1]’’, then press ‘’Auto[2]’’ to execute Auto color item.
- After the “Auto Color” process finished, please press “Power” to restart monitor.
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6. EDID (Rewrite EDID data to EEPROM)
If we need to rewrite the EEPROM data, please confirm the following steps.
1. Plug in VGA Cable; we can rewrite the EDID data to EEPROM by using “EDID Rewrite” program.
2. If the “EDID Rewrite” process finished, please pull out VGA cable and press ‘’2’’+’’▲’’ at the same time.
3. Pull out AC power cable or press power key to restart.
7. Upload firmware to MCU via VGA Cable
7.1 Connect ISP board between monitor and PC as below configure
Service
cable
D-SUB
15PIN
RS232
9PIN
Insert to
RS232 9pin
CON on PC
D-SUB
15PIN
ISP Board
LCD Monitor
D-Sub
PC
VGA
output
Normal
shipping
cable
+12V Adapter
7.2 Before plug in the power cord, make sure keep “▲“ key to be pressed, when power on you can enter ISP mode.
7.3 8051ispwriter.exe will detect automatically which MCU used in this monitor. Do it as the order shown on the screen,
choose the corresponding firmware version, and load to MCU.
7.4 After finish, please plug out power cable and re-start monitor again.
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8
After repair, to ensure the quality you should do the following test and adjustment
Item
Content
Equipment
Test OSD function
1.Signal is set as 1280x1024@60Hz
2. LCM button are from left to right, checking whether each single function
key and compound function key can be worked.
Chroma
Signal Generator
Contrast Check
1. Set input mode to 1280x1024@60Hz
2. Set Pattern to 32 gray shades
3. Set contrast to the max. The brightest 5~6 shades brightness cannot be
distinguished.
Chroma
Signal Generator
Color Temperature
1. Do “Auto color” at 1280 x 1024@60Hz, 32gray shades
2. Measure color temperature, check it complies with the following
temperature:
5400K x=0.335 +/- 0.02, y=0.350 +/- 0.02
6500K x=0.313 +/- 0.02, y=0.329 +/- 0.02
9300K x=0.283 +/- 0.02, y=0.298 +/- 0.02
Chroma Signal Generator
and color analyzer
Modes switching
check
1. Use Chroma Pattern Generator to make sequence.
VESA (640x480 800x600 1024x768 1280x1024), MAC 832x624 DOS
(640x350 720x400), the detail supported modes and power saving signal.
2. Confirm the above timing modes must be full screen and the picture
must be normal.
3. LED is Orange at power saving mode.
Chroma Signal Generator
Y measurement at
default setting
1. Set brightness to default value 100 and contrast to default value 70 at
6500K
2. At full white patter, Measure Y, which should be >=200cd/m²
Chroma Signal Generator
and Color Analyzer
Panel Flicker check
1. Mode: 1280x1024@60Hz
2. Set Brightness& contrast to default value
3. Do “Auto Image Adjust”
4. Shut down PC to check whether there’s glitter on the center of the
picture.
Equipment::
Chroma Signal Generator
& PC
Power saving
1.
2.
3.
4.
5.
Mode: 1280x1024@60Hz
Pattern: full white
Brightness: Max.
Contrast: Default
Check power consumption at each modes
State
Power Consumption
＜40Ｗ
Normal
＜1Ｗ
Stand By
＜1Ｗ
Power Key Off
LED color
Green
Orange
No
Chroma signal generator
and Power meter
AC input: 230V/50Hz
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6. TROUBLE SHOOTING
1.
z
z
z
z
z
z
z
z
Common Acknowledge
If you change the interface board, be sure that the U105, U106 and U103 these three components also changed to the new I/F
board because there was program inside. If not, please re-write EDID or upload firmware into MCU via VGA Cable.
If you adjust clock and phase, please do it at the condition of Windows shut down pattern.
If you confirm the R.G.B. color is normal or not, please do it under 16-grey scalar pattern.
This LCM is analog interface. So if the entire screen is an abnormal color that means the problem happen in the analog circuit
part, if only some scale appears abnormal color that stand the problem happen in the digital circuit part.
If you check the H/V position, please use the crosshatch pattern.
This LCM support more than 30 timing modes, if the input timing mode is out of specification, the picture may appears
abnormally.
If brightness uneven, repairs Inverter circuit or change a new panel.
If you find the vertical line or horizontal line lost on the screen, please change panel.
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2.
No Power & Power LED Off
No power
Check circuit
if short
Check primary
rectifier voltage
Check IC802,
C805, T801
Check F801, P801,
D801
Check pin3 of
IC802 voltage
about 1V
Check R801, R805,
R822, R823, R817
Check R803, R807,
R824, R825
Check pin2 of IC802
voltage about 2V
Check R812, R816,
C818
Check pin1 of IC802
voltage is 5.8V
END
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VA902/b
3.
DC output voltage is unstable
Output Voltage Unstable
Check Vbe of
Q801 below 0.3V
Check ZD801, ZD802,
ZD803, D803, D805
Check circuit if
short
Check Q801, Q802
Check reference
voltage
Check pinR
of IC801
Check R809, R814,
IC801, R818
Check R810, R811
Check feedback
circuit
Check Vpin3-4 of
IC801 about 6V
Check C815, D806,
R812
Check Vpin1-2 of
IC801 about
1V
Check R809,
R814
END
Confidential - Do Not Copy
ViewSonic Corporation
26
VA902/b
4.
Output power is unstable
Unstable power
Check sampling
Circuit
Check R810,
R811, R818
Change R810, R811,
R818
Check the C pin
voltage of IC803
if 3V
Check the R pin
voltage of IC803
about 2.5V
Change
IC803
Check R809, R808, R814,
D809
Check pin1 of
IC802 voltage
is 5.8V
Check D806, C815 if
short
Change
D806, C815
Check pin3 of
IC802 voltage
about 1V
Change R801, R805,
R822, R823, R817
END
Confidential - Do Not Copy
ViewSonic Corporation
27
VA902/b
5.
Backlight can’t be turned on
No raster?
Yes
LED Green?
Yes
Backlight cannot be
turned on.
Yes
No
Is there 14Vdc voltage
on pin13 of IC501?
Check power
supply
Yes
No
Is R526 Ok?
Is there high-level voltage
on pin8 of IC501?
Yes
Check I/F
board
No
Yes
R526 open
Connecting the
output connector
again
No
Check CN501,
CN502, CN503 and
CN504?
Yes
No
Is there pulse waveform on
pin1, pin3, pin15 and pin16 of
IC501 at the moment of restart?
Is Ok IC501?
Yes
U501, U502 fail
No
IC501 fail
Yes
No
T501, T502 fail
Is ok T501, T502?
Yes
Check protected circuit Q501,
Q502, Q503, Q504
END
Confidential - Do Not Copy
ViewSonic Corporation
28
VA902/b
6.
Black Screen and backlight turn on
Confidential - Do Not Copy
ViewSonic Corporation
29
VA902/b
7.
White Screen
White Screen
OK
LVDS Cable Reinsert
Workmanship
NG
OK
Change LVDS Cable
LVDS Cable NG
NG
Check VLCD is 5V
OK
Check LVDS signals
NG
Check
Q101,Q102,Q107,R103
Panel Fail
NG
Check the HWRESET of
U104 exists
Check Panel-Enable of
U105(pin2) is low
OK
OK
NG
NG
Check RP101
OK
Check the pins of
U105
END
Confidential - Do Not Copy
ViewSonic Corporation
30
VA902/b
8.
Bad Screen
Bad Screen
OK
LVDS Cable Reinsert
Workmanship
NG
OK
Change LVDS Cable
LVDS Cable NG
NG
NG
Check Crystal:pin20,21 of
U105 and pin 33,34 of U104
1.Check
X101,C154,C155
2.Check
X102,C126,C168
OK
NG
Check the communication of
U104 and U105
Check ALE/RDZ/
WRZ/AD0/AD1/AD2/
AD3/HWRESET
OK
Check the pins of
U104 and U105
Confidential - Do Not Copy
ViewSonic Corporation
31
VA902/b
7. RECOMMENDED PART LIST
RECOMMENDED SPARE PARTS LIST (VA902-1)
ViewSonic Model Number: VS10780-1W
Rev: 1a
Serial No. Prefix: PSS
Item
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
27
28
Accessories:
Board Assembly:
Cabinets:
Cables:
Hardware:
Packing Material:
Description
Power Cord (Australia)
Power Cord (British)
Power Cord (CCC)
Power Cord (CNS)
Power Cord (EUROPE)
Power Cord (PSE)
Power Cord 10A/125V BLK 6FT UL/CSA
IF Board
Power & Inverter Board
Control Board
Cover, Hinge, VA902
Base Assembly
Bezel Assembly
Back Cover Assembly
HRN ASS'Y 1P 157mm
HRN LVDS FFC 30P 185mm
D-Sub cable
Hinge, Left.
Hinge, Right.
Bolt,#4-40X11.8, NiFPR D-sub Conn.
Screw, P, Cross, T.T-4*12, BLK
Screw, F, Cross, T.T-4*10 Ni
Screw, P, Cross, W/WAS, T.T-5*16,Black
Screw, P, Cross, T.T-4*5 Ni
Screw, PW, Cross, W/WAS,M3*5,Ni
Carton, VA902,
Cusion, EPS-L
Cusion, EPS-R
ECR/ECN
ViewSonic P/N
A-00003671
A-00003675
A-00003676
A-00003672
A-00003674
A-00003673
A-00003040
B-00003654
B-00003655
B-00003656
C-00003657
C-00003658
C-00003659
C-00003660
CB-00003661
CB-00003662
CB-00003047
HW-00003663
HW-00003664
HW-00003171
HW-00003665
HW-00003167
HW-00003666
HW-00003667
HW-00003169
P-00003668
P-00003669
P-00003670
Ref. P/N
453070800420R
453070800230R
453070800170
453070800480
453070800210R
453070800380R
453070800250
790411301400
790411401400
790411501000
501020203400
714020002500
714030002500
714050002500
430300100200
430303000180
453010100100
502060000100
502060000110
509000000700
509112612501
509212610300
509142716500
509112605300
509146305300
506020007100
506040005800
506040005810
Location
Universal number#
Confidential Do Not Copy
ViewSonic Corporation
32
Q'ty
50
50
50
50
50
50
50
50
50
50
50
50
50
50
100
100
50
50
50
100
100
100
100
100
100
50
50
50
VA902/b
RECOMMENDED SPARE PARTS LIST (VA902b-1)
ViewSonic Model Number: VS10780-1W
Rev: 1a
Serial No. Prefix: PSW
Item
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
27
28
Accessories:
Board Assembly:
Cabinets:
Cables:
Hardware:
Packing Material:
Description
Power Cord (Australia)
Power Cord (British)
Power Cord (CCC)
Power Cord (CNS)
Power Cord (EUROPE)
Power Cord (PSE)
Power Cord 10A/125V BLK 6FT UL/CSA
IF Board
Power & Inverter Board
Control Board
Cover, Hinge, VA902
Base Assembly
Bezel Assembly
Back Cover Assembly
HRN ASS'Y 1P 157mm
HRN LVDS FFC 30P 185mm
D-Sub cable
Hinge, Left.
Hinge, Right.
Bolt,#4-40X11.8, NiFPR D-sub Conn.
Screw, P, Cross, T.T-4*12, BLK
Screw, F, Cross, T.T-4*10 Ni
Screw, P, Cross, W/WAS, T.T-5*16,Black
Screw, P, Cross, T.T-4*5 Ni
Screw, PW, Cross, W/WAS,M3*5,Ni
Carton, VA902,
Cusion, EPS-L
Cusion, EPS-R
ECR/ECN
ViewSonic P/N
A-00003671
A-00003675
A-00003676
A-00003672
A-00003674
A-00003673
A-00003040
B-00003654
B-00003655
B-00003656
C-00003657
C-00003658
C-00003677
C-00003660
CB-00003661
CB-00003662
CB-00003047
HW-00003663
HW-00003664
HW-00003171
HW-00003665
HW-00003167
HW-00003666
HW-00003667
HW-00003169
P-00003678
P-00003669
P-00003670
Ref.P/N
453070800420R
453070800230R
453070800170
453070800480
453070800210R
453070800380R
453070800250
790411301400
790411401400
790411501000
501020203400
714020002500
714030002510
714050002500
430300100200
430303000180
453010100100
502060000100
502060000110
509000000700
509112612501
509212610300
509142716500
509112605300
509146305300
506020007110
506040005800
506040005810
Location Universal number#
Confidential Do Not Copy
ViewSonic Corporation
33
Q'ty
50
50
50
50
50
50
50
50
50
50
50
50
50
50
100
100
50
50
50
100
100
100
100
100
100
50
50
50
VA902/b
BOM LIST (VA902-1 for "Hannstar (8ms) Panel")
ViewSonic Model Number: VS10780-1W
Rev: 1a
Serial No. Prefix: PSS
Item
1
2
3
4
5
6
7
8
9
ViewSonic P/N
#N/A
#N/A
#N/A
#N/A
#N/A
#N/A
P-00003670
P-00003669
P-00003668
Ref. P/N
506250005001
506440002300
506390000500
506390000600
506390000400
506440002400
506040005810
506040005800
506020007100
10
P-00003943
506120300400
11
12
13
14
15
16
#N/A
#N/A
#N/A
#N/A
#N/A
#N/A
506380001800
506431000300
506440002600
506039000900
506039001200
506150001900
17
#N/A
506037001610
18
#N/A
453070800170R
19
A-00003674
453070800210R
20
A-00003675
453070800230R
21
#N/A
453070800480R
22
23
24
25
26
27
CB-00003047
#N/A
#N/A
C-00003657
HW-00003664
HW-00003663
453010100100
703000000703
714072840100
501020203400
502060000110
502060000100
28
#N/A
505040202100
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
HW-00003665
HW-00003167
HW-00003666
#N/A
C-00003659
#N/A
#N/A
#N/A
C-00003660
#N/A
#N/A
C-00003658
#N/A
#N/A
HW-00003667
PL-00003053
#N/A
509112612501
509212610300
509142716500
430300800370
714030002500
501010202900
501030202200
501120101500
714050002500
501020203500
502080300300
714020002500
501240201200
502170100500
509112605300
503020002600
714072841100
46
47
48
49
50
51
52
53
E-00003942
B-00003172
#N/A
#N/A
B-00003654
B-00003655
HW-00003169
HW-00003171
631102090110
502090301300
502020101700
502020101710
790411301400
790411401400
509146305300
509000000700
54
55
56
57
58
CB-00003662
B-00003656
CB-00003661
#N/A
#N/A
430303000180
790411501000
430300100200
511100001500
506381000700
59
M-00003165
505040202000
Description
LBL,AGENCY(VA902), LE1909.CCC MARK
LABEL,BLANK,76.2x76.2mm,LE1709(UPC)
LABEL,QC-PASS,OD=15mm, LE1709
LABEL,HI-POT PASS, LE1709
LABEL,OPENING STAND, LE1709
LABEL,BLANK,50x25mm,LE1709(S/N)
CUSHION,EPS-R, LE1909
CUSHION,EPS-L, LE1909
CARTON,VIEWSONIC(VA902),LE1909
BAG,PE+EPE,L590xW480xT0.6mm
(PRINTED)LE1909
TAPE,WRAPPING TYPE,48mmx50M
LE1X04/05
FILM,PE 500mmx900M
LABEL,BLANK,210x65mm,LE1709(PALLET)
CORNER PAPER,1900x50x50mm,LE1701
CORNER PAPER,820x50x50mm
PALLET,1100x1100x120mm,LE1705
CARDBOARD,COVER,1100x1100x120xT5mm,
LE1909
PWRCORD 10A/250V BLK 6FT CHINA.RVV
3Gx0.
PWR CORD 6A/250V BLK 6FT VDE H05VV-F
3Gx
PWRCORD 6A/250V BLK 6FT
UK3Gx.75mm(SP60/
PWRCORD 7A/125V BLK 6FT CNS,VCTF
3Gx0.75
CABLE,D-SUB 15P MALE 6FT
BLACK/BLUE,SZ40
KIT,ACCESSORY,VA902-HSD,LE1909
ASSY,FIANL(S), LE1909-4A0
COVER,HINGE, LE1909
HINGE,RIGHT, LE1909
HINGE,LIFT, LE1909
INSULATOR,MYLAR,L35xW16mm,HINGE
LEFT, LE1909
SCREW,P,CROSS,T.T-4*12,BLK(HEAD ?
7.8mm)
SCREW,F,CROSS,T.T-4*10,Ni
SCREW,P,CROSS W/WAS,T.T-5*16,BLACK
HRN ASS'Y 4x2P 220mm UL2651#28
ASSY,BEZEL(SILVER),LE1909
BEZEL,FRONT(SILVER), LE1909
BUTTON,FUNCTION KEY, LE1909
LENS, LE1909
ASSY,BACK COVER, LE1909
COVER,BACK, LE1909
SUPPORT,VESA, LE1709
ASSY,BASE, LE1909
BASE, LE1909
PLATE,BASE, LE1909
SCREW,P,CROSS,T.T-4*5,Ni
RUBBER,FOOT,OD14.1xT2.5mm,3M, LE1708
ASSY,PANEL(S), LE1909-4A0
LCD PANEL 19" HSD190ME13A02(HANNSTAR)
CHASSIS, LE1709
BRACKET,LEFT, LE1909
BRACKET,RIGHT, LE1909
PCBA,IF BOARD, LE1909-4A0
PCBA,PWR&INV./B, LE1909-4A0
SCREW,PW,CROSS W/WAS,M3*5,Ni
BOLT,#4-40x11.8,NiFOR D-SUB/DVI CONN.
HRN LVDS FFC 30P
185mm,ACCX30185KU28MY
PCBA,KEYPAD BOARD, LE1909
HRN ASS'Y 1P 157mm GREEN,UL1007 #20
CLIP,WIRE.CH-01P(PG), LE1709
TAPE,ACE,45mmx30M(PC=10x45mm),LE1709
INSULATOR,MYLAR,L79.7xW62.7mm,CHASS
IS, LE1709
Location
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
Qty.
1 PC
1 PC
1 PC
1 PC
1 PC
1 PC
1 PC
1 PC
1 PC
For VSCN &VSI & VSE &VSE-UK
1 PC
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
0.024
0.0025
0.0357
0.0714
0.0714
0.0178
For VSCN &VSI & VSE &VSE-UK
0.0357 PC
Only for VSCN
1 PC
Only for VSE & VSE-UK
1 PC
Only for VSE-UK
1 PC
Only for VSI
1 PC
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
1
1
1
2
1
1
For VSCN &VSI & VSE &VSE-UK
1 PC
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
4
4
4
1
1
1
1
1
1
1
1
1
1
1
2
5
1
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
1
1
1
1
1
1
13
2
PC
PC
PC
PC
PC
PC
PC
PC
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
1
1
1
1
0.001
For VSCN &VSI & VSE &VSE-UK
Confidential Do Not Copy
ViewSonic Corporation
34
ROL
ROL
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
ROL
1 PC
VA902/b
Item
ViewSonic P/N
Ref. P/N
60
61
#N/A
#N/A
506102000400
506102000300
62
63
#N/A
#N/A
506102000500
506390210100
64
65
66
67
68
#N/A
#N/A
#N/A
#N/A
#N/A
506380002100
506431002050
506091000500
506092001400
506030200200
69
70
#N/A
#N/A
506120004600
506500003100
Description
LOGO PLATE,VIEWSONIC, LE1709(THREE
BIRDS)
LOGO PLATE,VIEWSONIC, LE1709
Location
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
1 PC
1 PC
LOGO PLATE,VIEWSONIC, LE1709(ELLIPSE)
LABEL,CARTON(8ms),LE1709,L89xW58mm
TAPE,WRAPPING
TYPE(VIEWSONIC),50mmx75M,LE1709
FILM,PROTECTION,UNPRINTED,LE1909/18
LABEL,WARRANTY, LE1709
CARD,WARRANTY, LE1709
CARD,AFTER SERVICE, LE1709.L130xW80
BAG,PLASTIC,L700xW505xH160xT0.05mm,LE
1909
LABEL,"U" MARK(20x20mm),LE1709
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
1 PC
1 PC
For VSCN &VSI & VSE &VSE-UK
For VSCN &VSI & VSE &VSE-UK
Only for VSCN
Only for VSCN
Only for VSCN
Only for VSCN
Only for VSE-UK
Confidential Do Not Copy
ViewSonic Corporation
35
Qty.
0.0083
0.1
1
1
1
ROL
PC
PC
PC
PC
1 PC
1 PC
VA902/b
BOM LIST (VA902b-1 for "Hannstar (8ms) Panel")
ViewSonic Model Number: VS10780-1W
Rev: 1a
Serial No. Prefix: PSW
Item
1
2
3
4
5
6
7
8
9
ViewSonic P/N
#N/A
#N/A
#N/A
#N/A
#N/A
#N/A
P-00003670
P-00003669
P-00003668
Ref. P/N
506250005001
506440002300
506390000500
506390000600
506390000400
506440002400
506040005810
506040005800
506020007100
10
P-00003943
506120300400
11
12
13
14
15
16
#N/A
#N/A
#N/A
#N/A
#N/A
#N/A
506380001800
506431000300
506440002600
506039000900
506039001200
506150001900
17
#N/A
506037001610
18
A-00003040
453070800250
19
20
21
22
23
24
CB-00003047
#N/A
#N/A
C-00003657
HW-00003664
HW-00003663
453010100100
703000000713
714072840101
501020203400
502060000110
502060000100
25
#N/A
505040202100
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
HW-00003665
HW-00003167
HW-00003666
#N/A
C-00003677
#N/A
#N/A
#N/A
C-00003660
#N/A
#N/A
C-00003658
#N/A
#N/A
HW-00003667
PL-00003053
#N/A
509112612501
509212610300
509142716500
430300800370
714030002510
501010202910
501030202200
501120101500
714050002500
501020203500
502080300300
714020002500
501240201200
502170100500
509112605300
503020002600
714072841100
43
44
45
46
47
48
49
50
E-00003942
B-00003172
#N/A
#N/A
B-00003654
B-00003655
HW-00003169
HW-00003171
631102090110
502090301300
502020101700
502020101710
790411301400
790411401400
509146305300
509000000700
51
52
53
54
55
CB-00003662
B-00003656
CB-00003661
#N/A
#N/A
430303000180
790411501000
430300100200
511100001500
506381000700
56
M-00003165
505040202000
57
58
#N/A
#N/A
506102000400
506102000300
Description
LBL,AGENCY(VA902), LE1909.CCC MARK
LABEL,BLANK,76.2x76.2mm,LE1709(UPC)
LABEL,QC-PASS,OD=15mm, LE1709
LABEL,HI-POT PASS, LE1709
LABEL,OPENING STAND, LE1709
LABEL,BLANK,50x25mm,LE1709(S/N)
CUSHION,EPS-R, LE1909
CUSHION,EPS-L, LE1909
CARTON,VIEWSONIC(VA902),LE1909
BAG,PE+EPE,L590xW480xT0.6mm
(PRINTED)LE1909
TAPE,WRAPPING TYPE,48mmx50M
LE1X04/05
FILM,PE 500mmx900M
LABEL,BLANK,210x65mm,LE1709(PALLET)
CORNER PAPER,1900x50x50mm,LE1701
CORNER PAPER,820x50x50mm
PALLET,1100x1100x120mm,LE1705
CARDBOARD,COVER,1100x1100x120xT5mm,
LE1909
PWR CORD 10A/125V BLK 6FT UL/CSA,SVT
18x
CABLE,D-SUB 15P MALE 6FT
BLACK/BLUE,SZ40
KIT,ACCESSORY,VA902B-HSD,LE1909
ASSY,FIANL(G), LE1909-4A0
COVER,HINGE, LE1909
HINGE,RIGHT, LE1909
HINGE,LIFT, LE1909
INSULATOR,MYLAR,L35xW16mm,HINGE
LEFT, LE909
SCREW,P,CROSS,T.T-4*12,BLK(HEAD ?
7.8mm)
SCREW,F,CROSS,T.T-4*10,Ni
SCREW,P,CROSS W/WAS,T.T-5*16,BLACK
HRN ASS'Y 4x2P 220mm UL2651#28
ASSY,BEZEL(GRAY),LE1909
BEZEL,FRONT(GRAY), LE1909
BUTTON,FUNCTION KEY, LE1909
LENS, LE1909
ASSY,BACK COVER, LE1909
COVER,BACK, LE1909
SUPPORT,VESA, LE1709
ASSY,BASE, LE1909
BASE, LE1909
PLATE,BASE, LE1909
SCREW,P,CROSS,T.T-4*5,Ni
RUBBER,FOOT,OD14.1xT2.5mm,3M, LE1708
ASSY,PANEL(S), LE1909-4A0
LCD PANEL 19" HSD190ME13A02(HANNSTAR)
CHASSIS, LE1709
BRACKET,LEFT, LE1909
BRACKET,RIGHT, LE1909
PCBA,IF BOARD, LE1909-4A0
PCBA,PWR&INV./B, LE1909-4A0
SCREW,PW,CROSS W/WAS,M3*5,Ni
BOLT,#4-40x11.8,NiFOR D-SUB/DVI CONN.
HRN LVDS FFC 30P
185mm,ACCX30185KU28MY
PCBA,KEYPAD BOARD, LE1909
HRN ASS'Y 1P 157mm GREEN,UL1007 #20
CLIP,WIRE.CH-01P(PG), LE1709
TAPE,ACE,45mmx30M(PC=10x45mm),LE1709
INSULATOR,MYLAR,L79.7xW62.7mm,CHASS
IS, LE1709
LOGO PLATE,VIEWSONIC, LE1709(THREE
BIRDS
LOGO PLATE,VIEWSONIC, LE1709
59
60
#N/A
#N/A
506102000500
506390210100
Location
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
Qty.
1 PC
1 PC
1 PC
1 PC
1 PC
1 PC
1 PC
1 PC
1 PC
For VSA
1 PC
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
0.024
0.0025
0.0357
0.0714
0.0714
0.0178
ROL
ROL
PC
PC
PC
PC
For VSA
0.0357 PC
For VSA
1 PC
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
1
1
1
2
1
1
For VSA
1 PC
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
4
4
4
1
1
1
1
1
1
1
1
1
1
1
2
5
1
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
For VSA
1
1
1
1
1
1
13
2
PC
PC
PC
PC
PC
PC
PC
PC
For VSA
For VSA
For VSA
For VSA
For VSA
1
1
1
1
0.001
PC
PC
PC
PC
PC
PC
PC
PC
PC
PC
ROL
For VSA
1 PC
For VSA
For VSA
1 PC
1 PC
LOGO PLATE,VIEWSONIC, LE1709(ELLIPSE) For VSA
LABEL,CARTON(8ms),LE1709,L89xW58mm
For VSA
1 PC
1 PC
Confidential Do Not Copy
ViewSonic Corporation
36
VA902/b
Item
ViewSonic P/N
Ref. P/N
61
62
#N/A
#N/A
506380002100
506431002050
Description
TAPE,WRAPPING
TYPE(VIEWSONIC),50mmx75M,LE1709
FILM,PROTECTION,UNPRINTED,LE1909/18
Location
Qty.
For VSA
For VSA
0.0083 ROL
0.1 PC
Confidential Do Not Copy
ViewSonic Corporation
37
VA902/b
8. SCHEMATIC DIAGRAM
Power Supply
C820
2200P Y 1
C805
C807
100u 450V 33n 400V/ NC
ZD802
P6KE200A
+14V
C808
1000u 25V
C811
1n 500V
1
C810
220u 25V
4
R828
100R 1W
ZD801
9.1V
2
R829
200R
3
R827
10K
C822
0.1u 50V
ZD803
5.6V
ZD804
16V
C815
47u/25V
R812
6R8
L
F
R816
6R8
C818
47u/25V
C817
0.1u 50V
3
R810
5K1 1%
1
R815
1K
2
R814
1K
1
5
X
3
C
R809
100R
R808
10K
IC801
LTV817
4
IC802
TOP246Y
R817
12K
C813
47p 1KV
1
6
2
6
D
S
4
C806
2200P Y 2
250V
C826
1000u 10V C814
47u 25V
C812
1000u 10V
7
B801
BEAD CORE 3.5x9
Q802
2SC1815
VCC5V
D805 SRF5-04
D806
A02
R825
470K
C804 0.47u X2
275V
L803
5uH 5A
2
3
5
1M
1
Q801
PMBT3904
R813
1K
R811
51K 1%
C816
0.1u 100V
MEB
C
1
1
3
R824
510K
R823
3M3
C801
2200P Y 2
250V
2
R806
10R
2
-
4
3
R820
3
8
D804
MUR1100
4
1M
10
L802
5uH 5A
9
R822
3M3
R821
1
2
2
1
11
D803 SRF8-10
R807
510K
R801
3M3
R805
3M3
L801
12mH
2
1
T801
TRF-EI28
R803
510K
C803
4n7/1KV
3
2
400V
C802
1n 500V
D809
1N4148W
2
+ 1
D801
BL4-06
R804
68R 1/2W
R802
10R
A
R
IC803
TL431
R819
10K
R818
3K3 1%
C819
47u/25V
RT801
5R
C824
4700P Y 1
PGND
F801
2A 250V
ViewSonic
2
1
N
L
CN801
08DA-6S
1
2
3
4
5
6
3
P801
AC IN
TO SCALER BD CN101
VCC5V
BRIGHTNESS
ON/OFF
Document Number :
Confidential - Do Not Copy
APPRO BY :
A4
TITLE :
CHECK BY :
POWER SUPPLY
C821
0.1u/50V
SHEET
38
SIZE :
0921341041
2005-06-02
DATE :
ViewSonic Corporation
LE1909(VA902/b)VA902/b
InnoLux
VA902/b
2
OF
3
DRAW N BY :
Rev :
V03
Inverter
+14V
H
C522
220uF/25V
C511
2.2uF/25V
R501
3M/3kv
+
T501
EEL-19 22:2600
C537
NC
D513 SKS20-04AT
2
1
J507
33R 1/4W
R528
124K 1%
R522
88.7K 1%
NDRV2
4
5
C529
220P G/ 50V
R523
62K 1%
6
7
BRIGHTNESS
8
C504
1n/50V
R524
360K 1%
15
PDRV1
NDRV1
HSB
GNDA
VIN
CT
V5000
LCT
ISEN
DIM
CMP_SST
ENA
VSEN
1
2
3
4
16
PDRV2
PGND
3
J501
33R 1/4W
14
C528
1.0u/25V
13
12
10
C503
100n/50V
9
1
2
3
4
C502
2.2u/25v
R509
1.5K
1.5K
1.5K
1.5K
R511
Q504
Q505
1.4K
2
2N7002
3
2
2N7002
3
2
1
1
0.1u/50V
0.1u/50V
R521
1M
R519
1M
8
7
6
5
H
7
6
C527
5P/3KV
U502
AOP605
S1
G1
S2
G2
D1
D1
D2
D2
8
7
6
5
3
R511
1.5K 1%
8
2
H
3
3
R503
3M/3KV
5
3
7
6
IS3
D503
1 BAV99
R532
R533
R534
10K
10K
10K
C525
5P/3KV
3
C523
6.8n/50V
5V
L
OVP2
2
D505
1 BAV99
C536
220pF/50V
OP1
2
1
D502
BAV99
R514 0R
IS1
R509 1.5K 1%
LE1909 (VA902/b)
Document Number :
SIZE :
0921341041
D509
1N4148W
OP1
OP2
OP3
OP4
D510
1N4148W
A4
CHECK BY :
Confidential - Do Not Copy
VA902/b
2005-07-15
DATE :
3
OF
VA902/b
APPRO BY :
TITLE :
SHEET
39
D504
1 BAV99
2
3
Inverter
ViewSonic Corporation
OP2
CN501
ViewSonic
InnoLux
R515
1M
R517
1M
D511
1N4148W
CN503
R510
1k
R504
3.6K
C526
10P/3KV
L
2
0.1u/50V
0.1u/50V
10K
D512
1N4148W
R513
0R
IS3
100K
R508
R531
NOTE:
紅色粗線:表示高電壓迴路;
紅色虛線:表示易發熱元件;
橘色粗線:表示大電流迴路;
1
2
H
2N7002
3
2
D501
BAV99
OP3
C535
220pF
L
3
OVP1
2
D507
1 BAV99
T502
EEL-19 22:2600
1
Q501
2N7002
C533
C532
C534
C531
CN502
Q502
Q503
2N7002
3
D1
D1
D2
D2
C538
NC
IS1
R507
3.9K 1%
3
C508
22n/25V
QDI
1.4K
+
R506
3.9K 1%
2
HSD/INL
R512
1k
1
AUO
R505
1M
1
ITEM
C509
220uF/25V
OVP2
C507
2200p/50V
S1
G1
S2
G2
2
1
D514
SKS20-04AT
OVP1
R527
3.3M 1%
C506
4700P/50V
U501
C530
6.8n/50V
11
5V
C505
0.01u/25V
3
+5V
R526 47K 1%
R529
1M
OP4
R502
3.6K
AOP605
OZ9910G
ON/OFF
D506
1 BAV99
2
5
IC501
2
D508
1 BAV99
C524
10P/3KV
8
2
L
CN504
2
3
5V
1
3
3
DRAWN BY :
Rev :
V03
DC Input
U102
FS8860-33PJ
VCC5V
VCC3.3
2
C102
0.1/50V
VCC3.3
VAA1
ADJ
VOUT
+
C103
100uF/16V
1
+
VIN
C104
0.1/50V
VAA1
VAA2
VAA2
VAA3
VAA3
VAA4
CN101
4500-06
U101
FS8860-18PJ
VOUT
VIN
2
+ C101
100uF/16V
C111
0.1/50V
VCC1.8
+
C107
0.1/50V
C106
100uF/16V
1
+
BRIGHTNESS
ON/OFF
VCC1.8
ADJ
3
VCC5V
1
2
3
4
5
6
VAA4
R174
9.1R/2W
C105
100uF/16V/NC
From Power &
Inverter
C169
100uF/16V
3
R175
NC/0
BRIGHTNESS
VCC5V
R177
10K
R176 4K7
R104
4K7
C113
1u/16V
DIMMER1
Q108
PMBT3904
VCC5V
Q101
S
R101
10K
C108
0.1/50V
R103
4K7
R169
22K
VLCD
R105
4K7
ON/OFF
R106
10K
VCC5V
G
R170
0
Q102
PMBT3906
PANEL_ENABLE
VLCD
AP2301N
D
+
C109
100uF/16V
C110
0.1/50V
Q107
PMBT3904
CCFL_ENABLE
C114
0.1/50V
R157
Q103
PMBT3904 4K7
ViewSonic
InnoLux
LE1909 (VA902/b)VA902/b
Document Number :
SIZE :
0921341040
APPRO BY :
A4
TITLE :
CHECK BY :
DC INPUT
2005-06-07
DATE :
SHEET
Confidential - Do Not Copy
ViewSonic Corporation
40
VA902/b
2
OF
6
DRAWN BY :
Rev :
V01
VGA Input
16
PC5V_VGA
11
1
6
2
7
3
8
4
9
5
10
12
13
14
R166
0
VGA_G
R167
0
VGA_B
R168
0
R111
75 1%
R112
75 1%
R113
75 1%
R115
R121
R116
R122
R117
R123
R118/NC
22
47
22
47
22
47
470
C115
C121
C116
C122
C117
C123
NC/C118
47n/25V
47n/25V
47n/25V
47n/25V
47n/25V
47n/25V
1000P/50V
R114
10K
R107
100
RIN
GNDR
GIN
GNDG
BIN
GNDB
SOG
VCC5V
TVS101
BAV99
17
15
VGA_R
CN102
DZ11AA1-HW6
TVS102
BAV99
C165
NC
C166
NC
C167
NC
TVS103
BAV99
HPD_VGA
VCC5V
DET_VGA
DDC_SCL_VGA
DDC_SDA_VGA
DDC_SCL_VGA
DDC_SDA_VGA
VSI
R110
100
R108
1K
HSI
R165
0
R109
1K
TVS104
5V6
DDC_SDA_VGA
R127
R126
R125
R124
DDC_SCL_VGA
PC5V_VGA
VCC5V
TVS105
5V6
TVS106
5V6
TVS107
5V6
R119
2K2
C119
33p/50V
R120
2K2
VSYNC
HSYNC
C120
220p/50V
100
100
10K
10K
D103
SN4148
D104
SN4148
C124
0.1/50V
ViewSonic
InnoLux
U103
AT24C02N-10SI
1
2
3
4
A0
A1
A2
GND
VCC
WP
SCL
SDA
VA902/b
LE1909 (VA902/b)
Document Number :
8
7
6
5
SIZE :
0921341040
APPRO BY :
A4
TITLE :
CHECK BY :
VGA_INPUT
2005-06-07
DATE :
SHEET
Confidential - Do Not Copy
ViewSonic Corporation
41
VA902/b
3
OF
6
DRAWN BY :
Rev :
V01
Scaler
VAD
VPLL VDVI VDPLL
VPO
VCC3.3
VDD
VPO
66
C125
1u/16V
67
73
74
DIMMER1
18
87
97
117
VDDC
VDDC
VDDC
VDDC
11
21
84
94
104
114
126
53
AVDD_PLL
35
45
51
AVDD_DVI
AVDD_DVI
VDDP
VDDP
VDDP
VDDP
VDDP
VDDP
VDDP
NC/LVB3P
NC/LVB3M
NC/LVBCKP
NC/LVBCKM
NC/LVB2P
NC/LVB2M
NC/LVB1P
NC/LVB1M
NC/LVB0P
NC/LVB0M
U104
TSU16AK
AD0/GPO6
AD1
AD2
AD3/GPO5
REFP
REFM
CSZ
SCL
SDA
HWRESETZ
INT
PWM0
PWM1
BYPASS
19
GNDC
86
GNDC
96
116 GNDC
GNDC
GNDP
GNDP
GNDP
GNDP
GNDP
GNDP
GNDP
XOUT
68
56
64
36
54
C168
22p/50V
BUS TYPE/NC
10
20
85
95
105
115
127
34
XIN
AVSS_DVI
AVSS_DVI
AVSS_DVI
33
39
42
48
X102
14.318MHz
AVSS_LPLL
AVSS
AVSS
AVSS
AVSS_MPLL
AVSS_PLL
C126
22p/50V
102
103
106
107
108
109
110
111
112
113
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA9
118
119
120
121
122
123
124
125
128
1
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PB8
PB9
PA[0..9]
C129
C130
C131
C132
C133
C170
C171
0.1/50V 0.1/50V 0.1/50V 0.1/50V 0.1/50V 0.1/50V 0.1/50V
VCC1.8
PA[0..9]
VDD
VCC1.8
FB103
BEAD60OHM
C134
10u/16V
VAA1
PB[0..9]
C135
C136
C137
C172
0.1/50V 0.1/50V 0.1/50V 0.1/50V
VAD
VAA1
PB[0..9]
FB104
BEAD60OHM
C138
10u/16V
VAA2
C139
C173
0.1/50V 0.1/50V
VPLL
VAA2
30
77
78
31
AD0
AD1
AD2
AD3
69
71
70
32
72
R164
R163
R162
3
FB105
BEAD60OHM
C140
10u/16V
CSZ/ALE
SCL/RDZ
SDA/WRZ
HWRESET
INT
1K
1K
1K
VAA3
VDVI
FB106
BEAD60OHM
2
C142
10u/16V
VCC3.3
6
R129
C141
0.1/50V
VAA3
C127 0.1/50V
C143
C174
0.1/50V 0.1/50V
4K7
VAA4
C162 100p/50V
390 1%
R+
RG+
GB+
BCK+
CKREXT
LVA3P
LVA3M
LVACKP
LVACKM
LVA2P
LVA2M
LVA1P
LVA1M
LVA0P
LVA0M
C128
10u/16V
C163 100p/50V
R128
RIN0
RIN0M
GIN0
GIN0M
SOGIN0
BIN0
BIN0M
HSYNC0
VSYNC0
DDC1_CLK/GPO8
DDC1_DAT/GPO7
FB102
BEAD60OHM
C164 100p/50V
VDVI
40
41
43
44
46
47
49
50
52
AVDD_MPLL
63
62
60
59
61
58
57
37
38
29
28
RIN
GNDR
GIN
GNDG
SOG
BIN
GNDB
HSYNC
VSYNC
AVDD
AVDD
55
65
VCC3.3
VDPLL
VAA4
FB107
BEAD60OHM
C144
10u/16V
ViewSonic
C145
0.1/50V
VA902/b
LE1909 (VA902/b)
InnoLux
Document Number :
SIZE :
0921341040
Note: U104 pin4,5,7~9,12~17,22~27,75,76,79~83,88~93,98~101 are all NC (open)
APPRO BY :
A4
TITLE :
CHECK BY :
SCALER
2005-06-07
DATE :
SHEET
Confidential - Do Not Copy
ViewSonic Corporation
42
VA902/b
4
OF
6
DRAWN BY :
Rev :
V01
Panel Interface
CN103
AL2309-A0G1Z
PB[0..9]
PA[0..9]
PB9
PB8
PB7
PB6
PB5
PB4
RXO0RXO0+
RXO1RXO1+
RXO2RXO2+
PB3
PB2
PB1
PB0
PA9
PA8
RXOCRXOC+
RXO3RXO3+
RXE0RXE0+
PA7
PA6
RXE1RXE1+
PA5
PA4
PA3
PA2
PA1
PA0
RXE2RXE2+
RXECRXEC+
RXE3RXE3+
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
27
28
29
30
VLCD
VLCD
CN104
DUPON2.0mm/NC
RXO0RXO1RXO2RXOCRXO3RXE0RXE1RXE2RXECRXE3-
24
22
20
18
16
14
12
10
8
6
4
2
VLCD
23
21
19
17
15
13
11
9
7
5
3
1
RXO0+
RXO1+
RXO2+
RXOC+
RXO3+
RXE0+
RXE1+
RXE2+
RXEC+
RXE3+
ViewSonicInnoLux
LE1909 (VA902/b)VA902/b
Document Number :
SIZE :
0921341040
APPRO BY :
A4
TITLE :
CHECK BY :
PANEL INTERFACE
2005-06-07
DATE :
SHEET
Confidential - Do Not Copy
ViewSonic Corporation
43
VA902/b
5
OF
6
DRAWN BY :
Rev :
V01
MUC
RP101
10K
100
100
16
17
18
VCPU
1
2
3
4
8
9
23
33
34
RP104
10K
2
3
4
5
6
7
8
7
6
5
PANEL_ENABLE
CCFL_ENABLE
DET_VGA
VCPU
Q104
PMBT3906
LED_GREEN
R158
51
R143
4K7
R144
4K7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
C154
12p/50V
4
3
2
1
4
3
2
1
5
6
7
8
10K
5
6
7
8
5
6
7
8
4
3
2
1
R134
44
P3.3/INT1
P4.2
VCPU
R145
220
P3.7
20
R142
220
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P1.6/PWM3
P1.7/PWM4
P4.0
ALE
P4.1
X2
1
C153
NC/10u/16V
P4.3/INT2
P3.4/T0
P3.5/T1
P3.6/WR
P3.1/TXD
P3.0/RXD
VSS
43
42
41
40
39
38
37
36
12
HWRESET
CSZ/ALE
SCL/RDZ
SDA/WRZ
AD0
AD1
AD2
AD3
ISP for Standard
8051
24
25
26
27
28
29
19
15
R146
R147
R148
R149
R150
LED_GREEN
LED_ORANGE
KEY_POWER
KEY_SELECT/AUTO
KEY_UP
KEY_DOWN
KEY_MENU/EXIT
1K
1K
1K
1K
1K
6
8
4
1
3
5
2
7
CN106
2x4PIN
VCPU
R156
10K
TO KEY PAD
U106
24C16
C151
0.1/50V
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
1000P/50V
1000P/50V
1000P/50V
1000P/50V
1000P/50V
R140
R141
R139
10K
RP103
10K
C156
C157
C158
C159
C160
VCC
WP
SCL
SDA
R138
10K
X1
A0
A1
A2
GND
8
7
6
5
PSEN
RP102
10K
R155
10K
R153
R152
13
11
22
100
100
DDC_SDA_VGA
DDC_SCL_VGA
21
1
2
3
4
32
R137
10K
RST
P3.2/INT0
VDD
10K
31 R133
EA
INT
VCPU
D102
SN4148
10
14
P2.7
U105
Winbond W78E65P
C150
10u/16V
10K
VCPU
30 R132
C149
0.1/50V
C148
10u/16V
P2.6
FB108
BEAD60OHM
0
VCPU
35 R131
VCC5V
X101
22.1184MHz
C155
12p/50V
Q105
PMBT3906
LED_ORANGE
ViewSonic
InnoLux
R159
220
VA902/b
LE1909 (VA902/b)
Document Number :
0921341040
APPRO BY :
SIZE :
A4
TITLE :
CHECK BY :
MCU
2005-06-07
DATE :
SHEET
Confidential - Do Not Copy
ViewSonic Corporation
44
VA902/b
6
OF
6
DRAWN BY :
Rev :
V01
Key Pad
LED101
GREEN
LED_GREEN
LED_ORANGE
KEY_MENU/EXIT
KEY_SELECT/AUTO
KEY_POWER
KEY_DOWN
KEY_UP
ORANGE
SW101
SW102
SW103
SW104
6
8
2
1
4
5
3
7
SW105
CN106
2x4PIN
SW TACT
SW TACT
SW TACT
MENU/1
AUTO/2
POWER
SW TACT
DOWN
SW TACT
UP
ViewSonic
InnoLux
LE1909(VA902/b)
Document Number :
0921341039
SIZE :
A4
APPRO BY :
TITLE :
CHECK BY :
KEYPAD
2005-06-02
DATE :
SHEET
Confidential - Do Not Copy
ViewSonic Corporation
45
VA902/b
2
OF
VA902/b
2
DRAWN BY :
Rev :
V01
9. PCB Layout
Main board Top layout
Confidential - Do Not Copy
ViewSonic Corporation
46
VA902/b
POWER board
Confidential - Do Not Copy
ViewSonic Corporation
47
VA902/b
*Reader’s Response*
Dear Readers:
Thank you in advance for your feedback on our Service Manual, which allows continuous improvement
of our products. We would appreciate your completion of the Assessment Matrix below, for return to
ViewSonic Corporation.
Assessment
A. What do you think about the content of this Service Manual?
U nit
Ex cellent
Fair
G ood
Bad
1. Precautions and Safety Notices
2. Specification
3. Front Panel Function Control Description
4. Circuit Description
5. Adjustment Procedure
6. Troubleshooting Flow Chart
7. Recommended Spare Parts List
8. Exploded Diagram and Exploded Parts List
9. Block Diagram
10. Schematic Diagrams
11. PCB Layout Diagrams
B. Are you satisfied with this Service Manual?
It em
Ex cellent
G ood
Fair
Bad
1. Service Manual Content
2. Service Manual Layout
3. The form and listing
C. Do you have any other opinions or suggestions regarding this service manual?
Reader’s basic data:
Name:
Title:
Company:
Add.:
Fax:
Tel:
E-mail:
After completing this form, please return it to ViewSonic Quality Assurance in the USA at facsimile
1-909-839-7943. You may also e-mail any suggestions to the Director, Quality Systems & Processes
([email protected])
Confidential - Do Not Copy
ViewSonic Corporation
48
VA902/b