Page 1
3
VS10931
Display
Service Manual
ViewSonic VA912/b-
Model No.
19” Color TFT LCD
( VA912/b- 3_SM Rev. 1a Oct. 2005)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Page 2
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 ECR Number
Description of Changes Editor
1a 10/12/05 Initial Release G. Han
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
I
Page 3
1. Precautions and Safety Notices 1
2. Specification 5
3. Front Panel Function Control Description 10
4. Circuit Description 16
5. Adjustment Procedure 18
6. Troubleshooting Flow Chart 42
7. Recommended Spare Parts List 48
8. Exploded Diagram and Exploded Parts List 53
9. Block Diagram 55
10. Schematic Diagrams 56
11. PCB Layout Diagrams 69
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
II
Page 4
1
1. Precautions and Safety Notices
1. Appropriate Operation
(1) Turn off the product before cleaning.
(2) Use only a dry soft cloth when cleaning the LCD panel surface.
(3) Use a soft cloth soaked with mild detergent to clean the display housing.
(4) Use only a high quality, safety approved AC/DC power cord.
(5) Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
(6) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off.
(7) Do not touch the LCD panel surface with sharp or hard objects.
(8) Do not place heavy objects on the LCD display, video cable, or power cord.
(9) Do not use abrasive cleaners, waxes or solvents for your cleaning.
(10) 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.
(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist or
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 5
2
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.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 6
3
Correct methods : Incorrect Methods :
Only touch the metal-frame of the panel or the front cover
of the monitor.
Do not touch the surface of the polarizer .
Surface of the panel is pressed by fingers & this may
cause “ MURA “
Take out the monitor with cushion Take out the monitor by grasping the LCD panel.
That may cause “ MURA“.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 7
4
Correct Methods : Incorrect Methods :
Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects .
That could scratch the surface of panel
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 8
5
2. Specification
2-1General Specifications
Test Resolution & Frequency 1280x1024 @ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls
2.2 VIDEO INTERFACE
Analog Input Connector DB-15 (Analog) , refer the appendix A
Digital Input Connector DVI-D 24pin, refer the appendix B
Default Input Connector Defaults to the first detected input
Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes
Video Cable Connector DB-15 Pin out Compliant DDC 2B
Video Signals
Video Impedance 75 Ohms (Analog)
Maximum PC Video Signal 950 mV with no damage to monitor
Maximum Mac Video Signal 1250 mV with no damage to monitor
Sync Signals TTL
Factory Default:
Contrast = 70%, Brightness = 100%
1. Video RGB (Analog)
2. DVI (Digital)
Separate
DDC 2B Compliant with Revision 1.3
Sync Compatibility Separate Sync
Video Compatibility
Resolution Compatibility
Exclusions Not compatible with interlaced video
Shall be compatible with all PC type computers,
Macintosh computers, and after market video cards
640 x 350*, 640 x 480, 720 x 400* (640 x 400*), 800 x
600, 832 x 624, 1024 x 768, 1152 x 870, 1280 x 720,
1280 x 960, 1280 x 1024
* The image vertical size might not be full screen.
But the image vertical position should be at the center.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 9
6
2-3 POWER SUPPLY
Power Supply (Adapter) Part Number: 27-D003115
Input Voltage Range 100 TO 240 VAC
Input Frequency Range 50 TO 60 HERTZ
Short Circuit Protection Output can be shorted without damage
Over Current Protection 3.3~4.5 A typical at 5 VDC
Leakage Current 3.5 mA (Max) at 254VAC / 60Hz
EFFICIENCY 80 % typical at 115 VAC Full Load
Fuse Internal and not user replaceable
Power Dissipation 58 (Max) Watt
Max Input AC Current 1.8 A rms @ 100 VAC,
INRUSH CURRENT (COLD START) 120A(max) @ 240VAC , 50Hz
Shall start and function properly when under full load,
Power Supply Cold Start
Power Supply Transient Immunity
Power Supply Line Surge Immunity
Power Supply Missing Cycle Immunity
Power Supply Acoustics
US Type Power Cable
with all combinations of input voltage, input frequency,
and operating temperature
Shall be able to withstand an EN61000-4-4 ±2KV
transient test with no damage
Shall be able to withstand ±2KV (L-L) and ±2.3KV
(L-PE) with no damage
Shall be able to function properly, without reset or visible
screen artifacts, when ½ cycle of AC power is randomly
missing at nominal input
The power supply shall not produce audible noise that
would be detectable by the user. Audible shall defined
to be in compliance with ISO 7779 (DIN EN27779:1991)
Noise measurements of machines acoustics. Power
Switch noise shall not be considered
Separate 3-prong NEMA 5-15P type plug. Length =
1.8m. Connects to display.
European Type Power Cable
CCC Type Power Cable
Power Saving Operation(Method) VESA DPMS Signaling
Power Consumption ON Mode < 58 W (max)
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Color = Black
Schuko CEE7-7 type plug.
Length = 1.8m, Connects to display.
Color = Black
Separate 3-prong type plug.
Length = 1.8m. Connects to display.
Color = Black
Page 10
7
ACTIVE OFF < 2 W
Recovery Time ON MODE = N/A, ACTIVE OFF < 3 SEC
2-4 ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency 30 – 82 KHZ
Vertical Refresh Rate 50 – 85* HZ.
Maximum Pixel Clock 135 MHz (EDID file is 140MHz)
Sync Polarity Independent of sync polarity.
Timing Table
Item Timing Analog Digital
1 640 x 350 @ 70Hz, 31.5kHz Yes Yes
2 640 x 400 @ 60Hz, 31.5kHz Yes* Ye s
3 640 x 400 @ 70Hz, 31.5kHz Yes Yes
4 640 x 480 @ 60Hz, 31.5kHz Yes Yes
5 640 x 480 @ 67Hz, 35.0kHz Yes Yes
6 640 x 480 @ 72Hz, 37.9kHz Yes Yes
7 640 x 480 @ 75Hz, 37.5kHz Yes Yes
8 640 x 480 @ 85Hz, 43.27kHz Yes Yes
9 720 x 400 @ 70Hz, 31.5kHz Ye s Yes
10 800 x 600 @ 56Hz, 35.1kHz Yes Yes
11 800 x 600 @ 60Hz, 37.9kHz Yes Yes
12 800 x 600 @ 75Hz, 46.9kHz Yes Yes
13 800 x 600 @ 72Hz, 48.1kHz Yes Yes
14 800 x 600 @ 85Hz, 53.7kHz Yes Yes
15 832 x 624 @ 75Hz, 49.7kHz Yes Yes
16 1024 x 768 @ 60Hz, 48.4kHz Yes Yes
17 1024 x 768 @ 70Hz, 56.5kHz Yes Yes
18 1024 x 768 @ 72Hz, 58.1kHz Yes Yes
19 1024 x 768 @ 75Hz, 60.0kHz Yes Yes
20 1024 x 768 @ 85Hz, 68.67kHz Yes Yes
21 1152 x 870 @ 75Hz, 68.7kHz Yes Yes
22 1280 x 1024 @ 60Hz, 63.4kHz Yes Yes
23 1280 x 1024 @ 75Hz, 79.97kHz Yes No
24 1280x 720 @ 60Hz, 45kHz (HDTV) Yes Yes
Note 1:When Vertical frequency at 85Hz or resolution, the vertical image size might not be full screen. But the
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 11
8
vertical image position should be at the center.
Note2: *: The vertical image size might not be full screen.
2-5 AUDIO INTERFACE (SPEAKER SPECIFICATION)
Line input connection
Line input signal 1.0Vrms@1kHz
Line input impedance 10k ohm
Maximum power output (Electric) 2W
Signal to Noise Ratio 72db
Frequency response F0 -20kHz (F0: Lowest resonant freq.)
Distortion <8% THD @1kHz
Vibration
Screen image
Connector PC99 requirement Audio in
Cable type / length 3.5mm stereo cable / 1.8m length
Audio DPMS
3.5 mm stereo jack
There should be no audible vibration with volume at
100%. (Input signal within 1 Vrms)
There should be no affect on the screen image
stability under any conditions
Lime Green pantone # 577C
Note: There is no guarantee <1 W power
consumption in Active Off mode, when the Audio
Cable is connected
2-6 TFT LCD PANEL
Panel Source Identify
(1) ID label - The panel code “B” for CMO panel should be shown on the lower right side of ID label. (See
Figure 2)
(2) UPC label - The panel code “B” for CMO panel should be shown on the lower right side of UPC label. (See
Figure 3)
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 12
9
Panel Characteristics:
Model number A190E3
Type TN type with RSDS interface
Active Size 376.32 (H) x 301.056 (V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.294 mm
GLASS TREATMENT Anti Glare (Hard coating 3H)
# OF BACKLIGHTS 4 CCFL (L type); Edge Light BLU
BACKLIGHT LIFE 50,000 Hours (min)
Luminance (Center) –
Condition:
CT = 6500K, Contrast = Max, Brightness = Max
Brightness Uniformity (13 Points)
Contrast Ratio 450 (typ), 250 (min)
Color Depth 16 million colors (6 bit + 2 bit FRC)
Viewing Angle (Horizontal)
VIEWING ANGLE (VERTI CAL)
Response Time
10%-90% @ Ta=25°C
280 cd/m2 (Typ after 15 minute warm up)
180 cd/m2 (M in after 15 minute warm up)
U = 76% (typ), 67% (Min).
U = Min Luminance in 13 points / Max Luminance in 13
points
@ CR>10
Typical: 150
Minimum: 130
@ CR>10
Typical: 130
Minimum: 110
8ms (Tr= 2 ms, Tf = 6 ms) (typ)
18 ms (Tr= 7 ms, Tf = 11 ms) (max)
@ CR>5
Typical: TBD
Minimum: TBD
@ CR>5
Typical: TBD
Minimum: TBD
Panel Defects Please see Panel Quality Specifications.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 13
3. Front Panel Function Control Description
Adjusting the Screen Image
Use the buttons on the front control panel to display and adjust the OSD controls which display
on the screen. The OSD controls are explained at the top of the next page and are defined in
“Main Menu Controls” on page 10.
Main Menu
with OSD controls
Displays the Main Menu or
exits the control screen and
saves adjustments.
Front Control Panel
shown below in detail
Scrolls through menu options and
adjusts the displayed control.
Also a shortcut to display the Contrast
adjustment control screen.
Displays the control screen
for the highlighted control.
Also toggles between two
controls on some screens.
Also a shortcut to toggle
analog and digital connection.
Audio Mute
button turns
the sound off
ViewSonic Corporation Confidential - Do Not Copy VA912/b-3 10
Power light
Green = ON
Orange = Power Saving
Standby Power
On/Off
Page 14
Do the following to adjust the display setting:
1. To display the Main Menu, press button [1].
NOTE: All OSD menus and adjustment screens disappear automatically after about 15
seconds. This is adjustable through the OSD timeout setting in the setup menu.
2. To select a control to adjust, pressSorTto scroll up or down in the Main Menu.
3. After the desired control is selected, press button [2]. A control screen like the one shown
below appears.
The command line at the bottom of the
control screen tells what to do next from
this screen. You can toggle between control
screens, adjust the selected option, or exit
the screen.
4. To adjust the setting, press the up S or down T buttons.
5. To save the adjustments and exit the menu, press button [1] twice.
The following tips may help you optimize your display:
• Adjust the computer's graphics card so that it outputs a 1280 x 1024 @ 60Hz video signal to
the LCD display. (Look for instructions on “changing the refresh rate” in the graphics card's
user guide.)
• If necessary, make small adjustments using H. POSITION and V. POSITION until the
screen image is completely visible. (The black border around the edge of the screen should
barely touch the illuminated “active area” of the LCD display.)
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3 11
Page 15
Main Menu Controls
Adjust the menu items shown below by using the up S and down T buttons.
Control Explanation
Auto Image Adjust sizes and centers the screen image automatically.
Contrast adjusts the difference between the image background (black level)
and the foreground (white level).
Brightness adjusts background black level of the screen image.
Input Select toggles between inputs if you have more than one computer
connected to the VA912/VA912b.
Audio Adjust
Vol um e increases the volume, decreases the volume, and mutes the audio.
Mute temporarily silences audio output.
Color Adjust provides several color adjustment modes, including preset color
temperatures and a User Color mode which allows independent adjustment of
red (R), green (G), and blue (B). The factory setting for this product is 6500K
(6500 Kelvin).
9300K-Adds blue to the screen image for cooler white (used in most office
settings with fluorescent lighting).
6500K-Adds red to the screen image for warmer white and richer red.
5400K-Adds green to the screen image for a darker color.
ViewSonic Corporation Confidential - Do Not Copy VA912/b-3
12
Page 16
Control Explanation
5000K-Adds blue and green to the screen image for a darker color.
User Color Individual adjustments for red (R), green (G), and blue (B).
1. To select color (R, G or B) press button [2].
2. To adjust selected color, pressSandT.
Important: If you select RECALL from the Main Menu when the product is
set to a Preset Timing Mode, colors return to the 6500K factory preset.
Information displays the timing mode (video signal input) coming from the
graphics card in the computer, the LCD model number, the serial number, and
the ViewSonic® website URL. See your graphics card’s user guide for
instructions on changing the resolution and refresh rate (vertical frequency).
NOTE: VESA 1280 x 1024 @ 60Hz (recommended) means that the resolution
is 1280 x 1024 and the refresh rate is 60 Hertz.
Manual Image Adjust Sub-menu
H. Size (Horizontal Size) adjusts the width of the screen image.
H./V. Position (Horizontal/Vertical Position) moves the screen image left or
right and up or down.
Confidential-Do Not Copy VA912/b-3 ViewSonic Corporation 13
Page 17
Control Explanation
Fine Tune sharpens the focus by aligning text and/or graphics with pixel
boundaries.
NOTE: Try Auto Image Adjust first.
Sharpness adjusts the clarity and focus of the screen image.
Setup Menu displays the menu shown below:
Language Select allows the user to choose the language used in the menus and
control screens.
Resolution Notice allows the user to enable or disable this notice.
If you enable the Resolution Notice shown above and your computer is set at a
resolution other than 1280 x 1024, the following screen appears.
OSD Position allows the user to move the OSD menus and control screens.
OSD Timeout sets the length of time the OSD screen is displayed. For example,
with a “30 second” setting, if a control is not pushed within 30 seconds, the
display screen disappears.
Confidential - Do Not Copy VA912/b-3 ViewSonic Corporation 14
Page 18
Control Explanation
OSD Background allows the user to turn the OSD background On or Off.
Memory Recall returns the adjustments back to factory settings if the display is
operating in a factory Preset Timing Mode listed in the Specifications of this
manual.
ViewSonic Corporation 15 Confidential-Do Not Copy VA912/b-3
Page 19
16
4. Circuit Description
Circuit Description
1. Power supply (DC/DC Converter)
The AAT1109 is a one-channel step-up PWM controller incorporating a soft-start and a short circuit protection
(SCP) function. This device consists of an on-chip voltage reference, error amplifier, pulse width modulation
controller, under -voltage lockout protection, soft-start, and
short circuit protection circuits.
ViewSonic Corporation Confidential - Do Not Copy VA912/b-3
Page 20
17
2. Micro Controller
The MTV312M micro-controller is an 8051 CPU core embedded device especially tailored for CRT/LCD Monitor
applications. It includes an 8051 CPU core, 1024-byte SRAM, 14 built-in PWM DACs , VESA DCC interface,
4-channel A/D converter , and a 64K -byte internal program FLASH-ROM.
3. TSU57AK
The TSU57AK is a high performance, and fully integrated graphics process IC solution for LCD monitors with
resolution up to SXGA. It is configured with an integrated triple-ADC/PLL, a high quality scaling engine, an
on-screen display controller, a built-in output clock generator, a panel timing controller (TCON), an integrated DVI
receiver, and RSDS display interface. To further reduce system costs, the TSU57AK also integrates intelligent power
management control capability for green-mode requirements and spread- spectrum support for EMI management.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 21
18
5. Adjusting Procedure
A. Function Test and Alignment Procedure
5.1 All Modes Reset
You should do “All Model Reset” (Refer to Chap 3. Hot Keys for Function Controls) first. This action will allow
you to erase all end-user’s settings and restore the factory defaults.
5.2 Auto Image Adjust
The Auto Adjust is aimed to offer a best screen quality by built-in ASIC. For optimum screen quality, the user
has to adjust each function manually.
A.Turn the computer and LCD monitor on.
B. Press the ‘Auto’ button on monitor keypad to Auto Adjust.
C. The LCD monitor will start the Auto Adjust process automatically and run for 10 consecutive seconds, during
which time you will notice the image change.
5.3 Firmware
Test Patten : Burn in Model (Refer to Chap3. Hot Keys for Function Control)
-Make sure the F/W is the latest version.
5.4 DCC
Test Patten: EDID program
-Make sure it can pass test program.
5.5 Window Shut Down
Test Signal: 1280*1024@60Hz
Test Pattern:
Checkered Pattern Every One Pixel (50%Green & 50%Blue)
Inspection Item: Flicker, Mura
5.6 Window BG
Test Signal: 1280*1024@60Hz
Test Pattern:
Window standard pattern
Inspection Item: Line Defect, Function Defect & Mura
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 22
19
5.7 25 Gray
Test Signal: 1280*1024@60Hz
Test Pattern:
Full Screen 25% White (Gray)
Inspection Item: Particle, Line Defect & Mura
5.8 50 Gray
Test Signal: 1280*1024@60Hz
Test Pattern:
Full Screen 50% White (Gray)
Inspection Item: Bright Dot, Particle, Line Defect & Mura
5.9 White Box
Test Signal: 1280*1024@60Hz
Test Pattern:
Window standard pattern
Inspection Item: Particle, Line Defect, Power, Image Remain & Mura
5.10 Black Box
Test Signal: 1280*1024@60Hz
Test Pattern:
Window standard pattern
Inspection Item: Bright Dot, Line Defect & Power
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 23
20
5.11 RED
Test Signal: 1280*1024@60Hz
Test Pattern:
Full Screen Red
Inspection Item: Bright Dot, Partial & Line Defect
5.12 Green
Test Signal: 1280*1024@60Hz
Test Pattern:
Full Screen Green
Inspection Item: Bright Dot, Partial & Line Defect
5.13 Blue
Test Signal: 1280*1024@60Hz
Test Pattern:
Full Screen Green
Inspection Item: Bright Dot, Partial & Line Defect
5.14 Gray_Scale_0-100_V256
Test Signal: 1280*1024@60Hz
Test Pattern:
Vertical 64 (256) Gray Scale (Right → Left，From 0 to 100% White)
Inspection Item: Line Defect & Function Defect
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 24
21
5.15 Gray_Scale_0-100_H256
Test Signal: 1280*1024@60Hz
Test Pattern:
Horizontal 64(256) Gray Scale (Up → Down，From 0 to 100% White)
Inspection Item: Line Defect & Function Defect
5.16 Block Window
Test Signal: 1280*1024@60Hz
Test Pattern:
Black block at the center
Inspection Item: Cross Talk & Optical Character
5.17 Black_Tile
Test Signal: 1280*1024@60Hz
Test Pattern:
Black tile under white background
Inspection Item: Function Defect & Image Remain
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 25
22
5-18. Function Test Display pattern
From 0
Item
1 Gray_Scale_0-100_V
2 Gray_Scale_0-100_H
3 Black Full Screen Black Figure 3
4 Red Full Screen 50% Red Figure 4
5 Green Full Screen 50% Green Figure 5
6 Blue Full Screen 50% Blue Figure6
7 White Full Screen White Figure7
8 Black_Tile Black Tile Under White Background Figure 8
Pattern Description Remark
Vertical 64 (256) Gray Scale ( 右→左，From 0 to
Figure 1
100% White)
Horizontal 64 (256) Gray Scale (上→下，
Figure 2
to 100% White)
FIGURE 1 FIGURE 2
Figure 4 Figure 3
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 26
23
Figure 5
FIGURE 6 FIGURE 5
FIGURE 8 FIGURE 7
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 27
24
B. BIOS update procedure
BIOS Upda te User Guide
BIOS U FLOW FOR GENESIS
1.1 Program：
1. 1. 1. Software
a. Please download the file “ M-Star” from CMO E-Sir system. There are ISP & BIOS two files, kindly see as
below.
a) ISPACK.EXE: Main program
b) Ancillary .ISPACK.EXE ：Description program
1.1. 2.Hardwar
•D_Sub cable（15Pin）
Point plug
•Point plug [24Pin]
D_Sub cable
OR
1.1.3 Join VGA Cable , PC BASE, see the example picture as below.
Without to affect
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 28
25
1.2 Installation：
A. Please install the program s respectively as below.
B. ISP & BIOS software file to be about to produce the next. (If the file existence already, needn’t to set up.
C. repeat.) This system is applied to Win 95/98/NT/2000.
Isp.lnk
1.3 ISP Execution
1. Settings: Double Click
Isp.lnk
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Fig.1: ISP Tool Main Menu
Page 29
26
2. When ISP Tool executing at the first time, it is required to enter Security
For A190E3
Load MCU File
Data Please press , then input related information as Fig.2.
4C
7C 4C 77
Key in “OK”
3. Select correct Micro Controller as Fig.3.
Step 2
Step 1
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 30
27
4. Installation software, Select want download correct file
The path of software
Press RUN
Step 4
Step 3 Example :
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 31
28
1.4.Verification BIOS Update whether success
5. When everything is done. Please turn off the power and restart it again.
Check Factory Mode and make sure it already be updated.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 32
29
C. Monitor Assembly and Disassembly
Seat Hinge.
1. Separate Stand Assy
1.1 Remove Stand Cover
Step 1 :
Press Stand Assy’s bottom part in
Step 2 :
Remove Cover Hinge.
Step 3 :
Loose and Remove 4 screws.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Step 4:
Remove Stand Assy.
Step 5:
Completed
Page 33
30
2. Separate Rear Cover (Rear Case Assy)
Loosen and remove 5 screws.
Separate Bezel hooks to take Bezel and Rear Cover apart.
Step 1 :
Loose and remove 2 screws.
Step 2 :
Separate Bezel hooks to take
Bezel and Rear Cover apart.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Step 3 :
Remove Rear Cover.
Step 4 :
Completed
Page 34
31
3. Remove Power Board
3.1 Remove 2 pieces of Backlight wires.
3.2 Remove Metal Cover
Step 1 :
Loose and remove 4 screws.
Step 2 :
Loose and remove 2 screws.
Step 3 :
Loose and remove 4 screws.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 35
32
Step 4 :
Remove the Cover of X-PCB.
Step 5 :
Completed
3.3 Remove Power PCBA
Step 1 : Insert 2 pieces of Backlight wires.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Step 2 :
Loose and remove 4 screws.
Page 36
33
Step 3 :
Remove Power PCBA.
Step 4 :
Completed
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 37
34
4. Change New Power Board
Step 1 :
Insert New Power PCBA.
Step 2 :
Fasten 4 fixed screws
of Power PCBA .
Step 3 :
Completed
5. Remove AD PCBA
5.1 Remove FFC
Step 1 :
Remove 2 FFC from AD PCBA.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 38
35
Step 2 :
Remove FFC
5.2 Remove AD PCBA
Step 1 :
Loose and remove 4 screw
Step 2 :
Remove AD PCBA.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 39
36
Step 3 :
Completed
6. Change New AD PCBA
Step 1 :
Place New AD PCBA.
Step 2 :
Fasten 4 screw.
Step 3 :
Insert FFC.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 40
37
Step 4 :
Insert 2 FFC.
Step 5 :
7 Remove OSD PCBA
Completed
Step 1 :
Remove FFC.
Step 2 :
Separate both Audio Cable.
Step 3 :
Take OSD PCBA apart.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 41
38
Step 4 :
8. Change New OSD PCBA
Completed.
Step 1 :
Place New OSD PCBA.
Step 2 :
Insert Audit Cable to connectors
of OSD PCBA.
Step 3 :
Completed.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 42
39
9. Add Cover to AD PCB Heatsink
Step 1 :
Join the cover hooks of X-PCB.
Step 2 :
Fasten the 4 screws.
Step 3 :
Fasten 2 screws.
Step 4 :
Fasten the 4 screws.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Step 5 :
Completed
Page 43
40
10. Rear Assy Assembly
Step 1 :
Place Rear Cover.
Step 2 :
Join Rear Cover with Bezel.
Step 3 :
Fasten 2 screws.
Step 4 :
Completed
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 44
41
11. Stand Assy Assembly
Step 1 :
Place Stand Assy .
Step 5 :
Fasten 4 screws to fixed Stand Assy.
Step 6 :
Insert Cover Hinge.
Step 7 :
Place Stand Assy.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 45
42
6. Trouble Shooting Flow Chart
Check PCB
Check Panel
Particle
Check PCB
Check PCB
Check Panel
Next Step
Defect Mode Failure Analysis Repair Testing
Light On Test
※ Panel Change” Should be Performed to Level 3 Repair stage
Abnormal
Display
Missing Line
Bright Dot
Dark Dot
Backlight
Light Leakage
Mura
Image Sticking
Check Panel
AD/B Change
Panel Change
Panel Change
Brightness spot
Dot Defect
No display
AD/B Change
P/B Change
Check Panel
Check Wire
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Noise
A
CNT/B Change
Panel Change
D-sub cable
change
AD/B Change
Panel Change
N
Completed
TEST
Page 46
43
Defect Mode Failure Analysis Repair Testing
Check PCB
Check Panel
Check
PCB
Check Panel
Down
Check PCB
Check Panel
No signal
Check PCB
Check PCB
Check Panel
Check PCB
Check Panel
change
Next Step
A
“ Panel Chan
Flicker
AD/B Change
P/B Change
Panel Change
Gray value
display
R.G.B display
abnormal
Check Wire
Display Shut
AD/B Change
Panel Change
AD/B Change
CNT/B Change
Panel Change
D-sub cable
AD/B Change
P/B Change
Panel Change
Power on
Display
abnormal
Check Wire
AD/B Change
CNT/B Change
D-sub cable change
AD/B Change
Panel Change
NG
TEST
Completed
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 47
44
Defect Mode Failure Analysis Repair Testing
LED Off
Check PCB
No Power
Check PCB
Power wire connector
Cable change
Next Step
Unavailable
LED Dark
LED Abnormal
LED Flicker
※ “ Panel Change” Should be Performed to Level 3 Repair stage
ON/OF
Abnormal
LED display
abnormal
Check Wire
AD/B Change
P/B Change
CNT/B Change
PW cable Change
OSD cable Change
AD/B Change
P/B Change
Abnormal
Keyboard
Check Wire
Check PCB
Check Wire
OSD cable Change
AD/B Change
P/B Change
OSD cable Change
NG
TEST
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Completed
Page 48
45
Defect Mode Failure Analysis Repair Testing
Can’t Input
Can’t Reader
Down
Check PCB
Check Panel
Check
Panel
Next Step
&OSD
Abnormal BIOS
Other Abnormal
Display
※ “ Panel Change” Should be Performed to Level 3 Repair stage
Check PCB
Check Wire
Display Shut
AD/B Change
CNT/B Change
D-sub cable change
AD/B Change
P/B Change
CNT/B Change
Display flicker
(tapping )
Check PCB
Panel Change
AD/B Change
CNT/B Change
P/B Change
NG
TEST
Completed
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 49
46
u Trouble Shooting Analysis
Check the information in this section to see if the problems can be solved before requesting repair.
Note：The consumers are only allowed to solve the problems described as below. Any unauthorized
product modification, or failure to follow instructions supplied with the product will end the warranty
immediately.
l No image
u Make sure power button is ON.
u Check whether the LCD monitor and computer power cords are plugged and whether there is a
supply of power.
l No Signal Input
u Check the signal connection between the computer and LCD monitor.
l “Out of Range”
u Check the computer image output resolution and frequency and compare the value with the
preset values (Please refer to [Appendix-Display Mode]).
l Fuzzy Image
u Adjust Phase.
l Image too bright
u Adjust brightness and contrast by OSD.
l Image too dark
u Adjust brightness and contrast by OSD.
l Irregular image
u Check the signal connection between the computer and LCD monitor.
u Perform Auto Adjust .
l Distorted image
u Reset the LCD monitor
u Take off extra accessories (such as signal extension cord) .
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
l Image is not centered
u Use OSD Image Menu to adjust H_Position and V_Position.
u Check image size setting.
u Perform Auto Adjust.
l Size is not appropriate
Page 50
47
u Use OSD Image Menu to adjust H_Position and V_Position.
u Check image size setting.
u Perform Auto Adjust.
u Use OSD Color Menu to adjust color setting.
l Color too dark
u Use OSD Color Menu to adjust color setting.
l Dark area distorted
u Use OSD Color Menu to adjust color setting.
l White color is not white
u Use OSD Color Menu to adjust color setting.
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 51
Ref. P/N
Location
Universal number#
Q'ty
mA, 2380 V
SHENG, 18AWG, Black, No Bag
(AJ0E3H1K1F/2F)
Linetek, 18AWG, No Bag
Linetek, 18AWG, No Bag
18AWG, PSB Mark, Linetek, No Bag
08, Black, BSMI, 1800 mm, I Sheng
(AJ0E3H1W1F/2F)
Rev.07
Rev.31
)
)
)
)
)
Black, JCE
Pins, no AL foil
Black, JCE
FFC-OSD, 22 Pins, TennRich
CB-00004035
32-D003899
32-D003899
1
mm, Chang Huang, VSC_VA912-3
)
Label, Bar-Code Labe, 55*13mm
DC-00002073
7741519181
7741519181
1
F)
A190E3-H0F
)
7. Recommend Spare Parts List (RSPL)
RECOMMENDED SPARE PARTS LIST (VA912-3)
ViewSonic Model Number: VS10931-1W
Rev: 1a
Serial No. Prefix: PUQ
Item ECR/ECN ViewSonic P/N
Accessories:
1
2
3
4
5
6
Board Assembly:
7
8
9
10
11
12
13
Cables:
14
15
16
17
Documentation:
18
19
20
21
22
23
Description
Adapter, Lips Without Audio, DAC-19M001
BF, Ver:00 A, 19 V/2.5 A, 5 V/3 A, 4L, 4.9
Power Code, CEE, SP-023+IS-14, H05VV-F,
3G, 0.75mm2, CT-12, L=1800+/-50mm, I-
Power Code, UL, SVT#18/3C, 75℃, LP30B+LS-13, L=1830+/-50mm, Black,
Power Cord CCC, 300/500V, 0.75mm2, 3C,
PC-323+COC-01, L=1830+/-50mm, Black,
Power Cord, BSI, H05VV-F, 0.75mm2, 3C,
LP-60L+LS-60, L=1830+/-50mm, Black,
Power Cord, VCTF 3G 0.75mm^2 CNS CT-
PCBA for , A190E3, A190E3-H-S1, 301-72,
PCBA for , A190E3, A190E3-T-K, 303-02,
Bezel Assy, A190E3-H0F, SILVER
PANTONE 877C, Injex
Cover Hinge, A190E3-H0F, ABS PA-757N,
BLACK C_J91A11B5, Injex
Rear Assy, A190E3-H0F, BLACK C, Injex C-00004028
Seat Assy, A190E3-H0F, BLACK C, Hontech
Precision Industry
Stand Assy, A190E3-H0F, BLACK C,
Hontech Precision Industry
Audio Cable, A150X2, 18AWG, 180cm,
FFC_X, 0.50x45x62xCx(5/5)x(0.175x0.3), 45
Monitor Cable, A150X2, 30AWG, 180cm,
Carton Label for , A190E3-H0F, 20 mmx20
Carton Label for , A190E3-H0F, 76.2
mmx76.2 mm, Chang Huang, VSC(VA912-3)
MENU for VSC_VA912-3, Paper, 1C, YiChing Special Printing, A190E3-H0F
MENU for VSC_VA912-3+Caution Card,
Paper, 1C, Yi-Ching Special Printing,
Safety Label for , A190E3-H0F, 120 mmx50
mm, Chang Huang, VSC_VA912-3
A-00004021
A-00002059
A-00000458
A-00002058
A-00002057
A-00004047
B-00004022
B-00004023
C-00004025
C-00004026
C-00004030
C-00004032
CB-00000544
CB-00004034
CB-00000547
DC-00004036
DC-00004037
DC-00004039
DC-00004040
DC-00004041
27-D003115 27-D003115 1
32E1818018
(AJ0E3H1E1F/2F)
32E1818015
(AJ0E3H1A1F/2F)
32E1818013
(AJ0E3H1C1F/2F)
32E1818060
(AJ0E3H1K1F/2F)
32-D001922
35-D004062 35-D004062 1
35-D002998 35-D002998 1
40-D003819
(AJ0E3H1A.C.E.K.W2F
40-D003812
(AJ0E3H1A.C.E.K.W2F
40-D003818
(AJ0E3H1A.C.E.K.W2F
40-D003821
(AJ0E3H1A.C.E.K.W2F
40-D003820
(AJ0E3H1A.C.E.K.W2F
32F2818004 32F2818004 1
32-D000557 32-D000557 2
32F3018003 32F3018003 1
77-D004154
77-D004123
(AJ0E3H1A.C.E.K.W2F
76-D004095
(AJ0E3H1C.E.K.W1F/2
76-D004134
(AJ0E3H1A1F/2F)
77-D004087
(AJ0E3H1A.C.E.K.W2F
32E1818018 1
32E1818015 1
32E1818013 1
32E1818060 1
32-D001922 1
40-D003819 1
40-D003812 1
40-D003818 1
40-D003821 1
40-D003820 1
77-D004154 1
77-D004123 1
76-D004095 1
76-D004134 1
77-D004087 1
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
48
Page 52
Item ECR/ECN ViewSonic P/N
Ref. P/N
Location
Universal number#
Q'ty
Screw, M3*P0.5*4, f5.5*2
HW-00000553
42A9930008
2000
Screw, M3*P1.27*12, f5.5*2
HW-00000556
42A9990005
2000
SCREW, head D8
Stand-Off 4 #-40*11.8
M-00000559
42A9940007
2000
L900xW50x0.045mm, VSC
)
PE_Foam(BOTTOM)
PE_Foam(TOP)
Inner Box, 456x290x38mm, A190E1-H01
P-00000594
7841935111
7841935111
1
A190E1-H01, white
49
24
Hardware:
25
26
27
28
Miscellaneous:
29
Packing
Material:
30
31
32
33
34
Description
SCREW, M4, P=0.7 mm, L=15 mm, Special
Thin Head, Phillips Cross Recess,
Screw_with_Washer, SHYE CHING SCREW
SCREW, M4, P=0.7 mm, L=8 mm, Round
Head, Phillips Cross Recess, plate Ni,
Screw_with_Washer, SHYE CHING
Tape, Security Tape, OPP,
Carton, A190E3-H0F, 536 mmx148 mmx475
mm, Chen Ti Paper, VSC_VA912-3
Cushion, A190E3-H0F, PE_LD, White, 530
mmx140 mmx50 mm, N/A, Hwa Chang,
Cushion, A190E3-H0F, PE_LD, White, 530
mmx140 mmx50 mm, N/A, Hwa Chang,
PE Foam Bag, Protector, 570*600*0.13,
HW-00002442
HW-00004042
M-00000560
P-00004043
P-00004045
P-00004046
P-00000595
42A9930008
42A9990005
42-D000314 42-D000314 2000
42-D000649 42-D000649 2000
42A9940007
7345511002 7345511002 1
78-D004088
(AJ0E3H1A.C.E.K.W2F
78-D003913 78-D003913 1
78-D003911 78-D003911 1
7841919921 7841919921 1
78-D004088 1
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 53
Ref. P/N
Location
Universal number#
Q'ty
Linetek, No Bag
BSMI, 1800 mm, I Sheng
(AJ0E3H1W1F/2F)
D001922
PCBA for , A190E3, A190E3-T-K, 303-02, Rev.31
B-00004023
35-D002998
1
40-D003822
(AJ0E3H1A.C.E.K.W1F)
40-
D003822
Gray_H93828B5, Injex
(AJ0E3H1A.C.E.K.W1F)
D003808
40-D003817
(AJ0E3H1A.C.E.K.W1F)
40-
D003817
Precision Industry
(AJ0E3H1A.C.E.K.W1F)
D003815
Precision Industry
(AJ0E3H1A.C.E.K.W1F)
D003816
AL foil
FFC-OSD, 22 Pins, TennRich
CB-00004035
32-D003899
1
Label, Bar-Code Labe, 55*13mm
DC-00002073
7741519181
1
)
Huang, VSC_VA912b-3
(AJ0E3H1A.C.E.K.W1F)
D004094
Screw, M3*P0.5*4, f5.5*2
HW-00000553
42A9930008
2000
Screw, M3*P1.27*12, f5.5*2
HW-00000556
42A9990005
2000
CHING SCREW, head D8
Stand-Off 4 #-40*11.8
M-00000559
42A9940007
2000
mmx50 mm, N/A, Hwa Chang, PE_Foam(TOP)
white
RECOMMENDED SPARE PARTS LIST (VA912b-3)
ViewSonic Model Number: VS10931-1W
Rev: 1a
Serial No. Prefix: PUR
Item ECR/ECN ViewSonic P/N
Accessories:
1
2
3
4
5
6
Board Assembly:
7
8
Cabinets:
9
10
11
12
13
Cables:
14
15
16
17
Documentation:
18
19
20
21
22
23
Hardware:
24
25
26
27
Miscellaneous:
28
Packing Material:
29
30
31
32
33
Adapter, Lips Without Audio, DAC-19M001 BF, Ver:00
A, 19 V/2.5 A, 5 V/3 A, 4L, 4.9 mA, 2380 V
Power Code, CEE, SP-023+IS-14, H05VV-F, 3G,
0.75mm2, CT-12, L=1800+/-50mm, I-SHENG, 18AWG,
Black, No Bag
Power Code, UL, SVT#18/3C, 75℃, LP-30B+LS-13,
L=1830+/-50mm, Black, Linetek, 18AWG, No Bag
Power Cord CCC, 300/500V, 0.75mm2, 3C, PC323+COC-01, L=1830+/-50mm, Black, Linetek, 18AWG,
Power Cord, BSI, H05VV-F, 0.75mm2, 3C, LP-60L+LS60, L=1830+/-50mm, Black, 18AWG, PSB Mark,
Power Cord, VCTF 3G 0.75mm^2 CNS CT-08, Black,
PCBA for , A190E3, A190E3-H-S1, 301-72, Rev.07 B-00004022
Bezel Assy, A190E3-H0F, Midnight Gray, Injex C-00004024
Cover Hinge, A190E3-H0F, ABS PA-757N, Midnight
Rear Assy, A190E3-H0F, Midnight Gray, Injex C-00004029
Seat Assy, A190E3-H0F, Midnight Gray, Hontech
Stand Assy, A190E3-H0F, Midnight Gray, Hontech
Audio Cable, A150X2, 18AWG, 180cm, Black, JCE CB-00000544
FFC_X, 0.50x45x62xCx(5/5)x(0.175x0.3), 45 Pins, no
Monitor Cable, A150X2, 30AWG, 180cm, Black, JCE CB-00000547
Carton Label for , A190E3-H0F, 76.2 mmx76.2 mm,
Chang Huang, VSC(VA912b-3)
MENU for VSC_VA912-3, Paper, 1C, Yi-Ching Special
Printing, A190E3-H0F
MENU for VSC_VA912-3+Caution Card, Paper, 1C, YiChing Special Printing, A190E3-H0F
Safety Label for , A190E3-H0F, 120 mmx50 mm, Chang
SCREW, M4, P=0.7 mm, L=15 mm, Special Thin Head,
Phillips Cross Recess, Screw_with_Washer, SHYE
CHING SCREW
SCREW, M4, P=0.7 mm, L=8 mm, Round Head, Phillips
Cross Recess, plate Ni, Screw_with_Washer, SHYE
Tape, Security Tape, OPP, L900xW50x0.045mm, VSC M-00000560
Carton, A190E3-H0F, 536 mmx148 mmx475 mm, Chen
Ti Paper, VSC_VA912b-3
Cushion, A190E3-H0F, PE_LD, White, 530 mmx140
mmx50 mm, N/A, Hwa Chang, PE_Foam(BOTTOM)
Cushion, A190E3-H0F, PE_LD, White, 530 mmx140
Inner Box, 456x290x38mm, A190E1-H01 P-00000594
PE Foam Bag, Protector, 570*600*0.13, A190E1-H01,
Description
A-00004021
A-00002059
A-00000458
A-00002058
A-00002057
A-00004047
C-00004027
C-00004031
C-00004033
CB-00004034
DC-00004038
DC-00004039
DC-00004040
DC-00004048
HW-00002442
HW-00004042
P-00004044 78-D004092
P-00004045
P-00004046
P-00000595
27-D003115
32E1818018
(AJ0E3H1E1F/2F)
(AJ0E3H1K1F/2F)
32E1818015
(AJ0E3H1A1F/2F)
32E1818013
(AJ0E3H1C1F/2F)
32E1818060
(AJ0E3H1K1F/2F)
32-D001922
35-D004062
40-D003808
40-D003815
40-D003816
32F2818004
32-D000557
32F3018003
77-D004122
(AJ0E3H1A.C.E.K.W1F)
76-D004095
(AJ0E3H1C.E.K.W1F/2F
76-D004134
(AJ0E3H1A1F/2F)
77-D004094
42-D000314
42-D000649
7345511002
(AJ0E3H1A.C.E.K.W1F)
78-D003913
78-D003911
7841935111
7841919921
27-D003115
32E181801
8
32E181801
5
32E181801
3
32E181806
0
32-
35-D004062
35-D002998
40-
40-
40-
32F2818004
32-D000557
32F3018003
32-D003899
77D004122
7741519181
76D004095
76D004134
77-
42A9930008
42A9990005
42-D000314
42-D000649
42A9940007
7345511002
78D004092
78-D003913
78-D003911
7841935111
7841919921
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2000
2000
1
1
1
1
1
1
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
50
Page 54
Backlight Unit,A190E3
FFC,0.50x45x62xCx(5/5)x(0.175x0.3),45 Pins
Recess,plate Ni,Screw_with_Washer
PCBA Cover Assy,A190E3,ASSY
BOM LIST (VA912/b-3)
51
ViewSonic Model Number: VS10931-1W
Rev: 1a
Item ViewSonic P/N Ref. P/N Description Location Q'ty
1 #N/A MJ0E501K01 19" Semi Product,19E5-L01,Default 1
2 #N/A L3J005XXXX 19"E5 TN PS Asahi 0.7mm glass common 1
CF Polarizer M190E5,383.15x307.85x0.215,135°,Optimax LPT-
3 #N/A 7414119023
4 #N/A 7414119024
5 #N/A 36-D001339 Driver IC,Scan,A170E1,HX8633CPD400,256Channel common 1
6 #N/A 36X8002971
7 #N/A 7344191017 ACF,AC-4251FY-16,100M/RL common 0.00398
8 #N/A 73-D002676 ACF,PCB,AC-9825R-35,100000 mmx1.5 mm common 0.00398
9 #N/A 73-C000047 ACF,COG,AC-8405Z-23 1.5mmX100M,100000 mmx1.5 mm common 0.00398
10 #N/A 35-D002646 PCBA for ,A190E3-H,A190E3-H-X,301-03,Rev.03 common 1
11 #N/A 7349951002 Silicone,TORAY/-9187L,白色,330g common 0.4
12 #N/A PJ0EFH0Q06 Olympic,A190E3,Function BOM,D-sub+DVI+Audio,Morning Star, 1
13 #N/A 44-D003904
14 #N/A 41-D002813 Metal Frame Front Assy,A190E3,assy common 1
15 CB-00004034 32-D000557
16 #N/A 41-D000546 Cover AD Assy,A190E3,ASSY common 1
17 HW-00000556 42A9990005 Screw,M3*P1.27*12
18 HW-00000553 42A9930008 Screw,M3*P0.5*4 common 15
19 HW-00004042 42-D000649
20 #N/A 41-D000632
21 #N/A 73-D004702 Isolated Tape,PET,147 mmx137 mmx0.1 mm common 1
22 A-00004021 27-D003115
23 C-00004030 40-D003821 Seat Assy,A190E3-H0F,BLACK C 1
24 B-00004023 35-D002998 PCBA for ,A190E3,A190E3-T-K,303-02,Rev.31 1
25 CB-00004035 32-D003899 FFC,22 Pins 1
26 HW-00002442 42-D000314 SCREW,M4,P=0.7 mm,L=15 mm,Special Thin Head 4
27 M-00000559 42A9940007 Stand-Off 4 #-40*11.8 common 4
28 #N/A 73-D001960 Spacer,tape,BLACK,308 mmx2 mmx0.1 mm common 2
29 #N/A 73-D002812 Spacer,polyester film,black,379 mmx2.5 mmx0.08 mm common 2
HL56-T12AGA1SU common 1
TFT Polarizer M190E5,380.52x304.13x0.215,135°,Optimax LPTHL56-T12SU common 1
Driver IC,COF,Data,HX8002CB97,COF,A190E3-H&M190E5L01,384Channel common 10
common 1
common 2
SCREW,M4,P=0.7 mm,L=8 mm,Round Head,Phillips Cross
common 1
common 1
Lips Without Audio,DAC-19M001 BF,Ver:00 A,19 V/2.5 A,5 V/3
A,4L,4.9 mA,2380 V common 1
30 B-00004022 35-D004062 PCBA for ,A190E3,A190E3-H-S1,301-72,Rev.07 common 1
Olympic,19",Accessory BOM,D-sub+Audio,USA 3 pin,Black,Power
built-in;RoHS
Olympic,19",Accessory BOM,D-sub+Audio,China 3
pin,Black,Power built-in;RoHS
Olympic,19",Accessory BOM,D-sub+Audio,European / Korea 2
PJ0EAAS000(A1F.A2F)
PJ0EACS000(C1F.C2F)
PJ0EAET000(E1F.E2F)
PJ0EAKU000(K1F.K2F)
31 #N/A
32 CB-00000544 32F2818004 Audio Cable,A150X2,18AWG,180cm,Black,JCE common 1
33 CB-00000547 32F3018003 Monitor Cable,A150X2,30AWG,180cm,Black,JCE common 1
34 #N/A 32-D001922 Power Cord,VCTF 3G 0.75mm^2 CNS CT-08,Black,BSMI,1800 mm W1F.2F 1
PJ0EAW5000(W1F.W2F)
pin,Black,Power built-in;RoHS
Olympic,19",Accessory BOM,D-sub+Audio,None,Black,Two power
cords of UK & EU for VSC,Power built-in;RoHS
Olympic,19",Accessory BOM,D-sub+Audio,Taiwan 3
pin,Black,Power built-in;RoHS 1
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 55
Item ViewSonic P/N Ref. P/N Description Location Q'ty
Cover Hinge,A190E3-H0F,ABS PA-757N
og Port
RSDS,Dual+Audio
Label,Bar-Code Labe
Carton Label for ,A190E3-H0F
Cushion,A190E3-H0F,PE_LD,White,530 mmx140 mmx50 mm
Inner Box,456x290x38mm, A190E1-H01
Carton,A190E3-H0F
PE Foam Bag,Protector,570*600*0.13,A190E1-H01,white
52
Olympic,A190E3,ID BOM,D-sub+DVI+Audio,USA,Black,VSC,
Olympic,19",ID BOM,D-sub+DVI+Audio,USA,Silver Black,VSC,
Olympic,A190E3,ID BOM,D-sub+DVI+Audio,China,Black,VSC,
Olympic,A190E3,ID BOM,D-sub+DVI+Audio,China,Silver
Black,VSC,
PJ0EI1F300(A1F)
PJ0EI2F300(A2F)
PJ0EI1F303(C1F)
PJ0EI2F303(C2F)
PJ0EI1F301(E1F)
PJ0EI2F301(E2F)
PJ0EI1F302(K1F)
PJ0EI2F302(K2F)
PJ0EI1F304(W1F)
35 #N/A
36 C-00004025 40-D003819 Bezel Assy,A190E3-H0F,SILVER PANTONE 877C A.C.E.K.W2F 1
37 C-00004028 40-D003818 Rear Assy,A190E3-H0F,BLACK C A.C.E.K.W2F 1
38 C-00004032 40-D003820 Stand Assy,A190E3-H0F,BLACK C A.C.E.K.W2F 1
39 C-00004026 40-D003812
40 #N/A 10-D003929
41 #N/A 10-D003930
42 #N/A 10-D003931
43 P-00002378 73-D001222 Panel Protector Film,A190E2-H06,mylar common 1
44 #N/A 7345511002 Tape,Security Tape,OPP,L900xW50x0.045mm,VSC common 0.058
45 DC-00004041 77-D004087 Safety Label for ,A190E3-H0F A.C.E.K.W2F 1
46 #N/A 77-D004093 SN Label for ,A190E3-H0F A.E.K.W2F 1
47 #N/A 7741519181
48 #N/A 7741513161 Label,Pallet Barcode Label common 0.021
49 DC-00004036 77-D004154
50 P-00004045 78-D003913 Cushion,A190E3-H0F,PE_LD,White,530 mmx140 mmx50 mm common 1
51 P-00004046 78-D003911
52 #N/A 7841935111
53 P-00004043 78-D004088
54 #N/A 7841919921
55 #N/A 7841595111 Corner Protector common 0.083
56 #N/A 7841995111 Separator,1130x955x11,A190E1-H01 common 0.021
57 #N/A 78-D001493 Pallet,A170E1-H01,Wooden,1150 mmx920 mmx135 mm common 0.021
58 DC-00004039 76-D004095 MENU for VSC_VA912-3,Paper,1C,A190E3-H0F C.E.K.W2F 1
59 #N/A 79-D003912 Shipping Package Information for ,A190E3-H0F,VSC common 1
PJ0EI2F304(W2F)
Olympic,A190E3,ID BOM,Dsub+DVI+Audio,European,Black,VSC,
Olympic,A190E3,ID BOM,D-sub+DVI+Audio,European,Silver
Black,VSC,
Olympic,A190E3,ID BOM,D-sub+DVI+Audio,UK,Black,VSC,
Olympic,A190E3,ID BOM,D-sub+DVI+Audio,UK,Silver
Black,VSC,
Olympic,A190E3,ID BOM,D-sub+DVI+Audio,TWN,Black,VSC,
Olympic,A190E3,ID BOM,D-sub+DVI+Audio,TWN,Silver
Black,VSC, 1
A.C.E.K.W2F 1
Software (EDID_DSUB),A190E3,Ver.NRVSCxxxxA00,ViewSonic,Checksum(xx),Anal
common 1
Software
(EDID_DVI),A190E3,Ver.NRVSCxxxxD00,ViewSonic,Checksum(x
x),DVI Port common 1
Software
(BIOS),A190E3,Ver.NR19E3HS3000,ViewSonic,Checksum(xxxx),
common 1
common 1
common 1
common 1
common 1
A.C.E.K.W2F 1
common 1
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
Page 56
8. Exploded Diagram and Exploded Parts List
ViewSonic Corporation Confidential
53
-
Do Not Copy VA912/b-3
ViewSonic Corporation
Model
Title
Date Rev:
Page 57
Bezel Assy,A190E3-H0F,SILVER PANTONE 877C
EXPLODED PARTS LIST (VA912/b-3)
ViewSonic Model Number: VS10931-1W
Rev: 1a
Item ViewSonic P/N Ref. P/N Description Q'ty
1 #N/A PJ0EFH0Q06 ISM_A190E3_HAT 1
2 C-00004025 40-D003819
2-1 #N/A 40-D003809 BEZEL 1
2-2 #N/A 40-D003811 LENS 1
2-3 #N/A 40-D003805 KEYPAD 1
2-4 #N/A 33-D000377 SPEAKER 4 ohm 2W 2
2-5 #N/A 42-D001524 SCREW T2.5*10L 4
2-6 #N/A 77-D000226 VSC BIRDLOGO 1
2-7 #N/A 77-D000224 VSC NAME PLATE 1
3 #N/A 73-D004605 MYLAR PCBX 1
4 #N/A 73-D005094 MYLAR LIGHT LEAKAGE 1
5 C-00004028 40-D003818 Rear Assy,A190E3-H0F,BLACK C 1
5-1 #N/A 40-D003813 REAR 1
5-2 #N/A 41-D003804 SUPPORT PLATE 1
5-3 HW-00000557 42A9930017 SCREW T3*8L 1
5-4 #N/A 40-D000227 RUBBER CAP 4
6 HW-00000556 42A9990005 Screw,M3*P1.27*12, 2
7 C-00004032 40-D003820 Stand Assy,A190E3-H0F,BLACK C 1
8 HW-00002442 42-D000314 SCREW,M4,P=0.7 mm,L=15 mm 4
9 C-00004026 40-D003812 COVER HINGE , A190E3-H0F 1
10 C-00004030 40-D003821 Seat Assy,A190E3-H0F,BLACK C 1
10-1 #N/A 40-D003801 SEAT 1
10-2 #N/A 40A1769201 RUBBER FOOT 6
1
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
54
Page 58
9. Block Diagram
Audio In
OSD Key Pad / Audio Out
Speaker
Digital Video
Analog Video
AC Power
DVI-D
D-sub
DC/DC
DC-5V
Main Board
LIPS
3.3V
LCD Module
Signal
DC-19V
Backlight
ViewSonic Corporation Confidential - Do Not Copy VA912/b-3
55
Page 59
10. Schematic Diagrams
B7
V5A
LED_OR
LED_GR
MENU
KEY_DOWN
KEY_UP
AUTO_ADJ
PWR_SW
AUDIO_ON
OPTION1
OPTION2
VOL1
V33C
V5
INV_ADJ
SOURCE_SELECT
B9
INVERTER I/F
OSD
INV_ON/OFF
LED_OR
LED_GR
SOURCE_SELECT
MENU
KEY_DOWN
KEY_UP
AUTO_ADJ
PWR_SW
AUDIO_ON
OPTION1
OPTION2
VOL1
INV_ADJ
DDC_CLK
DDC_DAT
V5A
V5A_ESD
V5A
INV_ON/OFF
DCDC_ON/OFF
PANEL_ON/OFF
VCM_PWM
XAO
VGH
VGL
VAA
B2
V5A
VGA_5V
DDC_CLK
DDC_DAT
V5A_ESD
B3
V5A_ESD
V5A
B4
DDC_CLK
DDC_DAT
OPTION1
OPTION2
LED_OR
LED_GR
SOURCE_SELECT
MENU
KEY_DOWN
KEY_UP
AUTO_ADJ
PWR_SW
V5A
AUDIO_ON
INV_ON/OFF
DCDC_ON/OFF
PANEL_ON/OFF
VCM_PWM
XAO
B5
DCDC_ON/OFF
VGH
VGL
VAA
V5
V5A
PANEL_ON/OFF
VCM_PWM
VAA
V5A
POWER
VGA
DVI
HWRESET
DC/DC
GMA[1..14]
V33C
GNDR
GNDG
HSYNC
VSYNC
VGA_5V
MCU
SDA
V18C
V33P
RIN
GIN
SOG
BIN
GNDB
R+
G+
B+
CLK+
CLK-
CSZ
SCL
INT
AD0
AD3
AD1
AD2
B6
VCM
B10
B1
OR0N
RIN
GNDR
GIN
GNDG
SOG
BIN
GNDB
HSYNC
VSYNC
R+
R-
G-
B-
GMA[1..14]
R-
G+
G-
B+
B-
CLK+
CLK-
CSZ
SCL
SDA
HWRESET
INT
AD0
AD3
AD1
AD2
RIN
GNDR
GIN
GNDG
SOG
BIN
GNDB
HSYNC
VSYNC
R+
R-
G+
G-
B+
B-
CLK+
CLK-
V5A
CSZ
SCL
SDA
HWRESET
INT
AD0
AD3
AD1
AD2
INV_ADJ
VOL1
V18C
V33C
SCALER
OR0P
OR1N
OR1P
OR2N
OR2P
OG0N
OG0P
OG1N
OG1P
OG2N
OG2P
OB0N
OB0P
OB1N
OB1P
OB2N
OB2P
OCLKP
OCLKN
ER0N
ER0P
ER1N
ER1P
ER2N
ER2P
EG0N
EG0P
EG1N
EG1P
EG2N
EG2P
EB0N
EB0P
EB1N
EB1P
EB2N
EB2P
ECLKP
ECLKN
ESTH
OSTH
STB
POL
STV
CKV
OE
GVON
GVOFF
OR0N
OR0P
OR1N
OR1P
OR2N
OR2P
OG0N
OG0P
OG1N
OG1P
OG2N
OG2P
OB0N
OB0P
OB1N
OB1P
OB2N
OB2P
OCLKP
OCLKN
ER0N
ER0P
ER1N
ER1P
ER2N
ER2P
EG0N
EG0P
EG1N
EG1P
EG2N
EG2P
EB0N
EB0P
EB1N
EB1P
EB2N
EB2P
ECLKP
ECLKN
ESTH
OSTH
STB
POL
STV
CKV
OE
GVON
GVOFF
PANEL_INTERFACE
OR0N
OR0P
OR1N
OR1P
OR2N
OR2P
OG0N
OG0P
OG1N
OG1P
OG2N
OG2P
OB0N
OB0P
OB1N
OB1P
OB2N
OB2P
OCLKP
OCLKN
ER0N
ER0P
ER1N
ER1P
ER2N
ER2P
EG0N
EG0P
EG1N
EG1P
EG2N
EG2P
EB0N
EB0P
EB1N
EB1P
EB2N
EB2P
ECLKP
ECLKN
ESTH
OSTH
STB
POL
STV
CKV
OE
GVON
GVOFF
XAO
VGH
VGL
VAA
VCM
V33P
GMA[1..14]
VCM
V33P
V18C
V33C
ViewSonic Corporation Confidential
56
-
Do Not Copy VA912/b-3
ViewSonic Corporation
Model
Title
Date Rev:
TOP
Page 60
GND_POWER
V5A1
V5A1
V5A
1
TP
VAA1
VAA1
VAA
1
TP
VGH1
VGH1
VGH
1
TP
VGL1
VGL1
VGL
1
TP
D34
D34
2
1
QP18
QP18
3
CP25
CP25
2
1
RP15
RP15
RP19
RP19
3
QP17
QP17
1
2
CP1
CP1
GND_POWER
CP28
CP28
RP31
RP31
RP16
RP16
CP2
RP20
RP20
GND_POWER
RP12
RP12
VAA
CP2
V5
FP1
FP1
2
V5
1
V5A
2
CP4
CP4
1
CP17
CP17
+
+
CP36
CP36
3
RP14
D3
D3
CP15
CP3
CP3
3
LP3
LP3
CP15
1
3
D2
D2
2
RP14
1
ZDP6
ZDP6
CP6
CP11
CP11
GND_POWER
2
CP6
VGL
CP9
CP9
V5A
VAA
VGH
VGL
DCDC_ON/OFF
GND_POWER
RP7
RP7
DCDC_ON/OFF
(High --> Enable)
GND_POWER
CP37
CP37
3
2
1
4
UP2
UP2
CE
SCP
VCC
OUT
GND
OSC
IN-
FB
5
6
8
7
1
GND_POWER
1
GND_POWER
CP38
CP38
DP1
DP1
1
2
CP16
CP16
CP13
CP13
3
QP2
QP2
2
GND_POWER
2
V5A
QP13
QP13
3
RP49
RP48
1
RP48
RP8
RP8
RP49
GND_POWER
CP14
CP14
VAA
[INV_GND]
LP4
LP4
LP5
LP5
LP6
LP6
GND_POWER
V5A
CP10
CP10
GND_POWER
CP18
1
4
3
BR/CTL
OUT
6
5
GND_POWER
RP50
RP50
CP18
GND_POWER
1
2
UP1
UP1
IN-
SCP
VCC
OSC
FB
GND
7
8
RP6
RP6
CP21
CP21
RP37
RP37
GND_POWER
CP19
CP19
CP20
CP20
RP32
RP32
2
3
QP4
QP4
2
RR1
RR1
GND_POWER
RP11
RP11
RP3
RP3
RP1
RP1
CP39
CP39
RP52
RP52
CP40
RP51
RP51
CP40
GND_POWER
ViewSonic Corporation Confidential
57
RP53
RP53
RP54
RP54
GND_POWER
-
Do Not Copy VA912/b-3
ViewSonic Corporation
Model
Title
Date Rev:
DC/DC
Page 61
CON1
CON1
RGB GND
HSYNC
VSYNC
SYNC GND
DDC SCL
DDC SDA
1/3shield
2/4shield
0/5shield
clk shield
DAT0+
DAT0-
DAT1+
DAT1-
DAT2+
DAT2-
DAT3+
DAT3-
DAT4+
DAT4-
DAT5+
DAT5-
+5V
HPD
clk+
clk-
25
R
26
G
27
B
29
28
8
15
6
7
14
16
11
3
19
22
18
17
10
9
2
1
13
12
5
4
21
20
23
24
GND_POWER
V5A_ESD
R5
R5
R6
R6
V5A
R7
R7
2
D4
D4
1
D9
D9
3
3
1
D5
D5
2
1
R13
R13
D10
D10
1
2
D8
D8
U2
U2
1
R14
R14
D11
D11
3
1
NC
2
NC
3
NC
4
GND
GND_POWER
R15
R15
3
1
D12
D12
1
1
VCC
VCLK
SCL
SDA
D13
D13
3
2
D7
D7
3
8
7
6
5
R16
R16
1
R11
R11
V5A
R12
R12
GND_POWER
R17
R17
R18
R18
D15
D14
D14
3
D15
3
1
R19
R19
V5A_ESD
C163
C163
1
D16
D16
3
R9
R9
R20
R20
R10
R10
R+
R-
G+
G-
B+
B-
CLK+
CLK-
1
C31
V5A
R213
R213
V5A_ESD
C31
2
D17
D17
C39
C39
GND_POWER
ViewSonic Corporation Confidential
58
C32
C32
2
-
Do Not Copy VA912/b-3
C33
C33
2
GND_POWER
C36
C34
C34
2
C35
C35
2
C36
2
C37
C37
2
C38
C38
2
ViewSonic Corporation
Model
Title
Date Rev:
DVI INTERFACE
Page 62
CN2
CN2
1
2
3
4
V5
5
6
7
GND_INV
R198
R198
V33C
8
R199
R199
3
Q19
C162
C162
Q19
R200
R200
1
INV_ON/OFF
2
GND_POWER
R195
R195
C30
C30
R196
R196
3
Q18
Q18
1
2
GND_POWER
R197
R197
V33C
V33C
INV_ADJ
ViewSonic Corporation
Model
INVERTER I/F
ViewSonic Corporation Confidential
59
-
Do Not Copy VA912/b-3
Title
Date Rev:
Page 63
1
GND_POWER
D18
D18
R25
R25
DDC_CLK
DDC_DAT
VCM_PWM
INT
VCPU
R218
R29
R29
GND_POWER
R218
R219
R219
LED
C44
C44
GND_POWER
VCPU
DDC_DAT
DDC_CLK
R23
R23
V5A
R32
R32
R36
R36
GND_POWER
MENU
KEY_DOWN
KEY_UP
SOURCE_SELECT
AUTO_ADJ
PWR_SW
LED_GR
LED_OR
CN8
CN8
1
2
3
4
R22
R22
R140
R139
AD0
AD1
AD2
AD3
V5A
1
R33
R33
R37
R37
Q7
Q7
R139
GND_POWER
3
2
03/08/04
C40
2
C41
1
GND_POWER
R26
R26
R27
R27
SDA1
SCL1
C41
C42
C42
Y2
Y2
C45
C45
C47
C47
C46
C46
V5A
R35
R35
Avoid entering the
self-test mode of the
MCU.
GND_POWER
R24
R24
LED
11
12
7
29
28
19
13
14
36
37
15
43
44
35
39
38
5
6
MTV312M
AUDIO_ON
V5A
R45
R45
R49
R49
U3
U3
X2
X1
RST
HSCL/P3.0/RX
HSDA/P3.1/TX
P3.2/INT0
ISDA/P3.4/T0
ISCL/P3.5/T1
VBLANK/P4.0
HBLANK/P4.1
STOUT/P4.2
HSYNC
VSYNC
DA7/HCLAMP
HLFHO/DA8
HALFV/DA9
NC
NC
R193
R193
R43
R43
V5A
1
Q6
Q6
4
8
VDD
AD2/P6.2/HLFHI
VSS
10
GND_POWER
OPTION1
OPTION2
INV_ON/OFF
XAO
3
2
GND_POWER
VDD3
DA0/P5.0
DA1/P5.1
DA2/P5.2
DA3/P5.3
DA4/P5.4
DA5/P5.5
DA6/P5.6
AD0/P6.0
AD1/P6.1
AD3/P6.3
DA10/P6.4
DA11/P6.5
DA12/P6.6
DA13/P6.7
17
P1.0
18
P1.1
20
P1.2
21
P1.3
22
P1.4
23
P1.5
24
P1.6
25
P1.7
3
2
1
42
41
40
34
27
26
16
9
30
31
32
33
DCDC_ON/OFF
C49
C49
ZDP7
ZDP7
C43
C43
2
C40
GND_POWER
5V_ON/OFF
V5A
R51
R51
R50
R50
R52
R52
R140
C50
C50
GND_POWER
R28
R28
PANEL_ON/OFF
(PANEL POWER CONTROL)
C171
C171
SCL1
GND_POWER
V5A
SDA1
R44
R44
R46
R46
C172
C172
R47
R47
R48
R48
VCPU
2
SDA
SCL
CSZ
HWRESET
D19
D19
1
2
Q3
Q3
3
U4
U4
8
7
WP
6
SCL
5
SDA
3
Q1
Q1
1
R31
R31
3
Q2
Q2
1
2
GND_POWER
2
1
R42
R42
GND_POWER
A0
VCC
A1
A2
GND
R34
R34
VGA_5V
R30
R30
5V_ON/OFF
V5A
L8
L8
10/20
V5A
1
2
3
4
C48
C48
GND_POWER
ViewSonic Corporation Confidential
60
-
Do Not Copy VA912/b-3
GND_POWER
ViewSonic Corporation
Model
Title
Date Rev:
MCU
Page 64
LED_OR
Q14
Q14
V5A
V5A
5
6
7
8
R53
R53
R54
R54
3
4
2
1
CN3
CN3
RP46
RP46
7
8
6
5
RP47
RP47
1
4
3
2
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
V5A
R179
R179
MENU
KEY_DOWN
KEY_UP
SOURCE_SELECT
AUTO_ADJ
PWR_SW
AUDIO_ON
VOL1
OPTION1
OPTION2
Q15
Q15
2
1
LED_G
LED_O
LP11
LP11
LP9
LP9
LP10
LP10
5
6
7
8
5
6
7
8
5
6
7
8
4
3
2
1
4
3
2
1
4
3
2
1
CP33
CP33
1
2
3
4
1
2
4
3
CP34
CP34
AUD_R
8
7
6
8
7
6
5
5
AUD_L
3
R181
1
3
R181
LED_O
2
GND_POWER
LED_GR
Q16
Q16
V5A
R182
R182
Q17
Q17
2
1
3
R184
1
3
2
R184
LED_G
J1
J1
L20
L20
L23
L23
AUD_G1
AUD_G1
L21
L21
L22
L22
1
GND_AUD
C167
C167
L24
L24
C168
C168
GND_AUD
C169
C169
GND_AUD
R214
R214
C170
C170
R215
R215
R216
R216
R217
R217
AUD_L
AUD_R1
AUD_R1
1
1
AUD_L1
AUD_L1
AUD_R
ViewSonic Corporation
Model
OSD INTERFACE
Title
Date Rev:
ViewSonic Corporation Confidential
61
-
Do Not Copy VA912/b-3
Page 65
V33P
VCM
VGH
VGL
VAA
VAA
VGH
VGL
VCM
V33B
L9
L9
L10
L10
L11
L11
C53
C53
L12
L12
C55
C55
L13
L13
C57
C57
L14
L14
C62
C62
U5
U5
4
NC
5
CD
VSS
VDD
OUT
3
GND_POWER
2
V33B
R60
R60
1
1
C51
C51
C52
C52
GND_POWER
GND_POWER
C58
C58
C63
C63
2
XAO
XAO
VSD
GND_POWER
VGD
GND_POWER
VGH_P
C54
C54
PANEL_VGL
C56
C56
C59
C59
GND_POWER
VGH_P
VGD
C61
C61
GND_POWER
GVON
GVOFF
VCOM
GVON
GVOFF
C60
C60
VSA
C64
C64
(3-STEP)
R55
R55
R57
R57
GND_POWER
R59
R59
GND_POWER
R58
R58
4
5
6
A_D
B_G
A_S
A_G
1
3
2
2
1
GND_POWER
Q9
Q9
B_S
B_D
XAO
OE
Q8
Q8
3
R56
R56
2
ZD1
ZD1
PANEL_VGH
1
CKV
STV
OSTH
OB2P
OB2N
OB1P
OB1N
OB0P
OB0N
OCLKN
OCLKP
OG2N
OG1P
OG1N
OG0P
OG0N
OR1P
OR1N
OR0P
OR0N
ESTH
EB2N
EB1P
EB1N
EB0P
EB0N
ECLKN
ECLKP
GMA1
GMA2
GMA3
GMA4
GMA5
GMA6
GMA7
GMA8
GMA9
GMA10
GMA11
GMA12
GMA13
GMA14
EG2N
EG1P
EG1N
EG0P
EG0N
ER2P
ER2N
ER1N
ER0P
OG2P
OR2P
OR2N
EB2P
EG2P
ER1P
ER0N
POL
STB
XAO
OE
CKV
STV
VGD
PANEL_VGL
PANEL_VGH
VCOM
OSTH
OB2P
OB2N
OB1P
OB1N
OB0P
OB0N
POL
STB
OCLKN
OCLKP
OG2P
OG2N
OG1P
OG1N
OG0P
OG0N
OR2P
OR2N
OR1P
OR1N
OR0P
OR0N
GND_POWER
VSD
VCOM
ESTH
EB2P
EB2N
EB1P
EB1N
EB0P
EB0N
ECLKN
ECLKP
GMA1
GMA2
GMA3
GMA4
GMA5
GMA6
GMA7
VSA
GMA8
GMA9
GMA10
GMA11
GMA12
GMA13
GMA14
EG2P
EG2N
EG1P
EG1N
EG0P
EG0N
ER2P
ER2N
ER1P
ER1N
ER0P
ER0N
GND_POWER
CN4
CN4
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
41
42
42
43
43
44
44
45
45
CN5
CN5
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
41
42
42
43
43
44
44
45
45
VSD
VSA
VCOM
VGD
PANEL_VGH
PANEL_VGL
STB
POL
ESTH
OSTH
STV
CKV
OE
GVON
GVOFF
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
VSD1
VSD1
VSA1
VSA1
VCOM1
VCOM1
VGD1
VGD1
P_VGH1
P_VGH1
P_VGL1
P_VGL1
STB1
STB1
POL1
POL1
ESTH1
ESTH1
OSTH1
OSTH1
STV1
STV1
CKV1
CKV1
OE1
OE1
GVON1
GVON1
GVOFF1
GVOFF1
ViewSonic Corporation Confidential
62
-
Do Not Copy VA912/b-3
ViewSonic Corporation
Model
Title
Date Rev:
PANEL I/F
Page 66
R75
R75
R80
R80
GND_POWER
VPREF
VPREF1
VPREF1
VPREF
1
R61
R61
R64
R64
VS1
R65
R65
R66
R66
VS2
R67
R67
R70
R70
VS3
R71
R71
R72
R72
VS4
R73
R73
R74
R74
VS5
R201
R201
R202
R202
VS6
R203
R203
R204
R204
VS7
R76
R76
R79
R79
R81
R81
R82
R82
VS8
R83
R83
R86
R86
VS9
R87
R87
R88
R88
VS10
R89
R89
R90
R90
VS11
R91
R91
R92
R92
VS12
R93
R93
R205
R205
VS13
R206
R206
R207
R207
VS14
R208
R208
GND_POWER
GMA1
GMA1
1
GMA1
GMA1
GMA2
GMA2
1
GMA2
GMA2
GMA3
GMA3
1
GMA3
GMA3
GMA4
GMA4
1
GMA4
GMA4
GMA5
GMA5
1
GMA5
GMA5
GMA6
GMA6
1
GMA6
GMA6
GMA7
GMA7
1
GMA7
GMA7
VCN
1
VCN1
VCN1
GMA8
GMA8
1
GMA8
GMA8
GMA9
GMA9
1
GMA9
GMA9
GMA10
GMA10
1
GMA10
GMA10
GMA11
GMA11
1
GMA11
GMA11
GMA12
GMA12
1
GMA12
GMA12
GMA13
GMA13
1
GMA13
GMA13
GMA14
GMA14
1
GMA14
GMA14
PANEL_ON/OFF
V5A
U6
L15
V5A
L15
C70
C70
L16
L16
C78
C78
PP11
PP11
L17
L17
D20
D20
1
2
V33A
R97
R97
R98
R98
C106
C106
U6
3
1
Vin
Vout
GND
2
C71
C71
GND_POWER
U8
U8
2
3
VOUT
VIN
4
VOUT
GND
1
C79
C79
GND_POWER
PP12
PP12
D21
D21
2
1
C91
C91
R96
R96
3
QP19
QP19
1
2
3
C92
C92
C100
C100
C105
C105
GND_POWER
C72
C72
C80
C80
U10
U10
VIN
GND
1
GND_POWER
2
1
VOUT
VOUT
V33A1
V33A1
TP
1
V33C1
V33C1
1
2
4
Q10
3
Q10
V33A
(PANEL VCC)
V33A
C73
C73
TP
V33C
C81
C81
C93
C93
C103
C103
V33C
(SCALER VCC)
V18V1
V18V1
TP
1
C94
C94
(Panel VCC)
C104
C104
V18C
V18C
(SCALER Core VCC)
V33P
VOP1
VOP1
L18
L18
VAA
VAA
1
C110
C110
GND_POWER
U13
U13
2
3
VOUT
VIN
VOP
C111
C111
4
VOUT
GND
1
9.99V
VPREF
R104
R104
C112
C112
R108
R108
VCM_PWM
VCM_PWM
ViewSonic Corporation Confidential
63
U12
U14A
U14A
8
+
+
-
-
4
GND_POWER
U12
3
VIN
GND
1
1
V5A
R99
R99
R106
R106
3
Q11
Q11
1
2
GND_POWER
GND_POWER
-
Do Not Copy VA912/b-3
VOP
3
VSCM
2
C115
C115
VOUT
VOUT
2
4
VSCM_ADJ
VCM1
VCM1
1
C109
R101
R101
C109
R102
C108
C108
GND_POWER
R102
VCM
R103
R103
VCM
VPREF
R100
R100
R107
R107
GND_POWER
VSCN
C107
C107
VOP
U14B
U14B
8
5
+
+
7
6
-
-
4
GND_POWER
VSCN_OUT
GND_POWER
R105
R105
C113
C113
GND_POWER
VCN
C114
C114
GND_POWER
ViewSonic Corporation
Model
Title
Date Rev:
POWER
Page 67
VAD
VPLL
VDVI
VDPLL
VPO
VDD
R210
R210
R211
R211
1
INV_ADJ
VOL_ADJ1
VOL_ADJ1
RIN
GNDR
GIN
GNDG
SOG
BIN
GNDB
HSYNC
VSYNC
R+
R-
G+
G-
B+
B-
CLK+
CLK-
CSZ
SCL
SDA
HWRESET
INT
AD0
AD3
AD1
AD2
V5A
R209
R209
Q20
Q20
1
1
GND_POWER
R212
R212
GND_POWER
21
11
VDDP
AVSS_DVI
AVSS_DVI
48
42
84
VDDP
GNDP
10
VDDP
104
94
VDDP
VDDP
GNDP
GNDP
85
95
20
GND_POWER
114
126
18
87
97
VDDP
VDDP
VDDC
VDDC
DDC1_DAT/GPO7
DDC1_CLK/GPO8
GNDP
GNDP
GNDP
GNDP
19
127
115
105
V33C
117
VDDC
VDDC
CLKAP
CLKAN
CLKBP
CLKBN
GNDC
GNDC
86
RA1P
RA1N
RA2P
RA2N
RA3P
RA3N
GA1P
GA1N
GA2P
GA2N
GA3P
GA3N
BA1P
BA1N
BA2P
BA2N
BA3P
BA3N
RB1P
RB1N
RB2P
RB2N
RB3P
RB3N
GB1P
GB1N
GB2P
GB2N
GB3P
GB3N
BB1P
BB1N
BB2P
BB2N
BB3P
BB3N
ESP
OSP
GPO0
GPO1
GPO2
GPO3
GPO4
GNDC
96
NC
NC
NC
NC
NC
GNDC
116
106
107
108
109
110
111
112
113
98
99
100
101
102
103
88
89
90
91
92
93
118
119
16
17
22
23
24
25
7
8
9
12
13
14
15
122
123
124
125
128
1
4
5
120
121
75
76
83
82
81
80
79
28
29
V33C
OR2P
OR2N
OR1P
OR1N
OR0P
OR0N
OG2P
OG2N
OG1P
OG1N
OG0P
OG0N
OB2P
OB2N
OB1P
OB1N
OB0P
OB0N
OCLKP
OCLKN
ER2P
ER2N
ER1P
ER1N
ER0P
ER0N
EG2P
EG2N
EG1P
EG1N
EG0P
EG0N
EB2P
EB2N
EB1P
EB1N
EB0P
EB0N
ECLKP
ECLKN
ESTH
OSTH
GVON1
STB
STV
CKV
OE
POL1
GVOFF
L5
L5
VPO
C14
C14
OR2P
OR2N
OR1P
OR1N
OR0P
OR0N
OG2P
OG2N
OG1P
OG1N
OG0P
OG0N
OB2P
OB2N
OB1P
OB1N
OB0P
OB0N
OCLKP
OCLKN
ER2P
ER2N
ER1P
ER1N
ER0P
ER0N
EG2P
EG2N
EG1P
EG1N
EG0P
EG0N
EB2P
EB2N
EB1P
EB1N
EB0P
EB0N
ECLKP
ECLKN
ESTH
OSTH
STB
STV
CKV
OE
GVOFF
C15
C15
C16
C16
R185
R185
R186
R186
R187
R187
R188
R188
C17
C17
C18
C18
C19
C19
POL
GVON
GVON
POL
C21
C21
C20
C20
V33C
L1
L1
V33C
V33C
VAD
C3
GND_POWER
C7
C7
C13
C13
C3
C5
C5
C10
C8
C8
C10
C9
C9
C2
C2
C1
C1
GND_POWER
V33C
L2
L2
L3
L3
L4
L4
VPLL
VDVI
D1
D1
GND_POWER
VDPLL
C12
C12
GND_POWER
C4
C4
45
35
55
51
65
U1
U1
AVDD
RIN
GNDR
GIN
GNDG
SOG
BIN
GNDB
HSYNC
VSYNC
R+
R-
G+
G-
B+
B-
CLK+
R1
R1
VDVI
C22
C22
GND_POWER
GND_POWER
V5A
3
VOL1
VOL1
2
C165
C165
+
+
C164
C164
C166
C166
CLK-
C6
C6
C11
C11
CSZ
SCL
SDA
HWRESET
INT
AD0
AD3
AD1
AD2
Y1
Y1
C23
C23
C24
C24
R2
R2
R3
R3
V33C
V5A
VOL1
63
62
60
59
61
58
57
37
38
40
41
43
44
46
47
49
50
52
66
67
69
71
70
32
72
30
31
77
78
73
74
33
34
3
2
6
AVDD
RIN0
RIN0M
GIN0
GIN0M
SOGIN0
BIN0
BIN0M
HSYNC0
VSYNC0
R+
R-
G+
G-
B+
B-
CK+
CK-
REXT
REFP
REFM
ALE/CSZ
RDZ/SCL
WRZ/SDA
HWRESETZ
INT
AD0/GPO6
AD3/GPO5
AD1/EINV
AD2/OINV
PWM0
PWM1
XIN
XOUT
BYPASS
AVSS_LPLL
BUSTYPE
AVSS
56
AVDD_MPLL
AVSS
AVSS
64
68
R138
R138
AVDD_DVI
AVDD_DVI
AVSS_MPLL
AVSS_PLL
36
54
53
AVDD_PLL
AVSS_DVI
39
ViewSonic Corporation Confidential
64
V18C
L6
V18C
-
Do Not Copy VA912/b-3
L6
VDD
GND_POWER
C29
C29
C28
C28
C27
C25
C25
C27
C26
C26
ViewSonic Corporation
GND_POWER
Model
SCALER
Title
Date Rev:
Page 68
D22
D22
DDC_DAT
D23
D23
R109
R109
R110
11
12
13
14
15
CN7
CN7
1
6
2
7
3
8
4
9
5
10
GND_POWER
R122
R122
R111
R111
R113
R113
R115
R115
R116
R118
C120
C120
R118
C121
C121
R119
R119
R117
R117
3
1
D24
D24
1
3
1
D25
D25
3
D26
D26
C122
C122
R120
R120
R121
R121
R123
R123
R116
12/15/2003
R110
R112
R112
R114
R114
C123
C123
C124
C124
C125
C125
C119
C119
C116
C116
C117
C117
C118
C118
GNDR
GNDG
GNDB
RIN
GIN
BIN
SOG
GND_POWER
D28
D28
GND_POWER
V5A_ESD
HSYNC
VSYNC
C128
C128
GND_POWER
DDC_CLK
DDC_DAT
HSYNC1
HSYNC1
VSYNC1
VSYNC1
TP
TP
VGA_5V
1
HSYNC
1
VSYNC
VGA_5V
U15
U15
R133
R133
NC
NC
NC
GND
2
03/08/04
VCC
VCLK
SCL
SDA
C157
C157
VGA_5V
8
7
6
5
GND_POWER
R124
R124
1
3
VGA_5V
V5A
2
R136
R136
2
C158
C158
R127
R127
GND_POWER
D31
D31
R126
R126
GND_POWER
(0603/100)
V5A
R137
R137
2
Most of Customers Recommended.
R129
R129
GND_POWER
DDC_CLK
2
D32
D32
1
GND_POWER
VSI
CLK_DDC
DAT_DDC
2
D27
2
2
D29
D29
12/15/2003
1
1
GND_POWER
D27
L19
L19
C129
C129
1
03/08/04
2
1
R130
R130
R131
R131
2
1
D33
D33
D30
D30
1
2
3
4
GND_POWER
C159
C159
R125
R125
V5A_ESD
R128
R128
GND_POWER
R134
R134
R135
R135
C126
C126
GND_POWER
C127
C127
ViewSonic Corporation Confidential
65
GND_POWER
-
Do Not Copy VA912/b-3
ViewSonic Corporation
Model
Title
Date Rev:
VGA
Page 69
11. PCB Layout Diagrams
ViewSonic Corporation Confidential
66
-
Do Not Copy VA912/b-3
Page 70
* 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?
Unit Excellent Good Fair 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 Diagrams
10. Schematic Diagrams
11.PCB Layout Diagrams
B. Are you satisfied with this Service Manual?
Item Excellent Good 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 dada:
Name: Title:
Company:
Add:
Tel: Fax:
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
(marc.maupin@viewsonic.com)
ViewSonic Corporation Confidential-Do Not Copy VA912/b-3
67
Loading...