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
Opt quest 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 06/29/2006 Initial Release J. Chang
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TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 4
3. Front Panel Function Control Description 7
4. Circuit Description 14
5. Adjustment Procedure 18
6. Troubleshooting Flow Chart 40
7. Recommended Spare Parts List 43
8. Exploded Diagram and Exploded Parts List 53
9. Block Diagram 58
10. Schematic Diagrams 59
11. PCB Layout Diagrams 67
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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) Disconnect the power plug from AC outlet if the product is not used for a long period of
time.
(5) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display
off.
(6) Do not touch the LCD panel surface with sharp or hard objects.
(7) Do not place heavy objects on the LCD display, video cable, or power cord.
(8) Do not use abrasive cleaners, waxes or solvents for your cleaning.
(9) Do not operate the product under the following conditions:
- Extremely hot, cold or humid environment.
- Areas susceptible to excessive dust and dirt.
- Near any appliance generating a strong magnetic field.
- Place 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. Power Supply Requirements
The external AC power operating range shall be from 90 to 264Vac
5. LCD Module Handling Precautions
5.1. Handling Precautions
(1) Since front polarizer is easily damaged, pay attention not to scratch it.
(2) Be sure to turn off power supply when inserting or disconnecting from input connector.
(3) Wipe off water drop 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 insure human
earth when handling.
(7) Do not open nor modify the Module Assembly.
(8) Do not press the reflector sheet at the back of the module to any directions.
(9) In case if a Module has to be put back into the packing container slot after once it was
taken out from 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 nor
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 nor bend the TFT Module even momentary. At designing the
enclosure, it should be taken into consideration that no bending/twisting forces are
applied to the TFT Module from outside. Otherwise the TFT Module may be damaged.
(12) Cold cathode fluorescent lamp in LCD contains a small amount of mercury. Please
follow local ordinances or regulations for disposal.
(13) Small amount of materials having no flammability grade is used in the LCD module.
1
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The LCD module should be supplied by power complied with requirements of Limited
Power Source (IEC60950 or UL1950), or be applied exemption.
(14) The LCD module is designed so that the CFL in it is supplied by Limited Current
Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit.
5.2. Handling and Placing Methods
Correct Methods: Incorrect Methods:
Only touch the metal frame of the LCD panel
or the front cover of the monitor. Do not touch
the surface of the polarizer.
Surface of the LCD panel is pressed by fingers
and that may cause “Mura”
the monitor with cushions Taking out the monitor by grasping the LCD
panel. That may cause “Mura”
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Place the monitor on a clean and soft foam pad. Placing the monitor on foreign objects. That
could scratch the surface of the panel or cause
“Mura”
The panel is placed facedown on the lap. That
may cause “Mura”
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2. Specification
1. General Requirements
General Specifications
Test Resolution & Frequency “1280 x 1024” @ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls Factory Default:
Contrast = 70%, Brightness = 100%
2. Signal Interface
Video Interface
Analog Input Connector DB-15 (Analog)
Default Input Connector Defaults to the first detected input
Video Cable Connector DB-15 Pin out Compliant DDC 1/2B.
Video Signals 1. Video RGB (Analog) Separate Sync
Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)
Exclusions Not compatible with interlaced video.
3. Power
Power Supply
Input Voltage Range 90 to 264 VAC
Power Dissipation 40 Watts (Typ.)
Maximum Mode Change Blank Time for image
stability. Note:
1) Excluding “Auto Adjust” time
2) Under DOS mode (640 x 350, 720 x 400 & 640 x
400), there is no “Auto Adjust” feature.
3) The monitor needs to do “Auto Adjust” the first
time a new mode is detected.
5. LCD Panel
Panel Characteristics
Souce1:
Panel Type HSD190ME13-A02
Type TN type with LVDS interface
Active Size 376.32 (H) x 301.056 (V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.294 mm
# of Backlights 4 CCFL edge-light (2 top / 2 bottom)
Backlight Life 40,000 Hours (minimum)
Panel Performance
Luminance –
Condition:
CT = 6500K, Contrast = Max,
Brightness = Max
Brightness Uniformity ≥80% Entire Area(Typ)
Contrast Ratio 600:1 (typ.), 450:1 (minimum)
Color Depth 16.2M colors (6-bits+2 bits FRC)
Viewing Angle (Horizontal) 140 degrees @ CR>10
Viewing Angle (Vertical) 130 degrees @ CR>10
Response Time
10%-90% @ Ta=25°C
Source2:
Panel Type HSD190ME13-A16
Type TN type with LVDS interface
Active Size 376.32 (H) x 301.056 (V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.294 mm
# of Backlights 4 CCFL edge-light (2 top / 2 bottom)
Backlight Life 40,000 Hours (minimum)
Panel Performance
Luminance –
Condition:
CT = 6500K, Contrast = Max,
Brightness = Max
Brightness Uniformity ≥80% Entire Area(Typ)
Contrast Ratio 700:1 (typ.), 450:1 (minimum)
Color Depth 16.2million colors (6 bits+2bits data)
Viewing Angle (Horizontal) 150 degrees @ CR>10
Viewing Angle (Vertical) 135 degrees @ CR>10
Response Time
10%-90% @ Ta=25°C
Under 5 seconds (Maximum)
1 seconds (Typ.) for recognized timings
1-2 seconds (Typ.) for unrecognized timing
250 cd/m2 (typ. after 30-minute warm-up)
8ms(Typ.)
300 cd/m2 (typ. after 30-minute warm-up)
8ms (Typ.)
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6. Mechanical
Dimensions
Width 414 mm
Height 407 mm
Depth 219 mm
Monitor Weight 5.4kg / 11.88 lbs
Ergonomics
Tilt Up 20 DEGREES MINIMUM
Tilt Down -5 degrees
Package Specifications
Width 490 mm
Height 570 mm
Depth 145 mm
Gross Weight 6.8kg (14.96lb)
7. Environmental
Environmental Conditions
Operating Temperature 0°C to +40°C
Storage Temperature -20°C to +60°C
Operating Relative Humidity 10% to 90% RH Non-Condensing
Storage Relative Humidity 5% to 90% RH Non-Condensing
Operating Altitude 0 to +3,000 meters
Storage Altitude 0 to +12,000 meters
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3. Front Panel Function Control Description
Main Menu
With OnView controls
Front Control Panel
shown below in detail
Displays the control
screen for the highlighted
control.
Also toggles between two
controls on some
screens.
Also a shortcut to Auto
Image Adjust.
Displays the Main Menu
or exits the control screen
and saves adjustments.
Power light
Green = ON
Orange = Power Saving
Power
On/Off
Scrolls through menu options and
adjusts the displayed control.
Also a shortcut to display the
Contrast adjustment control
screen.
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Do the following to adjust the screen image:
1
To display the Main Menu, press button [1].
Main Menu
AUTO
SET
1:EXIT 2:SELECT
Auto Adjust
Contrast/Brightness
Color Adjust
Information
i
Image Adjust
Setup Menu
?
Memory Recall
NOTE: All OnView menus and adjustment screens disappear automatically
after about 15 seconds. This time period is adjustable through the Setup
menu and the OSD timeout control described on page 11.
2
To highlight a control you want to adjust, press I or J to scroll up or down
the Main Menu.
3
To select the highlighted control, press button [2]. A control screen appears
like the example shown below.
Contrast
1:EXIT 2: Brightness
4
To adjust the control, press the upIor downJbuttons.
5
To save the adjustments and exit the menu, press button [1] twice.
The line at the
bottom of the
screen tells you
what you can do
next: Exit or Select
the control that is
highlighted.
The following tips may help you optimize your display:
•Adjust your computer's graphic card so that it outputs a video signal 1280 x
1024 @ 60 Hz to the LCD dislay. (Look for instructions on “changing the
refresh rate” in your graphic 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 dislay.)
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Main Menu Controls
Adjust the menu items shown below by using the up Iand down Jbuttons.
ControlExplanation
Auto Adjust
automatically sizes, centers, and fine tunes the
video signal to eliminate waviness and distortion.
Press the [2] button to obtain a sharper image.
NOTE
: Auto Adjust works with most common video cards. If
this function does not work on your LCD dislay, then lower the
video refresh rate to 60 Hz and set the resolution to its pre-set
value.
Contrast
adjusts the difference between the image background
(black level) and the foreground (white level).
Brightness
Color Adjust
adjusts background black level of the screen image.
provides several color options: preset color
temperatures and User which allows you to adjust red (R), green
(G), and blue (B). The factory setting for this product is 6500K
(6500 Kelvin).
sRGB
— sRGB is quickly becoming the industry standard for color
management, with support being included in many of the latest
applications. Enabling this setting allows the LCD display to
more accurately display colors the way they were originally
intended. Enabling the sRGB setting will cause the Contrast and
Brightness adjustments to be disabled.
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. Default setting.
5400K — Adds green to the screen image for a darker color.
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ControlExplanation
User
— Individual adjustments for red, green, and blue.
1
To select color (R, G or B) press button [2].
2
To adjust selected color, press I or J.
3
When you are finished making all color adjustments, press
button [1] twice.
i
Information
coming from the graphics card in your computer. See your
displays the timing mode (video signal input)
graphic card’s user guide for instructions on changing the
resolution and refresh rate (vertical frequency).
VESA 1280 x 1024 @ 60 Hz (recommended) means that the
resolution is 1280 x 1024 and the refresh rate is 60 Hertz.
Image Adjust
Image Adjust
H./V. Position
H. Size
Fine Tune
Sharpness
1:EXIT 2:SELECT
The Image Adjust controls are explained below:
H./V. Position
adjusts horizontal and vertical position of the
screen image. You can toggle between Horizontal and Vertical
by pressing button [2]. Horizontal moves the screen image to
the left or to the right. Vertical moves the screen image up and
down.
H. Size
NOTE:
(Horizontal Size) adjusts the width of the screen image.
Vertical size is automatic with your LCD dislay.
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Control
Explanation
Fine Tune sharpens focus by aligning the illuminated text and/
or graphic characters.
NOTE: Try the Auto Adjust (see page 9) before using the Fine
Tune control.
?
Sharpness
Setup Menu displays the menu shown below.
adjusts the clarity and focus of the screen image.
The Setup Menu controls are explained below.
Language
Select allows you to choose the language used in
the menus and control screens.
OSD
Resolution Notice
OSD Position
advises the optimal resolution to use.
allows you to move the on-screen display menus
and control screens.
OSD Timeout
sets the length of time an on-screen display
screen is displayed. For example, with a “15 second” setting, if
a control is not pushed within 15 seconds, the display screen
disappears.
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ControlExplanation
OSD
OSD Background
allows you to turn the On-Screen display
background on or off. This means that while making adjustments
from the OSD control screens you can also view open software
applications, or the Windows desktop.
Memory Recall
settings if the display is operating in a factory Preset Timing
Mode listed in this user guide.
returns adjustments to the original factory
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Short Cut Key
Function Key : 5 Keys !!!! 1 2 ▼
▼▼▼
[1] Main Menu
[2] Auto Image Adjust
[▼▼▼▼] or [▲▲▲▲]
to immediately activate Contrast menu.
It should be change to Brightness OSD
by push button [2].
[▼▼▼▼] + [▲▲▲▲]
recall Contrast or Brightness while in
the Contrast or Brightness adjustment,
or recall both of Contrast and
Brightness when the OSD is not open.
[1] + [2] toggle 720x400 and 640x400 mode when
input 720x400 or 640x400 mode.
[1] + [▼▼▼▼] + [▲▲▲▲]
(Keep pushing 5 sec)
[1] + [▼▼▼▼]
[1] + [▲▲▲▲]
White Balance.
Power Lock
OSD Lock
▲▲▲▲
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4. Circuit Description
A.
Scaling controller
GENERAL DESCRIPTION
The TSU16AS is total solution graphics processing IC for LCD monitors with panel
resolutions up to SXGA. It is configured with a high-speed integrated triple-ADC/PLL, a high
quality display processing engine, and an integrated output display interface that can support
LVDS panel interface format. To further reduce system costs, the TSU16AS also integrates
intelligent power management control capability for green-mode requirements and
spread-spectrum support for EMI management.
The TSU16AS incorporates the world’s first coherent overs ampled RGB graphics ADC in a
monitor controller system1. The overs ampling ADC samples the input RGB signals at a
frequency that is much higher than the signal source pixel rate. This can preserve details in the
video signal that ordinarily would be lost due to input signal jitter or bandwidth limitations in
non-overs ampled systems.
The TSU16AS also incorporates a new Dynamic Frame Rate (DFR) generator2 for the digital
output video to the display panel that preserves the advantages of a fixed output clock rate,
while eliminating the output end of frame short-line.
1,2 Patent Pending
PIN DESCRIPTION
CPU Interface
Pin Name Pin Type Function Pin
HWRESET Schmitt Trigger Input w/
5V-tolerant
Hardware reset; active high 5
INT Output CPU interrupt; 4mA driving strength 27
AD3 I/O w/ 5V-tolerant DDR direct bus AD3; 4mA driving strength 4
AD2 I/O w/ 5V-tolerant DDR direct bus AD2; 4mA driving strength 1
AD1 I/O w/ 5V-tolerant DDR direct bus AD1; 4mA driving strength 2
AD0 I/O w/ 5V-tolerant DDR direct bus AD0; 4mA driving strength 3
ALE I w/ 5V-tolerant DDR direct bus ALE; active high 24
WRZ I w/ 5V-tolerant DDR direct bus WRZ; active low 25
RDZ I w/ 5V-tolerant DDR direct bus RDZ; active low 26
Analog Interface
Pin Name Pin Type Function Pin
HSYNC Schmitt Trigger Input w/
5V-tolerant
Analog HSYNC input 8
VSYNC Schmitt Trigger Input w/
5V-tolerant
Analog VSYNC input 9
REFP Internal ADC top de-coupling pin 22
REFM Internal ADC bottom de-coupling pin 23
RINP Analog Input Analog red input 19
RINM Analog Input Reference ground for analog red input 18
SOGIN Analog Input Sync-on-green input 17
GINP Analog Input Analog green input 16
GINM Analog Input Reference ground for analog green input 15
BINP Analog Input Analog blue input 14
BINM Analog Input Reference ground for analog blue input 13
REXT External resistor 390 ohm to AVDD_ADC 11
LVDS Interface
Pin Name Pin Type Function Pin
LVA0M Output A-Link Negative LVDS Differential Data Output 42
LVA0P Output A-Link Positive LVDS Differential Data Output 41
LVA1M Output A-Link Negative LVDS Differential Data Output 40
TSU16AS
SXGA LCD Controller with Analog Interface and Dual LVDS Transmitter
Preliminary Data Sheet Version 0.2
Version 0.2 - 5 - 10/1/2004
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Copyright c 2004 MStar Semiconductor, Inc. All rights reserved.
Pin Name Pin Type Function Pin
LVA1P Output A-Link Positive LVDS Differential Data Output 39
LVA2M Output A-Link Negative LVDS Differential Data Output 38
LVA2P Output A-Link Positive LVDS Differential Data Output 37
LVA3M Output A-Link Negative LVDS Differential Data Output 34
LVA3P Output A-Link Positive LVDS Differential Data Output 33
LVACKM Output A-Link Negative LVDS Differential Clock Output 36
LVACKP Output A-Link Positive LVDS Differential Clock Output 35
LVB0M Output B-Link Negative LVDS Differential Data Output 52
LVB0P Output B-Link Positive LVDS Differential Data Output 51
LVB1M Output B-Link Negative LVDS Differential Data Output 50
LVB1P Output B-Link Positive LVDS Differential Data Output 49
LVB2M Output B-Link Negative LVDS Differential Data Output 48
LVB2P Output B-Link Positive LVDS Differential Data Output 47
LVB3M Output B-Link Negative LVDS Differential Data Output 44
LVB3P Output B-Link Positive LVDS Differential Data Output 43
LVBCKM Output B-Link Negative LVDS Differential Clock Output 46
LVBCKP Output B-Link Positive LVDS Differential Clock Output 45
GPO Interface
Pin Name Pin Type Function Pin
PWM1 Output PWM1; 4mA driving strength 29
PWM0 Output PWM0; 4mA driving strength 28
Misc. Interface
Pin Name Pin Type Function Pin
XIN Crystal Oscillator Input Xin 6
XOUT Crystal Oscillator Output Xout 7
VCTRL Output Regulator Control 54
Power Pins
Pin Name Pin Type Function Pin
AVDD_ADC 3.3V Power ADC Power 12, 20
VDDP 3.3V Power Digital Output Power 30, 53
DDC 1.8V Power Digital Core Power 32, 55
GND Ground Ground 10, 21, 31, 56
ELECTRICAL SPECIFICATIONS
Analog Interface Characteristics
Parameter Min Typ Max Unit
Resolution 8 Bits
DC ACCURACY
Differential Nonlinearity ±0.5 +1.50/-1.0 LSB
Integral Nonlinearity ±1 LSB
No Missing Codes Guaranteed
ANALOG INPUT
Input Voltage Range
Minimum 0.5 V p-p
Maximum 1.0 V p-p
Input Bias Current 1 uA
Input Full-Scale Matching 1.5 %FS
Brightness Level Adjustment 62 %FS
SWITCHING PERFORMANCE
Maximum Conversion Rate 220 MSPS
Minimum Conversion Rate 12 MSPS
HSYNC Input Frequency 15 200 kHz
PLL Clock Rate 12 220 MHz
PLL Jitter 500 ps p-p
Sampling Phase Tempco TBD ps/C
DIGITAL INPUTS
Input Voltage, High (VIH) 2.5 V
Input Voltage, Low (VIL) 0.8 V
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Input Current, High (IIH) -1.0 uA
Input Current, Low (IIL) 1.0 uA
Input Capacitance 5 pF
DIGITAL OUTPUTS
Output Voltage, High (VOH) VDDP-0.1 V
Output Voltage, Low (VOL) 0.1 V
DYNAMIC PERFORMANCE
Analog Bandwidth, Full Power 250 MHz
Channel to Channel Matching 0.5% Full-Scale
Specifications are subjected to change without notice.
TSU16AS
SXGA LCD Controller with Analog Interface and Dual LVDS Transmitter
Preliminary Data Sheet Version 0.2
Version 0.2 - 7 - 10/1/2004
Copyright c 2004 MStar Semiconductor, Inc. All rights reserved.
Absolute Maximum Ratings
Parameter Symbol Min Typ Max Units
3.3V Supply Voltages VVDD_33 -0.3 3.6 V
1.8V Supply Voltages VVDD_18 -0.3 1.98 V
Input Voltage (5V tolerant inputs) VIN5Vtol -0.3 5.0 V
Input Voltage (non 5V tolerant inputs) VIN -0.3 VVDD_33 V
Ambient Operating Temperature TA 0 70 °C
Storage Temperature TSTG -40 150 °C
Junction Temperature TJ 150 °C
Thermal Resistance (Junction to Air) Natural
Conversion
θJA TBD °C /W
Thermal Resistance (Junction to Case) Natural
Conversion
θJC TBD °C /W
Note: Stress above those listed under Absolute Maximum Rating may cause permanent
damage to those indicated in the stress rating only; functional operation of the device at
these or any other conditions outside of those indicated in the operation sections of this
specification is not implied. Exposure to absolute maximum ratings foextended periods
may affect device reliability.
ORDERING GUIDE
Model Temperature
Range
Package
Description
Package
Option
TSU16AS 0°C to +70°C SDIP
MTV512M64
The MTV512M micro-controller is an 8051 CPU core embedded device especially tailored for
flat panel display applications. It includes an 8051 CPU core,768-byte SRAM, 4 channels of
6-bit ADC, 3 external counters/timers, 6 channels of PWMDAC, VESA DDC interface, and a
64K-byte internal program Flash-ROM memory.
FEATURES
• 8051 core, CPU operating frequency up to 24MHz
• 3.3V power supply
• 768-byte RAM; 64K-byte program Flash memory
• Maximum 6 channels of PWM DAC
• Compliant with VESA DDC1/2B/2Bi/2B+/CI
standard
• Watchdog timer with programmable interval
• Support external counters/timers, T0, T1, and ET2
• Single/double frequency clock output
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• Two clock output ports
• Two external interrupts, INT1 is shared with Slave
IIC interrupt source
• Maximum 4 channels of 6-bit ADC
• Flash-ROM code protection selection
• Hardware ISP (In System Programming), no Boot
Code required
• Embedded Dual Ports DDCRAM (128-byte x 2)
• Green products like Pb-Free Packages or All Green Packages available
PIN CONFIGURATION & DESCRIPTION
A “CMOS output pin” means it can sink and drive at least 4mA current. It is not recommended
to use such pin as input function.
An “open drain pin” means it can sink at least 4mA current. It can be used as input or output
function and needs an external pull up resistor.
An “8051 standard pin” is a pseudo open drain pin. It can sink at least 4mA current when
output is at low level, and drives at least 4mA current for 160nS when output transits from low
to high, then keeps driving at 120 uA to maintain the pin at high level. It can be used as input
or output function. It needs an external pull up resistor when driving heavy load device.
There is an internal pull-up resistance on each CMOS PAD and an internal pull-down
resistance on each input
Low Power Reset (LVR) & Watchdog Timer
When the voltage level of power supply is below 2.4V (+/-0.4V) for a specific period of time,
the LVR generates a chip reset signal. After the power supply is above 2.4V (+/-0.4V)
INVERTER
In order to drive the CCFLs embedded in the panel module, there is a half bridge inverter to
convert by the controller.
The input 12V up to hundreds of AC voltage output.
The inverter is formed by symmetric in order to drive the separate lamp modules.
The input stage consists of a PWM controller, half bridge inverter, and switching MOSFET to
convert DC input into AC output.
The output stage consists of a tuning capacitor, coupling capacitor, transformer, push-pull
MOSFET pair to boost AC output up to hundreds of voltage.
And one resister is serial to lamp for output voltage feedback.
There are two signal to control the inverter which come from system.
Logic “high” level which send to I901 is turn on the inverter.
BRI signal control brightness by DC level which was integral from PWM signal.
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5. Adjustment Procedure
1. Function Test
1.1. Product
- 19” LCD Monitor
1.2. Test Equipment
- Color Video Signal & Pattern (or PC with SXGA resolution and a sound card)
1.3. Test Condition
Before function test and alignment, each LCD Monitor should be run-in and warmed up for
at least 30 minutes with the following conditions:
(a) In room temperature,
(b) With full-white screen, RGB, and Black
(c) With cycled display modes,
1 640 x 350 @ 70Hz, 31.5kHz
2 640 x 400 @ 60Hz, 31.5kHz
3 640 x 400 @ 70Hz, 31.5kHz
4 640 x 480 @ 50Hz, 24.7kHz
5 640 x 480 @ 60Hz, 31.5kHz
6 640 x 480 @ 67Hz, 35.0kHz
7 640 x 480 @ 72Hz, 37.9kHz
8 640 x 480 @ 75Hz, 37.5kHz
9 640 x 480 @ 85Hz, 43.27kHz
10 720 x 400 @ 70Hz, 31.5kHz
11 800 x 600 @ 56Hz, 35.1kHz
12 800 x 600 @ 60Hz, 37.9kHz
13 800 x 600 @ 75Hz, 46.9kHz
14 800 x 600 @ 72Hz, 48.1kHz
15 800 x 600 @ 85Hz, 53.7kHz
16 832 x 624 @ 75Hz, 49.7kHz
17 1024 x 768 @ 60Hz, 48.4kHz
18 1024 x 768 @ 70Hz, 56.5kHz
19 1024 x 768 @ 72Hz, 58.1kHz
20 1024 x 768 @ 75Hz, 60.0kHz
21 1024 x 768 @ 85Hz, 68.67kHz
22 1152 x 864 @ 75Hz, 67.5kHz
23 1152 x 870 @ 75Hz, 68.7kHz
24 1280 x 1024 @ 60Hz, 63.4kHz
25 1280 x 1024 @ 75Hz, 79.97kHz
26 1280x 720 @ 60Hz, 45kHz (HDTV)
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p
1.4.2 Function Test Display Pattern
Item Test Content Pattern Specification Remark
1 Frequency &
Tracking
2 Contrast/Brightness 16 Gray Scale 16 gray levels should be
3 Boundary Horizontal & Vertical
4 RGB Color
Performance
5 Screen Uniformity &
Flicker
6 Dead Pixel/Line White Screen & Dark
7 White Balance White & Black
Fine Line Moire Eliminate visual wavy
noise.
distinguishable.
Horizontal and Vertical
Thickness
RGB Color
Intensities
Full White Should be compliant with
Screen
Pattern
osition of video should be
adjustable to be within the
screen frame.
Contrast of each R, G, B,
color should be normal.
the spec.
The numbers of dead
pixels should be compliant
with the spec.
The screen must have the
pure white and black
pattern, no other color.
Figure 1
Figure 2
Figure 3
Figure 4,
5, 6
Figure 7
Figure 7,
8
Figure 9
Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2)
Horizontal & Vertical Thickness Pattern (Figure 3) R. Color Pattern (Figure 4)
19
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
Page 23
G. Color Pattern (Figure5) B. Color Pattern (Figure 6)
Full White Patter (Figure 7) Dark Screen Pattern (Figure 8)
Black-White Pattern (Figure 9)
1.5. Function Test and Alignment Procedure
1.5.1 All Modes Reset
You should do “All Mode Reset” (Refer to Chapter III-3. Hot Keys for Function
Controls) first. This action will allow you to erase all end-user’s settings and restore the
factory defaults.
1.5.2 Auto Image Adjust
Please select and enter “Auto Image Adjust” function on Main Menu to see if it is
workable. The “Auto Image Adjust” function is aimed to offer a better screen quality
by built-in ASIC. For optimum screen quality, the user has to adjust each function
manually.
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
20
Page 24
1.5.3 Firmware
Test Pattern: Burn In Mode (Refer to Chapter III-3. Hot Keys for Function Controls)
- Make sure the F/W is the latest version.
1.5.4 DDC
Test Pattern: EDID program
- Make sure it can pass test program.
1.5.5 Fine Tune and Sharpness
Test Signal: 1280*1024@60Hz
Test Pattern: Line Moire Pattern
- Check and see if the image has noise and focus performs well. Eliminate visual line
bar.
- If not, readjust by the following steps:
(a) Select and enter “Fine Tune” function on “Manual Image Adjust” to adjust the
image to eliminate visual wavy noise.
(b) Then, select and enter “Sharpness” function to adjust the clarity and focus of the
screen image.
1.5.6 Boundary
Test Signal: 1280*1024@60Hz
Test Pattern: Horizontal & Vertical Line Thickness Pattern
- Check and see if the image boundary is within the screen frame.
- If not, readjust by the following steps:
(a) Select and enter “Manual Image Adjust” function on OSD Main Menu.
(b) Then, select and enter “Horizontal Size” or “Horizontal/Vertical Position”
function to adjust the video boundary to be full scanned and within screen frame.
1.5.7 White Balance
A. TIMING: 1280x1024 64KHz/60Hz.
B. PATTERN: 5 Blocks.
C. LCD MONITOR set to 1280x1024 80K/75Hz BURN IN and warm up over 30
minutes.
D. CA110 color analizer at the center of screen and along a perpendicular to the
screen at 20cm from the display.
E. Power turn off, Press
power LED is on, release
factory mode. (Fig.1)
“▲” and “ ”
“▲” and “ ”
2
and turn on power at the same time after
key, Then press “ ” key go to
2
1
(Fig.1)
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
21
Page 25
F. Adjust Color Temperature:
(1) EEPROM INIT (5 BLOCKS):
Press “▼” key move cursor to EEPROM INIT, Press “ ” key then
monitor will INIT ADC value.
(2) Press “▲” key move cursor to “White Balance”, Press “ ” key do
white balance adjustment.
(3) Press “▼ ” key move cursor to “Color Temperature Adjust”, Press
“ ” key, Then OSD will display Fig.2
2
(4) 9300K verify: move cursor to 9300K Press “ ” key.
Press “▼”, “▲” key adjust R.G.B value
x=0.283 ± 0.02
y=0.298 ± 0.02
Press “ ”key return to Fig.2
Test Signal: 1280*1024@60Hz
Test Pattern: R, G, B, Color Intensities Pattern and 16 Gray Scale Pattern
- Check and see if each color is normal and distinguishable.
- If not, please return the unit to repair area.
1.5.9 Screen Uniformity and Flicker
Test Signal: 1280*1024@60Hz
Test Pattern: Full White Pattern
- Check and see if it is in normal condition.
2
2
11
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
22
Page 26
1.5.10 Dead Pixel and Line
Test Signal: 1280*1024@60Hz
Test Pattern: Dark and White Screen Pattern
- Check and see if there are dead pixels on LCD panel with shadow gauge and filter
film.
- The total numbers and distance of dead pixels should be compliant with the spec.
1.5.11 Mura
Test Pattern: White, RGB, Black, & Grey
Test Tool: 8% ND Filter
- Check if the Mura can pass 8% ND Filter.
1.5.13 Check for Secondary Display Modes
Test Signal:
Analog: 640*350@70Hz; 640*480@60HZ
720*400@70Hz; 800*600@60HZ/70HZ/75HZ
832*624@75Hz, 1024*768@60HZ/70HZ/75HZ
1280*1024@60/75Hz
- Normally when the primary mode 1280*1024@60Hz is well adjusted and compliant
with the specification, the secondary display modes will be great possible to be
compliant with the spec. But we still have to check with the general test pattern to
make sure every secondary is compliant with the specification.
1.5.14 All Modes Reset
After final QC step, we have to erase all saved changes again and restore the factory
defaults. You should do “All Mode Reset” again.
1.5.15 Power Off Monitor
Turn off the monitor by pressing “Power” button.
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Page 27
2. Firmware Upgrade Procedure
When you receive the returned monitor, please check whether the firmware version is the
latest. If not, please do the following procedures to upgrade it to the latest version.
2.1. Equipment Needed
- VA902/b-3 Monitor
- Fixture for Firmware Upgrade
- VGA Cable
- PC (Personal Computer)
- LPT Cable
- Firmware Upgrade Program
- One additional monitor for checking the program execution
Printer Por
t
PC
LPT Cable
VA902/b-3
VGA Cable
24
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Page 28
2.2. Setup Procedure
2.2.1 Connect P2 of Fixture with printer port of PC by LPT Cable.
2.2.2 Connect P1 of Fixture with VA902/b-3 Monitor by VGA Cable.
2.2.4 Connect Power Cord to VA902/b-3 Monitor.
2.2.5 Connect PC to the additional monitor.
2.3. ISP Download program procedure
2.3.1 Hardware Connect status:
2.3.2 Down load isp program
Step 1: Execute ISP.exe
25
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Page 29
Step 2: Select MCU type
Pressing the Comb box to select the type of the MCU, It need to be selected the
MTV512GM64 for this project. Then press the Create Security File Button to enter
step 3.
Step 3: Create Security File
Enter the three string into the blank like fig 2. Then press OK Button.
26
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
Page 30
Step 4: Load file
Press the Load MCU File button to select the file will be download. (*.hex)
Step 5: Run
Pressing the Run Button to start download program. Press OK button to Enter
ISP mode.
27
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
Page 31
Step 6: Download program finish
Pressing the OK Button to finish the download program procedure.
Trouble shooting:
If you find the status like the follow picture. Please check the following item.
a. The connecting status between PC and ISP board.
b. The connecting status between ISP status and Monitor.
Turn off the power of monitor (AC plug off ) and disconnect the D-Sub connector .
To connect the D-Sub connector and then turn on the power of monitor.(AC plug on)
If the test result shows “passed,” it means the connection is well. If not (failed), it means
the connection has problems.Then you need to check the setup procedure or reboot the PC,
or simply use another PC to do the firmware upgrade.
28
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Page 32
3. DDC Key In Procedure
Note:
1. Every time after replacing the main board, you have to do the DDC key in.
2. If you find the DDC does not conform to the monitor, you have to do the DDC key in.
3.1. Equipment Needed
- VA902/b-3 Monitor
- DDC Card
- PC
- RS232 cable
- Barcode Reader
- VGA Cable
VA902/b-3 DDC Card PC
RS-232 Cable VGA Cable Barcode Reader
29
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Page 33
3.2. Setup Procedure
3.2.1 Connect VGA Card and DDC Card with RS-232 cable.
3.2.2 Barcode Reader connect with keyboard and PC keyboard port.
3.2.3 Connect RS-232 Cable and VA902(3) with VGA Cable.
(when key in DVI DDC information, use VGA transform to DVI port )
3.2.4 Connect Power Cord to VA902(3) Monitor.
3.3. DDC Key In Procedure
3.3.1 Run DDC.exe
3.3.2 Choose model number and conform the Time then Press “ENTER” key.
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Page 34
3.3.3 When appear the PIC “ choose DDC Card”, Press ALT+2 Enter DDC 2B test
interface.
10
11Packing Material:
12
13
14GENERIC FOAM SETP-00001347308331
15GENERIC BOX 22 1/2 x 11 3/4 x 23 1/2P-00002515206531
16
17Plastics:STAND VE910 ABS 94HB BLACK 4001PL-000030062028259301P5B01 1
P - Model
ItemECR/ECNViewSonic P/NRef. P/NLocation Universal number# Q'ty
1Accessories:
Remark 1:
Above listed items are examples, supplier can expand the rows to add more necessary items.
Remark 2: All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by ViewSonic Corporation. This is to
eliminate repeated cross checks of each item between this version and prior versions.
Above listed items are examples, supplier can expand the rows to add more necessary items.
All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by ViewSonic Corporation. This is to
Remark 2:
eliminate repeated cross checks of each item between this version and prior versions.
1A-PC-0106-02772427130097P AC POWER CORD CHINA WALL 1.83M BLACKP9511
2DC-000034612002310402P GUARANT CARDVIEWSONIC WARRANTY CARD-C 20046P071
3M-LB-0813-08622056606025P SERIAL LABELVS CN WARRANTY CARD SN STICKER6P082
4M-LB-0813-08632056606010P SERIAL LABELVIEWSONIC BOX STICKER-G6P121
5M-LB-0813-08642056606009P SERIAL LABELVIEWSONIC SERVICE STICKER-G6P151
47
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
96E-C-0404-18552287247212P CAP CER Y2 4700p/250V Y5V P=10.0 M KC8031
97N/A2357510708P EC HI-RIPPLE 105C 400V EC 100u/400V 18*32 P=7.5 SC8051
98E-C-0404-22622285110291P CAP CER CC 1000P/1KV Y5P P=5.0 K TC8061
99E-C-0404-48332281110491P CAP CER CC 0.1u/50V (Y5P) P=5.0 K TC8071
100N/A2281118191P CAP CER CC 180p/50V (Y5P) P=5.0 K TC8081
101E-C-0404-18382333610691P CAP ELE 105'C EC 10u/ 50V 5*11 P=5.0 TC8091
102E-C-0404-18332333622691P CAP ELE 105'C EC 22u/ 50V 5*11 P=5.0 TC8101
103N/A2281168291P CAP CER CC 6800pF/50V K TC8121
104E-C-0404-18342333647591P CAP ELE 105'C EC 4.7u/ 50V 5*11 P=5.0 TC8151
105N/A2284122291P CAP CER CC 2200pF/1KV P=5.0 K TC8201
106N/A2284122291P CAP CER CC 2200pF/1KV P=5.0 K TC8211
107E-000032502330006601P CAP ELE SPECIAL (3000HR) EC 1500u/ 16V 13*16 P=5.0 CC8221
108N/A2330006491P CAP ELE SPECIAL (3000HR) EC 470u /16V 10*13 P=5.0 TC8231
109E-000032522330006501P CAP ELE SPECIAL EC 1000u/ 10V 8*20 P=3.5 CC8241
110N/A2330006491P CAP ELE SPECIAL (3000HR) EC 470u /16V 10*13 P=5.0 TC8251
111E-000035552302047291P CAP,MTL MEF 4700pF/50V P=5.0 J TC8261
112E-C-0404-18552287247212P CAP CER Y2 4700p/250V Y5V P=10.0 M KC8311
113E-C-0404-48332281110491P CAP CER CC 0.1u/50V (Y5P) P=5.0 K TC8321
114E-C-0404-48332281110491P CAP CER CC 0.1u/50V (Y5P) P=5.0 K TC8451
115E-000033112302010491P CAP,MTL MEF 0.1uF/50V P=5.0 J TC9011
116E-000044592275827001P CAP CER TC 27pF/3KV CH J P=7.5 CC9021
117E-000057302284022291P CAP CER CC 2200p/50V X7R P=5.0 K TC9031
118E-000057302284022291P CAP CER CC 2200p/50V X7R P=5.0 K TC9041
119N/A2275450901P CAP CER TC 5P/3KV SL P=7.5 J CC9051
120N/A2330006491P CAP ELE SPECIAL (3000HR) EC 470u /16V 10*13 P=5.0 TC9061
121N/A2284010391P CAP CER CC 0.01u/50V X7R P=5.0 K TC9071
122N/A2302033291P CAP,MTL MEF 3300pF/50V P=5.0 J TC9081
123N/A2302039291P CAP,MTL MEF 3900pF/50V P=5.0 J T C9091
124E-C-0404-48332281110491P CAP CER CC 0.1u/50V (Y5P) P=5.0 K TC9101
125N/A2302068391P CAP,MTL MEF 0.068u/50V P=5.0 J TC9111
126E-C-0404-22732272156091P CAP CER TC 56p/50V CH P=5.0 J TC9121
127E-C-0404-34702272133191P CAP CER TC 330p/50V CH P=5.0 J TC9131
128N/A2302010391P CAP,MTL MEF 0.01uF/50V P=5.0 J TC9141
129N/A2333433691P CAP ELE 105'C EC 33u/ 25V 5*11 P=5.0 TC9151
130E-000044592275827001P CAP CER TC 27pF/3KV CH J P=7.5 CC9161
131E-C-0404-48332281110491P CAP CER CC 0.1u/50V (Y5P) P=5.0 K TC9171
132N/A2275450901P CAP CER TC 5P/3KV SL P=7.5 J CC9181
133N/A2302033291P CAP,MTL MEF 3300pF/50V P=5.0 J TC9191
134N/A2302039291P CAP,MTL MEF 3900pF/50V P=5.0 J T C9201
135N/A2284010391P CAP CER CC 0.01u/50V X7R P=5.0 K TC9211
136N/A2330006491P CAP ELE SPECIAL (3000HR) EC 470u /16V 10*13 P=5.0 TC9221
137E-C-0404-48332281110491P CAP CER CC 0.1u/50V (Y5P) P=5.0 K TC9231
138N/A2302068391P CAP,MTL MEF 0.068u/50V P=5.0 J TC9241
139E-C-0404-48332281110491P CAP CER CC 0.1u/50V (Y5P) P=5.0 K TC9251
140E-000057302284022291P CAP CER CC 2200p/50V X7R P=5.0 K TC9261
141E-000057302284022291P CAP CER CC 2200p/50V X7R P=5.0 K TC9271
142E-C-0404-48332281110491P CAP CER CC 0.1u/50V (Y5P) P=5.0 K TC9281
143E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD1011
144E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD1021
145E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD1031
146E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD1041
147E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD1051
148E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD1061
149E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD1071
150E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD1081
151N/A2363219095P DIODE,RECT (EOL) 1N4002 DO-41 NID1091
152N/A2363219095P DIODE,RECT (EOL) 1N4002 DO-41 NID1101
153E-D-0403-12972363220895P DIODE,RECT 11EQ04 NID1121
154N/A2363703891P LED 3∮ GRN/YELD7011
155N/A2368501800P RECT,BRIDGE 2KBP06M 600V/2A PECD8011
156N/A2363231995P DIODE,RECT UF4007 DO-41 1000V/1A PECD8061
157N/A2363230795P DIODE,RECT 1H5G-TG-WS R-1 WILLASD8071
158E-D-0403-02542363507995P DIODE,ZENER MTZJ22B 20.64-21.71V ROHMD8081
159E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD8091
160E-D-0403-15322363505995P DIODE,ZENER HZ12A2-TA-E DO-35 RENESASD8101
161E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD8131
162N/A2363302800P DIODE,SCHOTTKY SRF10120C ITO-220AB MOSPECD8211
163N/A2363220212P DIODE,RECT 31DQ10FC NID8221
164N/A2363220212P DIODE,RECT 31DQ10FC NID8231
165E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9021
166E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9051
167E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9061
168E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9071
169E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9081
170E-D-0403-15002363222195P DIODE,RECT SB140 DO-41 PECD9091
171E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9101
172E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9111
173E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9121
174E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9131
175E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9141
176E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9151
177E-D-0403-15002363222195P DIODE,RECT SB140 DO-41 PECD9161
178E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9171
179E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9181
180E-D-0403-05312363600195P DIODE,SWITCH 1N4148 DO-35 WILLASD9191
181E-FS-0410-00092213125207P FUSE 21502.5(2.5A) LITTELF8011
182M-WR-0828-04782428106100P JUMPER 0.6∮*10.0mmF9011
183N/A2365424900P DIGITAL IC TSU16AS-LF SDIP-56 MstarI1011
184N/A2365500016P MICRO-CONTROL IC MTV512GMN64 PDIP-40 MYSONI1021
185N/A2365335086P LINEAR IC AIC1117A-18PY SOT223 AICI1031
186N/A2365335010P LINEAR IC AP1084T33L TO-220 AnachipI1041
187E-IC-0401-22692365915896P IC,DIGITAL SMD 24LC16BT/SN SO-8 MICROCHIPI1051
188N/A2365335056P LINEAR IC LD7552-BS SOP-8 LEADTRENDI8011
189E-PC-0411-00832362401800P PHOTO COUPLR TLP621 TOSHIBAI8021
190N/A2365328191P LINEAR IC AP431VLA TO-92 ATCI80310
191N/A2365335046P LINEAR IC OZ9932GN SOIC-8 O2-MICROI9011
192N/A2365330291P LINEAR IC KA78L05AZ TO-92 FAIRCHILDI9021
193M-WR-0828-04782428106100P JUMPER 0.6∮*10.0mmJ1011
194M-WR-0828-04502428106075P JUMPER 0.6∮*7.5mmJ10210
195M-WR-0828-04502428106075P JUMPER 0.6∮*7.5mmJ1037
196M-WR-0828-04502428106075P JUMPER 0.6∮*7.5mmJ1057
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
R134
470
R133
1
Q103
2N3906
10K
2
3
R132
10K
LED_A
R137
470
2
1
3
Q104
2N3906
R136
10K
R135
10K
LED_G
Page 67
10.6. KEY PAD
P701
2_SELECT
DOWN
UP
MENU
GND
LED_GREEN
LED_AMBER
LCD_ONOFF
JST-PH8P-2.0-180
1
2
3
4
5
6
7
8
3
1
2
S701
SW
1
D701
LED
2
1
2
S702
SW
1
S704
SW
2
1
2
S703
SW
1
S705
SW
2
P/N :
Key_pad
2202131400
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
64
Page 68
10.7. A/D POWER
C803
4700pF
-+
R801 NA
R802
10 3A
R812
1M /1/4WS
R803
1M /1/4WS
C804
NC
C801
0.47uF
L802
0.5X3T
F801
T2.5A/250V
D801
2KBP06M
L805
ET-20
C805
100uF/400V
+
L807
OPEN
682P/DIP
L808
0.5X3T
C812
C802
4700pF
C813
3300pF/500V
R806 511K/1206
R843 511K/1206
C807
R804 511K/DIP
0.1UF
100K/1/4WS
100K/1/4WS
R839NC
R839
1.2M/1/4WS
R848
8.2K/1/4WS
I801LD7552
1
GND
2
FB
3
VIN
4
RI
R808
110K 1%
R833
R834
D805NC
1.2M/1/4WS
C810
+
C809
+
10uF/50V
Driver
VDD
Sense
RT
C811
1000P/DIP
R815
3.3K/1/4W
C815
4.7U/50V
R835
100K/1/4WS
R836
100K/1/4WS
R844
R853
12R/1/4WS
D809
1N4148
3.3UF/50V
R807
39/1206
8
7
6
D808
5
27V(3.3V)
22-2V(5V)
R809 47R/1206
T801 ER28H 12PIN 2374228012
C806
1000PF/500V
D806
UF4007
L806
D807
1U4G
57
12
BEAD
R805
1.2M/1/4WS
Q801
AP03N70F
L801
BEAD
R832
820R/1/4WS
10R/1/4WS
R811
0.75R/ 2WS
C808
180P/DIP
4
3
I802
TLP621
1
2
3
1
4
5
4700PF
R852
I803
TL431D
C831
R842
NC
R820
22 1/2W
11,12
5
R821
9
10 1/2W
D823
10
4
7,8
D822SR306
1N4148
1N4148
R823
1K/DIP
R826
5.6K
C820
1000PF/1KV
D821
SRF10120
C821
1000PF/500V
SR306
R828
R845
1.58K 1%
R840
C839
3K/DIP
C845
0.1uF/50V
+
C826
4700PF/DIP
R830
1K 1%
C832
D812
D813
1uF/50V
R851JUMPER WIRE
C822
1500uF/16V
L803
5.2uH
+
L804
JUMPER
C824
1000UF/10V
+
R846
820/1/4WS
1K
Q804
2N3906 DIP EBC
Q803
2N3904 DIP EBC
NC
R825
11.8K 1%
C823
470uF/25V
+
C825
470uF/16V
+
R854
8201/4WS
R824
24K 1%(5V)
R831
91K 1%
R837 1K
Brightness
ON/OFF
10
9
8
7
6
5
4
3
2
1
W/O P802
12V
5V
D814
NC
D810
NC
12V
NC
ON/OFF
DIM
5V
5V
GND
Mute
Volume
GND
R849
1K/1/2WS
R850
1K/1/4WS
L
S801
FG
N
AC IN 100~240V
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
65
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10.8. INVERTER
L901
BEAD
VCC12V
78L05
D921
NC
ON/OFF
Brightness
I902
R922
5.1M
5V
51.1K/1%
D901 short and I902 open
5V
D901
1N4148
23
1
D920
NC
R929
IN OUT
GND
0.1uF
C901
47nF
R908
10K
R903
NC
C925
C912
27P
R926
91K/1%
33uF/25V
+
C915
1
2
3
45
C913
330P
D919
1N4148
C928
0.1uF
SST
ISEN
CT
VSEN
GNDA
VCCA
DRV2 DRV1
I901
OZ9932G
Q901
2SC945P
R923
110K/1%
D903
1N4148
8
7
6
1000P
8
1
C903
7
2
R915
JUMPER
R933
JUMPER
6
3
R906
10
45
JUMPER
JUMPER
R907
10
Q905
AP9977GM
R916
R935
8
C927
1000P
7
C904
1000P
C914
0.01uF
R912
10
C922
470U/16V
6
R924
1M
C907
0.1uF
R911 10
+
C906
+
C926
1000P
C921
0.1uF
470uF/16V
2374301105>2374301204
71,2
3,4
105,6
T901
D905
1N4148
C908
0.056UF/50V
D907
1N4148
R921
5.1K
D909 SB140
D908
1N4148
T902
2374300800
71,2
3,4
105,6
D911
1N4148
C919
0.056UF/50V
D913
1N4148
C902
22P,3KV
C905
5P,3KV
C909
330PF/50V
C916
22P,3KV
C918
5P,3KV
C920
330PF/50V
R905
1.5M,3KV
2N7000 DIP SGD
Q907
Q908 2N7002 DIP SGD
R909
R910
NC
2.2K/1%
C910
0.1uF
C911
68nF
R925
1.5M,3KV
Q910 2N7000 DIP SGDQ909 2N7000 DIP SGD
R927
R928
NC
2.2K/1%
D916
SB140
C923
0.1uF
D906
1N4148
R918
1M
R919
698/1%
D915
1N4148
R932
681 1%
R934
1M
P901
P902
D902
1N4148
D917
1N4148
R914
681 1%
R920
698/1%
P903
P904
D912
1N4148
D918
1N4148
1
2
1
2
1
2
1
2
C917
0.1uF
D910
1
2
3
45
1N4148
66
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
Q911
AP9977GM
R930
5.1K
D914
1N4148
C924
68nF
R937
698/1%
R936
698/1%
Page 70
11. PCB Layout Diagrams
11.1. MAIN PCB TOP VIEW
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11.2. MAIN PCB BOTTOM VIEW
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68
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11.3. CON PCB TOP VIEW
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11.4. CON PCB BOTTOM VIEW
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* 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 ExcellentGood 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 VA902-3_VA902b-3
71
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