ViewSonic VE710S - LCD Display - TFT User manual

Model No. VS10047
17” Color TFT LCD Display
Service Manual
ViewSonic VE710s/b-21
ViewSonic
381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
(VE710s/b-2_VA721_SM_770 Rev. 1aMar.2004)
VA721

Copyright
Copyright
¤
2004by ViewSonic Corporation. All rights reserved. No partof 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
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Optiquest is a registered trademark of ViewSonic Corporation.
Revision History
Revision Date Description Of Changes Approval
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1a 03/11/04 Initial Release DCN-3765 Angela Luh
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TABLE OF CONTENTS
2. Specification
3. Front Panel Function Control Description
4. Circuit Description
6. Trouble Shooting Flow Chart
9. Block Diagram
10. Schematic Diagrams
7. Recommended Spare Parts List
1. Precautions and Safety Notices
5. Adjusting Procedure
8. Exploded Diagram And Spare Parts List
11. PCB Layout Diagrams
1
2
4
10
14
16
18
33
36
37
44
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1.1. SAFETY PRECAUTIONS
This monitor is manufactured and tested on a ground principle that a user's safety comes first. However, improper
use or installation may cause damage to the monitor as well as to the user. Carefully go over the following
WARNINGS before installing and keep this guide handy.
WARNINGS:
.This monitor should be operated only at the correct power sources indicated on the label on the rear end of the
monitor. If you're unsure of the power supply in your residence, consult your local dealer or power company.
• Do not try to repair the monitor your self as it contains no user-serviceable parts. This monitor should only be
repaired by a qualified technician.
• Do not remove the monitor cabinet. There is high-voltage parts inside that may cause electric shock to human
bodies, even when the power cord is unplugged.
•Stop using themonitor if thecabinet is damaged. Haveit checked by a service technician.
• Put your monitor only in a clean, dry environment. If it gets wet, unplug the power cable immediately and
consult your service technician.
•Alwaysunplugthe monitorbefore cleaningit. Clean the cabinet with a soft, dry cloth.Apply non-ammonia
based cleaner onto the cloth, not directly onto the glass screen.
• Keep the monitor away from magnetic objects, motors, TV sets, and transformer.
• Do not place heavy objects on the monitor or power cord.
1.2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection
afforded by them cannot necessarily be obtained by using replacement components rated for higher voltages,
wattage, etc. Before replacing any of these components read the parts list in this manual carefully. The use of
substitute replacement parts which do not have the same safety characteristics as specified in the parts list may
create shock, fire, or other hazards.
1.3. SERVICE NOTES
1. When replacing parts or circuit boards, clamp the lead wires around terminals before soldering.
2. When replacing a high wattage resistor (more than 1W of metal oxide film resistor) in circuit board, keep the
resistor about 5mm away from circuit board.
3. Keep wires away from high voltage, high temperature components and sharp edges.
4. Keep wires in their original position so as to reduce interference.
5. Please refer to user's manual for additional instructions on using this product.
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1. Precautions and Safety Notices

2.1. PRODUCT SPECIFICATIONS
LCD Panel 17.0" TFT
Power Management Energy Star compliant VESA
DPMS compatible
< 1W
Displayable Resolution SXGA 1280× 1024 (max.)
Pixel Dimension 0.264(H)× 0.264(V)mm
LCD Display Color16.2 m Color(6+2 Bits)
Viewing Angle CR≧10
Horizontal: 140 deg
Vertical: 130 deg
Contrast Ratio 450 : 1 (typ.) 360:1 (min.)
Brightness 240 cd/ m2 (min.)
300 cd/m2 (typ.)
Response Time Tr: 9 ms Tf: 16 ms (typ.)
Tr: 18 ms Tf: 32 ms (max.)
Active DisplayArea 337.9mm(H)× 270.3mm(V)
Temperature Operating: 0°C ~ +40°C
Storage: -20°C ~ +60°C
Compliance UL, CUL, TÜV, CE, FCC, VCCI, BSMI,CCC, Energy Star, Energy, TCO'99,
Power Input Voltage: 100~240 Vac
Consumption: 35 Watts (Max.)
2.2. FACTORY SUPPORTING MODES
Primary Preset: VESA 1280 x 1024 @ 60Hz
Look up table timing: 1. 640 x 350 @ 70Hz, 31.5kHz
2. 640 x 480 @ 60Hz, 31.5kHz
3. 640 x 480 @ 67Hz, 35.0kHz
4. 640 x 480 @ 75Hz, 37.5kHz
5. 640 x 480 @ 72Hz, 37.9kHz
6. 640 x 480 @ 85Hz, 43.27kHz
7. 720 x 400 @ 70Hz, 31.5kHz
8. 800 x 600 @ 56Hz, 35.1kHz
9. 800 x 600 @ 60Hz, 37.9kHz
10.800 x 600 @ 75Hz, 46.9kHz
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2. Specification
PSB, PCBC, NOM, C-TICK, Gost-R / Hygienic

11. 800 x 600 @ 72Hz, 48.1kHz
12. 800 x 600 @ 85Hz, 53.7kHz
13. 832 x 624 @ 75Hz, 49.7kHz
14. 1024 x 768 @ 60Hz, 48.4kHz
15. 1024 x 768 @ 70Hz, 56.5kHz
16. 1024 x 768 @ 72Hz, 58.1kHz
17. 1024 x 768 @ 75Hz, 60.0kHz
18. 1024 x 768 @ 85Hz, 68.67kHz
19. 1280 x 1024 @ 60Hz, 63.4kHz
20. 1280 x 1024 @ 75Hz, 79.97kHz
21. 1280x720 @ 60Hz, 45kHz
2.3. D-SUB CONNECTOR
D-SUB15PINCONNECTOR
1.R 6.GND 11.NC
2.G 7.GND 12.SDA
3.B 8.GND 13.H.SYNC
4.NC 9. +5V 14.V.SYNC
5.GND 10.GND 15.SCL
12345
678910
11 12 13 14 15
SIGNALLEVEL
CONNECTOR SIGNAL DESCRIPTION
R RED 0.7vp-p(VIDEO)
G GREEN 0.7vp-p(VIDEO)
B BLUE 0.7vp-p(VIDEO)
H H/SYNC TTL positive or negative
V V/SYNC TTL positive or negative
SDA DDC1/2B TTL
SCL DDC1/2B TTL
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Front Control Panel
shown below in detail
Main Menu
With OnView controls
Scrolls through menu options and
adjusts the displayed control.
Also a shortcut to display the
Contrast adjustment control
screen.
Power
On/Off
Displays the control
screen for the highlighted
control.
Also toggles between two
controls on some
screens.
Also a shortcut to Auto
Image Adjust.
Power light
Green = ON
Orange = Power Saving
Displays the Main Menu
or exits the control screen
and saves adjustments.
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3. Front Panel Function Control Description

. (The black border around the
edge of the screen should barely touch the illuminated “active area” of the
LCD dislay.)
The line at the
bottom of the
screen tells you
what you can do
next: Exit or Select
the control that is
highlighted.
Main Menu
1:EXIT 2:SELECT
Auto Adjust
Contrast/Brightness
Color Adjust
Information
Image Adjust
Setup Menu
Memory Recall
AUTO
SET
i
?
Do the following to adjust the screen image:
1To display the Main Menu, press button [1].
4To adjust the control, press the up Ior down Jbuttons.
5To save the adjustments and exit the menu, press button [1] twice.
Thefollowing tips may help you optimizeyour 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
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.
2To highlight a control you want to adjust, press Ior Jto scroll up or down
the Main Menu.
3To select the highlighted control, press button [2]. A control screen appears
like the example shown below.
Contrast
1:EXIT 2: Brightness
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Main Menu Controls
Adjust the menu items shown below by using the up Iand down Jbuttons.
Control Explanation
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 adjusts background black level of the screen image.
Color Adjust 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).
6500K — Adds red to the screen image for warmer white and
richer red. Default setting.
9300K — Adds blue to the screen image for cooler white (used
in most office settings with fluorescent lighting).
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.
5400K — Adds green to the screen image for a darker color.
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Information displays the timing mode (video signal input)
coming from the graphics card in your computer. See your
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.
Control Explanation
i
H. Size (Horizontal Size) adjusts the width of the screen image.
NOTE: Vertical size is automatic with your LCD dislay.
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.
Image Adjust
The Image Adjust controls are explained below:
Image Adjust
1:EXIT 2:SELECT
H./V. Position
H. Size
Fine Tune
Sharpness
1To select color (R, G or B) press button [2].
2To adjust selected color, press Ior J.
3When you are finished making all color adjustments, press
button [1] twice.
User — Individual adjustments for red, green, and blue.
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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 adjusts the clarity and focus of the screen image.
Setup Menu displays the menu shown below.
Explanation
the menus and control screens.
The Setup Menu controls are explained below.
OSD Position 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.
Resolution Notice advises the optimal resolution to use.
Language Select allows you to choose the language used in
OSD
?
Control
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Memory Recall returns adjustments to the original factory
settings if the display is operating in a factory Preset Timing
Mode listed in this user guide.
Control Explanation
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.
OSD
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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)
White Balance.
[1] + [▼
▼▼
▼] Power Lock
[1] + [▲
▲▲
▲] OSD Lock

A. Scaling controller
TheADC converts RGB analog signals todigital signals that the scaling chip can acknowledge.
The HSYNC input receives a logic signal and provides the frequency reference for pixel clock generation.
The scaling IC converts the input signal rangingfromVGA to SXGA into SXGA resolution that panel
can acknowledge.
GENERALDESCRIPTION
The MST8116A is a high performance, and fully integrated graphics processing IC solution for LCD
monitors with resolutions 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), and RSDS display interface. To further reduce system costs, the MST8116A also integrates
intelligent power management control capability for green-mode requirements and spread-spectrum support
for EMI management.
PIN DESCRIPTION
CPU Interface
Pin Name Pin Type Function Pin
HWRESET Schmitt Trigger Input
w/ 5V-tolerant Hardware reset; active high 32
CS Input w/ 5V-tolerant 3 Wire Serial Bus Chip Select; active high 69
SDA I/O w/ 5V-tolerant 3 Wire Serial Bus Data; 4mA driving strength 70
SCL Input w/ 5V-tolerant 3 Wire Serial Bus Clock 71
INT Output CPU interrupt; 4mAdriving strength 72
Analog Interface
Pin Name Pin Type Function Pin
HSYNC0 Schmitt Trigger Input
w/ 5V-tolerantAnalog HSYNC input 37
VSYNC0 Schmitt Trigger Input
w/ 5V-tolerant Analog VSYNC input 38
REFP Internal ADC top de-coupling pin 66
REFM InternalADC bottom de-coupling pin 67
RIN0 Analog Input Analog red input 63
RIN0M Analog Input Reference ground for analog red input 62
SOGIN0Analog Input Sync-on-green input 61
GIN0 Analog Input Analog green input 60
GIN0M Analog Input Reference ground for analog green input 59
BIN0 Analog Input Analog blue input 58
BIN0M Analog Input Reference ground for analog blue input 57
REXT External resistor 390 ohm to AVDD 52
RSDS Interface
Pin Name Pin Type Function Pin
CLKAP Output A-Link Positive RSDS Differential Clock Output from“Odd” Channel 118
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4. Circuit Description

CLKAN Output A-Link Negative RSDS Differential Clock Output from“Odd” Channel 119
CLKBP Output B-Link Positive RSDS Differential Clock Output from“Even” Channel 120
CLKBN Output B-Link Negative RSDS Differential Clock Output from“Even” Channel 121
BA[3:1]P Output A-Link Positive RSDS Differential Data Output from“Odd” Channel 92, 90, 88
BA[3:1]N Output A-Link Negative RSDS Differential Data Output from“Odd” Channel 93, 91, 89
GA[3:1]P Output A-Link Positive RSDS Differential Data Output from“Odd” Channel 102, 100, 98
GA[3:1]N Output A-Link Negative RSDS Differential Data Output from“Odd” Channel103, 101,99
RA[3:1]P Output A-Link Positive RSDS Differential Data Output from“Odd” Channel 112, 110, 108
RA[3:1]N Output A-Link Negative RSDS Differential Data Output from“Odd” Channel 113, 111, 109
BB[3:1]P Output B-Link Positive RSDS Differential Data Output from“Even” Channel 4, 128, 124
BB[3:1]N Output B-Link Negative RSDS Differential Data Output from“Even” Channel 5, 1, 125
GB[3:1]P Output B-Link Positive RSDS Differential Data Output from“Even” Channel 14, 12, 8
GB[3:1]N Output B-Link Negative RSDS Differential Data Output from“Even” Channel 15, 13, 9
RB[3:1]P Output B-Link Positive RSDS Differential Data Output from“Even” Channel 24, 22, 16
RB[3:1]N Output B-Link Negative RSDS Differential Data Output from“Even” Channel 25, 23, 17
GPO[8:5] Output TCON GPO[8:5]; 4mA driving strength 29, 28, 30,31
GPO[4:0] Output w/ Pull-down TCON GPO[4:0]; 4~12mA driving strength programmable 79-83
OINV Output w/ Pull-down Resistor TCON “Odd” Channel Inversion; 4~12mA driving strength
programmable 78
EINV Output w/ Pull-down Resistor TCON “Even” Channel Inversion; 4~12mA driving strength
programmable 77
OSP Output w/ Pull-down Resistor TCON “Odd” Channel Start Pulse; 4~12mA driving strength
programmable 76
ESP Output w/ Pull-down Resistor TCON “Even” Channel Start Pulse; 4~12mA driving strength
programmable 75
GPIO Interface
Pin Name Pin Type Function Pin
GOUT1/PWM1 Output GOUT1/PWM1; 4mAdriving strength 74
GOUT0/PWM0 Output GOUT0/PWM0; 4mAdriving strength 73
Misc. Interface
Pin Name Pin Type Function Pin
BYPASS For External Bypass Capacitor 3
XIN Crystal Oscillator Input Xin 33
XOUT Crystal Oscillator Output Xout 34
Power Pins
Pin Name Pin Type Function Pin
AVDD 3.3V Power ADC Power 45, 51, 55, 65
AVSS GroundADC Ground 39, 42, 48, 56,
64, 68
AVDD_PLL 3.3V Power PLL Power 53
AVSS_PLL Ground PLL Ground 54
AVDD_MPLL 3.3V Power MPLL Power 35
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AVSS_MPLL Ground MPLL Ground 2, 36
VDDP 3.3V Power Digital Output Power 11, 21, 84, 94,
104, 114, 126
GNDP Ground Digital Output Ground 10, 20, 85, 95,
105, 115, 127
VDDC 2.5V Power Digital Core Power 18, 87, 97, 117
GNDC Ground Digital Core Ground 19, 86, 96, 116
No Connects
Pin Name Pin Type Function Pin
NC No Connect. Leave These Pins Floating.
6, 7, 26, 27, 40,
41, 43, 44, 46,
47, 49, 50, 106,
107, 122, 123
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 LevelAdjustment 62 %FS
SWITCHING PERFORMANCE
Maximum Conversion Rate 165 MSPS
Minimum Conversion Rate 20 MSPS
HSYNC Input Frequency 15 200 kHz
PLL Clock Rate 20 162.5 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
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
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Analog Bandwidth, Full Power 250 MHz
Channel to Channel Matching 0.5% Full-Scale
3.3V Supply Voltages VVDD_33 -0.3 3.6 V
2.5V Supply Voltages VVDD_25 -0.3 2.75 V
Input Voltage (5V tolerant inputs) VIN5Vtol -0.3 5.0 V
Input Voltage (non 5V tolerant inputs) VIN -0.3 VVDD_33 V
B. MTV312M64
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 DDC
interface, 4-channelA/D converter, and a 64K-byte internal program Flash-ROM.
A “CMOS output pin” means it can sink and drive at least 4mAcurrent. It is not recommended to use such
pin as input function.
A “open drain pin” means it can sink at least 4mA current but only drive 10~20uA to VDD. It can be used as
input or output function and needs an external pull up resistor.
A “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 100uA
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.
POWER CONFIGURATION
The MTV312M can work on 5V or 3.3V power supply system.
In 5V power system, the VDD pin is connected to 5V power and the VDD3 needs an external capacitor, all
output pins can swing from 0~5V, input pins can accept 0~5V input range.
And ADC conversion range is 5V. However, X1 and X2 pins must be kept below 3.3V.
In 3.3V power system, the VDD and VDD3 are connected to 3.3V power, all output pins swing from 0~3.3V,
HSYNC, VSYNC and open drain pin can accept 0~5V input range, other pins must be kept below 3.3V. And
the ADC conversion range is 3.3V.
C. INVERTER
In order to drive the CCFLs embedded in the panel module, there is a half bridge inverter to convert
the input 12V up to several hundred volts AC.
The inverter is formed bysymmetric stages in order to drive the separate lampmodules.
The input stage consists of a PWM controller, half bridge inverter, and switching MOSFET to convert DC
input into AC output.
The output stage consistsof a tuning capacitor, couplingcapacitor, transformer, push-pullMOSFET pair,
and one resister is serial to lampfor output voltage feedback.
There are twosignal to control the inverter which comefrom 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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5.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS
1. Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully
preset at the factory.
3. ESD protection is needed before adjustment.
5.2. MAIN ADJUSTMENTS
NO. FUNCTION DESIGNATION
1. White Balance Function Key
2. GEOMETRY Function Key
5.3. ALIGNMENT PROCEDURES
Adjustment Conditions and Precautions:
(A). Power supply voltage:
AC 110/120V±10% 60 Hz±5%, AC 220/240V±10% 50 Hz ±5%.
(B). Warm up time:
The display must be power ON for at least 30 minutes at full white pattern before starting alignments.
This is especially critical in color temperature and white balance adjustments.
(C). Signals: reference the front detail specifications and timing table.
Video : reference the front detail specifications.
1. Adjustment of 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 “▲” and “ ” and turn on power at the same time after power LED is on,
release “▲” and “ ” key, Then press “ ” key go to factory mode. (Fig.1)
2
2 1
(Fig.1)
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 Temerature Adjust”, Press key, Then OSD will display
Fig.2
222
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5. Adjusting Procedure

(Fig.2)
(4) 9300K verify: move cursor to 9300K Press key.
Press “▼” ,“▲” key adjust R.G.B value
2
x=0.283
±0.02
y=0.298
±0.02
Press key return to Fig.2
1
(5) 6500K verify: Repeat (4) press “▼” ,“▲” move cursor to 6500K press key
2
x=0.313 ±0.02
y=0.329 ±0.02
Y
≧240 cd/m2
(6) 5400K verify: Repeat (4) press “▼” ,“▲” move cursor to 5400K press key
2
x=0.332
±0.02
y=0.348
±0.02
(7) Press key go back to Fig.2, Then press key return to Fig.1, Power key
OFF/ON quit factory mode.
1 1
G. Color Temperature & Luminance Verify:
BRIGHTNESS MAX, CONTRAST MAX
9300K: x=0.283 ±0.02 y=0.298 ±0.02
6500K: x=0.313 ±0.02 y=0.329 ±0.02 Y≧240 cd/㎡
5400K: x=0.332 ±0.02 y=0.348 ±0.02
2. Geometry:
(a). Set cross-hatch pattern and preset timing as timing table listed.
(b). Change to each mode in turn and wait for the monitor finish auto-alignment and save process before
change to next mode.
(c). After all ofthe modes are adjusted, exit OSD menuandpress PWR OFF to exit factory mode.
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6.1. NO POWER
POWER
STAR
Check
3.3V O/P
C825
Check
P802 5,6 PIN Check P901,P902 PANEL
Check
12V O/P
C823
Check F801
D801~D804
Check
I801
,Q801
Check
D822
I802,I803
Check I901
L901,L903
T901,T902
Q904,Q905
Check
I901
MAIN PCB
12V
3.3V
12V
CHECK
POWER PCB
OK?
STAR
CHECK
MAIN PCB
5V OK?
3.3V OK?
1.8V OK?
CHECK
I103,
SURROUND CAP
BEAD OK?
CHECK
I104,
SURROUND CAP
BEAD OK?
CHECK
I106,I107
SURROUND CAP
OK?
CHECK
I101,
SURROUND CAP
BEAD OK?
N
N
N
Y
Y
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6. Trouble Shooting Flow Chart

6.2. NO DISPLAY
No
Display
Check LED Color
Check Power
region
Refer to NO POWER
trouble shoot flow Chart
Check IO cable is
connect OK ?
AmberDark Check I/P signal is in
pwr saving state?
Yes
Check X102 Crystal
12MHz is working?
Amber & Green
Check I106 is OK ?
Press Power key
ON/OFF is OK ?
(See LED is green or
dark.)
Check uP I106
Reset is Ok ?
No Change
I106
Yes
Check Reset circuit
C173,D125
No
Yes
Press "1" key if OSD
menu is on display ?
Yes
Check Keypad
pcb is OK ?
No
Check if
Inverter is Ok ?
Yes
Change
Inverter
No
Check I105
MST8016A if
HWRST Pin#32 have
reset pulse ?
Check uP I106
pin#17 send reset
pulse ?
No
Yes
Check X101 Crystal
14.318MHz is
working ? Change X101
No
Yes Yes
Check I105
Pin#70,71 data bus
have signal
Change I105 LCD
controller IC
No
Yes
Check panel Powers
VLCD_3V3
VLCD_12V
correct
Yes
Change LCD panel
Yes
No
Green
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ViewSonic CorporationConfidential
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Do Not Copy VE710s/b-2
VA721