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VP930-3
Service Bulletin 001
2 pgs84.33 Kb0
Service Manual
76 pgs2.88 Mb0

Viewsonic VP930-3, VP930B-3 Service Manual

Service Manual
ViewSonic VP930-3
VP930b-3
Model No. VS10725
19” Color TFT LCD Display
(VP930-3_VP930b-3_SM Rev. 1a Oct. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright © 2006 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 10/26/2006 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 13
5. Adjustment Procedure 20
6. Troubleshooting Flow Chart 39
7. Recommended Spare Parts List 43
8. Exploded Diagram and Exploded Parts List 57
9. Block Diagram 62
10. Schematic Diagrams 63
11. PCB Layout Diagrams 70
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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.
The LCD module should be supplied by power complied with requirements of Limited
Power Source (IEC60950 or UL1950), or be applied exemption.
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(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.
Take out the monitor with cushions Taking out the monitor by grasping the LCD
Surface of the LCD panel is pressed by fingers
and that may cause “Mura”
panel. That may cause “Mura”
2
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:
2. Signal Interface
Video Interface
Analog Input Connector D-Sub1 = DB-15 (Analog)
Default Input Connector Defaults to the first detected input Video Cable Connector Pin out Refer to Appendix A; Compliant DDC/CI. Video Signals Video RGB (Analog)
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 38 Watts (Typ.)
4. AUDIO INTERFACE (SPEAKER SPECIFICATION)
No Audio function
5. lectrical Requirements
Horizontal Frequency 24 – 82 kHz
Vertical Refresh Rate 50 – 85 Hz.
Maximum Pixel Clock 135 MHz
Sync Polarity Independent of sync polarity.
Timing Table
Item Timing
Contrast = 70%, Brightness = 100%
D-Sub2 = DB-15 (Analog)
DVI-D = DVI-I (Digital)
Separate Sync / Composite Sync / SOG TMDS (Digital)
SOG
Digital - TMDS
Remark
Analog
Separated
Composite
DMT;
1 640 x 350 @ 70 Hz, 31.5 KHz 　 　 　 　
2 640 x 400 @ 60 Hz, 31.5 KHz 　 　 　 　 DMT
3 640 x 400 @ 70 Hz, 31.5 KHz 　 　 　 　 DMT
4 640 x 480 @ 50 Hz, 24.7 KHz 　 　 　 　 DMT
5 640 x 480 @ 60 Hz, 31.5 KHz 　 　 　 　 DMT;
6 640 x 480 @ 67 Hz, 35 KHz 　 　 　 　 For MAC
7 640 x 480 @ 72 Hz, 37.9 KHz 　 　 　 　 DMT
The vertical image size might be not full screen
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8 640 x 480 @ 75 Hz, 37.5 KHz 　 　 　 　 DMT
9 640 x 480 @ 85 Hz, 43.3 KHz 　 　 　 　 DMT
10 640 x 870 @ 75 Hz, 68.9 KHz 　 　 　 　 MAC
11 720 x 400 @ 70 Hz, 31.5 KHz 　 　 DMT
12 720 x 480 @ 60 Hz, 31.5 KHz 　 　 　 　 DMT
13 720 x 576 @ 50 Hz, 31.3 KHz 　 　 　 　 DMT”
14 800 x 600 @ 56 Hz, 35.1 KHz 　 　 　 　 DMT
15 800 x 600 @ 60 Hz, 37.9 KHz 　 　 　 　 DMT
16 800 x 600 @ 72 Hz, 48.1 KHz 　 　 　 　 DMT
17 800 x 600 @ 75 Hz, 46.9 KHz 　 　 　 　 DMT
18 800 x 600 @ 85 Hz, 53.7 KHz 　 　 　 　 DMT
19 832 x 624 @ 75 Hz, 49.7 KHz 　 　 　 　 MAC
20 1024 x 768 @ 50 Hz, 39.6 KHz 　 　 　 　 DMT;
21 1024 x 768 @ 60 Hz, 48.4 KHz 　 　 　 　 DMT
22 1024 x 768 @ 70 Hz, 56.5 KHz 　 　 　 　 DMT
23 1024 x 768 @ 72 Hz, 58.1 KHz 　 　 　 　 DMT
24 1024 x 768 @ 75 Hz, 60 KHz 　 　 　 　 DMT
25 1024 x 768 @ 75 Hz, 60.2 KHz 　 　 　 　 For MAC
26 1024 x 768 @ 85 Hz, 68.7 KHz 　 　 　 　 DMT
27 1152 x 864 @ 75 Hz, 67.5 KHz 　 　 　 　 DMT
28 1152 x 870 @ 75 Hz, 68.7 KHz 　 　 　 　 For MAC
29 1280 x 720 @ 50 Hz, 37.5 KHz 　 　 　 　 720p
30 1280 x 720 @ 60 Hz, 45 KHz 　 　 　 　 720p
31 1280 x 768 @ 50 Hz, 39.6 KHz 　 　 　 　 DMT
32 1280 x 768 @ 60 Hz, 47.8 KHz 　 　 DMT;
33 1280 x 768 @ 75 Hz, 60.3 KHz 　 　 DMT;
34 1280 x 768 @ 85 Hz, 68.6 KHz 　 　 DMT;”
35 1280 x 960 @ 50 Hz, 49.4 KHz 　 　 　 　 DMT
36 1280 x 960 @ 60 Hz, 59.7 KHz 　 　 　 　 DMT
37 1280 x 960 @ 75 Hz, 75.2 KHz 　 　 　 　 DMT
38 1280 x 1024 @ 50 Hz, 52.7 KHz 　 　 　 　 DMT
39 1280 x 1024 @ 60 Hz, 64 KHz 　 　 　 　 DMT
40 1280 x 1024 @ 75 Hz, 80 KHz 　 　 　 　 DMT
*1. Tolerance ≥ ±2KHz. *2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD
message without blanking.
*3. The image quality of 85Hz mode might be worse than 75Hz.
6. Mechanical
Dimension (Desktop)
Width 412 mm (16.2 inch)
Height (Height adjust to the bottom) 356mm (14 inch)/491mm (19.32 inch)
Depth 289mm (11.4 inch)
Monitor Weight 6.8 Kg (15 lbs)
Dimension (Head Only / Wall Mount)
Width 412 mm (16.2 inch)
Height 336mm (13.2 inch)
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Depth 61mm (2.4 inch)
Monitor Weight 4.2 Kg (9.3 lbs)
*Refer to Figure 1
Ergonomics
Tilt Up ≥ 20º
Tilt Down From 0º down to -3º
Swivel Right ≥135º
Swivel Left ≥135º
Height Adjust 0 ~ ≥ 135 mm
Pivot 0~ 90º(clockwise)
Package Specifications
ViewSonic Packaging Spec
ViewSonic Pallet Spec Refer to ViewSonic Pallet Load Specification REV.1.I
Ink The ink shall not rub off after a suitable drying time.
Multiple Trips
One Unit Packing (Standard) Shipping Carton Type One piece construction with single wall, 0.6 Kg
Shipping Carton Handholds No
Plastic handle PE-LD, 12 g
Poly form EPS, 128 g, 2 pices
Accessory plastic bags PE-LD, 2g
PE bag (covers monitor) PE-LD, 3g
Pallet (for Europe) Poplar, 10 Kg
Pallet (for others) Fumigation wood, 10 Kg
Width / Height / Depth 476 mm (18.7 ") x 470 mm (18.5 ") x 214 mm (8.4")
Gross Weight 8.3 Kg (18.26 lbs)
# units per Pallet 48 units
40’ Container Loading 960 pieces
20’ Container Loading 480 pieces
7. Environmental
Operating Temperature 0°C to +40°C
Storage Temperature -20°C to +60°C
Operating Relative Humidity 20% 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
The “Top Level Assembly” shall meet the ViewSonic Corporation Packaging Spec, VSCPACSPEC003
The carton shall withstand 10 trips by any combination of air, rail, land, or sea transportation.
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3. Front Panel Function Control Description
Main Menu
with OSD controls
Front Control Panel
shown below in detail
Displays the Main
Menu or exits the
control screen and
saves adjustments.
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.
Power light Green = ON Orange = Power Saving
Standby Power On/Off
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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.
4. To adjust the setting, press the upSor downTbuttons.
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.)
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Main Menu Controls
Adjust the menu items shown below by using the upSand downTbuttons.
Control Explanation
Auto Image 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 Image Adjust works with most common video cards. If this function does not work on your LCD display, 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.
Input Select allows the user to toggle between an analog and a digital signal.
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).
sRGB-This 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.
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Control Explanation
9300K - Adds blue to the screen image for cooler white (used in most office settings with fluorescent lighting).
7500K - 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.
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, pressSorT. 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 displays the Manual Image Adjust menu.
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Control Explanation
H./V. Position (Horizontal/Vertical Position) moves the screen image left or right and up or down.
Horizontal Size adjusts the width of the screen image.
Fine Tune sharpens the focus by aligning text and/or graphics with pixel
boundaries.
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.
Input Priority If multiple computers will be connected to the display, this
function can be used to select which computer has priority depending on the selected Input Priority, the display will do a one time detection for available inputs when first powered on.
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 “15 second” setting, if a control is not pushed within 15 seconds, the display screen disappears.
OSD Background allows the user to turn the OSD background On or Off.
OSD Pivot This function is used to rotate the OSD menu, changing the OSD
screen to Landscape or Portrait mode.
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Control Explanation
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.
Exception: This control does not affect changes made with the User Color control, Language Select or Power Lock setting.
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4. Circuit Description
Scaler: M-star TSUM66AJ
GENERAL DESCRIPTION The TSUM66AJ 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, an integrated DVI receiver, 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 TSUM66AJ also integrates intelligent power management control capability for green-mode requirements and spread-spectrum support for EMI management.
The TSUM66AJ incorporates the world’s first coherent oversampled RGB graphics ADC in a monitor controller 1 system . The oversampling 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-oversampled systems. 2 The TSUM66AJ also incorporates a new Dynamic Frame Rate (DFR) generator 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.
BLOCK DIAGRAM
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14
15
16
17
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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 P106 pin6 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,
640*480 (H=43.27kHz, V=85Hz)
800*600 (H=53.7kHz, V=85Hz)
1024*768 (H=68.67kHz, V=85Hz)
1280*1024 (H=79.97kHz, V=75Hz)
1.4 Test Display Modes & Pattern
1.4.1 Compatible Modes
Item Timing Analog Digital
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
640 x 350 @ 70 Hz, 31.5 KHz
640 x 400 @ 60 Hz, 31.5 KHz
640 x 400 @ 70 Hz, 31.5 KHz
640 x 480 @ 50 Hz, 24.7 KHz
640 x 480 @ 60 Hz, 31.5 KHz
640 x 480 @ 67 Hz, 35.0 KHz
640 x 480 @ 72 Hz, 37.9 KHz
640 x 480 @ 75 Hz, 37.5 KHz
640 x 480 @ 85 Hz, 43.3 KHz
640 x 870 @ 75 Hz, 68.9 KHz
720 x 400 @ 70 Hz, 31.5 KHz
720 x 480 @ 60 Hz, 31.5 KHz
720 x 576 @ 50 Hz, 31.3 KHz
800 x 600 @ 56 Hz, 35.1 KHz
800 x 600 @ 60 Hz, 37.9 KHz
800 x 600 @ 72 Hz, 48.1 KHz
800 x 600 @ 75 Hz, 46.9 KHz
800 x 600 @ 85 Hz, 53.7 KHz
832 x 624 @ 75 Hz, 49.7 KHz
1024 x 768 @ 50 Hz, 39.6 KHz
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