Service Manual ViewSonic VA912/b-3 Model No. VS10931 19” Color TFT LCD Display ( VA912/b- 3_SM Rev. 1a Oct.
Copyright Copyright © 2005 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any m eans, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation.
1. Precautions and Safety Notices 1 2. Specification 5 3. Front Panel Function Control Description 10 4. Circuit Description 16 5. Adjustment Procedure 18 6. Troubleshooting Flow Chart 42 7. Recommended Spare Parts List 48 8. Exploded Diagram and Exploded Parts List 53 9. Block Diagram 55 10. Schematic Diagrams 56 11.
1. Precautions and Safety Notices 1. Appropriate Operation (1) Turn off the product before cleaning. (2) Use only a dry soft cloth when cleaning the LCD panel surface. (3) Use a soft cloth soaked with mild detergent to clean the display housing. (4) Use only a high quality, safety approved AC/DC power cord. (5) Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
bend the TFT Module even momentarily. When designing the enclosure, it should be taken into consideration that no bending/twisting forces may be applied to the TFT Module from outside. Otherwise the TFT Module may be damaged. (12) The cold cathode fluorescent lamp in the LCD contains a small amount of mercury. Please follow local ordinances or regulations for disposal. (13) The LCD module contains a small amount of materials having no flammability grade.
Correct methods : Incorrect Methods : Only touch the metal-frame of the panel or the front cover Surface of the panel is pressed by fingers & this may of the monitor. cause “ MURA “ Do not touch the surface of the polarizer . Take out the monitor with cushion Take out the monitor by grasping the LCD panel. That may cause “ MURA“.
Correct Methods : Incorrect Methods : Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects .
2. Specification 2-1General Specifications Test Resolution & Frequency 1280x1024 @ 60Hz Test Image Size Full Size Factory Default: Contrast and Brightness Controls Contrast = 70%, Brightness = 100% 2.
2-3 POWER SUPPLY Power Supply (Adapter) Part Number: 27-D003115 Input Voltage Range 100 TO 240 VAC Input Frequency Range 50 TO 60 HERTZ Short Circuit Protection Output can be shorted without damage Over Current Protection 3.3~4.5 A typical at 5 VDC Leakage Current 3.5 mA (Max) at 254VAC / 60Hz EFFICIENCY 80 % typical at 115 VAC Full Load Fuse Internal and not user replaceable Power Dissipation 58 (Max) Watt Max Input AC Current 1.
ACTIVE OFF < 2 W Recovery Time 2-4 ON MODE = N/A, ACTIVE OFF < 3 SEC ELECTRICAL REQUIREMENT Horizontal / Vertical Frequency Horizontal Frequency 30 – 82 KHZ Vertical Refresh Rate 50 – 85* HZ. Maximum Pixel Clock 135 MHz (EDID file is 140MHz) Sync Polarity Independent of sync polarity. Timing Table Item Timing Analog Digital 1 640 x 350 @ 70Hz, 31.5kHz Yes Yes 2 640 x 400 @ 60Hz, 31.5kHz Yes* Yes 3 640 x 400 @ 70Hz, 31.5kHz Yes Yes 4 640 x 480 @ 60Hz, 31.
vertical image position should be at the center. Note2: *: The vertical image size might not be full screen. 2-5 AUDIO INTERFACE (SPEAKER SPECIFICATION) Line input connection 3.5 mm stereo jack Line input signal 1.0Vrms@1kHz Line input impedance 10k ohm Maximum power output (Electric) 2W Signal to Noise Ratio 72db Frequency response F0 -20kHz (F0 : Lowest resonant freq.) Distortion <8% THD @1kHz There should be no audible vibration with volume at Vibration 100%.
Panel Characteristics: Model number A190E3 Type TN type with RSDS interface Active Size 376.32 (H) x 301.056 (V) Pixel Arrangement RGB Vertical Stripe Pixel Pitch 0.294 mm GLASS TREATMENT Anti Glare (Hard coating 3H) # OF BACKLIGHTS 4 CCFL (L type); Edge Light BLU BACKLIGHT LIFE 50,000 Hours (min) Luminance (Center) – 280 cd/m2 (Typ after 15 minute warm up) Condition: 180 cd/m2 (M in after 15 minute warm up) CT = 6500K, Contrast = Max, Brightness = Max U = 76% (typ), 67% (M in).
3. Front Panel Function Control Description Adjusting the Screen Image Use the buttons on the front control panel to display and adjust the OSD controls which display on the screen. The OSD controls are explained at the top of the next page and are defined in “Main Menu Controls” on page 10. Main Menu with OSD controls Front Control Panel shown below in detail Scrolls through menu options and adjusts the displayed control. Also a shortcut to display the Contrast adjustment control screen.
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.
Main Menu Controls Adjust the menu items shown below by using the up S and down T buttons. Control Explanation Auto Image Adjust sizes and centers the screen image automatically. Contrast adjusts the difference between the image background (black level) and the foreground (white level). Brightness adjusts background black level of the screen image. Input Select toggles between inputs if you have more than one computer connected to the VA912/VA912b.
Control Explanation 5000K-Adds blue and green to the screen image for a darker color. User Color Individual adjustments for red (R), green (G), and blue (B). 1. To select color (R, G or B) press button [2]. 2. To adjust selected color, pressSandT. Important: If you select RECALL from the Main Menu when the product is set to a Preset Timing Mode, colors return to the 6500K factory preset.
Control Explanation Fine Tune sharpens the focus by aligning text and/or graphics with pixel boundaries. NOTE: Try Auto Image Adjust first. Sharpness adjusts the clarity and focus of the screen image. Setup Menu displays the menu shown below: Language Select allows the user to choose the language used in the menus and control screens. Resolution Notice allows the user to enable or disable this notice.
Control Explanation OSD Background allows the user to turn the OSD background On or Off. Memory Recall returns the adjustments back to factory settings if the display is operating in a factory Preset Timing Mode listed in the Specifications of this manual.
4. Circuit Description Circuit Description 1. Power supply (DC/DC Converter) The AAT1109 is a one-channel step-up PWM controller incorporating a soft-start and a short circuit protection (SCP) function. This device consists of an on-chip voltage reference, error amplifier, pulse width modulation controller, under-voltage lockout protection, soft-start, and short circuit protection circuits.
2. Micro Controller The MTV312M micro-controller is an 8051 CPU core embedded device especially tailored for CRT/LCD Monitor applications. It includes an 8051 CPU core, 1024-byte SRAM, 14 built-in PWM DACs , VESA DCC interface, 4-channel A/D converter , and a 64K-byte internal program FLASH-ROM. 3. TSU57AK The TSU57AK is a high performance, and fully integrated graphics process IC solution for LCD monitors with resolution up to SXGA.
5. Adjusting Procedure A. Function Test and Alignment Procedure 5.1 All Modes Reset You should do “All Model Reset” (Refer to Chap 3. Hot Keys for Function Controls) first. This action will allow you to erase all end-user’s settings and restore the factory defaults. 5.2 Auto Image Adjust The Auto Adjust is aimed to offer a best screen quality by built-in ASIC. For optimum screen quality, the user has to adjust each function manually. A.Turn the computer and LCD monitor on. B.
5.7 25 Gray Test Signal: 1280*1024@60Hz Test Pattern: Full Screen 25% White (Gray) Inspection Item: Particle, Line Defect & Mura 5.8 50 Gray Test Signal: 1280*1024@60Hz Test Pattern: Full Screen 50% White (Gray) Inspection Item: Bright Dot, Particle, Line Defect & Mura 5.9 White Box Test Signal: 1280*1024@60Hz Test Pattern: Window standard pattern Inspection Item: Particle, Line Defect, Power, Image Remain & Mura 5.
5.11 RED Test Signal: 1280*1024@60Hz Test Pattern: Full Screen Red Inspection Item: Bright Dot, Partial & Line Defect 5.12 Green Test Signal: 1280*1024@60Hz Test Pattern: Full Screen Green Inspection Item: Bright Dot, Partial & Line Defect 5.13 Blue Test Signal: 1280*1024@60Hz Test Pattern: Full Screen Green Inspection Item: Bright Dot, Partial & Line Defect 5.
5.15 Gray_Scale_0-100_H256 Test Signal: 1280*1024@60Hz Test Pattern: Horizontal 64(256) Gray Scale (Up → Down,From 0 to 100% White) Inspection Item: Line Defect & Function Defect 5.16 Block Window Test Signal: 1280*1024@60Hz Test Pattern: Black block at the center Inspection Item: Cross Talk & Optical Character 5.
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Figure 5 FIGURE 5 FIGURE 6 FIGURE 7 ViewSonic Corporation FIGURE 8 23 Confidential-Do Not Copy VA912/b-3
B. BIOS update procedure BIOS Update User Guide BIOS U FLOW FOR GENESIS 1.1 Program: 1. 1. 1. Software a. Please download the file “ M-Star” from CMO E-Sir system. There are ISP & BIOS two files, kindly see as below. a) ISPACK.EXE: Main program b) Ancillary .ISPACK.EXE :Description program 1.1. 2.Hardwar Point plug •D_Sub cable (15Pin) •Point plug [24Pin] D_Sub cable OR Without to affect 1.1.3 Join VGA Cable, PC BASE, see the example picture as below.
1.2 Installation: A. Please install the programs respectively as below. B. ISP & BIOS software file to be about to produce the next. (If the file existence already, needn’t to set up. C. repeat.) This system is applied to Win 95/98/NT/2000. Isp.lnk 1.3 ISP Execution 1. Settings: Double Click Isp.lnk Fig.
2. When ISP Tool executing at the first time, it is required to enter Security Data Please press , then input related information as Fig.2. 4C 7C 4C 77 For A190E3 Key in “OK” 3. Select correct Micro Controller as Fig.3.
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1.4.Verification BIOS Update whether success 5. When everything is done. Please turn off the power and restart it again. Check Factory Mode and make sure it already be updated.
C. Monitor Assembly and Disassembly 1. Separate Stand Assy 1.1 Remove Stand Cover Step 1 : Press Stand Assy’s bottom part in Seat Hinge. Step 2 : Remove Cover Hinge. Step 3 : Loose and Remove 4 screws. Step 4: Remove Stand Assy.
2. Separate Rear Cover (Rear Case Assy) Loosen and remove 5 screws. Separate Bezel hooks to take Bezel and Rear Cover apart. Step 1 : Loose and remove 2 screws. Step 2 : Separate Bezel hooks to take Bezel and Rear Cover apart. Step 3 : Remove Rear Cover.
3. Remove Power Board 3.1 Remove 2 pieces of Backlight wires. 3.2 Remove Metal Cover Step 1 : Loose and remove 4 screws. Step 2 : Loose and remove 2 screws. Step 3 : Loose and remove 4 screws.
Step 4 : Remove the Cover of X-PCB. Step 5 : Completed 3.3 Remove Power PCBA Step 1 : Insert 2 pieces of Backlight wires. Step 2 : Loose and remove 4 screws.
Step 3 : Remove Power PCBA.
4. Change New Power Board Step 1 : Insert New Power PCBA. Step 2 : Fasten 4 fixed screws of Power PCBA . Step 3 : Completed 5. Remove AD PCBA 5.1 Remove FFC Step 1 : Remove 2 FFC from AD PCBA.
Step 2 : Remove FFC 5.2 Remove AD PCBA Step 1 : Loose and remove 4 screw Step 2 : Remove AD PCBA.
Step 3 : Completed 6. Change New AD PCBA Step 1 : Place New AD PCBA. Step 2 : Fasten 4 screw. Step 3 : Insert FFC.
Step 4 : Insert 2 FFC. Step 5 : Completed 7 Remove OSD PCBA Step 1 : Remove FFC. Step 2 : Separate both Audio Cable. Step 3 : Take OSD PCBA apart.
Step 4 : Completed. 8. Change New OSD PCBA Step 1 : Place New OSD PCBA. Step 2 : Insert Audit Cable to connectors of OSD PCBA. Step 3 : Completed.
9. Add Cover to AD PCB Heatsink Step 1 : Join the cover hooks of X-PCB. Step 2 : Fasten the 4 screws. Step 3 : Fasten 2 screws. Step 4 : Fasten the 4 screws.
10. Rear Assy Assembly Step 1 : Place Rear Cover. Step 2 : Join Rear Cover with Bezel. Step 3 : Fasten 2 screws.
11. Stand Assy Assembly Step 1 : Place Stand Assy . Step 5 : Fasten 4 screws to fixed Stand Assy. Step 6 : Insert Cover Hinge. Step 7 : Place Stand Assy.
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Defect Mode Failure Analysis A Repair Testing “ Panel Chan e” Should be Performed to Level 3 Repair stage Check PCB Flicker AD/B Change P/B Change Gray value display R.G.
Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair stage ON/OF No Power Check PCB AD/B Change Abnormal P/B Change CNT/B Change Check Wire PW cable Change OSD cable Change LED display abnormal Check PCB LED Off AD/B Change LED Dark P/B Change LED Abnormal OSD cable Change LED Flicker Check Wire Power wire connector Cable change Abnormal Keyboard Check PCB Unavailable AD/B Change P/B Change Check Wire OSD cable Change NG TEST Next Step
Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair stage Abnormal BIOS Can’t Input Check PCB &OSD AD/B Change CNT/B Change Check Wire Can’t Reader Other Abnormal Display Display Shut Check PCB Down D-sub cable change AD/B Change P/B Change CNT/B Change Display flicker Check Panel Panel Change Check PCB AD/B Change (tapping ) CNT/B Change Check Panel Next Step P/B Change NG TEST Completed ViewSonic Corporation 45 Confidential-Do
u Trouble Shooting Analysis Check the information in this section to see if the problems can be solved before requesting repair. Note:The consumers are only allowed to solve the problems described as below. Any unauthorized product modification, or failure to follow instructions supplied with the product will end the warranty immediately. l No image u Make sure power button is ON. u Check whether the LCD monitor and computer power cords are plugged and whether there is a supply of power.
l u Use OSD Image Menu to adjust H_Position and V_Position. u Check image size setting. u Perform Auto Adjust. u Use OSD Color Menu to adjust color setting. Color too dark u l Dark area distorted u l Use OSD Color Menu to adjust color setting. Use OSD Color Menu to adjust color setting. White color is not white u Use OSD Color Menu to adjust color setting.
7. Recommend Spare Parts List (RSPL) RECOMMENDED SPARE PARTS LIST (VA912-3) ViewSonic Model Number: VS10931-1W Rev: 1a Serial No. Prefix: PUQ Description Ref. P/N Item ECR/ECN ViewSonic P/N Location Universal number# Adapter, Lips Without Audio, DAC-19M001 A-00004021 Accessories: 27-D003115 27-D003115 BF, Ver:00 A, 19 V/2.5 A, 5 V/3 A, 4L, 4.9 1 mA, 2380 V 32E1818018 A-00002059 Power Code, CEE, SP-023+IS-14, H05VV-F, 32E1818018 (AJ0E3H1E1F/2F) 3G, 0.
Item 24 Hardware: 25 Description ECR/ECN ViewSonic P/N Screw, M3*P0.5*4, f 5.5*2 HW-00000553 Screw, M3*P1.27*12, f 5.5*2 HW-00000556 SCREW, M4, P=0.7 mm, L=15 mm, Special HW-00002442 Thin Head, Phillips Cross Recess, Screw_with_Washer, SHYE CHING SCREW Ref. P/N 42A9930008 42A9990005 Location Universal number# 42A9930008 42A9990005 Q'ty 2000 2000 42-D000314 42-D000314 2000 42-D000649 42-D000649 2000 42A9940007 42A9940007 2000 7345511002 7345511002 1 78-D004088 (AJ0E3H1A.C.E.K.
RECOMMENDED SPARE PARTS LIST (VA912b-3) ViewSonic Model Number: VS10931-1W Rev: 1a Serial No. Prefix: PUR Description Ref. P/N Location Universal number# Item ECR/ECN ViewSonic P/N Adapter, Lips Without Audio, DAC-19M001 BF, Ver:00 A-00004021 Accessories: 27-D003115 27-D003115 A, 19 V/2.5 A, 5 V/3 A, 4L, 4.9 mA, 2380 V 1 Power Code, CEE, SP-023+IS-14, H05VV-F, 3G, A-00002059 32E1818018 32E181801 0.
BOM LIST (VA912/b-3) ViewSonic Model Number: VS10931-1W Rev: 1a Item ViewSonic P/N Ref. P/N 1 #N/A MJ0E501K01 2 #N/A L3J005XXXX Description 19" Semi Product,19E5-L01,Default 19"E5 TN PS Asahi 0.7mm glass CF Polarizer M190E5,383.15x307.85x0.215,135°,Optimax LPTHL56-T12AGA1SU TFT Polarizer M190E5,380.52x304.13x0.215,135°,Optimax LPTHL56-T12SU Driver IC,Scan,A170E1,HX8633CPD400,256Channel Driver IC,COF,Data,HX8002CB97,COF,A190E3-H&M190E5L01,384Channel ACF,AC-4251FY-16,100M/RL ACF,PCB,AC-9825R-35,100000 mmx1.
Item ViewSonic P/N Ref.
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EXPLODED PARTS LIST (VA912/b-3) ViewSonic Model Number: VS10931-1W Rev: 1a Item ViewSonic P/N Ref.
9. Block Diagram Speaker OSD Key Pad / Audio Out Audio In 3.
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V5A1 V5A 1 V5A TP VAA VAA VAA1 1 TP VGH VGH1 VGH 1 VGL 1 TP VGL VGL1 DCDC_ON/OFF TP 2 D34 CP36 1 3 QP18 RP16 RP14 D3 2 2 CP4 1 3 ZDP6 3 CP2 CP28 CP6 CP11 RP20 2 1 D2 GND_POWER CP9 2 1 CP15 CP3 RP15 VGL 1 3 CP25 RP19 GND_POWER 3 GND_POWER RP12 QP17 1 2 VAA CP1 RP31 V5A V5 LP3 FP1 V5 1 2 GND_POWER + CP17 GND_POWER QP13 DP1 1 2 2 CP16 VAA 3 CP13 LP4 CP14 1 RP48 LP5 RP49 LP6 3 RP8 RP7 GND_POWER QP2 GND_POWER 1 GND_POWER 2
V5A_ESD V5A_ESD CON1 R6 V5A 11 3 19 22 V5A 2 1 R7 18 17 10 9 2 1 13 12 5 4 21 20 23 24 2 2 D7 D5 D8 3 D4 U2 1 2 3 4 1 1 DAT0+ DAT0DAT1+ DAT1DAT2+ DAT2DAT3+ DAT3DAT4+ DAT4DAT5+ DAT5clk+ clk- R5 2 1/3shield 2/4shield 0/5shield clk shield 25 26 27 29 28 8 15 6 7 14 16 1 R G B RGB GND HSYNC VSYNC SYNC GND DDC SCL DDC SDA +5V HPD C163 NC NC NC GND VCC VCLK SCL SDA R9 R10 R11 8 7 6 5 R12 GND_POWER GND_POWER R13 R+ RG+ GB+ BCLK+ CLK- R14 R15 R16 R17 R18 R19 3 C38 C37 2
CN2 1 2 3 4 5 6 7 8 V5 GND_INV R198 V33C C162 3 R199 Q19 R200 1 2 INV_ON/OFF GND_POWER V33C R196 R195 3 V33C C30 Q18 R197 INV_ADJ 2 1 GND_POWER ViewSonic Corporation Model INVERTER I/F Title Date Confidential - Do Not Copy ViewSonic Corporation 59 VA912/b-3 Rev:
GND_POWER VCPU C172 C171 R218 R22 SDA R139 03/08/04 R140 R219 SDA1 SCL1 C46 C47 V5A 36 37 15 LED R35 43 44 35 39 38 GND_POWER 5 6 Avoid entering the self-test mode of the MCU. 4 VDD3 8 VDD HSCL/P3.0/RX HSDA/P3.1/TX P3.2/INT0 ISDA/P3.4/T0 ISCL/P3.5/T1 VBLANK/P4.0 HBLANK/P4.1 STOUT/P4.2 DA0/P5.0 DA1/P5.1 DA2/P5.2 DA3/P5.3 DA4/P5.4 DA5/P5.5 DA6/P5.6 AD0/P6.0 AD1/P6.1 AD2/P6.2/HLFHI AD3/P6.3 DA10/P6.4 DA11/P6.5 DA12/P6.6 DA13/P6.
V5A 5 6 7 8 5 6 7 8 V5A R53 4 3 2 1 R54 4 3 2 1 RP47 RP46 CN3 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LP11 MENU KEY_DOWN KEY_UP SOURCE_SELECT AUTO_ADJ 4 3 2 1 4 3 2 1 4 3 2 1 5 6 7 8 5 LP9 6 7 8 5 6 7 8 LP10 LED_G LED_O PWR_SW AUDIO_ON VOL1 OPTION1 OPTION2 4 3 2 1 4 3 2 1 V5A R179 CP34 5 6 7 8 3 5 6 7 8 Q15 3 R181 LED_O 1 2 LED_OR AUD_L AUD_R 1 Q14 2 CP33 GND_POWER V5A R214 R215 R182 AUD_L AUD_R1 1 1 R217 3 L24 1 R184 1 L23 LED_G 2 LED_GR
V33B CN4 (3-STEP) L9 XAO OE CKV VSD V33P VGH_P PANEL_VGH 3 Q8 2 C51 STV VGD PANEL_VGL 1 R55 STV XAO OE CKV GND_POWER PANEL_VGH VGD L10 R56 VGD R57 R58 VCOM C52 GVON 2 GND_POWER C54 C53 GVOFF R59 GND_POWER L12 VGL ZD1 OB2P OB2N OB1P OB1N OB0P OB0N POL STB OCLKN OCLKP GVOFF GND_POWER VGL 1 4 5 B_S Q9 3 B_D 6 A_D B_G 1 A_S VGH_P VGH A_G L11 VGH OSTH GND_POWER 2 GVON GND_POWER OG2P OG2N OG1P OG1N OG0P OG0N OR2P OR2N OR1P OR1N OR0P OR0N PANEL_VGL C55 C5
VPREF1 VPREF 1 R61 R64 GMA1 V33A1 GMA1 1 V5A R65 TP VS1 V33A 1 GMA1 U6 L15 GMA2 Vin Vout 1 GMA2 2 GMA2 R67 C71 C70 R70 GMA3 C73 C72 GMA3 1 VS3 (PANEL VCC) V33A 1 GND R66 VS2 3 V5A GMA3 R71 GND_POWER R72 V33C1 GMA4 GMA4 1 TP VS4 GMA4 U8 1 R73 L16 3 VIN GMA5 GND R74 VS5 VOUT VOUT V33C 2 4 V33C (SCALER VCC) 1 1 GMA5 GMA5 R201 C80 C79 C78 C81 R202 GMA6 GMA6 1 VS6 R203 GMA6 GND_POWER R204 VS7 GMA7 1 GMA7 V18V1 PP11 GMA7 R76
R+ RG+ GB+ BCLK+ CLK- R+ RG+ GB+ BCLK+ CLK- 40 41 43 44 46 47 49 50 52 R1 VDVI VDD 18 87 97 117 11 21 84 94 104 114 126 VPO VDDC VDDC VDDC VDDC VDDP VDDP VDDP VDDP VDDP VDDP VDDP AVDD_PLL 45 51 35 VDPLL 53 55 65 RIN0 RIN0M GIN0 GIN0M SOGIN0 BIN0 BIN0M HSYNC0 VSYNC0 AVDD_DVI AVDD_DVI 63 62 60 59 61 58 57 37 38 AVDD_MPLL RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC VPLLVDVI AVDD AVDD U1 VAD GA1P GA1N GA2P GA2N GA3P GA3N R+ RG+ GB+ BCK+ CKREX
R109 11 DDC_DAT R110 1 6 2 7 3 8 4 9 5 10 12 13 14 15 C116 R111 R113 C117 R112 R115 C118 R114 C119 R116 R117 R118 C120 BIN SOG R119 C121 RIN GIN C122 CN7 R120 C123 GNDR GND_POWER C124 R121 GNDG D22 R123 3 1 D23 D24 D26 12/15/2003 2 2 2 V5A_ESD C158 C159 GND_POWER Most of Customers Recommended.
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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 Excellent Good Fair Bad Excellent Good Fair Bad 1. Precautions and Safety Notices 2. Specification 3. Front Panel Function Control Description 4. Circuit Description 5.