Service Manual ViewSonic VA2012w-1 VA2012wb-1 Model No. VS10859 20” Color TFT LCD Display (VA2012w-1_VA2012wb-1_SM Rev. 1b Jun.
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.
TABLE OF CONTENTS 1. Precautions and Safety Notices 1 2. Specification 5 3. Front Panel Function Control Description 12 4. Circuit Description 14 5. Adjustment Procedure 25 6. Troubleshooting Flow Chart 50 7. Recommended Spare Parts List 53 8. Exploded Diagram and Exploded Parts List 55 9. Block Diagram 59 10. Schematic Diagrams 60 11.
1. Precautions and Safety Notices 1. Appropriate Operation (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) Turn off the product before cleaning. Use only a dry soft cloth when cleaning the LCD panel surface. Use a soft cloth soaked with mild detergent to clean the display housing. Use only a high quality, safety approved AC/DC power cord. Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist or 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.
Handing and Placing Methods incorrect method Take out the monitor by grasping the LCD panel. That may cause “ MURA“. correct method Take out the monitor with cushion Place the monitor on a clean & soft foam pad could scratch the surface of panel Do not touch the surface of the polarizer .
when assemble&disassembly bezel when assemble&disassembly bezel when assemble&disassembly bracket ViewSonic Corporation when assemble&disassembly bracket 4 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
2. Specificationtion INTRODUCTION FEATURES TFTLCD PANEL (QDI) TFTLCD PANEL (AUO) M201EW01 V.0 Input Signal Sync Compatibility Compatibility Power Voltage Power Consumption Audio Ergonomics OSD Control Dimension Weight Operating Condition Storage Condition Regulation ViewSonic Corporation VA2012w/wb-1 20.1” WIDE 300 / 240 cd/㎡ 600:1 / 400:1 16.2 M colors 8 /12 ms 140 ° / 125 ° 1680 X 1050@60Hz 20.1” WIDE 300 / 240 cd/㎡ 800:1 / 400:1 16.
GENERAL specification Test Resolution & Frequency Test Image Size Contrast and Brightness Controls “1680 X 1050” @ 60Hz Full Size Factory Default: Contrast = 70%, Brightness = 100% VIDEO INTERFACE Analog Input Connector Digital Input Connector Default Input Connector Video Cable Strain Relief Video Cable Connector DB-15 Pin out Video Signals Video Impedance Maximum PC Video Signal Maximum Mac Video Signal Sync Signals DDC 1/2B Sync Compatibility Video Compatibility Resolution Compatibility Exclusions DB-
Power Supply Missing Cycle Immunity Power Supply Acoustics US Type Power Cable European Type Power Cable Power Saving Operation(Method) Power Consumption Recovery Time voltage for one cycle with no damage Shall be able to function properly, without reset or visible screen artifacts, when ½ cycle of AC power is randomly missing at nominal input The power supply shall not produce audible noise that would be detectable by the user.
21. 22. 23. 24. 25. 26. 27. 28. 1280x 720 @ 60Hz, 45kHz 1280 x 1024 @ 60Hz, 63.4kHz 1280 x 1024 @ 75Hz, 79.97kHz 1600 x 1200 @ 60Hz, 75kHz 1600 x 1200 @ 70Hz, 87.5kkHz 1600 x 1200 @ 75Hz, 93.8kHz 1680 x 1050 @ 60Hz, 65.3 kHz 1680 x 1050 @ 75Hz, 82.
TFT LCD PANEL Panel Characteristics : 1st Source Panel e Type Active Size Pixel Arrangement Pixel Pitch GLASS TREATMENT # OF BACKLIGHTS BACKLIGHT LIFE Luminance – Condition: CT = 6500K, Contrast = Max, Brightness = Max Brightness Uniformity Contrast Ratio Color Depth Viewing Angle (Horizontal) VIEWING ANGLE (VERTICAL) Response Time 10%-90% @ Ta=25°C Panel Defects 2nd Source Panel Type Active Size Pixel Arrangement Pixel Pitch GLASS TREATMENT # OF BACKLIGHTS BACKLIGHT LIFE Luminance – Condition: CT = 6500K,
IMAGE PERFORMANCE Factory Defaults Item Contrast Brightness Volume Color Temperature Sharpness OSD H. Position Defaults 70% 100% 50% 6500K 1 50% Display Size Horizontal Display Size, Primary Preset Vertical Display Size, Primary Preset Saturation Contrast = Default Brightness = Default TEST PATTERN = 32-GRAY Contrast = 100% Brightness = 100% Test pattern = 32-gray Item OSD V.
IMAGE PERFORMANCE Factory Defaults Item Contrast Brightness Volume Color Temperature Sharpness OSD H. Position Defaults 70% 100% 50% 6500K 1 50% Display Size Horizontal Display Size, Primary Preset Vertical Display Size, Primary Preset Saturation Contrast = Default Brightness = Default TEST PATTERN = 32-GRAY Contrast = 100% Brightness = 100% Test pattern = 32-gray ViewSonic Corporation Item OSD V.
3.
Main Menu Controls Adjust the menu items shown below by using the up and down buttons. A. 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. B.
4. Circuit Description 1. Outline 1.1 Power On/Off, (2) Enter button, up arrow button, down arrow button, (1) MENU button, Volume “+” button, Volume “-“button and Mute button on the front panel. 1.2 D-sub 15pin connector, DVI-D connector, audio line-in receptacle, and AC-IN are located on the back side of the cabinet. 1.
2.4 Video signal connector for digital input: 24pin DVI-D connector CN9 RX2RX2+ GND RX4RX4+ SCL SDA VS RX1RX1+ GND RX3RX3+ 5V GND HP RX0RX0+ GND RX5RX5+ GND RXC+ RXC- Pin No. 3. RX2- TMDS negative differential input, channel 2 2 RX2+ TMDS positive differential input, channel 2 3 GND Logic Ground 4 RX4- Reserved. No connection 5 RX4+ Reserved. No connection 6 SCL DDC2B Clock 7 SDA DDC2B Data 8 VS Reserved.
3.2 POWER 3.2.1 Power supply Input voltage 100~240Vac Power frequency 50~60Hz Input current 3.2.2 <1.5Arms@90Vac Inrush current 80A(Max) at 230Vac(cold start) Power consumption 47W(typical);50Watts(Max) Power Management State Power Indicator On 47Watts Blue Standby < 2Watts Amber Off <2Watts Off 3.3 Acceptable timing If the timing is within following specification, this LCD display can automatically function with a certain position.
5. EDID data 5.1.
Display Type = R/G/B Color (25-34) CHROMA INFO: Red X - 0.651 Green X - 0.289 Blue X - 0.141 White X - 0.313 Red Y - 0.336 Green Y - 0.608 Blue Y - 0.087 White Y - 0.
______________________________________________________________________ (72-89) Detailed Timing / Descriptor Block 2: Monitor Serial Number: PVW050100001 ______________________________________________________________________ (90-107) Detailed Timing / Descriptor Block 3: Monitor Range Limits: Min Vertical Freq - 50 Hz Max Vertical Freq - 75 Hz Min Horiz. Freq - 30 KHz Max Horiz.
30 | 9B 24 16 50 54 BF EF 80 B3 0F 40 | A9 40 90 4F 90 40 81 80 81 40 50 | 71 4F 31 0A 21 39 90 30 62 1A 60 | 27 40 68 B0 36 00 B1 0F 11 00 70 | 00 1C 00 00 00 FF 00 50 56 57 80 | 30 35 30 31 30 30 30 30 31 0A 90 | 00 00 00 FD 00 32 4B 1E 100 | 00 0A 20 20 20 20 20 20 00 00 110 | 00 FC 00 56 41 32 30 31 32 77 120 | 53 45 52 49 45 53 01 0E 52 11 _____________________________________________________________
(37) Manufacturer's Reserved Timing: 1152 X 870 @ 75Hz (Apple,Mac II) (38-53) Standard Timing Identification: 1680 X 1050 @75Hz 1600 X 1200 @60Hz 1400 X 1050 @75Hz 1400 X 1050 @60Hz 1280 X 1024 @60Hz 1280 X 960 @60Hz 1152 X 864 @75Hz 640 X 400 @70Hz ______________________________________________________________________ (54-71) Detailed Timing / Descriptor Block 1: 1680x1050 Pixel Clock: 146.
______________________________________________________________________ (108-125) Detailed Timing / Descriptor Block 4: Monitor Name: VA2012wSERIES (126) Extension EDID Block(s): 1 (127) CheckSum OK Time: Date: 08:45:59 Wed Sep 07, 2005 6. THEORY OF OPERATION This section describes the function of the LCD monitor per functional block. This monitor includes MB board, power board, Inverter board and button board. 6.1 MB BOARD The MB board is a two-layer, single-landed.
d) Internal OSD: Internal SRAM allows up to 2048 characters, with programmable OSD frame size. Width is 64 columns, and Height is 32 row. e) On chip TMDS receiver: The NT68563HF integrated TMDS receiver, which operates up to 165MHz and can directly connect to all DVI compliant TMDS transmitters. The TMDS signals are connected to NT68563HF as described bellow: Pin Name Pin NO. TX0+ 9 TX0- 8 TX1+ 6 TX1- 5 TX2+ 3 TX2- 2 TXC+ 11 TXC- 12 6.1.
6.3.1 Inverter Electrical specification described as below. INPUT OUTPUT Rated Input Voltage 20Vdc Input Voltage Range 18.5~21.5Vdc Input Current <2A Off state Input Power <0.1W On / off control Voltage 2~5.25 for on, 0~0.2 for off Rated Output Strike-on Voltage 1500~2000Vrms Rated Output Voltage 710Vrms at 6mA Rated Output Frequency 40~50KHz Rated Output Current 6~7mA 6.
5. Adjusting Procedure 1. Function test (1) Test equipment Color video signal and pattern generator (or PC with SXGV resolution) (2) Test condition Before function testing and alignment, the unit must warm up for at least 30 minutes under the following conditions: 1. Room temperature 2. With full-white screen , RGB , black pattern 3. with cycled display modes. 2. Test display modes Item 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
3. Test pattern Item 1 Test condition Frequency & performance Pattern Cross-hatch pattern 2 Monitor saturation 16-gray scale pattern 3 RGB color performance RGB color 4 Sub-pixel defect RGB color 5 Full white Full white 6 7. 8.
Pattern 5 Pattern6 Pattern 7 Pattern 8 Pattern 9 ViewSonic Corporation 28 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
OSD Function Menu A. When in Analog Input Mode 1. Main Menu Press the [1] (Menu) button to enter the Main Menu: Press the [▲] button to highlight the previous item or the [▼] button to highlight the next item. Press the [1] (Menu) button to exit the Main Menu. (1) Auto Image Adjust Page: Press the [2] button to execute the auto image adjust function. Press the [1] button to exit the page. (2) Contrast/Brightness Page: Press the [2] button to enter the contrast adjustment page.
Red, Green, Blue Options: Press the [2] button to cycle among the colors. Press the [1] button to exit the page. Press the [▲] button to increase the selected color level. Press the [▼] button to decrease the selected color level. (6) Information Page: Press the [2] button to enter the information page. Press the [1] button to exit the information page. (7) Manual Image Adjust Page: Press the [2] button to enter the manual image adjustment page. Press the [1] button to exit the page.
Press the [1] button to exit the page. Press the [▲] button to highlight the previous item or the [▼] button to highlight the next item. 1) Language Select Item Press the [2] button to enter the language selection page. Press the [1] button to exit the page. Press the [▲] button to highlight the previous item or the [▼] button to highlight the next item. English, French… Option Press the [2] button to select the language. Press the [1] button to exit the page.
(9) Memory Recall Page Press the [2] button to execute the memory recall function. Press the [1] button to exit the page. 2. Other Menu: This “shortcut” menu is directly accessible without bringing up the OSD. (1) Contrast Dialog Press the [▲] or [▼] button to enter the Contrast Dialog. Press the [1] button to exit the Contrast Dialog. Press the [2] button to enter the Brightness Dialog. Press the [▲] button to increase the contrast. Press the [▼] button to decrease the contrast.
(3) Input Select Page: Press the [2] button to switch to analog input mode. (4) Audio Adjust Page: Press the [▲] button to increase the volume. Press the [▼] button to decrease the volume. Press the [2] button to enable or disable mute function . Press the [1] button to exit the page. (4) Color Adjust Page: Press the [2] button to enter the color adjustment page. Press the [1] button to exit the page. Press the [▲] button to highlight the previous item or the [▼] button to highlight the next item.
1) Language Select Item Press the [2] button to enter the language selection page. Press the [1] button to exit the page. Press the [▲] button to highlight the previous item or the [▼] button to highlight the next item. English, French… Option Press the [2] button to select the language. Press the [1] button to exit the page. 2) Resolution Notice Item Press the [2] button to enter the resolution notice page. Press the [1] button to exit the page.
Press the [1] button to exit the page. 2. Other Menu: This “shortcut” menu is directly accessible without bringing up the OSD. (1) Contrast Dialog Press the [▲] or [▼] button to enter the Contrast Dialog. Press the [1] button to exit the Contrast Dialog. Press the [2] button to enter the Brightness Dialog. Press the [▲] button to increase the contrast. Press the [▼] button to decrease the contrast. (2) Brightness Dialog Press the [▲] or [▼] button to enter the Brightness Dialog.
Firmware updates procedure: When you received a received monitor , please check whether the firmware version. procedure to upgrade to the latest version . If not , please following 1.
2. Connection : To PC To Monitor Appendix A : How to install the software for ISP : 0. To setup ISP environment : Hardware: PC or notebook, parallel(printer) cable, ISP tooling. Software: If OS was Win2000 or WinXP , please install “PORT95NT.exe” In order to ensure can execute ISP program, please set BIOS in PC or Notebook as Fig 0.0 Fig 0.
0.1 Double-click the “ PORT95NT.exe” in Windows & install the program. , see Fig 0.1 Fig 0.1 0.2 Keep on press “ Next “ 4 times to go through the installation processes, see Fig. 0.2 Fig. 0.
0.3 Choose “ Typical “ then press “ Next “ , see Fig. 0.3 Fig. 0.3 0.4 Keep on press “ Next “ 4 times to go through the installation processes, see Fig. 0.4 Fig. 0.
0.5 Install completed , restart the PC or notebook. See Fig 0.5 Fig. 0.5 1. Install ISP 1.1 User could download ISP driver and PORT95NT install from Myson Century website (www.myson.com.tw ) 1.2 After extracting the ZIP file , the total files list as Fig 1.0 , and double click the file of setup.exe to install. Fig 1.
1.3 Press “ Next “ button to continue., see Fig 1.1 Fig 1.1 1.4 Keep default setting or press “ Change “ button for selecting “ button to continue , see Fig 1.2 the path that you want , and then press “ Next Fig 1.
1.5 Press “ Install “ button to continue , see Fig 1.3 Fig. 1.3 1.6 Installation has finished , press “ Finish “ button , see Fig 1.4 Fig. 1.
Appendix B : How to use software to upgrade the BIOS : 2.1 After installation , we could find the shortcut in the setting path or the program bar ( default setting ) , see Fig 2.1 Fig. 2.1 2.2 Security file is a key to use ISP function , press “ OK “ button , see Fig 2.2 Fig. 2.2 2.3 The warning is used to remind user of that different CPU rate may cause ISP function fail. (it’s limited by IIC protocol ) , press “ OK “ button , see Fig 2.3 Fig. 2.
2.4 Press “ Create Security File “ button to key in Security code . Adjusting bar to decrease speed of IIC bus , See Fig. 2.4 . Fig. 2.4 2.5 Fig 2.5 shows the setting for security code of software ISP . it needs 2 command No. and key in command sequentially for 7C , 4C , 77. The command No. and command must be set by user while coding. About the detailed of setting , please refer to section 6 boot code of ISP . Fig. 2.
Appendix C : Use ISP to program MCU 3.1 Select MTV type first , load the binary or intel hex file that you want to program into the MCU , and select “ AUTO” item , then press “ RUN “ button , see fig3.1 Fig. 3.1 3.2 3.3 If user change the MTV type , it must load file again , or the buffer of load file will be cleared . CRC ( cyclic redundancy check ) : the host can check CRC register’s result instead of reading every byte in flash.
dis-assembly procedure take out LCD(1) put lcd on the desk with sponge(2) unlade I/o cover(3) unlock stand screw(4) Open back cover(5) tear off AL FOIL(6) ViewSonic Corporation 45 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
pull out CCFT CABLE(7) unlock shielding screw(8) tear off yellow tape and pull out lvds cable(9) tear off yellow tape(10) unlock button/b screw(11) pull out button/b cable from button/b connector(12) ViewSonic Corporation 46 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
unlade speaker (13) take down shielding(14) tear off AL FOIL(15) tear off mylar and rubber(16) unlock bkt L/R screw(18) unlock bezel screw(17) ViewSonic Corporation 47 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
unlock pcb'a screw and reclaim mylar(19) take out pcb'a(20) pull out cable from pcb'a(21) ViewSonic Corporation 48 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
Packing for shipping procedure packing method (1) stick lcd film (4) put lcd in carton stick 1-1 1-2 Front of PANEL (2) cover PE BAG (5) put cable&base&manual&assemble handle handle manual VGA&DVI CABLE manual VGA&DVI CABLE (3) assemble END CAP R/L base (6) accessories check&cover carton ViewSonic Corporation 49 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
6. Troubleshooting Flow Chart No Power No Power Check CN6 pin 1,2 Change power 12V correct? board Check U4,U3 pin2 Change U3,U4 3.3V correct? Check U5 pin 2 Change U5 1.
No Audio No Audio Output OK NO Check input signal J1 OK? Check input source or change J1 OK Check CN7 to NO Change speaker NO Change power board module NO Change Q7 NO Change U6 speaker OK? OK Check CN6 pin 1,2 12V correct? OK Check U6 pin 6 Volume and Q7 OK Check U6 pin12(mute),p11(stby) OK Change M/B ViewSonic Corporation 51 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
Display color abnormal Display color abnormal NO Check panel cable? Change panel cable OK NO Check open/short of IC2? Repair open/short OK NO Check panel power supply of Q4 Change Q4 OK NO Check panel Change panel OK Change M/B ViewSonic Corporation 52 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VA2012w-1) ViewSonic Model Number: VS10859 Serial No.
BOM LIST (VA2012w-1) ViewSonic Model Number: VS10859 Rev.: 1b Serial No. Prefix: PXC Item 1 2 3 4 5 6 7 8 9 10 11 12 13 ViewSonic P/N N/A B-00004144 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Ref. P/N 1LW0VAXVS72 21W0VAMB002 31W0VASS008 DFDS15FR041 DFDS15FR076 DFDI30FR022 DFDI30FR103 DFHD11MR001 DFHD30MR267 DFHD08FR102 DFHD04MR132 CC647T1MD05 CC71004MD09 Description W0VA LCD MONITOR(USA)S/B GP W0VA M/B ASSY (NOVATEK 68563) GP W0VA M/B S/S ASSY (NOVATEK 68563) GP CONN D-SUB 15P 3R FR(P1.15,H12.
Item 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 ViewSonic P/N P-00004161 P-00004162 M-LB-0813-0747 N/A M-LB-0813-0745 M-LB-0813-1042 P-00004160 N/A PL-00005198 M-00004158 M-LB-0813-1043 N/A N/A DC-00003536 A-PC-0106-0224 CB-00003440 N/A Ref.
BOM LIST (VA2012wb-1) ViewSonic Model Number: VS10859 Rev: 1b Serial No. Prefix: PVW Item 1 2 3 4 5 6 7 8 9 10 11 12 13 ViewSonic P/N N/A B-00004144 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Ref. P/N 1LW0VAXVS05 21W0VAMB002 31W0VASS008 DFDS15FR041 DFDS15FR076 DFDI30FR022 DFDI30FR103 DFHD11MR001 DFHD30MR267 DFHD08FR102 DFHD04MR132 CC647T1MD05 CC71004MD09 Description W0VA LCD MONITOR(USA) GP W0VA M/B ASSY (NOVATEK 68563) GP W0VA M/B S/S ASSY (NOVATEK 68563) GP CONN D-SUB 15P 3R FR(P1.15,H12.
Item 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 ViewSonic P/N P-00004161 P-00004162 M-LB-0813-0747 N/A M-LB-0813-0745 M-LB-0813-1042 P-00004167 N/A PL-00005198 M-00004158 M-LB-0813-1043 N/A N/A DC-00003536 A-PC-0106-0224 CB-00003440 N/A Ref.
8.
EXPLODED PARTS LIST (VA2012w-1) ViewSonic Model Number: VS10859 Rev: 1b Serial No.
EXPLODED PARTS LIST (VA2012wb-1) ViewSonic Model Number: VS10859 Rev: 1b Serial No.
Packing for Shipping PACKING PART LIST (VA2012w-1 ) ViewSonic Model Number: VS10859 Rev: 1b Item 1 2 3 4 5 6 7 8 9 10 11 ViewSonic P/N N/A P-00004161 P-00004162 N/A A-00003642 P-00004160 N/A P-00004159 CB-00002602 CB-00004149 C-00004147 Ref. P/N 1LW0VAXVS99 HBW0VA01019 HBW0VA02015 HGW0VA06015 DM33T181004 HFW0VA03015 HCL7VC019011 HAL0T002019 DDL7VDPC005 DD0L0TPC007 38W0VABS010 Location VA2012w monitor END CAP (L) END CAP (R) USER'S MANUAL & CD POWER CORD 3P 1.
ViewSonic Corporation +20V VGA-SDA 62 Confidential - Do Not Copy AC 90-264V Key Pad EEPROM 24LC16 INVERTER ON/OFF POWER CSL SDA DVI-SCL DVI-SDA VGA-SCL CSL DVI-SCL BOARD ADJ X'TAL SCALAR NT68563HF INVERTER HV +12V Mcu NT 68F633L (12MHz) BL-BRIGHT BL-ON MCU-VDD(+3.3V) SDA DVI-SDA MCU-VDD(+3.3V) DVI I/P VGA-SCL RSTN VGA-SDA +1.8V STEP DOWN CONVERTER REFCLKI VGA I/P +3.3V +5V LCD-ON PHONE JACK VOLUME STANDBY MUTE SI9435 +5V MCU-VDD(+3.3V) CVDD1V8(+1.8V) +3.
10. Schematic Diagrams 1 2 ADC_VAA GND_A D1 BAV99/NC L1 BEAD 30/6 3 B1 R122 100/6/NC R1 75/6 RX 0/6 BI1- 3 GND_A VGA-5V CN1 D-SUB-Female VS 14 14 HS 13 1 D3 ZD5V6/NC 4 R120 Tx 100/6 13 12 12 11 11 G 10 5 9 4 8 3 7 2 6 1 G 1 GND_A R3 1K/6 R119 100/6 VGA-DET 4 Rx 4 D2 BAV99/NC G1 B1 L3 BEAD 30/6 3 15 2 15 ADC_VAA 17 10 5 9 4 8 3 7 2 6 1 16 2 R2 4.
1 2 1 2 1 1 GND_A GND_A MCU-VDD MCU-VDD 3 3 D11 BAV99/NC R9 R11 10/6 10/6 RX2- 3 RX2+ 3 R10 4.7K/6 R12 4.
VGA_3V3 0.047uF/6 22 SOGI1 R26 R27 75/6 100/6 C18 C19 0.047uF/6 0.047uF/6 23 24 GIN1+ GIN1- R28 R29 75/6 100/6 C20 C21 0.047uF/6 0.047uF/6 25 26 RIN1+ RIN1- 0.1uF/6 0.
MCU-VDD MCU-VDD 4.7K/6 MUTE 7 PANEL_SEL2 R118 10K/6/NC MUTE PANEL_SEL1 R116 10K/6/NC +5V R114 10K/6/NC +5V 6 BL-ON R117 10K/6 R32 4.7K/6 R115 10K/6 R113 10K/6 R31 MCU-VDD PANEL_SEL3 MCU-VDD IC3 + C37 GND_A 0.
CN4 3 T0M 3 T1M 3 T2M TCLK1M T3M T4M 3 T5M 3 T6M 3 TCLK2M 3 T7M R68 T6M TCLK2M T7M 10K/6/NC LCD-VDD R70 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 T0P T1P T2P 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 T0P 3 T1P 3 T2P 3 TCLK1P T3P T4P T5P T5P 3 TXB2+ T6P T6P 3 TXBC+ TCLK2P TCLK2P 3 R67 TXB3+ T7P T7P 3 LCD-VDD 1841 30P 0/6/NC TCLK1P 3 T3P 3 T4P 3 GND_A GND_A +3.3V 10K/6/NC 0/6/NC 3 TCLK1M 3 T3M 3 T4M +3.
L13 BEAD 120/1206/NC D19 1SS355 GND_A GND_A 0/1206 C50 330uF/16V/NC 2 0/1210/NC C49 0.1uF/6/NC R75 47/6 CF 3 R76 330K/6 GND 4 AIC1563 1SS355 3K/6 1% GND_A C57 +5V MMST3906 GND_A R79 Q6 2 R78 1K/6 1% GND_A GND_A C51 0.1uF/6 4 3 2 1 D20 1 FB DE 2200pF/6 3 VCC 5 1 2 R77 240K/6 1% IS 6 DC C56 1uF/8 Max 2.
+5V R95 Q7 MMBT3904 2K/62 VOLU VCC12 1 4 VOLUME 6K8/6 10K/6 R93 10K/6 R94 R92 C72 1uF/8 1K/6 3 R91 +12V L22 BEAD/1206 VS 1 5 4 3 2 ZD005D100 L23 BEAD 120/0805 2 Z0415 1 L_LINE R96 100/6 C75 LIN_PC 0.47uF/6 4 R97 RIN_PC 100/6 R98 20K/6 C77 0.47uF/6 9 INR 0.
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MB TOP ViewSonic Corporation 71 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
MB BOTTOM7 ViewSonic Corporation 72 Confidential - Do Not Copy VA2012w-1_VA2012wb-1
* Reader’s Response* Dear Readers: Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our products. We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation. Assessment A. What do you think about the content of this Service Manual? Unit Excellent Good Fair Bad 1. Precautions and Safety Notices 2. Specification 3. Front Panel Function Control Description 4. Circuit Description 5. Adjustment Procedure 6.
