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ViewSonic VA2012w-2

VA2012wb-2

Model No. VS10859

20” Color TFT LCD Display

(VA2012w-2_VA2012wb-2_SM Rev. 1a Jun. 2006)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Service Manual

Summary of content (76 pages)

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Service Manual ViewSonic VA2012w-2 VA2012wb-2 Model No. VS10859 20” Color TFT LCD Display (VA2012w-2_VA2012wb-2_SM Rev. 1a Jun.
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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.
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TABLE OF CONTENTS 1. Precautions and Safety Notices 1 2. Specification 4 3. Front Panel Function Control Description 10 4. Circuit Description 12 5. Adjustment Procedure 25 6. Troubleshooting Flow Chart 50 7. Recommended Spare Parts List 53 8. Exploded Diagram and Exploded Parts List 58 9. Block Diagram 62 10. Schematic Diagrams 63 11.
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1. Precautions and Safety Notices 1. 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 guide line 2. Safety Check : Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit. These voltage are exposed in such areas as the associated transformer circuits . 3.
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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 .
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when assemble&disassembly bezel when assemble&disassembly bezel when assemble&disassembly bracket ViewSonic Corporation when assemble&disassembly bracket 3 Confidential - Do Not Copy VA2012w-2_VA2012wb-2
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2.
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Power Supply Transient Immunity Power Supply Line Surge Immunity Shall be able to withstand an ANSI/IEEE C62.41-1980 6000V 200 ampere ring wave transient test with no damage Shall be able to withstand 1.
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12 800 x 600 @ 60Hz, 37.9kHz Yes N/A 13 800 x 600 @ 75Hz, 46.9kHz Yes N/A 14 800 x 600 @ 72Hz, 48.1kHz Yes N/A 15 832 x 624 @ 75Hz, 49.7kHz Yes N/A 16 1024 x 768 @ 60Hz, 48.4kHz Yes N/A 17 1024 x 768 @ 70Hz, 56.5kHz Yes N/A 18 1024 x 768 @ 72Hz, 58.1kHz Yes N/A 19 1024 x 768 @ 75Hz, 60.0kHz Yes N/A 20 1280x720p 50Hz @ 37.5kHz Yes N/A 21 1280x 720p @ 60Hz, 45kHz Yes N/A 22 1280 x 1024 @ 60Hz, 63.4kHz Yes N/A 23 1280 x 1024 @ 75Hz, 79.
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AUDIO INTERFACE (SPEAKER SPECIFICATION) Line input connection 3.5 mm stereo jack Line input signal 1.
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2nd Source Panel AUO M201EW01 V.0 Type MVA Technology” Active Size 433.44 (H) x 270.90(V) Pixel Arrangement RGB Vertical Stripe Pixel Pitch 0.258 mm Glass Treatment Anti Glare (Hard coating 3H) # of Backlights 6CCFL edge-light (3 top / 3 bottom) Backlight Life 50.
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MECHANICAL Dimension (Desktop) Width 479 mm Height 423 mm Depth 216 mm Monitor Weight 5.5 kg / 12.1 lbs Dimension (Head Only / Wall Mount) Width 479 mm Height 350.5 mm Depth 62.7 mm Monitor Weight 4.9 kg / 10.
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3.
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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.
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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, audio line-in receptacle, and AC-IN are located on the back side of the cabinet. 1.3 OSD menu includes the following function; Auto Image Adjust (only active under analog input) Contrast/Brightness Audio Adjust Color Adjust Information Manual Image Adjust Setup Menu Memory Recall 1.
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2.3 Video signal connector for analog input: 15P Mini D-Sub 16 11 1 6 2 7 3 8 4 9 5 10 12 13 14 15 CN6 DB15HD 17 3. PIN MNEMONI SIGNAL 1 RV Red Video 2 GV Green Video 3 BV Blue Video 4 NC None 5 GND Ground (DDC return) 6 RG Red GND 7 GG Green GND 8 BG Blue GND 9 +5V +5V (for DDC) 10 SG Sync GND 11 NC None 12 SDA DDC Data 13 HS Horizontal Sync 14 VS Vertical Sync 15 SCL DDC Clock ELECTRICAL SPECIFICATIONS 3.1 Standard conditions Display Area 433.
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3.2.2 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. Horizontal: Sync frequency: 30~94 KHz (Analog), Vertical: Sync frequency: 50~75*Hz 3.4 Signal level and input impedance 3.4.1 Video Signal level: 0.7Vp-p Video signal. 3.4.2 Sync Signal level H/V Separate: TTL level 3.4.
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4.
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(24) Power Management and Supported Feature(s): Active Off/Very Low Power, Standard Default Color Space, Preferred Timing Mode 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.
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Active Time: 1680 pixels Blanking Time: 560 pixels Sync Offset: 104 pixels Sync Pulse Width: 176 pixels Border: 0 pixels Frequency: 65.29 KHz Vertical: Active Time: 1050 lines Blanking Time: 39 lines Sync Offset: 3 lines Sync Pulse Width: 6 lines Border: 0 lines Frequency: 59.
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______________________________________________________________________ (72-89) Detailed Timing / Descriptor Block 2: Monitor Serial Number: Q92060100001 ______________________________________________________________________ (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.
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VA2012wb -2 Analog: ______________________________________________________________________ VIEWSONIC CORPORATION EDID Version # 1, Revision # 3 DDCTest For: ViewSonic VA2012w-2 ______________________________________________________________________ EDID Block 0, Bytes 0-127 128 BYTES OF EDID CODE: 0 1 2 3 4 5 6 7 8 9 ________________________________________ 0 | 00 FF FF FF FF FF FF 00 5A 63 10 | 1C 6A 01 01 01 01 01 10 01 03 20 | 08 2B 1B 78 2E C3 15 A6 56 4A 30 | 9B 24 16 50 54 BF 40
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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.
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Vertical: Active Time: 1050 lines Blanking Time: 39 lines Sync Offset: 3 lines Sync Pulse Width: 6 lines Border: 0 lines Frequency: 59.
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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. 12V DC power from the power adapter enters the board through connector CN6. Other connectors on the board are for audio speaker and button board .The VGA cable is a signal cable that contains video signal, sync signal and DDC signal from PC VGA adapter.
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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 6.1.2 Mcu flash ROM This is an 8031 CPU core embedded micro-controller, which is design for high-performance low-cost LCD monitor control application.
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6.3 Inverter Board This is a specific inverter for VA2012 monitor 40W backlight which converters 20Vdc to drive 6 tubes cold cathode fluorescent tubes. Electrical specification described as below. 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.
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5. Adjustment 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 Timing 640 x 350 @ 70Hz, 31.
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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.
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Pattern 5 Pattern6 Pattern 7 Pattern 8 Pattern 9 ViewSonic Corporation 27 Confidential - Do Not Copy VA2012w-2_VA2012wb-2
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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.
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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.
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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.
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(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.
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(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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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-2_VA2012wb-2
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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-2_VA2012wb-2
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unlade speaker (13) take down shielding(14) tear off AL FOIL(15) tear off mylar and rubber(16) unlock bezel screw(17) ViewSonic Corporation unlock bkt L/R screw(18) 47 Confidential - Do Not Copy VA2012w-2_VA2012wb-2
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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-2_VA2012wb-2
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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-2_VA2012wb-2
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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.
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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-2_VA2012wb-2
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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-2_VA2012wb-2
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7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VA2012w-2) ViewSonic Model Number: VS10859 Serial No. Prefix: Q92 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 Accessories: PC Board Assembly: Cabinets: Cables: Documentation: Electronic Components: Hardware: Miscellaneous: Packing Material: Plastics: Rev: 1a Description POWER CORD SP-305+IS-14 3P 1.
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BOM LIST (VA2012w-2) ViewSonic Model Number: VS10859 Rev: 1a Serial No. Prefix: Q92 Item 1 2 3 4 5 6 7 8 9 10 11 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 12 N/A CC73303MD69 CAP ELEC DIP 330U 16V(+-20%,105C,8*9) GP 13 14 15 16 17 18 19 20 21 22 N/A N/A N/A N/A N/A N/A B-00004142 N/A N/A N/A CC810T1MD05 BG612000202 DFTJ05FR037 DC04725K011 AL007496D02 AL007496D29 23W0VABB009 DAW0VATB218 BEYG0014DA0 DFHD11MR001 CAP EC 1000U6.3V(+-20%,105C,8*11.
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Item 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 ViewSonic P/N DC-00006118 PL-00001806 N/A C-00004147 CB-00002602 CB-00005211 M-MS-0808-9158 P-00004161 P-00004162 M-LB-0813-0747 N/A M-LB-0813-0745 M-LB-0813-0746 N/A N/A PL-00005198 M-00004158 M-LB-0813-1043 N/A N/A A-PC-0106-0227 Ref.
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BOM LIST (VA2012wb-2) ViewSonic Model Number: VS10859 Rev: 1a Serial No. Prefix: Q93 Item 1 2 3 4 5 6 7 8 9 10 11 ViewSonic P/N 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 1LW0VAXVSW1 21W0VAMB011 31W0VASS016 DFDS15FR041 DFDS15FR076 DFHD11MR001 DFHD30MR267 DFHD08FR102 DFHD04MR132 CC647T1MD05 CC71004MD09 Description W0VA-2 LCD MONITOR(VA2012WB-2)EU GP W0VA M/B ASSY (NT68563H,W/O DVI) GP W0VA M/B S/S ASSY (NT68563H,W/O DVI) GP CONN D-SUB 15P 3R FR(P1.15,H12.55) GP CONN D-SUB 15P 3R FR(P1.15,H12.
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Item 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 ViewSonic P/N N/A N/A N/A E-00005214 E-00006103 N/A N/A N/A N/A E-00004154 N/A N/A DC-00006118 PL-00001806 N/A C-00004165 CB-00002602 CB-00005211 P-00004159 P-00004161 P-00004162 M-LB-0813-0747 N/A M-LB-0813-0745 M-LB-0813-0746 N/A N/A PL-00005198 M-00004158 M-LB-0813-1043 N/A N/A A-PC-0106-0227 Ref.
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8.
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EXPLODED PARTS LIST (VA2012w-2) ViewSonic Model Number: VS10859 Rev: 1a Serial No.
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EXPLODED PARTS LIST (VA2012wb-2) ViewSonic Model Number: VS10859 Rev: 1a Serial No.
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Packing for Shipping PACKING PART LIST (VA2012w-2 ) ViewSonic Model Number: VS10859 Rev: 1a 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-00006119 N/A P-00004159 CB-00002602 CB-00004149 C-00004147 Ref. P/N 1LW0VAXV082 HBW0VA01019 HBW0VA02015 HGW0VA07011 DM33T181004 HFW0VA08017 HCL7VC019011 HAL0T002019 DDL7VDPC005 DD0L0TPC007 38W0VABS010 Location VA2012w-2 monitor END CAP (L) END CAP (R) USER'S MANUAL & CD POWER CORD 3P 1.
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ViewSonic Corporation +20V VGA-SDA 62 Confidential - Do Not Copy AC 90-264V Key Pad EEPROM 24LC16 INVERTER ON/OFF BL-ON INVERTER HV +12V STEP DOWN CONVERTER Mcu NT 68F633L (12MHz) X'TAL SCALAR NT68563HF BL-BRIGHT BOARD ADJ Power Board CSL SDA DVI-SCL DVI-SDA VGA-SCL CSL DVI-SCL MCU-VDD(+3.3V) SDA DVI-SDA MCU-VDD(+3.3V) DVI I/P VGA-SCL RSTN VGA-SDA +1.8V REFCLKI VGA I/P +3.3V +5V LCD-ON LDO LDO LDO PHONE JACK VOLUME STANDBY MUTE SI9435 +5V LVDS MCU-VDD(+3.
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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 BI1- 5 GI1 5 GND_A VS 14 14 HS 13 13 12 12 1 D3 ZD5V6/NC R120 Tx 100/6 11 11 G 10 5 9 4 8 3 7 2 6 1 G 17 10 5 9 4 8 3 7 2 6 1 16 GND_A R3 1K/6 R119 100/6 VGA-DET 6 Rx 6 D2 BAV99/NC G1 B1 L3 BEAD 30/6 3 15 2 15 1 ADC_VAA 2 R2 4.
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1 2 1 2 1 2 ADC_VAA GND_A GND_A MCU-VDD D10 BAV99/NC MCU-VDD D11 BAV99/NC 3 D9 BAV99/NC 3 D8 BAV99/NC R9 R11 10/6 10/6 RX2RX2+ 5 5 R10 4.7K/6 R12 4.
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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- GND_A C22 C23 0.1uF/6 0.
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4.
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CN4 5 5 5 TCLK1M T3M T4M 5 5 5 5 T5M T6M TCLK2M T7M R68 10K/6/NC TCLK1M T3M T4M T6M TCLK2M T7M LCD-VDD R70 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 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 TCLK1P T3P T4P 5 5 5 TCLK1P T3P T4P 5 5 5 T5P T5P TXB2+ T6P T6P TXBC+ TCLK2P TCLK2P TXB3+ T7P T7P LCD-VDD 1841 30P GND_A 0/6/NC T0P T1P T2P R69 T0M T1M T2M 5 5 R67 5 5 +3.3V 10K/6/NC 0/6/NC +3.
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5V L13 BEAD 120/1206/NC D19 1SS355 DC 1 IS DE 2 R75 47/6 6 VCC CF 3 R76 330K/6 GND 4 1SS355 GND_A GND_A 1 C56 1uF/8 AIC1563 MMST3906 GND_A 2200pF/6 +5V 3 R78 1K/6 1% 3K/6 1% C57 Q6 2 GND_A R79 C51 0.1uF/6 4 3 2 1 D20 R77 240K/6 1% FB Q5 NDS9410A/SO 5 6 7 8 BOOST 7 Max 2.
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+5V 10K/6 R93 3 Q7 1MMBT3904 2K/62 VOLU 6K8/6 10K/6 R95 VOLUME R92 R94 6 1K/6 C72 1uF/8 R91 VCC12 +12V L22 BEAD/1206 AGND L23 BEAD 120/0805 1 2 Z0415 L_LINE R96 LIN_PC 100/6 C75 0.47uF/6 4 INL RIN_PC 100/6 R98 20K/6 C79 220pF/6 R97 C77 0.47uF/6 9 INR VAROUT_L R99 20K/6 1 2 Z0416 L24 BEAD 120/0805 0.
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11.
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MB TOP ViewSonic Corporation 71 Confidential - Do Not Copy VA2012w-2_VA2012wb-2
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MB BOTTOM ViewSonic Corporation 72 Confidential - Do Not Copy VA2012w-2_VA2012wb-2
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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 1. Precautions and Safety Notices 2. Specification 3. Front Panel Function Control Description 4. Circuit Description 5. Adjustment Procedure 6.