ViewSonic VA2012wb-1 Service Manual
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ViewSonic VA2012wb-1 Service Manual

ViewSonic VA2012wb-1 Service Manual

20” color tft lcd display
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Service Manual

ViewSonic VA2012w-1
VA2012wb-1
Model No. VS10859
20" Color TFT LCD Display
(VA2012w-1_VA2012wb-1_SM Rev. 1b Jun. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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Summary of Contents for ViewSonic VA2012wb-1

  • Page 1: Service Manual

    Service Manual ViewSonic VA2012w-1 VA2012wb-1 Model No. VS10859 20” Color TFT LCD Display (VA2012w-1_VA2012wb-1_SM Rev. 1b Jun. 2006) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...

  • Page 2: Revision History

    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.

  • Page 3: Table Of Contents

    Specification Front Panel Function Control Description Circuit Description Adjustment Procedure Troubleshooting Flow Chart Recommended Spare Parts List Exploded Diagram and Exploded Parts List Block Diagram 10. Schematic Diagrams 11. PCB Layout Diagrams ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 4: Precautions And Safety Notices

    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 or tilt the Interface Connector of the TFT Module. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 5 (14) The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit (IEC60950 or UL1950). Do not connect the CCFL to a Hazardous Voltage Circuit. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 6 Place the monitor on a clean & soft foam pad scratch the surface of panel Surface of the panel is pressed by fingers & Do not touch the surface of the polarizer . this may cause “ MURA “ ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 7 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 8 UL, cUL, FCC-B, CB, CE, NOM, TUV/GS, TUV ERGO (covers ISO13406-2 & MPRII), TCO’03, GOST-R + 20 ORIGINAL COPIES HYGIENIC, SASO, PCBC, Regulation BSMI, CCC, (PSB), (C-TICK), TUV-S, Green Mark, Energy Star, MIC, WEEE, RoHS, ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 9: Specification

    Shall be able to withstand an ANSI/IEEE C62.41- Power Supply Transient Immunity 1980 6000V 200 ampere ring wave transient test with no damage Power Supply Line Surge Immunity Shall be able to withstand 1.5 times nominal line ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 10 832 x 624 @ 75Hz, 49.7kHz 1024 x 768 @ 60Hz, 48.4kHz 1024 x 768 @ 70Hz, 56.5kHz 1024 x 768 @ 72Hz, 58.1kHz 1024 x 768 @ 75Hz, 60.0kHz 1280 X 720 @ 50Hz 37.5kHz ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 11 Note: Power Button, Button 1, Button 2, and Mute Button must be one-shot logic operation. (i.e. there should be no cycling) Reaction Time OSD must fully appear within 0.5s after pushing Button 1 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 12 16ms (Tr=11 ms, Tf = 5 ms) (Typ) Response Time 40 ms (Tr= 25ms, Tf = 15ms) (Max) 10%-90% @ Ta=25°C G to G 8ms (Average) Panel Defects Please see Panel Quality Specifications. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 13 Dimension (Head Only / Wall Mount) Width 479 mm Height 350.5 mm Depth 62.7 mm Monitor Weight 4.9 kg / 10.78 lbs Ergonomics Tilt Up degrees minimum Tilt Down degrees Swivel Right Swivel Left ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 14 Vertical Display Size, Primary Preset Full Screen Saturation Contrast = Default Brightness = Default No visible saturation TEST PATTERN = 32-GRAY Contrast = 100% Brightness = 100% 6~8-level saturation Test pattern = 32-gray ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 15: Front Panel Function Control Description

    3. Front Panel Function Control Description ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 16: Main Menu Controls

    OSD Position allows you to move the on-screen display menus and control screens. Memory Recall returns adjustments to the original factory settings if the display is operating in a factory Preset Timing Mode listed in this user guide. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 17: Circuit Description

    Blue GND Blue GND +5V (for DDC) +5V (for DDC) Sync GND Sync GND None None DDC Data DDC Data Horizontal Sync Horizontal Sync Vertical Sync Vertical Sync DDC Clock DDC Clock ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 18: Electrical Specifications

    ELECTRICAL SPECIFICATIONS 3.1 Standard conditions Display Area 433.44 x 270.9 mm Video Signal 0.7Vpp Contrast Default Brightness Default Ambient 20 +/- 5 °C Input Warming up > 30 min Display 1680 x 1050 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 19 Analog video input: 75 ohm Digital video input: 100 ohm Sync input: > 1 k ohm Audio input: 10K ohm 4. SIGNAL CABLE: Signal cable with Mini D-Sub 15P connectors at both ends. Length: 1.8 meter. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 20 Time: 08:44:23 Date: Wed Sep 07, 2005 ______________________________________________________________________ ______________________________________________________________________ VIEWSONIC CORPORATION EDID Version # 1, Revision # 3 DDCTest For: ViewSonic VA2012wSERIES ______________________________________________________________________ ______________________________________________________________________ EDID Block 0, Bytes 0-127 128 BYTES OF EDID CODE: ________________________________________ 0 | 00 FF FF FF FF FF FF 00 5A 63...
  • Page 21 Vertical: Active Time: 1050 lines Blanking Time: 39 lines Sync Offset: 3 lines Sync Pulse Width: 6 lines Border: 0 lines Frequency: 59.95 Hz Digital Separate, Horizontal Polarity (-) Vertical Polarity (+) ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 22 Time: 08:45:59 Date: Wed Sep 07, 2005 ______________________________________________________________________ ______________________________________________________________________ VIEWSONIC CORPORATION EDID Version # 1, Revision # 3 DDCTest For: ViewSonic VA2012wSERIES ______________________________________________________________________ ______________________________________________________________________ EDID Block 0, Bytes 0-127 128 BYTES OF EDID CODE: ________________________________________ 0 | 00 FF FF FF FF FF FF 00 5A 63...
  • Page 23 800 X 600 @ 75Hz (VESA) 832 X 624 @ 75Hz (Apple,Mac II) 1024 X 768 @ 60Hz (VESA) 1024 X 768 @ 70Hz (VESA) 1024 X 768 @ 75Hz (VESA) 1280 X 1024 @ 75Hz (VESA) ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 24 Min Vertical Freq - 50 Hz Max Vertical Freq - 75 Hz Min Horiz. Freq - 30 KHz Max Horiz. Freq - 82 KHz Pixel Clock - 170 MHz Secondary GTF - Not Supported ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 25 .The analog RGB and synchronous signals are connected to NT68563 as described below: Pin Name Pin Number Red + Red - Green + Green - Blue + Blue - H sync V sync ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 26 Stand-by and mute functions. 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. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 27 Operation Input Voltage 100~240Vac, 50~60Hz Input Current <1.5A@90Vac Inrush Current <80A @ 230Vac(Cold start) OUTPUT Output Voltage Regulation +/-5% Output Ripple and Noise 300 mVp-p Rated Output Current <4.16A Turn-on Delay <3 seconds ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 28: Adjusting Procedure

    1600 x 1200 @ 75Hz, 93.8kHz 1680 x 1050 @ 60Hz, 65.3 kHz 1680 x 1050 @ 75Hz, 82.3 kHz 1920 x 1080i @ 50Hz, 56.5kHz 1920 x 1080p @ 50Hz, 62.5kHz ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 29 Full black Full black Pattern 7 5-cycle pattern 5-cycle pattern Check the BU Pattern 8 1-dot pattern 1-dot pattern Check the flicker Pattern 9 Pattern 1 Pattern2 Pattern 3 Pattern4 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 30 Pattern 5 Pattern6 Pattern 7 Pattern 8 Pattern 9 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 31: Osd Function Menu

    Press the [1] button to exit the currently highlighted item. 5) User Color Item Press the [2] button to enter the user color page. Press the [1] button to exit the page. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 32 Press the [1] button to exit the page. Press “[▲]” Button to increase image sharpness. Press “[▼]“ Button to decrease image sharpness. (8) Setup Menu Page: Press the [2] button to enter the setup menu page. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 33 Press the [▲] button to highlight the previous option or the [▼] button to highlight the next option. Press the [2] button to select the highlighted option. Press the [1] button to exit the page. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 34 Press the [▲] button to increase the brightness. Press the [▼] button to decrease the brightness. Press the [2] button to enter the contrast adjustment page. Press the [1] button to exit the page. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 35 Press the [2] button to enter the setup menu 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. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 36 Press the [2] button to select the highlighted option. Press the [1] button to exit the page. (8) Memory Recall Page Press the [2] button to execute the memory recall function. ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 37 [2] button to enter Burn Mode. When Installing a New Main Board 1. Enter Factory Mode. 2. Use a PC or chrom to send a 32-tone gray scale signal to the monitor. 3. Select “Auto Color” ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 38 When you received a received monitor , please check whether the firmware version. If not , please following procedure to upgrade to the latest version . 1. Equipment needed : - VA2012w/b - PC ( Personal computer ) - LPT cable - Fixture (LM5ISP) - Firmware upgrade program ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 39 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 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 40 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. 0.2 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 41 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. 0.4 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 42 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 1.0 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 43 1.4 Keep default setting or press “ Change “ button for selecting the path that you want , and then press “ Next “ button to continue , see Fig 1.2 Fig 1.2 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 44 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. 1.4 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 45 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. 2.3 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 46 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. 2.5 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 47 CRC ( cyclic redundancy check ) : the host can check CRC register’s result instead of reading every byte in flash. The message of Check MCU CRC OK means that the host verify OK for the progress of program , see Fig.3.2 Fig. 3.2 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 48 LCD(1) put lcd on the desk with sponge(2) unlade I/o cover(3) unlock stand screw(4) tear off AL FOIL(6) Open back cover(5) ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 49 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 VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 50 (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 VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 51 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 52 (1) stick lcd film stick Front of PANEL (2) cover PE BAG (5) put cable&base&manual&assemble handle handle manual VGA&DVI manual CABLE VGA&DVI base (3) assemble END CAP R/L CABLE (6) accessories check&cover carton ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 53: Troubleshooting Flow Chart

    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 1.8V correct? Check Y1 Change Y1 frequency 12MHz Change M/B ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 54 Check CN7 to Change speaker speaker OK? Change power Check CN6 pin 1,2 board module 12V correct? Check U6 pin 6 Change Q7 Volume and Q7 Check U6 Change U6 pin12(mute),p11(stby) Change M/B ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 55 Display color abnormal Display color abnormal Check panel cable? Change panel cable Check open/short Repair open/short of IC2? Check panel power Change Q4 supply of heck panel Change panel Change M/B ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 56: Recommended Spare Parts List

    Remark 2: All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by ViewSonic Corporation. This is to eliminate repeated cross checks of each item between this version and prior versions.
  • Page 57 BOM LIST (VA2012w-1) ViewSonic Model Number: VS10859 Rev.: 1b Serial No. Prefix: PXC Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1LW0VAXVS72 W0VA LCD MONITOR(USA)S/B GP B-00004144 21W0VAMB002 W0VA M/B ASSY (NOVATEK 68563) GP 31W0VASS008 W0VA M/B S/S ASSY (NOVATEK 68563) GP DFDS15FR041 CONN D-SUB 15P 3R FR(P1.15,H12.55) GP...
  • Page 58 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty P-00004161 HBW0VA01019 END CAP(L) W0VA(HBW0VA01,REV3A) GP P-00004162 HBW0VA02015 END CAP(R) W0VA(HBW0VA02,REV3A) GP M-LB-0813-0747 HCL7V004013 CORE LABEL(HCL7V004,REV3A)GP HCW0VA02016 ID LABEL(S) W0VA(HCW0VA02,REV3A) GP M-LB-0813-0745 HCL7V002011 SERIAL LEBAL L7V(HCL7V002,REV3A) GP M-LB-0813-1042 HCL7V019011 CARTON LABEL L7VC(HCL7V019,REV3B) GP...
  • Page 59 BOM LIST (VA2012wb-1) ViewSonic Model Number: VS10859 Rev: 1b Serial No. Prefix: PVW Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1LW0VAXVS05 W0VA LCD MONITOR(USA) GP B-00004144 21W0VAMB002 W0VA M/B ASSY (NOVATEK 68563) GP 31W0VASS008 W0VA M/B S/S ASSY (NOVATEK 68563) GP DFDS15FR041 CONN D-SUB 15P 3R FR(P1.15,H12.55) GP...
  • Page 60 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty P-00004161 HBW0VA01019 END CAP(L) W0VA(HBW0VA01,REV3A) GP P-00004162 HBW0VA02015 END CAP(R) W0VA(HBW0VA02,REV3A) GP M-LB-0813-0747 HCL7V004013 CORE LABEL(HCL7V004,REV3A)GP HCW0VA01010 ID LABEL W0VA(HCW0VA01,REV3A) GP M-LB-0813-0745 HCL7V002011 SERIAL LEBAL L7V(HCL7V002,REV3A) GP M-LB-0813-1042 HCL7V019011 CARTON LABEL L7VC(HCL7V019,REV3B) GP...
  • Page 61 8. Exploded Diagram and Exploded Parts List ViewSonic Corporation Model Title Date Rev: ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 62 EXPLODED PARTS LIST (VA2012w-1) ViewSonic Model Number: VS10859 Rev: 1b Serial No. Prefix: PXC Item ViewSonic P/N Ref. P/N Description Q'ty B-00004144 21W0VAMB002 W0VA M/B ASSY (NOVATEK 68563) GP B-00004145 AS08B532009 PWR MODULE(DTA)EADP-64CF B,90~264V GP B-00005205 AS023360D18 INV MODULE(SEL)W0E(20V,I=6MA) GP...
  • Page 63 EXPLODED PARTS LIST (VA2012wb-1) ViewSonic Model Number: VS10859 Rev: 1b Serial No. Prefix: PVW Item ViewSonic P/N Ref. P/N Description Q'ty B-00004144 21W0VAMB002 W0VA M/B ASSY (NOVATEK 68563) GP B-00004145 AS08B532009 PWR MODULE(DTA)EADP-64CF B,90~264V GP B-00005205 AS023360D18 INV MODULE(SEL)W0E(20V,I=6MA) GP...
  • Page 64 P-00004159 HAL0T002019 PE BAG CB-00002602 DDL7VDPC005 VGA CABLE CB-00004149 DD0L0TPC007 AUDIO CABLE C-00004147 38W0VABS010 Base assy PACKING PART LIST (VA2012wb-1 ) ViewSonic Model Number: VS10859 Rev: 1b Item ViewSonic P/N Ref. P/N Location Q'ty 1LW0VAXVS05 VA2012wb monitor P-00004161 HBW0VA01019 END CAP (L)
  • Page 65 9. Block Diagram ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 66 2.2K/6/NC GGND BGND GND_A 0.1uF/6 GND_A GND_A 100/6/NC SYNC.RETURN 74LVC14 GND_A R107 GND_A VSIN 3 R108 ZD5V6 22pF/6/NC 2.2K/6/NC HSIN 3 GND_A GND_A GND_A ViewSonic Corporation ADC Input Model Title Date Rev: ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 67 RXC+ 3 10/6 TXC- RXC- 3 SHELL2 BAV99/NC GND_A GND_A BAV99/NC BAV99/NC BAV99/NC DVI Input GND_A ADC_VAA GND_A ADC_VAA GND_A ADC_VAA GND_A ADC_VAA BAV99 ViewSonic Corporation Model DVI Input Title Date Rev: ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 68 RSTn IRQn IRQn IRQn REFCLKI REFCLKI OSCI OSCO GND_A BYPASS-VS IN_VSO/GPO4 GPO1 BYPASS-VS BYPASS-HS IN_HSO/GPO5 REFCKO/GPO6 BYPASS-HS GPO7 AD0/GPO2 GPO8 AD1/GPO3 GPO9/PWM1 GPO10/PWM0 GND_A ViewSonic Corporation GND_A NT68563 Model Title Date Rev: ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 69 LEDG GND_A MUTE- LEFT- RIGHT- DOWN- PWR- SEL- MENU- GND_A GND_A GND_A GND_A GND_A GND_A GND_A GND_A ViewSonic Corporation MCU-VDD MCU-VDD MCU-VDD MCU-VDD MCU-VDD MCU-VDD MCU-VDD MCU-VDD MCU(I/O_Key) Model Title Date Rev: ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 70 Max 2.0A BEAD 120/1206 +18V +12V BEAD 120/1206/NC BEAD 120/1206/NC LCD-VDD SI9435 4.7K/6 BEAD 120/1206 2.2K/6 GND_A GND_A GND_A 4.7K/6 LCD-ON MMBT3904 2005.06.13 modify ViewSonic Corporation Model PANEL OUTPUT GND_A Title Date Rev: ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 71 LT1117/TO223/NC SSM12LL U4-A1 +1V8 CVDD1V8 MCU-VDD VOUT BEAD 120/0805 VOUT BEAD 120/0805 ADJ/GND BEAD 120/0805 ADJ/GND RB081L-20 RB081L-20 ViewSonic Corporation AIC1084/TO252/NC 330/6 1% 200/6 1% AIC1084/TO252 Scaler Power 100uF/25V Model 100uF/25V 150/6 1% 330/6 1% Title GND_A GND_A Date Rev:...
  • Page 72 330uF/16V BEAD 120/1206 MUTE MUTE TDA7496L DTC144EUA AGND L26 BEAD/1206 AGND AGND AGND GND_A R104 10K/6 R105 10K/6 BEAD/1206 STANDBY STANDBY AGND GND_A DTC144EUA AGND ViewSonic Corporation AUDIO Model Title Date Rev: ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 73: Pcb Layout Diagrams

    11. PCB Layout Diagrams MB TOP70 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 74 MB TOP ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...
  • Page 75 MB BOTTOM7 ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

  • Page 76: Adjustment Procedure

    Company: Add: Tel: Fax: E-mail: After completing this form, please return it to ViewSonic Quality Assurance in the USA at facsimile 1-909-839-7943. You may also e-mail any suggestions to the Director, Quality Systems & Processes (marc.maupin@viewsonic.com) ViewSonic Corporation VA2012w-1_VA2012wb-1 Confidential - Do Not Copy...

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