ViewSonic VX912 Service Manual
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ViewSonic VX912 Service Manual

19” color tft lcd display
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Service Manual

ViewSonic VX912-1
Model No. VS10162
19" Color TFT LCD Display
(VX912_SM_836 Rev. 1b Nov. 2004)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic VX912-1 Model No. VS10162 19” Color TFT LCD Display (VX912_SM_836 Rev. 1b Nov. 2004) 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

    4. Circuit Description 5. Adjusting Procedure 6. Trouble Shooting Flow Chart 7. Recommended Spare Parts List 8. Exploded Diagram And Spare Parts List 9. Block Diagram 10. Schematic Diagrams 11. PCB Layout Diagrams Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 4: Precautions And Safety Notices

    Reflector edge softly. Otherwise the TFT Module may be damaged. (10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate nor tilt the Interface Connector of the TFT Module. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 5 (14) The LCD module is designed so that the CFL in it is supplied by Limited Current Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 6 “ 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“. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 7 Correct Methods : Incorrect Methods : Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects . That could scratch the surface of panel Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 8: Specification

    0.75mA (Max) at 264VAC / 50Hz EFFICIENCY 77 % typical at 115VAC Full Load Fuse Internal and not user replaceable Power Dissipation 35 Watts (typ) Max Input AC Current 1.2 Arms @ 90VAC, 0.7 Arms @265VAC Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 9 1024 x 768 @ 85Hz, 68.67kHz 1152 x 864 @ 75Hz, 67.5kHz 1152 x 870 @ 75Hz, 68.7kHz 1280 x 1024 @ 60Hz, 63.4kHz 1280 x 1024 @ 75Hz, 79.97kHz 1280x 720 @ 60Hz, 45kHz (HDTV) Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 10 Response Time 12 ms (Tr= 2 ms, Tf = 10 ms) (typ) 10%-90% @ Ta=25°C 25 ms (Tr= 5 ms, Tf = 20 ms) (max) Panel Defects Please see Panel Quality Specifications. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 11 Operating Relative Humidity : 20% to 90% RH Non-Condensing Storage Relative Humidity : 5% to 90% RH Non-Condensing Operating Altitude : 0 to +3,000 meters Storage Altitude : 0 to +12,000 meters Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 12: Front Panel Function Control Description

    Also toggles between two controls on some screens. Also a shortcut to toggle between analog and digital connections. Power light Green = ON Orange = Power Saving Power On/Off Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 13 • If necessary, make small adjustments using H POSITION and V POSITION until the screen image is completely visible. (The black border around the edge of the screen should barely touch the illuminated “active area” of the LCD display.) Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 14 Contrast (black level) and the foreground (white level). adjusts background black level of the screen image. Brightness allows you to toggle between an analog and a Input Select digital signal. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 15 ▼ To adjust selected color, press 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. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 16 Horizontal Size sharpens focus by aligning the illuminated text and/ Fine Tune or graphic characters. adjusts the clarity and focus of the screen image. Sharpness Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 17 Preset Timing Mode listed in this user guide. Exception: This control does not affect changes made with the User Color control, Language and Power Lock setting. Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 18: Circuit Description

    MNEMONI SIGNAL DB15HD Red Video Green Video Blue Video None Ground(DDC return) Red GND Green GND Blue GND +5V (for DDC) Sync GND None DDC Data Horizontal Sync Vertical Sync DDC Clock Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 19 3. Electrical Specifications 3.1 Standard conditions Display Area 404.2 x 330.0 mm Video Signal 0.7Vpp Contrast Max. Brightness Max. 20 +/- 5 °C Ambient Input Warming up > 30 min Display 1280 x 1024 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 20 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. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 21 Analog EDID ______________________________________________________________________ VIEWSONIC CORPORATION EDID Version # 1, Revision # 3 DDCTest For: ViewSonic VX912 ______________________________________________________________________ 128 BYTES OF EDID CODE: 0 | 00 FF FF FF FF FF FF 00 5A 63 10 | 1A 8D 01 01 01 01 01 0E 01 03...
  • Page 22 Active Time: 1024 lines Blanking Time: 42 lines Vertical: Sync Offset: 1 lines Sync Pulse Width: 3 lines Border: 0 lines Frequency: 60.02 Hz Digital Separate, Horizontal Polarity (+) Vertical Polarity (+) Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 23 Max Horiz. Freq - 82 KHz Pixel Clock - 140 MHz Secondary GTF - Not Supported ______________________________________________________________________ (108-125) Detailed Timing / Descriptor Block 4: Monitor Name: VX912 (126) No Extension EDID Block(s) (127) CheckSum OK Confidential - Do Not Copy...
  • Page 24 Time: 08:18:48 Date: Tue Jun 29, 2004 ______________________________________________________________________ VIEWSONIC CORPORATION EDID Version # 1, Revision # 3 DDCTest For: ViewSonic VX912 ______________________________________________________________________ 128 BYTES OF EDID CODE: ________________________________________ 0 | 00 FF FF FF FF FF FF 00 5A 63...
  • Page 25 Vertical: Active Time: 1024 lines Blanking Time: 42 lines Sync Offset: 1 lines Sync Pulse Width: 3 lines Border: 0 lines Frequency: 60.02 Hz Digital Separate, Horizontal Polarity (+) Vertical Polarity (+) Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 26 Max Horiz. Freq - 82 KHz Pixel Clock - 140 MHz Secondary GTF - Not Supported ______________________________________________________________________ (108-125) Detailed Timing / Descriptor Block 4: Monitor Name: VX912 (126) No Extension EDID Block(s) (127) CheckSum OK Confidential - Do Not Copy...
  • Page 27 NV_RAM (U4) SCL P5.4 Key_down P5.5 Key_right P5.3 Key_up P5.6 Key_left P6.3 Key_mute P5.1 Key_select P6.0 LED_red P6.1 LED_green P6.2 LCD panel power1 on / off control P1.0 Backlight on / off control Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 28 90~260 Vac , 47 ~ 63Hz Input Current <1.5A Inrush Current <100A@120Vac Standby Input Voltage 12Vdc Output Voltage Regulation +/-5% Output Ripple & Noise 120mVp-p Rate Output Current <3.5A Turn-on delay <3secs Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 29: Adjusting Procedure

    Red, Green, Blue Options: Press “[2]” Button to switch among the options. Press “[1]” Button to exit the options. Press “[▲]” Button to make current option high. Press “[▼]“ Button to make current option low. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 30 Press “[1]” Button to exit Language Select item. Press “[▲]” Button to the previous option or “[▼] “Bottom to the next option. English, French……..Option Press “[2]” Button to select the language. Press “[1]” Button to exit the option. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 31 Press “[▲]” or “[▼]“ Button to enter the Contrast Dialog. Press “[1]” Button to exit the Contrast Dialog. Press “[2]” Button to enter the Brightness Dialog. Press “[▲]” Button to make contrast high. Press “[▼]“ Button to make contrast low. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 32 Press “[▲]” Button to the previous item or “[▼] “Bottom to the next item. 1) sRGB Item 2) 9300K Item 3) 6500K Item 4) 5400K Item Press “[2]” Button to select current Item. Press “[1]” Button to exit current item. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 33 Press “[1]” Button to exit Resolution Notice item. Enable, Disable Option Press “[2]” Button to select the option. Press “[1]” Button to exit the option Press “[▲]”Button to the previous option or “[▼] “Bottom to the next option. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 34 Press “[▲]” or “[▼]“ to enter the Contrast Dialog. Press “[1]” Button to exit the Contrast Dialog. Press “[2]” Button to enter the Brightness Dialog. Press “[▲]” Button to make contrast high. Press “[▼]“ Button to make contrast low. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 35 Press “[2] “Button Enter Factory Menu item Then Press”[2]” Button Enter Burn Mode If Change new main board, 1. Enter Factory mode. 2. PC or chrom send 32 Gray scaler to monitor. 3. Press auto color Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 36 1024 x 768 @ 85Hz, 68.67kHz 1152 x 864 @ 75Hz, 67.5kHz 1152 x 870 @ 75Hz, 68.7kHz 1280 x 1024 @ 60Hz, 63.4kHz 1280 x 1024 @ 75Hz, 79.97kHz 1280x 720 @ 60Hz, 45kHz (HDTV) Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 37 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 Pattern 2 Pattern 3 Pattern 4 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 38 Pattern 5 Pattern 6 Pattern 7 Pattern 8 Pattern 9 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 39 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 : VX912 PC ( Personal computer ) LPT cable Fixture (LM5ISP)
  • Page 40 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 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 41 2. Double-click the “ PORT95NT.exe” in Windows & install the program. , see Fig 0.1 Fig 0.1 3. Keep on press “ Next “ 4 times to go through the installation processes, see Fig. 0.2 Fig. 0.2 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 42 4. Choose “ Typical “ then press “ Next “ , see Fig. 0.3 Fig. 0.3 5. Keep on press “ Next “ 4 times to go through the installation processes, see Fig. 0.4 Fig. 0.4 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 43 1. User could download ISP driver and PORT95NT install from Myson Century website (www.myson.com.tw 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 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 44 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 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 45 5. Press “ Install “ button to continue , see Fig 1.3 Fig. 1.3 6. Installation has finished , press “ Finish “ button , see Fig 1.4 Fig. 1.4 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 46 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 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 47 4. Press “ Create Security File “ button to key in Security code . Adjusting bar to decrease speed of IIC bus , See Fig. 2.4 . S p eed of IIC bus Securit y code Fig. 2.4 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 48 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 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 49 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 Ste p 2 Ste p 1 Ste p 3 Ste p 4 Fig. 3.1 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 50 3. 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 Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 51: Trouble Shooting Flow Chart

    6. Trouble Shooting Flow Chart 1. Display color abnormal: Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 52 2.. Monitor can not power on Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 53 3. Monitor white screen Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 54 4. Monitor black screen Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 55 5. Analog input: always shows NO SIGNAL: Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 56 6. Digital input: always shows NO SIGNAL Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 57: Recommended Spare Parts List

    7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VX912) ViewSonic Model Number: VS10162 Rev: 1c Item Description ECR/ECN ViewSonic P/N Ref. P/N Location Q'ty Accessories: VGA cable M-MS-0808-9399 DDL7VDPC005 VGA cable Board Assembly: Main Board V008(4807) B-MB-0201-2780 10MBZZZVSF3 main board...
  • Page 58 BOM LIST (VX912-1) ViewSonic Model Number: VS10162 Rev: 1b Level ViewSonic P/N Reference P/N Part Description Location #N/A 1L9VDZLVS55 L9V LCD MONITOR(L9VDR,REALTEK CHIP) B-00000456 29L9IMB0012 L9I M/B ASSY(FOR L9VD REALTEK) #N/A 39L9IDP0005 L9I M/B DIP ASSY(FOR L7VD REALTEK) #N/A AZL9VD0L008...
  • Page 59 Level ViewSonic P/N Reference P/N Part Description Location A-CD-VX910 HGL9V001013 USER MANUAL &CD ROM L9V(HGL9V001,R3A) #N/A JXLM5003011 HANDLE LM5S(JXLM5003,REV 3B) #N/A JXL9V002016 LCD FILM-M L9VC(JXL9V002,REV3A) M-LB-0813-1043 HCL70021011 HI-POT LABEL L70L(HCL70021,REV3A) M-MS-0808-9819 HCL7V014019 POP STICKER L7VD(HCL7V014,REV3A) M-MS-0808-9820 HCL7V027013 NO.1 STICKER L7VD(HCL7V027,REV3A)

  • Page 60: Exploded Diagram And Spare Parts List

    8. Exploded Diagram And Spare Parts List Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 61 EXPLODED PARTS LIST (VX912-1) ViewSonic Model Number: VS10162 Rev: 1b Item ViewSonic P/N Reference P/N Description Q'ty C-FP-0301-1048 EBL9V001018 BEZEL L9V(EAL9V001,REV3A) C-FP-0301-1047 EAL9V002014 MIDDLE BEZEL L9V(EAL9V002,REV3A) PL-BT-0706-0165 EBL7V027012 CONTROL BUTTON L7VD(EBL7V027,REV3A) M-MS-0808-9243 FEL7V003019 LOGO FRONT-VSC-38CM L7VC(FEL7V003,REV3A) M-MS-0808-9401 EBL7V028019 LENS L7VD(EBL7V028,REV3A)
  • Page 62 Packing for shipping PACKING PARTS LIST (VX912-1) ViewSonic Model Number: VS10162 Rev: 1b Item ViewSonic P/N Reference P/N Descriptoion Q'ty VX912-1 1L9VDZLVS98 VX912 unit P-FM-0602-0896 HBL9V001019 END CAP(L) P-FM-0602-0897 HBL9V002015 END CAP(R) DC-00000264 HGL9V002010 User manual & CD A-PC-0106-0224 DM333181G97 Power cord 3P 1.8M...
  • Page 63 Packing procedure 1. Paste protection film to protect the monitor. 2. Put the monitor in EPE bag & seal the with tape 3. Put the cushion on the monitor Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 64 4. Put the monitor into carton & put all the accessories into the carton . Then close the carton. Q SG Power cord Disassemble monitor 1. Turn the monitor , face to back-side & take the I/O cover off 2. Remove the stand back cover Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 65 3. Remove the 4pcs of black hinge screw & separate the stand & head part 4. Face-down & put the monitor on soft surface of desktop 5. Separate the back cover & front bezel Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 66 6. Remove the screws which for fixed the B/B & pull the cable out from the connector on M/B 7. Remove the B/B 8. Remove the screws on PCB shield & remove it Screws Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 67 9. Remove the MB-LCD connector & loosen the 4 screws on PCB holder Screws 10. Separate the PCB holder & panel Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 68 11. Loosen the 4 screws on the sides of panel 12. Remove the front bezel & panel Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 69 13. Remove the 4 hexagon screws beside the DVI & D-sub connector 14. Remove the screws which fixed the power board & Main board Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 71 +3.3V 24LC16 MICRO-CONTROLLER MTV312 AC 90-264V POWER INVERTER +12V +5.0V AIC1739 +2.5V AND AUDIO BOARD 1563 AIC1739 +3.3V Title <Title> BLOCK DIAGRAM Size Document Number <Doc> Date: Friday, October 15, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 72 RX5- RX5+ R161 TXC+ RXC+ R162 TXC- RXC- 0.1U/6/NC Z5.6/NC 1U/6NC Title VGA AND DVI INPUT Z5.6/NC Z5.6/NC Z5.6/NC Z5.6/NC 10K/6NC Size Document Number DISPLAY DVI-D/NC Date: Friday, October 15, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 73 RTD_SDO/SDI TEST POINT SDIO1 TCON9 22/6 YCLK SDIO2 TCON10 22/6 YDIO SDIO3 TCON11 22/6 RTD_SCSB 100/6 RESET DDC_SDA DDC_SCL Title RTD_2523 Size Document Number Custom RTD2523_DE_A Date: Friday, October 15, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 74 STBY PWR_SEL R125 100/6 P6.7 P3.0/RXD DDC_SCL MTV312M64 R109 4.7K/6 5DVCC VCC12 R108 4.7K/6 HEADER 4 6.8K/6 2K/6 Title MCU & BUTTON Size Document Number DISPLAY Date: Friday, October 15, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 75 If panel is 3.3V LVDS IF, L30 must add the part 2004/4/14 PANEL_3VCC FEB_0805/NV FEB_0805/NC FEB_0805/NC FEB_0805/NC PANEL_5_12VCC RSDS_CON50/NC Title <Title> PANEL INTERFACE Size Document Number <Doc> Date: Friday, October 15, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 76 AGND MUTE MUTE TDA7496L/NC DTC144EUA/NC AGND L23 BEAD/1206/NC VCC12 AGND AGND AGND R140 10K/6/NC R141 10K/6/NC STBY STBY DTC143EUA/NC AGND Title AUDIO Size Document Number DISPLAY Date: Friday, October 15, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 77 DSUB_5V 1N4148 1N4148 4.7K/6 C100 C101 0.1u/6 NC/6 R143 1U/8 4.7K/6 SN7002E VBRI 3DVCC MMBT3906 R144 Title 4.7K/6 <Title> POWER Size Document Number Custom <Doc> DGND Date: Friday, October 15, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 78 Control Board 11. PCB Layout Diagrams Main Board Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 79: Block Diagram

    We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation Assessment A.What do you think about the content after reading VX912 Service Manual? t i n e l l Precautions And Safety Notices 2.

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