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ViewSonic vx912-1 Service Manual

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Service Manual

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

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Summary of Contents for ViewSonic vx912-1

  • Page 1: Service Manual

    Service Manual ViewSonic VX912-1 Model No. VS10162 19” Color TFT LCD Display (VX912_SM_836 Rev. 1a Oct. 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 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 Input impedance Video input : 75 ohms Sync input : > 1 k ohms 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 20 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 21 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 22 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 ViewSonic Corporation VX912...
  • Page 23 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 24 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 25 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 ViewSonic Corporation VX912...
  • Page 26 NV_RAM (U4) SDA P3.5 NV_RAM (U4) SCL P1.7 Key_down P6.3 Key_right P1.6 Key_up P6.2 Key_left P4.1 Key_mute P5.6 VGA connector P1.5 Key_select P5.3 LED_red P5.4 LED_green P6.6 LCD panel power1 on / off control Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 27 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 28: Adjusting Procedure

    Press Up Button to make current option high. Press Down Button to make current option low. (4) Information Page: Press “2” Button to show the informatio n Press “1” Button to exit Information page. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 29 Press “1” Button to exit Langua ge Select item. Press Up Button to the previous option or Down Botton 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 30 Press “2” Button to enter the Brightness Dialog. Press Up Button to make contrast high. Press Down Button to make contrast low. (2) Auto Image Adjust Dialog Press “2” Button to do the auto image adjust function. Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 31 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 32 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 33 Pattern 5 Pattern 6 Pattern 7 Pattern 8 Pattern 9 Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 34 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) Firmware upgrade program Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 35 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 36 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 37 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 38 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 39 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 40 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 41 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 42 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 43 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 44 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 45 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 46: Trouble Shooting Flow Chart

    6. Trouble Shooting Flow Chart 1. No Power Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 47 2. No Characters , Missing Color 3 Always show NO SIGNEL Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 48: Recommended Spare Parts List

    7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VX912) ViewSonic Model Number: VX10162 Rev: 1b Item Description ECR/ECN ViewSonic P/N Ref. P/N Location Q'ty PC Board Assembly: AS02B012D24 Power board B-PS-0204-0076 Adaptor/Inveter board main board B-MB-0201-2780 10MBZZZVSF3 mail board...
  • Page 49 ViewSonic Model Number: VX10162 BOMS LIST (VX912-1) Rev: 1a Level Part Number Part Description Location VX912 1L9VDZLVS12 L9V LCD MONITOR(L9VD,LG VX912)USA #N/A 29L7VMB00T3 L7VD M/B ASSY(FOR L9V) VX912 #N/A 3BL7VSS0033 L7VD M/B S/S ASSY(FOR L9V) #N/A CC62204MD23 CAP ELEC 22U 25V(+-20%,105C,5*11,2000HR)

  • Page 50: Exploded Diagram And Spare Parts List

    8. Exploded Diagram And Spare Parts List Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 51 EXPLODED PARTS LIST (VX912-1) ViewSonic Model Number: VX10162 Rev: 1a Item ViewSonic P/N Ref. P/N DESCRIPTION UNIT 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 52 Packing for shipping PACKING PARTS LIST (VX912-1) Rev: 1a Item Viewsonic P/N Ref. P/N Description M-00000265 1L9VDZLVS12 VX912 LCD monitor P-FM-0602-0896 HBL9V001019 End-cap (L) P-FM-0602-0897 HBL9V002015 End-cap (R) DC-00000264 HGL9V002010 User menual & CD ROM A-PC-0106-0224 DM333181G97 Power cord 3P 1.8M...
  • Page 53 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 54 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 55 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 56 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 57 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 58 11. Loosen the 4 screws on the sides of panel 12. Remove the front bezel & panel Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 59 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 60: Block Diagram

    9. Block Diagram 9.1 Video Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 61 9.2 Power Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 62 +3.3V +3.3V 24LC16 MICRO-CONTROLLER MTV312 AC 90-264V POWER INVERTER +12V AIC1563 +5.0V AIC1117AIJ +2.5V AND AUDIO BOARD AIC1117AIJ +3.3V Title BLOCK DIAGRAM Size Document Number DISPLAY Date: Thursday, February 19, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 63: Schematic Diagrams

    TX0+ 4 RX0+ RX5- RX5+ R121 TXC+ 4 RXC+ R122 TXC- 4 RXC- Title VGA AND DVI INPUT Z5.6/NC 1U/6NC Size Document Number 10K/6NC DISPLAY Date: Thursday, February 19, 2004 Sheet DVI-D Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 64 GPO1 22/6/NC XSTB 6 GPO1 GPO2 YDIO 6 GPO2 0.1U/6 GPO3 YCLK 6 BYPASS GPO3 GPO4 YOE 6 AVSS_LPLL GPO4 Title MST8131A Size Document Number DISPLAY Date: Thursday, February 19, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 65 2N3904 VCC12 1K/6 1U/6 0.1U/6 10K/6/NC VDD3V3 6.8K/6 1K/6 PWR_SEL 4.7K/6 R112 2K/6 1U/8 Title MCU & BUTTON 2K/6 BRIGHTNESS 4 Size Document Number 2N3904 DISPLAY Confidential - Do Not Copy ViewSonic Corporation VX912 Date: Thursday, February 19, 2004 Sheet...
  • Page 66 AF730B-A2G1T/NC XSTB BXDIO YCLK YDIO LCDVDD 0/8/NC 0/8/NC 0/8/NC 0/8/NC MTH276D126 MTH276D126 LCDVCC 0/8/NC Title PANEL INTERFACE Size Document Number AF750B-A2G1T/NC DISPLAY 0.1U/6/NC 0.1U/6/NC MTH276D126 MTH276D126 Date: Thursday, February 19, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 67 MUTE TDA7496L/NC DTC144EUA/NC AGND AL6 BEAD/1206/NC BEAD/1206/NC VCC12 AGND AGND AGND AR13 10K/6/NC AR14 10K/6/NC AGND STBY STBY DTC144EUA/NC Title AGND Audio Size Document Number DISPLAY Date: Thursday, February 19, 2004 Sheet Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 68 VOUT CX000800000/1206 ADJ/GND 200/6 LT1117/TO223 100u/16V 100u/16V 200/6 VDD3V3 0.8A Max VOUT CX000800000/1206 ADJ/GND Title POWER 200/6 LT1117/TO223 Size Document Number 100u/16V DISPLAY 100u/16V SCHEMATIC1 Date: Thursday, February 19, 2004 Sheet 330/6 Confidential - Do Not Copy ViewSonic Corporation VX912...

  • Page 69: Pcb Layout Diagrams

    11. PCB Layout Diagrams Confidential - Do Not Copy ViewSonic Corporation VX912...
  • Page 70 Add.: Fax: Tel: 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) Confidential - Do Not Copy...

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