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ViewSonic Q19wb-3 Service Manual

19” color tft lcd display
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Service Manual

ViewSonic Q19wb-3
Model No. VS11578
19" Color TFT LCD Display
(Q19wb-3_SM Rev. 1a Oct. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic Q19wb-3 Model No. VS11578 19” Color TFT LCD Display (Q19wb-3_SM Rev. 1a Oct. 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 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 4: Precautions And Safety Notices

    1.0 milliamp. In the case of a measurement exceeding the 1.0 milliamp value, a rework is required to eliminate the chance of a shock hazard . AC VOLTMETER 0.15u To Metal Parts Earth Ground 1500 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 5 Notice Q19wb-3 Correct Method Incorrect method Correct Method Incorrect method Correct Method Incorrect method Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 6 Correct Method Incorrect method Correct Method Incorrect method Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 7: Specification

    640 x 350, 640 x 400, 640 x 480, 720 x 400, 800 x 600, 832 x 624, 1024 x 768, Resolution Compatibility 1152 x 864, 1152 x 870,1280 x 1024, 1440 x 900, Exclusions Not compatible with interlaced video Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 8: Electrical Requirements

    640 x 350 @ 70 Hz, 31.5 For Separated Sync, Switch 640x400@70Hz and 720x400@70Hz by KHz 　 　 　 640 x 400 @ 70 Hz, 31.5 [AUTO]+[MENU] short cut key (primary = 720x400@70Hz) Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 9 ● The monitor needs to do “Auto Adjust” the first time a new mode is detected (see section “0-Touch™ Function Actions”) ● While running Change Mode, Auto Adjust or Memory Recall, the image shall blank Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 10 Typical = 5 ms (Tr = 1.5 ms; Tf = 3.5 ms) Maximun = 10 ms (Tr = 3ms; Tf = 7ms) Mercury 3.5 mg per lamp Panel Defects Please see Panel Quality Specifications. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 11 Typical = 5 ms (Tr = 1.5 ms; Tf = 3.5 ms) Maximun = 10 ms (Tr = 3ms; Tf = 7ms) Mercury 3.5 mg per lamp Panel Defects Please see Panel Quality Specifications. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 12 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 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 13: Front Panel Function Control Description

    3. Front Panel Function Control Description Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 14: Main Menu Controls

    G. Reset returns adjustments to the original factory settings if the display is operating in a factory Preset Timing Mode listed in this user guide. H. Exit allows you exit the OSD menu, press button [Menu]. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 15: Circuit Description

    2.3 Video signal connector for analog input: 15P Mini D-Sub 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 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 16 Input impedance Analog video input: 75 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. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 17: ______________________________________________________________________

    5. EDID data Analog EDID: Analog EDID is stored in U6 HSD panel: VIEWSONIC CORPORATION EDID Version # 1, Revision # 3 DDCTest For: ViewSonic Q19wb-3 ______________________________________________________________________ EDID Block 0, Bytes 0-127 128 BYTES OF EDID CODE: ________________________________________ 0 | 00 FF FF FF FF FF FF 00 5A 63...
  • Page 18 1440x900 Pixel Clock: 106.50 MHz ______________________________________________________________________ Horizontal Image Size: 408 mm Vertical Image Size: 255 mm Refreshed Mode: Non-Interlaced Normal Display - No Stereo Horizontal: Active Time: 1440 pixels Blanking Time: 464 pixels Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 19 Min Horiz. Freq - 31 KHz Max Horiz. Freq - 80 KHz Pixel Clock - 140 MHz Secondary GTF - Not Supported ______________________________________________________________________ (108-125) Detailed Timing / Descriptor Block 4: Monitor Name: Q19wb-3 (126) No Extension EDID Block(s) (127) CheckSum OK Q19wb-3 ViewSonic Corporation...
  • Page 20 Crystal Input Clock (XTALI and XTAL). This is the input pair to an internal crystal oscillator andcorresponding logic. A 14.318 MHz crystal is recommended. Hardware Reset ( Pin 19 ) Hardware Reset signal is generated by TSUM16AK-LF-1 (U4/Pin 19).It assert a reset signal at least 1 ms. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 21 , Features of the TDA7496L include linear volume(pin6), Stand-by(pin11) and mute(pin12) functions. Audio line-in are feed into pin 4,9 of the TDA7496L. The output power is controlled by the DC voltage of AQ1. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 22 Pin 8 -------------> On /Off ( "High" set Lamp on ) CN202 ~ CN205 ; Pin 1 ---------> HV ( High Voltage for CCFL ) Pin 2 ---------> Return ( Low Voltage for CCFL ) Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 23: Adjustment Procedure

    1152 x 864 @ 75Hz, 67.5kHz 1152 x 870 @ 75Hz, 68.7kHz 1280 x 1024 @ 60Hz, 63.4kHz 1280x 1024 @ 75Hz, 79.97kHz 1440x 900 @ 60Hz, 59.9kHz 1440x 900 @ 75Hz, 75kHz Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 24 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 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 25 Pattern 5 Pattern6 Pattern 7 Pattern 8 Pattern 9 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 26 [<] [>] Press the button to highlight the previous item or the button to highlight the next item. 1) Auto Adjustment Item Press the [Menu]button to execute the auto adjustment function. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 27 Press the [Menu] button to enter the sharpness adjustment page. [>] Press Button to increase image sharpness. [<] Press Button to decrease image sharpness. [AUTO] Press the button to exit the page. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 28 Press the [Menu] button to enter the H.OSD Position adjustment page. [>] Press Button to shift the OSD to the right. [<] Press Button to shift the OSD to the left. [AUTO] Press the button to exit the page. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 29 Button to increase the volume. [<] Press Button to decrease the volume. [AUTO] Press the button to exit the page. 3) Information Item Press the [Menu] button to enter the Information page. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 30 [>] Speaker volume/Mute Press the button to enter the Dialog. [AUTO] Speaker volume/Mute Press the button to exit the Dialog. Press the [Menu] button to switch the Speaker volume and Mute page. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 31 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” Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 32: Firmware Update Procedure

    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 : W9V-Q2 PC ( Personal computer ) LPT cable Fixture (LM5ISP) Firmware upgrade program 2. Connection : To PC To Monitor Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 33 In order to ensure can execute ISP program, please set BIOS in PC or Notebook as Fig 0.0 Fig 0.0 0.1 Double-click the “ PORT95NT.exe” in Windows & install the program. , see Fig 0.1 Fig 0.1 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 34 0.2 Keep on press “ Next “ 4 times to go through the installation processes, see Fig. 0.2 Fig. 0.2 0.3 Choose “ Typical “ then press “ Next “ , see Fig. 0.3 Fig. 0.3 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 35 0.4 Keep on press “ Next “ 4 times to go through the installation processes, see Fig. 0.4 Fig. 0.4 0.5 Install completed , restart the PC or notebook. See Fig 0.5 Fig. 0.5 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 36 Appendix B : How to use software to upgrade the BIOS : 1.1 Double-click the “ ISP_TOOL.exe” in Windows, see Fig 1.1 Fig. 1.1 1.2 It is the main meun of ISP_TOOL , see Fig 1.2 Fig. 1.2 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 37 1.3 Single-click the “Connect” button to connect with MCU. The dialog of “O.K.” will appear in window, when the computer has finished to connect with MCU, see Fig 1.3 Fig. 1.3 1.4 Single-click the “Read” button,you can select the file of BIOS. see Fig 1.4& Fig1.5 Fig. 1.4 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 38 Fig. 1.5 1.5 When the file of BIOS has been selected ,you will see the dialog,see Fig1.6 Fig. 1.6 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 39 2.1 Single-click the “Run” button,you can program the MCU. .see Fig2.1 Fig. 2.1 2.2 If the program has been done,you will seen fig3.2. Now you must Single-click the “Dis Con” to disconnect with MCU. Fig2.2. Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 40 Q19wb-3 series de-assembling procedure 1. Move the monitor our from carton 2. Put the monitor on desk & face down 3. Loose the screws &Remove the HINGE COVER 4. Loose the screws & remove the stand 5. Loose the screws &Separate the BACK COVER 6.
  • Page 41 7. Pull out the cables & Loose the screws &Separate the 8. Remove the AL-Foil speaker 9.Remove the AL-Foil 10. Pull out the cables 11. Loose the screw 12.Tear off the yellow tape& Pull out the LVD cables Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 42 13. Loose the bezel screw 14. Remove the bezel 15. Loose the BKT screw L/R 16. Move the BKT screw L/R 17. Remove the BEZEL BKT 18. Remove the GASKET Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 43 19. Loose the BUTTON/B screw& Remove the BUTTON/B 20. Loose the IO NUT 21. Remove the POWER/B MYLAR 22. Loose the screw 23. Separate the M/B&P/B& GND PLATE 24.Separate the M/B&LVDS CABLE Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 44 Q19wb-3 1. Sticker on LCD protection film 2. Put the monitor into the PE or EPE bags 3. Put on the end-cap left / right 4. Put the monitor into carton Face-up 5. Put all accessories into carton 6.

  • Page 45: Troubleshooting Flow Chart

    Check Scalar Module Change Cable Output CN4 From(Power module)CN101 to (Scalar/B)CN4 Pin 5,6 = 5V? Check Power Button Check Cable From Scalar/B(CN8) Open? to Button/B(CON1) Change Cable Change Switch or Button Board Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 46 Check or Change U3 Check Inverter From Power Check CN7 to Panel Signal Output board OK? Check X’Tal 14.318Mhz Change X1 Check or Change Cable or Panel Check H,V SYNC? Change VGA Cable Change U4 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 47 Check Input source or Change AJ1 U3 Check ACN1 to Speaker OK? Change Speaker or ACN1(Cable) Check AU1(pin6) Change AQ1 Volume and AQ1 OK? Check AU1(pin12)Mute,(pin11) Stby Change AU1 or AQ2 or AQ3 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 48: 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 49 BOM LIST (Q19wb-3) ViewSonic Model Number: VS11578 Rev: 1a Serial No. Prefix: QHZ Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1W9VZQVS046 W9V-Q2 LCD MONITOR(Q19WB-3,USA)GP B-00008125 21L9F0MB0D3 L9F-A2 M/B ASSY(W9ZA-L2,M16AK-LF-1) GP 31L9F0SS0C1 L9F-A2 M/B S/S ASSY(W9ZA-L2,M16AK-1)GP CC547X6MD03 CAP EC 4.7U50V(+-20%105C.5*11,5K)CXN GP...
  • Page 50 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty P-00008151 HBW9ZA04017 END CAP-R W9ZA-A1(HBW9ZA04,REV3A) GP P-00008152 HBW9ZA03011 END CAP-L W9ZA-A1(HBW9ZA03,REV3A) GP M-LB-0813-0747 HCL7V004013 CORE LABEL(HCL7V004,REV3A)GP M-LB-0813-0745 HCL7V002011 SERIAL LEBAL L7V(HCL7V002,REV3A) GP M-LB-0813-1042 HCL7V019011 CARTON LABEL L7VC(HCL7V019,REV3B) GP M-LB-0813-1043 HCL70021011...

  • Page 51: Exploded Diagram And Exploded Parts List

    8. Exploded Diagram and Exploded Parts List EXPLODED PARTS LIST (Q19wb-3) ViewSonic Model Number: VS11578 Rev: 1a Serial No. Prefix: QHZ Item ViewSonic P/N Ref. P/N Description Q'ty EAW9V002014 LCD BEZEL W9V-Q2 M-SCW-0824-6761 MM30030IBJ4 SCREW M3*3-I-NI EBW9V002015 BUTTON W9V-Q2 EBW9C002012...
  • Page 52 TO PANEL LVDS CN202 CN101 CN203 POWER/B TO PANEL &INV./B Main Board CN204 ACN1 CN205 Button Board CON1 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 53 Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 54 PACKING PART LIST (Q19wb-3) ViewSonic Model Number: VS11578 Rev: 1a Item ViewSonic P/N Ref. P/N Location Q'ty 1W9VZQVS046 W9V-Q2 LCD MONITOR(Q19WB-3,USA)GP C-00008153 38L7C0BS003 L7C-A3 BASE SUB ASSY(BLACK)GP P-00008152 HBW9ZA03011 END CAP-L W9ZA-A1 P-00008151 HBW9ZA04017 END CAP-R W9ZA-A1 P-00008150 HFW9V002019 CARTON W9V-Q2...

  • Page 55: Block Diagram

    9. Block Diagram System Block Diagram Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 56: Schematic Diagrams

    CLK+ 5 RXC+ RXC- 10/6 CLK- 5 RXC- R106 10K/6/NC VCC3.3 R107 10K/6/NC DAN217K/NC DAN217K/NC DAN217K/NC DAN217K/NC RX0- RX0+ RXC+ RXC- ViewSonic Corporation DVI-I Model Title VGA & DVI Input Date Rev: Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 57 Add WP Control Avoid data losing. VCC3.3 VCC3.3 VCC3.3 VCC3.3 VCC3.3 VCC3.3 VCC3.3 RIGHT_O LEFT_O P WR_O MENU_O SEL_O UP_O DOW N_O ViewSonic Corporation DAN217K/NC DAN217K/NC DAN217K/NC DAN217K/NC DAN217K/NC DAN217K/NC DAN217K/NC Model Title SCALER Date Rev: ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 58 CHT2907APT LL1N4148PT DSUB_5V DVI_5V 100/6/1% VCC3.3 U3-A VCC5V 0/6/NC VOUT ADJ/GND BAT54C-GS08 ML25PT AP1117ELA/TO252/NC VCC3.3 0.8A Max VOUT CX121A50006/1206 ADJ/GND AP1117ELA/TO223 200/6/1% 330uF/16V 330uF/16V ViewSonic Corporation 330/6/1% Model Title POWER Date Rev: ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 59 LVB3M LVB3M LVBCKP LVBCKP LVBCKM MTH276D126 MTH276D126 LVBCKM LVB2P LVB2P LVB2M LVB2M LVB1P LVB1P LVB1M LVB1M LVB0P LVB0P LVB0M LVB0M MTH276D126 FFC 30PIN PH=1.0 (MS240430)/NC ViewSonic Corporation Model Title PANEL Date Rev: ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 60 10K/6 TDA7496L PMBS3906 AGND AL6 CX201209813 VCC3.3 +12V_A AGND AGND AGND AGND AR12 10K/6 CX201209813 10K/6 AR15 1K/6 AR13 STBY PMBS3906 10K/6 AGND ViewSonic Corporation AGND AGND Model Title AUDIO Date Rev: ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 61 ViewSonic Corporation Model Title AC to DC ADAPTOR Date Rev: ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 62 ViewSonic Corporation Model Title AC to DC ADAPTOR Date Rev: ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 63 SW METALDOME SW METALDOME PH=1.0mm 8Pin/NC SW METALDOME BLUE AMBER LED1 KPTB-1612 Orange / Blue : KPTB-1612SEKPBAC Orange / Green : KPTB-1612NSGC ViewSonic Corporation Model Title Metal Dome Button Board Date Rev: ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...

  • Page 64: Pcb Layout Diagrams

    11. PCB Layout Diagrams Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 65 ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 66 ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 67 ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 68 ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 69 ViewSonic Corporation Q19wb-3 Confidential - Do Not Copy...
  • Page 70 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) Q19wb-3 ViewSonic Corporation Confidential - Do Not Copy...

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