ViewSonic VA1721wmb Service Manual
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ViewSonic VA1721wmb Service Manual

ViewSonic VA1721wmb Service Manual

Vs11605 17 inch color tft lcd display
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Service Manual

ViewSonic VA1721wmb
Model No VS11605
17" Color TFT LCD Display
Manufacture Date: Apr-02-07
- 1 –
ViewSonic Corporation
Confidential - Do Not Cop
VA1721wmb

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Summary of Contents for ViewSonic VA1721wmb

  • Page 1: Service Manual

    Service Manual ViewSonic VA1721wmb Model No VS11605 17” Color TFT LCD Display Manufacture Date: Apr-02-07 - 1 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 2: Revision History

    ENERGY STAR guidelines for energy efficiency. Disclaimer: ViewSonic Corporation shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from furnishing this material, or the performance or use of this product.

  • Page 3: Table Of Contents

    6. Troubleshooting Flow Chart 7. Recommended Spare Parts List 8. Exploded Diagram And Spare Parts List 9. Disassemble Process 10. Block Diagram 11. Schematic Diagram 12. PCB Layout Diagram - 3 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 4: Precautions And Safety Notices

    3. Keep wires away from high voltage, high temperature components and sharp edges. 4. Keep wires in their original position so as to reduce interference. 5. Usage of this product please refer to also user’s manual. - 4 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 5 That may cause “Mura.” Placing the monitor on foreign objects. That Place the monitor on a clean and soft foam could scratch the surface of the panel or cause pad. “Mura.” - 5 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 6 Place the monitor on the lap, the panel The panel is placed facedown on the lap. That surface must be upwards. may cause “Mura.” - 6 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 7: Specification

    Warning: Do not set the graphics card in your computer to exceed these refresh rates; doing so may result in permanent damage to the LCD display. ® Macintosh computers older than G3 require a ViewSonic Macintosh adapter. To order an adapter, contact ViewSonic.
  • Page 8 Blue video input No Connection Ground Red video ground Green video ground Blue video ground H/V sync ground No connection (SDA) Horizontal sync (Composite sync) Vertical sync (SCL) SIGNAL LEVEL - 8 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 9 Front Panel Function Controls And Indicators - 9 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 10 • 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.) - 10 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 11 5400K-Adds green to the screen image for a darker color. User Color Individual adjustments for red (R), green (G), and blue (B). 1. To select color (R, G or B) press button [2]. - 11 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 12 Information displays the timing mode (video signal input) coming from the graphics card in the computer, the LCD model number, the serial number, and ® the ViewSonic website URL. See your graphics card’s user guide for instructions on changing the resolution and refresh rate (vertical frequency).
  • Page 13 If you enable the Resolution Notice shown above and your computer is set at a resolution other than 1440 x 900, the following screen appears. OSD Position allows the user to move the OSD menus and control screens. - 13 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 14 No signal + [2] + [ ] Burning mode Signal + [2] + [ ] Factory mode Remark : All the short cuts function are only available while OSD off - 14 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 15: Circuit Description

    4.2 MAIN BOARD BLOCK FUNCTION DESCRIPTION The main board contains panel control logic, brightness control logic, DDC and DC convert DC circuit and so on. PWPC board Backlight and Panel TSUM16AK Keyboard EPROM EPROM - 15 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 16 Start Circuit R904, R905,ZD901 CN902 Over Control IC Voltage Protect ON/OF OSC and MOSFET DC Convert Output Q805 Circuit Circuit Lamp Over ON/OFF Feedback Voltage Control Circuit Control IC - 16 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 17 1 Kbyte sectors features(except Pm25LV512A), The devices use a single low voltage, ranging from 2.7 Volt to 3.6 Volt, power supper to perform read, erase and program operations. The devices can be programmed in standard EPROM programmers as well. - 17 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 18 Ground Device Power Supply Hold: Pause serial communication with the master device HOLD# INPUT without resetting the serial sequence. INPUT Serial Data Clock INPUT Serial Data Input - 18 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 19 This pin is to program the switching frequency. By connecting a resistor to ground to set the switching frequency. Unconnected pin Supply voltage pin Gate drive output to drive the external MOSFET - 19 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 20 Timing capacitor to set striking time and shutdown delay time Analog dimming or Internal LPWM dimming or external PWM pulse input for dimming function ISEN Current sense feedback VSEN Voltage sense feedback - 20 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 21 Capacitor for soft start time and loop compensation Timing resistor and capacitor for operation and striking frequency GNDA Ground for analog signals DRV2 Drive output PGND Ground for power paths - 21 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 22 Block Diagram - 22 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 23: Adjustment Procedure

    5400 color temp. parameter is Wx = 0.335±0.03;Wy = 0.350 ±0.03; Y ≥ 190 cd/m E、MEM.CHANNEL1 ( SRGB color): SRGB color temp. parameter is Wx=0.313±0.03;Wy=0.329±0.03;Y≥190cd/m 3.) Into factory mode of VA1721wmb - 23 – ViewSonic Corporation Confidential - Do Not Cop...
  • Page 24 (1)、Switch the CA-210 to RGB-Mode (with press “MODE” button ) (2)、Switch the MEM .channel to Channel 1 ( with up or down arrow on CA-210 ) (3)、The LCD-indicator on CA-210 will show x=0.313±0.03, y=0.329±0.03, Y≥190 cd/m - 24 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 25 2).Change to each mode in turn and wait for the monitor finish auto-alignment and save press before change to next mode. 3).Until all of modes are adjusted, exit OSD menu and press POWER OFF to exit factory mode. - 25 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 26 1024 x 768 @ 72Hz, 58.1kHz 1024 x 768 @ 75Hz, 60.0kHz 1280 x 1024 @ 60Hz , 48.4kHz 1280 x 1024 @ 75Hz , 60.0kHz 1440 x 900 @ 60Hz , 55.9kHz - 26 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 27 The screen must have White Balance White & Black Pattern the pure white and black Figure 9 pattern, no other color. Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2) - 27 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 28 Horizontal & Vertical Thickness Pattern R. Color Pattern (Figure 4) (Figure 3) G. Color Pattern (Figure 5) B. Color Pattern (Figure 6) Full White Pattern (Figure 7) Dark Screen Pattern (Figure 8) - 28 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 29 (a)Select and enter “Manual Image Adjust” function on OSD Main Menu. (b)Then, select and enter “Horizontal Size” or “Horizontal/Vertical Position” function to adjust the video boundary to be full scanned and within screen frame. - 29 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 30 After final QC step, we have to erase all saved changes again and restore the factory defaults. You should do “All Mode Reset” again. Power Off Monitor Turn off the monitor by pressing “Power” button. - 30 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 31 2.1 Connect P2 of Fixture with printer port of PC by LPT Cable. 2.2 Connect P1 of Fixture with Monitor(TSUM series) by VGA Cable. 2.3 Plug Power Adapter to Fixture. 2.4 Connect Power Cord to Monitor(TSUM series). - 31 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 32 P3： to Signal Generator P2：to LPT Cable 3 Firmware Upgrade Procedure Step 1. Let Monitor(TSUM series) set to be connected with AC cable and VGA cable. Step 2.Execute the MSstar ISP tool. - 32 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 33 Step 5. Click “Auto” button. Be sure that function of Erase Device (File Area), Blank, Program and Verify is selected, then execute the flashing action by clicking the “Run” button. - 33 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 34 TextBox and Flash Status will be “8C” in the right-bottom of window. Step 7. Unplug and replug power cord of Monitor(TSUM series) set and then check the OSD operation and image on srceen. Step 8. At last, do “Memory Recall.” - 34 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 35 3.2.5 Connect PC to the additional monitor. JP1： Power Adapter P2： VGA Cable P1： to LTP Cable 3.3 DDC Key In Procedure Sep1.Select and execute DDC Key In program - 35 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 36 - 36 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 37 Sep2:Inpute the S/N and execute “Enter” - 37 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 38 - 38 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 39 Sep3:Key the “Enter” and write the data - 39 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 40 Sep4:If ddc program OK and show “data compare ok” - 40 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 41: Packing Procedure

    5.7 Packing Procedure - 41 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 42: Troubleshooting Flow Chart

    Troubleshooting Flow Chart - 42 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 43: Recommended Spare Parts List

    SCREW XN01A Q1G 330 8120 SCREW XN01A Q1G 330 8120 SCREW XN01B Q1G 330 8120 SCREW XN01C Q1G 330 8120 SCREW XN01D Q1G1740 10120 Q4X10 XN01A 750GLH70GW112N000V PANEL HSD170MGW1-A00 - 43 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 44 Stand-Cover A34G0317 KR L Base A34G0318 KR L Hinge cover A37G0033 1 HINGE ASS'Y J12G 808 3 VESA RUBBER J40G 17T7095TA VA1721WMB-2 J40GSTAR709 1A EPA LABEL J41G7802709 6B INSERT CARD J41G7802709 7A J44G7013 1 EPS-TOP J44G7013 2 EPS-BOTTOM J44G7013709 2B...
  • Page 45 CHIPR 0OHM +-5% 1/10W R421 61G0603000 CHIPR 0OHM +-5% 1/10W R488 61G0603000 CHIPR 0OHM +-5% 1/10W R720 61G0603000 CHIPR 0OHM +-5% 1/10W R721 61G0603100 RST CHIP 10R 1/10W 5% R401 - 45 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 46 R711 61G0603103 CHIPR 10KOHM+-5% 1/10W R714 61G0603103 CHIPR 10KOHM+-5% 1/10W R717 61G0603103 CHIPR 10KOHM+-5% 1/10W R727 61G0603104 CHIPR 100KOHM +-5% 1/10W R487 61G0603121 RST CHIP 120R 1/10W 5% R409 - 46 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 47 C414 65G0603104 32 CHIP 0.1UF 50V X7R C415 65G0603104 32 CHIP 0.1UF 50V X7R C416 65G0603104 32 CHIP 0.1UF 50V X7R C417 65G0603104 32 CHIP 0.1UF 50V X7R C419 - 47 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 48 71G 59B121 CHIP BEAD FB409 93G 39147SEM ZMM5V6 D406 93G 39147SEM ZMM5V6 D408 93G 39147SEM ZMM5V6 D409 93G 39147SEM ZMM5V6 D410 93G 39147SEM ZMM5V6 D411 93G 39147SEM ZMM5V6 D412 - 48 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 49 PWPC BOARD 9G6005 1 PIN FOOT GND1 33G8020 2D AC CONN,2P R/A DIP BY ACES CN801 33G8020 2D AC CONN,2P R/A DIP BY ACES CN802 40G 45762420A ID LABEL 1.02 - 49 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 50 57G 763 14 AM9945N-T1-PF SOIC-8 Q805 61G0805100 RST CHIP 10R 1/8W 5% R917 61G0805100 1F RST CHIP 1K 1/8W 1% R918 61G0805100 1F RST CHIP 1K 1/8W 1% R928 - 50 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 51 R903 61G1206102 CHIP 1K OHM 5% 1/8W R914 61G1206102 CHIP 1K OHM 5% 1/8W R921 61G1206102 CHIP 1K OHM 5% 1/8W R929 61G1206102 CHIP 1K OHM 5% 1/8W R932 - 51 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 52 93G 39S 24 T RLZ5.6B ROHM ZD902 93G 39S 40 T RLZ13B ROHM ZD903 93G 39S 40 T RLZ13B ROHM ZD904 93G 39S 45 T RLZ36B ZENER DIODE ZD901 - 52 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 53 TINCOATEDCOPPER J927 95G 90 23 TINCOATEDCOPPER J930 715G2274 1 VS POWER BOARD PCB 705GJ7K0 61001 R910 ASS'Y 61G152M10458G 100K OHM 5% 2W R910 96G 29 6 SHRINK TUBE UL/CSA - 53 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 54: Different Part List

    中性合格证 1185 MIDDLE TAPE FOR CARTON 89G414A18N LS POWER CORD 售后服务 LABEL J40G 581709 7A CARTON 贴纸 J40G 88G709 1A J41G7801709 5B WARRANTY CARD J45G 8861813A OVT PE BAG - 54 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 55: Exploded Diagram And Spare Parts List

    8. Exploded Diagram And Spare Parts List - 55 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 56 Packing For Shipping - 56 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 57: Disassemble Process

    10、 Lift up the main frame and lift down the LVDS connectors according to the direction of the arrowhead, refer to the following picture 17,18. 11、 That’s all. The disassemble process of the unit is over. 9.1.3 Show pictures ： （Picture 1） （Picture 2） - 57 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 58 （Picture 3） （Picture 4） （Picture 5） （Picture 6） （Picture 7） （Picture 8） （Picture 9） （Picture 10） - 58 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 59 （Picture 11） （Picture 12） （Picture 13） （Picture 14） （Picture 15） （Picture 16） （Picture 17） （Picture 18） - 59 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 60 （Picture 19） - 60 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 61: Block Diagram

    Block Diagram - 61 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 62: Schematic Diagram

    5.PANEL INTERFACE PC5V VCTRL VCTRL +3V3 VCC1.8 Adj_BACKLIGHT Adj_BACKLIGHT VCC3.3 VLCD VLCD_12V G1558-1-VS-X-3-061220 Title 4.SCALER VLCD TSUM16AK-1 VLCD_12V Size Document Number 2.POW ER Date: Thursday , December 21, 2006 Sheet - 62 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 63 Q707 on_Panel_12V C715 0.1uF C717 R727 G1558-1-VS-X-3-061220 C718 10uF/16V 10K 1/10W 5% C720 C719 R728 0.1uF Title TSUM16AK-1 Size Document Number POWER Date: Thursday , December 21, 2006 Sheet - 63 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 64 D424 10K 1/10W 5% ESD_5V G1558-1-VS-X-3-061220 C447 C448 C449 C450 C451 C452 C453 C454 D425 Title TSUM16AK-1 Size Document Number INPUT RLZ36B Date: Thursday , December 21, 2006 Sheet - 64 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 65 KEY _AUTO KEY _MENU KEY _RIGHT KEY _LEFT POWER KEY _C OUT-L+ OUT-R+ G1558-1-VS-X-3-061220 OUT-L- OUT-R- Title TSUM16AK-1 Size Document Number CONN SCALER Date: Thursday , December 21, 2006 Sheet - 65 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 66: Panel Interface

    C104 C105 R108 LVA3M RXE3- RXE3+ LVA3P VLCD_12V R109 NC/IL-FHR-B50S-HF (JAE) CONN VLCD VLCD G1558-1-VS-X-3-061220 Title TSUM16AK-1 Size Document Number PANEL INTERFACE Date: Thursday , December 21, 2006 Sheet - 66 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 67 RK7002 D803 LL4148WP Q806 RK7002 C803 D804 LL4148WP Q807 RK7002 TPV (Top Victory) Electronics Co., Ltd. Title G2274-B-VS-X-4-061218 Size Document Number PWPC721HV1J Date: Monday , December 18, 2006 Sheet - 67 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 68 Pitch 2.54mm CONN CN901 IC904 R936 2.43KΩ 1% 1/8W SOCKET KIA431A-AT/P TPV (Top Victory) Electronics Co., Ltd. Title G2274-B-VS-X-4-061218 Size Document Number PWPC721HV1J Date: Monday , January 08, 2007 Sheet - 68 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 69 FB01 SPK-R 120 OHM 100pF CONN 100pF A_GND SPK-L A_GND AOC (Top Victory) Electronics Co., Ltd. Title KEY PAD Size Document Number Date: Tuesday , March 21, 2006 Sheet - 69 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...

  • Page 70: Pcb Layout Diagram

    12. PCB Layout Diagram 12.1 MAIN BOARD PCB TOP VIEW - 70 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 71 12.2 MAIN BOARD PCB BUTTON VIEW - 71 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 72 12..3 POWER PCB TOP VIEW - 72 – ViewSonic Corporation Confidential - Do Not Cop VG1721wm/VA1721wm...
  • Page 73 12.4 POWER PCB BUTTON VIEW - 73 – ViewSonic Corporation Confidential - Do Not Cop VG1721wm/VA1721wm...
  • Page 74 12.5 KEY BOARD TOP VIEW 12.6 KEY BOARD BUTTON VIEW - 74 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 75 12.7 POWER PCB TOP& BUTTON VIEW - 75 – ViewSonic Corporation Confidential - Do Not Cop VA1721wmb...
  • Page 76 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 suggestion to the Director, Quality System & Process (marc.maupin@viewsonic.com) - 76 – ViewSonic Corporation...

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