ViewSonic VLCDS26064-4W Service Manual
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ViewSonic VLCDS26064-4W Service Manual

ViewSonic VLCDS26064-4W Service Manual

20" color tft lcd display
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Service Manual

ViewSonic VP2000s
Model No.
VLCDS26064-4W
20" Color TFT LCD Display
(VP2000s_SM_892 Rev. 1b Mar. 2005)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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Summary of Contents for ViewSonic VLCDS26064-4W

  • Page 1: Service Manual

    Service Manual ViewSonic VP2000s Model No. VLCDS26064-4W 20" Color TFT LCD Display (VP2000s_SM_892 Rev. 1b Mar. 2005) 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. Adjustment Procedure 6. Troubleshooting 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 VP2000s...

  • 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. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • 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. Confidential - Do Not Copy ViewSonic Corporation VP2000s...

  • Page 6: Specification

    AC 90 to 264V, 50/60Hz ± 3Hz, 1.5A. Inrush current Less then 50Ap. For 115V Less then 100Ap. For 230V Power Consumption: Less then 73W. On mode. Less then 4W. Active off mode. Less then 2W. DC power off. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 7 Note.1: Luminance variation: MAX. Luminance in 9 point (1 ~ 9) BU = 1.54 MIN. Luminance in 9 point (1 ~ 9) L = 408mm / W = 306mm FIG.1 Luminance test points Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 8 These functions are not available in 1600x1200 mode; the item is faded out and can't be selected. When the input signal's aspect ratio is 4:3, the "Fill Aspect ratio" function yields the same result as "Fill Screen". Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 9 7.3 Input a 1600x1200 / 60Hz, 16 gray-level pattern at 100IRE, with brightness set to 100% and contrast set to 100%. 7.4 Verify that under the 9300K / 6500K / 5400K / 5000K settings, no more than 4 of the 16 grays are saturated. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 10 [ 1 ]. Main Menu. Select next input. (Sequence: D-SUB → DVI-A → DVI-D) [ 2 ]. [ UP ] or [ DOWN ] arrow. Directly activate the Contrast menu. Switch to Brightness menu Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 11 IC954 EEPROM data see Appendix-B item a. For the EDID data see Appendix B. VP2000s analog & DVI-A are the same as item h. For the DVI-D input 1 see item i. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 12 Use a PC to check the USB VID, which should be 0543, and the PID, which should be 1169. For USB test settings see Appendix E. 8. For auto alignment, it is necessary to execute the auto image adjust command for 3 DOS modes (640x350, 720x400, 640x400). Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 13 60.317 72.188 75.000 85.061 74.553 60.004 70.069 72.082 75.029 84.997 Sync. Polarity ＋ ＋ ＋ ＋ － － － － ＋ ＋ V. total (Lines) V. sync. (Lines) V. back porch (Lines) V. active (Lines) V. front porch (Lines) Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 14 ＋ ＋ ＋ － ＋ V. total (Lines) 1000 1005 1066 1066 1072 1250 V. sync. (Lines) V. back porch (Lines) V. active 1024 1024 1024 1200 (Lines) V. front porch (Lines) Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 15 Appendix B: DDC contents. a. 128 bytes of EDID code for VP2000s analog. i. 128 bytes of EDID code for VP2000s digital. Confidential - Do Not Copy ViewSonic Corporation VP2000s...

  • Page 16: Front Panel Function Control Description

    Also a shortcut to toggle analog and digital connection. Displays the Main Menu or exits the control screen and saves adjustments. Power light Green = ON Orange = Power Saving Power On/Off Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 17 • 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 VP2000s...
  • Page 18 9300K — Adds blue to the screen image for cooler white (used in most office settings with fluorescent lighting). 6500K — Adds red to the screen image for warmer white and richer red. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 19 Manual Image Adjust moves the screen image left or right. Horizontal Position moves the screen image up or down. Vertical Position adjusts the width of the screen image. Horizontal Size Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 20 The display will do a one time detection for available inputs when first powered on and choose among the available signals bas on the selected Input Priority. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 21 Memory Recall settings if the display is operating in a factory Preset Timing Mode listed in this user guide. Exception: This control does not affect changes made with the User Color control. Confidential - Do Not Copy ViewSonic Corporation VP2000s...

  • Page 22: Circuit Description

    It is equipped with a serial interface for configuration from EEPROM or micro-controller when the default settings are not used. Includes integrated termination and pull-up/pull-down resistors, as well as internal short circuit protection of DP and DM lines. Supports individual or gangedover-current protection and power control. Confidential - Do Not Copy ViewSonic Corporation VP2000s...

  • Page 23: Adjustment Procedure

    8.3 Interference of EMI: The inspection shall be carried out in a place where the set is not disturbed by excessive external electric waves or magnetic fields. 8.4 Temperature: 24 ± 2 8.5 Humidity: 65 ± 20%. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 24 Execute the "All mode recall Select the "Copy TODS", "Copy " function by pushing the TODA", and "Copy TODD" Push the "1" key to exit the OSD "2" key and the power button functions Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 25 Input a 1600x1200 / 60Hz, 16 gray-level pattern at 100IRE, with brightness set to 100% and contrast set to 100%. 5.2.2.7.4 Verify that under the 9300K / 6500K / 5400K / 5000K settings, no more than 4 of the 16 grays are saturated. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 26 Set the color temperature mode to sRGB and press the 2 Key. The R, G, B, Gain value will be adjusted; note the values. 5.3.3.2 Repeat for each color temperature.. 5.3.4 Install Gprobe 5.3.5 Install Gprobe_1601 Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 27 5.3.6 Click Gprobe 4 Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 28 Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 29 5.3.7 Connect ISP Tool Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 30 5.3.7.1 ISP Tools Connect to D-Sub Output 12V Connect to COM 1 5.3.7.2 Connect ISP Tool to “COM1” COM port Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 31 Connect to COM 1 5.3.7.3 Connect ISP Tool to “Display” D-Sub Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 32 Signal cable Connect to D-Sub Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 33 5.3.8 Confirm connection setup Gprobe setting Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 34 Set to “SERIAL1" Set to "COM1" Set to “115200” 5.3.8.1 Open BATCH file in Gprobe 4 Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 35 Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 36 5.3.9 Open VP2000BATCH Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 37 5.3.10 Key in "BATCH VP2000BATCH.TXT" Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 38 5.3.11 Press Enter key Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 39 EEPROM initial (1key + up key + down key + AC Power off/on) 5.3.14 Execute Auto White Balance. 5.3.14.1 Set LCD Monitor to Burn In mode (Down key + 2 key +DC power on). Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 40 (8) Use the hot key function ("1" key + "2" key) to change mode to 720 x 400 / 70 (9) Execute "All mode recall" function (push "2" key + DC power on) Confidential - Do Not Copy ViewSonic Corporation VP2000s...

  • Page 41: Troubleshooting Flow Chart

    D251, IC251, L251, Q255 failure Failure point Check: 1. IC255 is O/P 3.3V. 2. IC253 is O/P 1.8V. IC255, IC253, IC252, IC256 3. IC256 is O/P 2.5V. 4. IC252 is O/P 3.3V. Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 42 AC power on and DC power on Check that C265 positive is at 18V Is LED illuminated? Follow item 6.1 Q258, D252, L263, L254 Verify that C276 pin8 is at 18V. Inverter failure Q251, Q262 failure Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 43 IC606, IC607 Failure Keypad does not work. Verify that the cable between the interface board and key board is properly connected. Failure point Failure point Q401. Q402. Q403, Q404 failure The keypad is disconnected. Confidential - Do Not Copy ViewSonic Corporation VP2000s...

  • Page 44: Recommended Spare Parts List

    TAPE AL FOIL W=25 #80023 CATERON M-MS-0808-1679 3222201300 0.18 TAPE AL FOIL W=50 TAPE AL-35FR 3M Added: 03/01/05 M-00001850 3222201510 0.11 TAPE PE W=50 VIEWSONIC SECURITY M-MS-0808-0918 3221903300 1.028 TAPE W=10 #1350F-1 3M Added: 03/01/05 M-MS-0808-8202 3220133600 0.04 TAPE W=16 #897 3M...
  • Page 45 Description Item ECR/ECN ViewSonic P/N Ref. P/N Universal number# Q'ty PALLET FUMIGATE 1120*690*120 Added: 03/01/05 M-MS-0808-3374 3524009701 0.063 PE BAG 300*200*0.06T M-MS-0808-8762 3500937501 PE BAG 740*580*.06T CLEAR M-MS-0808-2667 3500939901 PE BAG 75*75*160L T.1 M-MS-0808-2671 3500943900 HANDLE PE 162*40.5 T1.5 BOTTOM NO5...
  • Page 46 PLASTIC ABS 94HB 41 SD-0150 #N/A 4020371614 PLASTIC ABS 94HB 41 PA-707 M-CV-0830-2602 3368222700 CABINET ASSY L20CBR05DDB S0LRA1AT M-MS-0808-8758 3200651100 NAME PLATE VIEWSONIC ABS 41 82.83*34.98 #N/A 4020371607 PLASTIC ABS 94HB 41 D-180 #N/A 4020371608 PLASTIC ABS 94HB 41 HF-380 #N/A 4020371609...
  • Page 47 Universal Item ViewSonic P/N Ref. P/N Description Location Q'ty number# M-SCW-0824-0779 3109017700 SCREW T M3*2.7*7.5 FF C S18C ZN YEL M-SCW-0824-0780 3109019100 SCREW T M3*2.7*7.2 FLAT C S18C ZN YEL M-CV-0830-2459 3361207500 COVER STAND FRONT ABS 41 S8LBB1LS #N/A 4020371607...
  • Page 48 Universal Item ViewSonic P/N Ref. P/N Description Location Q'ty number# M-MS-0808-8628 3460149900 BRACKET IF&POWER SECC 95*39.2 T.8 M-BK-0805-0113 3460190600 BRACKET PANEL SECC 433.4*216.3*42 T.8 LG A-00001842 4900210180 POWER SUPPLY 60W 18V 3.33A E-R-0405-3195 0013102000 RES CF 1/4W 1K J R117...
  • Page 49 Universal Item ViewSonic P/N Ref. P/N Description Location Q'ty number# #N/A 242017400206 FET 600V 10A 0.75ohm SC-67 Q101 #N/A 2500004210 IC VOL ADJ 37V 2.5V 1% T92 IC201 #N/A 2500004213 IC VOL ADJ 37V 2.5V 1% T92 IC201 #N/A 2500004214 IC VOL ADJ 37V 2.5V 1% T92...
  • Page 50 Universal Item ViewSonic P/N Ref. P/N Description Location Q'ty number# E-D-0403-2131 203812570431 DIO ZEN 0.5W 7.78-8.19V MINIMELF E-D-0403-2132 203812570436 DIO ZEN 0.5W 7.78-8.19V LLDS(MINIMELF) #N/A 203812620131 DIO ZEN 0.5W 12.55-13.21V MINIMELF #N/A 203812620136 DIO ZEN 0.5W 12.55-13.21V LLDS(MINIMELF) D10,D11,D12,D13,D14,D15,D1 #N/A 204520700205 DIO SW 0.215A 70V SOT-23 SE.
  • Page 51 Universal Item ViewSonic P/N Ref. P/N Description Location Q'ty number# E-R-0405-7043 0343392300 RES CH 1/10W 3.9K J 0603 R254 E-R-0405-6690 0343470300 RES CH 1/10W 47 J 0603 R607,R610,R627,R628 #N/A 0343471100 RES CH 1/8W 470 J 0805 R447,R449 E-R-0405-7033 0343471300 RES CH 1/10W 470 J 0603...
  • Page 52 Universal Item ViewSonic P/N Ref. P/N Description Location Q'ty number# C440,C611,C612,C613,C614,C E-C-0405-4321 15A7691100 CAP MC CP 10V 10U Z Y5V 0805 615,C616,C626 #N/A 202351580023 DIO SBD 5A 40V DO-201AD D252 #N/A 203812540231 DIO ZEN 0.5W 4.94-5.20V MINIMELF D254,D602,D605,D606,D608 #N/A 203812540236 DIO ZEN 0.5W 4.94-5.20V LLDS(MINIMELF)
  • Page 53 Universal Item ViewSonic P/N Ref. P/N Description Location Q'ty number# #N/A 3075353143 CONN D-SUB FEMALE 15P P2.29 BLUE PL-00000474 3075415766 CONN FFC/FPC BOTTOM 30P P1.0 SMT #N/A 3075415866 CONN FFC/FPC BOTTOM 8P P1.0 SMT M-LB-0813-0913 3202005900 LABEL SERIAL 42*11 SONY...

  • Page 54: Exploded Diagram And Spare Parts List

    8. Exploded Diagram and Spare Parts List Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 55 BRACKET VESA SECC 110*20 T1 C-BC-0302-0627 3360255300 CABINET BACK ABS 41 SOLRA1AT M-CV-0830-2462 3361207800 COVER BASE ABS 41 S8LBB1LS M-MS-0808-8758 3200651100 NAME PLATE VIEWSONIC ABS 41 82.83*34.98 M-CV-0830-2458 3361207400 COVER VESA ABS 41S8LBB1LS M-CV-0830-2463 3361207900 COVER HINGE1 ABS 41 S8LBB1LS M-CV-0830-2464 3361208001...
  • Page 56 9. Block Diagram ENABLE Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 57 10. Schematic Diagrams Power Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 58 Main Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 59 Main Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 60 Main / Key Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 61 Power Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 62 Inverter Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 63 11. PCB Layout Diagrams Main Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 64 Main Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 65 Power Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 66 Power Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 67 Inverter Board Confidential - Do Not Copy ViewSonic Corporation VP2000s...
  • Page 68 Inverter Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation VP2000s...

  • Page 69: Block Diagram

    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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