ViewSonic VP201b-1 Service Manual
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ViewSonic VP201b-1 Service Manual

ViewSonic VP201b-1 Service Manual

20" color tft lcd display
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Service Manual

ViewSonic VP201b/s-1
Model No.
VLCDS26064-2W/-4W
20" Color TFT LCD Display
(VP201b/s-1_SM_685 Rev. 1d May. 2005)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic VP201b/s-1 Model No. VLCDS26064-2W/-4W 20" Color TFT LCD Display (VP201b/s-1_SM_685 Rev. 1d May. 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 VP201b/s-1...

  • 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 VP201b/s-1...
  • 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 VP201b/s-1...

  • Page 6: Specification

    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 VP201b/s-1...
  • 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 VP201b/s-1...
  • 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 VP201b/s-1...
  • 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 VP201b/s-1...
  • Page 10 “TTL” DVI-D single link cable. 3.2.2 Test conditions: a. Resolution: 1600x1200; refresh rate: 75KHz vertical / 60Hz horizontal. b. 16, 32, 64, and 256-level horizontal gray scales.. c. 16, 32, 64, and 256-level vertical gray scales.. Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 11 6. DDC test. DDC / EDID specification compliance requirement. The data that is transmitted shall be stored in the monitor in non-volatile memory, which is a requirement of the VESA EDID version 3.0 standard. Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 12 70.087 70.087 49.673 59.940 66.667 72.809 75.000 85.008 70.087 56.250 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 VP201b/s-1...
  • Page 13 ＋ ＋ ＋ － ＋ 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 VP201b/s-1...
  • Page 14 Appendix B: DDC contents. a. 128 bytes of EDID code for VP201s analog. b. 128 bytes of EDID code for VP201s digital. Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...

  • Page 15: 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 VP201b/s-1...
  • Page 16 • 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 VP201b/s-1...
  • Page 17 5000K — Adds blue and green to the screen image for a darker color. User Color — Individual adjustments for red (R), green (G), and blue (B). To select color (R, G or B) press button [2]. ▲ ▼ To adjust selected color, press Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 18 1:1 adjusts the video signal so that the height and width of the picture are the same. adjusts the video signal to fill the screen. Fill all maintains the correct video signal proportions Fill Aspect Ratio for different resolutions. Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 19 OSD Timeout screen is displayed. For example, with a “15 second” setting, if a control is not pushed within 15 seconds, the display screen disappears. Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 20 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 VP201b/s-1...

  • Page 21: Circuit Description

    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 ganged over-current protection and power control. Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...

  • Page 22: 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 VP201b/s-1...
  • Page 23 5400K, 5000K to adjust” RGB gain and “save color” Select “Copy TODS”, “Copy Push Do “All mode recall” function TODA”, and “Copy TODD” push “2 key + DC power” Exit adjust OSD Function Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 24 5.2.2.7.3 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 VP201b/s-1...
  • Page 25 5.3.3.1 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 VP201b/s-1...
  • Page 26 5.3.6 Click Gprobe 4 Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 27 Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 28 5.3.7 Connect ISP Tool 5.3.7.1 ISP Tools Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 29 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 VP201b/s-1...
  • Page 30 Connect to COM 1 5.3.7.3 Connect ISP Tool to “Display” D-Sub Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 31 Signal cable Connect to D-Sub Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 32 5.3.8 Confirm connection setup Gprobe setting Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 33 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 VP201b/s-1...
  • Page 34 Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 35 5.3.9 Open VP2000BATCH Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 36 5.3.10 Key in “BATCH VP2000BATCH.TXT” Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 37 5.3.11 Press Enter key Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 38 5.3.14.1 Set LCD Monitor to Burn In mode (Down key + 2 key +DC power on). 5.3.14.2 Set LCD Monitor to Factory mode (1 key + +DC power on). 5.3.14.3 Enter Factory Mode (press up key). 5.3.14.4 Recover color temperature settings: Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 39 (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 VP201b/s-1...

  • Page 40: 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 VP201b/s-1...
  • Page 41 AC power on and DC power on Check that C265 positive is at 18V LED is light or not? Follow item 6.1 Check C276 pin8 is 18V Q258, D252, L263, L254 Inverter failure Q251, Q262 failure Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 42 IC606, IC607 Failure Keypad cannot work. Check the the cable is fully conneted between the interface board and key board Failure point Failure point Q401. Q402. Q403, Q404 failure The keypad is disconnected. Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...

  • Page 43: Recommended Spare Parts List

    7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VP201b-1 for "AUO Panel") ViewSonic Model Number: VLCDS26064-2W Rev: 1e Item Description ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Q'ty Accessories: AC POWER CORD L=1800 BLK NA #18*3C SVT C...
  • Page 44 Item Description ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Q'ty Plastics: HANDLE PE 162*40.5 T1.5 BOTTOM NO501 M-MS-0808-2660 3470903500 HANDLE PE 209*18 T1.8 TOP NO501 M-MS-0808-2662 3470903600 POWER KNOB POM M270 MIDNIGHT GRAY S8LRB1 PL-NB-0707-0192 3360624900 RUBBER PAD 25*10*1.5 BLACK STICK...
  • Page 45 3240160801 TAPE AL FOIL W=25 #80023 CATERON M-MS-0808-1679 3222201300 0.465 TAPE AL FOIL W=50 TAPE AL-35FR 3M M-00001850 3222201510 0.11 TAPE PE W=50 VIEWSONIC SECURITY M-MS-0808-0918 3221903300 1.028 TAPE W=10 #1350F-1 3M M-MS-0808-8202 3220133600 0.04 TAPE W=16 #897 3M M-MS-0808-1680 3222400310 0.03...
  • Page 46 Item Description ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Q'ty Plastics: HANDLE PE 162*40.5 T1.5 BOTTOM NO501 M-MS-0808-2660 3470903500 HANDLE PE 209*18 T1.8 TOP NO501 M-MS-0808-2662 3470903600 NAME PLATE VSC 3-BIRD LOGO AL 11.07*7.92 M-MS-0808-8556 3200649100 POWER KNOB POM 901U 5140 S8LFB1LS...
  • Page 47 BOM LIST (VP201b-1 for "AUO Panel") ViewSonic Model Number: VLCDS26064-2W Rev: 1c Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit E-L-0407-1587 2921021404 CORE BEAD 40*6.5*10 W5H+TAPE E-L-0407-1587 2921021437 CORE BEAD 40*6.5*10 A5 +TAPE M-SW-0815-0224 3000725101 SWITCH MEMBRANCE PET 99.5*9 VP181-2...
  • Page 48 PALLET FUMIGATE 1120*1380*120 M-MS-0808-3374 3524009701 PALLET FUMIGATE 1120*690*120 A-CD-VP181S-2 3532065001 PORTRAIT CD VSC A-CD-0002 V7.5 TAIWAN DC-00001887 3532091300 CD-ROM VSC A-CD-VP201B-1 L20DBW DC-00001888 3532091400 MANUAL PACKING ASSY VSC VP201B L20DBW M-MS-0808-8396 3520094201 PE BAG 260*155*0.1T #N/A 5010009200 MANUAL QSG VP201B L20DBW...
  • Page 49 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit M-MS-0808-8628 3460149900 BRACKET IF&POWER SECC 95*39.2 T.8 HW-00002550 3460213800 BRACKET PANEL SECC 433.4*171.3*8.1 T.8 A-00001842 4900210180 POWER SUPPLY 60W 18V 3.33A E-R-0405-3195 0013102000 RES CF 1/4W 1K J R117 #N/A 0013272000 RES CF 1/4W 2.7K J...
  • Page 50 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit #N/A 2811100380 TRANSFORMER SMT 0.48MH J T101 #N/A 2817186980 LINE FILTER T10 638uH MIN FL101 #N/A 2817242080 LINE FILTER T16 17.5mH MIN FL102 E-L-0407-0494 2921020100 CORE BEAD 3.5*6*1.0 T/R FB101,FB102,FB103,FB104 #N/A 2970046403 PWB S 0 E1 CEM-1 118.5*115*1.6(POWER BD)
  • Page 51 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit #N/A 251030130F IC DUAL CCFL INVERTER CONTROLL SSOP-30P #N/A 2801978900 TRANSFORMER IT UI-11.7 00A-2350C T1,T2,T3,T4,T5,T6 #N/A 2970046602 PWB D0 E1 FR-4 180*60*1.6 (L20C-3) #N/A 3070074766 HEADER BOX 94V0 9-5P P2.0 R SMD...
  • Page 52 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit C267,C278,C401,C411,C424, E-C-0404-5322 149024701208 CAP AL CP 6.3V 47U M 5*5.5 C433,C441,C449,C457,C477, C960,C982 C267,C278,C401,C411,C424, #N/A 149024701233 CAP AL CP 6.3V 47U M 5*5.4 C433,C441,C449,C457,C477, C960,C982 #N/A 149101021533 CAP AL CP 10V 1KU M 10*10...
  • Page 53 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit #N/A 2500082837 IC REGU LDO 3.3V 5A TO-252 IC252 E-IC-0401-2927 2500088636 IC VOL DETECTOR 4.4V SOT-23 IC402 #N/A 2500161537 IC REGU LDO 1.8V 5A TO-263 IC253 #N/A 2510019129 IC PWM SOP-16P...
  • Page 54 PLASTIC ABS 94HB 41 SD-0150 #N/A 4020371614 PLASTIC ABS 94HB 41 PA-707 C-00001895 3368223600 CABINET ASSY L20DBR05AAB 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 55 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit M-SCW-0824-0782 3105280200 SCREW M M3*0.5*4 FF C S18C ZN BLK 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...
  • Page 56 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit M-MS-0808-8396 3520094201 PE BAG 260*155*0.1T #N/A 5010009100 MANUAL QSG VP201S L20DBR CB-00001886 3670627400 WIRE WITH HOUSING 1007 #26 L25 6P #N/A 3679046000 WIRE WITH HOUSING 1571 #28 L155 30P #N/A 3790188200...
  • Page 57 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit #N/A 2310040207 PHOTO 70V 4PIN 160-320% 10.16mm IC102 #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...
  • Page 58 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit #N/A 210522000507 TR 40V 0.6A SOT-23 80 Q12,Q17 E-Q-0402-7018 211522000405 TR -40V -0.6A SOT-23 100 #N/A 211522000407 TR -40V -0.6A SOT-23 100 Q1,Q10,Q11,Q18,Q2,Q20,Q3, E-Q-0402-1554 242522500005 FET 60V 0.115A 7.5OHM LL SOT-23...
  • Page 59 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit RP401,RP402,RP403,RP404, RP405,RP406,RP407,RP408, #N/A 0619901105 RES ARRAY 1/16W 33 J 8P4R 1206 RP409,RP410,RP411,RP412, RP413 RP401,RP402,RP403,RP404, RP405,RP406,RP407,RP408, #N/A 0619901112 RES ARRAY 1/16W 33 J 8P4R 1206 RP409,RP410,RP411,RP412, RP413 #N/A 0730060412 CRYSTAL 14.318MHZ 30PPM 30PF 49US...
  • Page 60 Item ViewSonic P/N Ref. P/N Description Location Q'ty Unit #N/A 211522000205 TR -40V -0.2A SOT-23 100-300 Q401,Q402 #N/A 211522000207 TR -40V -0.1A SOT-23 100-300 Q401,Q402 E-Q-0402-7018 211522000405 TR -40V -0.6A SOT-23 100 Q254,Q257 #N/A 211522000407 TR -40V -0.6A SOT-23 100...

  • Page 61: Exploded Diagram And Spare Parts List

    8. Exploded Diagram and Spare Parts List Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 62 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 63 9. Block Diagram Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 64 10. Schematic Diagrams Power Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 65 Main Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 66 Main Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 67 Main / Key Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 68 DVI Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 69 Power Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 70 Inverter Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 71 11. PCB Layout Diagrams Main Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 72 Main Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 73 Power Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 74 Power Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 75 Inverter Board Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...
  • Page 76 Inverter Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation VP201b/s-1...

  • Page 77: 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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