Service Manual ViewSonic VP2000s Model No. VLCDS26064-4W 20" Color TFT LCD Display (VP2000s_SM_892 Rev. 1b Mar.
Copyright Copyright ¤ 2005 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation.
TABLE OF CONTENTS 1. Precautions and Safety Notices 1 2. Specification 3 3. Front Panel Function Control Description 13 4. Circuit Description 19 5. Adjustment Procedure 20 6. Troubleshooting Flow Chart 38 7. Recommended Spare Parts List 41 8. Exploded Diagram and Spare Parts List 51 9. Block Diagram 53 10. Schematic Diagrams 54 11.
1. Precautions and Safety Notices 1. Appropriate Operation (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) Turn off the product before cleaning. Use only a dry soft cloth when cleaning the LCD panel surface. Use a soft cloth soaked with mild detergent to clean the display housing. Use only a high quality, safety approved AC/DC power cord. Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist or bend the TFT Module even momentarily. When designing the enclosure, it should be taken into consideration that no bending/twisting forces may be applied to the TFT Module from outside. Otherwise the TFT Module may be damaged. (12) The cold cathode fluorescent lamp in the LCD contains a small amount of mercury. Please follow local ordinances or regulations for disposal.
2. Specification A. General specification: LCD panel suppliers: LCD panel specification: Input signals: Input connector: Output connector: Display data channel: Signal frequency range: Resolution: Power supply: Inrush current Power Consumption: LG: LM201U04-A3. AUO: M201UN02 V.3 a. Panel size: 20.1-inch (viewable). b. Driver element: a - Si TFT active matrix. c. Effective display area: 408.0 (H) X 306.0 (V) mm. d. Pixel pitch: 0.255 (H) X 0.255 (V) mm. e. Max. resolution: UXGA (1600X1280 pixel). f.
B. Physical specification: Overall dimension: Weight: Mechanical adjustment: Packaging: a. Height: b. Width: c. Depth: a. Net weight: b. Gross weight: a. Tilt: b. Swivel: c. Height adjust: d. Pivot: a. Carton dimension: 480.55mm. 448.00mm. 266.65mm. 8.5kg. 11.2kg. +25 o ~ -5 o . ± 45 o . 110mm. 90 o . a. Height: 494mm. b. Width: 345mm. c. Depth: 560mm. Accessories: Power cable 1.8m. User guide (English). CD ROM. Warranty card. HD15 - HD15 cable. DVI (D) – DVI (D) cable. 3.
C. OSD Menu Functions 1. Interface board function test. 1.1 Function keys: Power, 1, ▲, ▼, 2. 1.2 Basic function check. 1.2.1 Input 1600x1200 / 60Hz, cross-hatch reverse pattern. 1.2.2 Push “1” & “2” key, select Auto image adjust, Contrast, Brightness, Input select, Color, Manual image adjust, Setup menu, Memory recall function. 1.2.
D. Image Calibration 1 Initial Settings 1.1 Set contrast to 70% and brightness to 100%. 1.2 Input a 640x480 / 60Hz, 5-block (5-MOSAIC) pattern (input level 100IRE 0.7Vp-p), then activate the White Balance function. Set SRBG/9300K / 6500K / 5400K / 5000K, R G B Gain as shown below: R Gain G Gain B Gain 2. 3. 4. 5. 6. 7.
E. Image test 1. Picture size & position. 1.1 Picture size. Input analog timing modes 1 ~ 26 and DVI timing modes 1 ~ 25: H-size: 408mm ± 1mm. V-size: 306mm ± 1mm. (Extra 640x350) 1.2 Screen center. a. 1600x1200: H ± 1mm, V ± 1mm. b. Others modes: H ± 1.5mm, V ± 1mm. g3 1.3 Picture position (refer to FIG.2). H-position: ︱ g3-g4 ︱ ≦ 1.5mm. V-position: ︱ g1-g2 ︱ ≦ 1.5mm. g1 g4 306mm g2 408mm FIG. 2 2. Luminance test. 2.
by pushing button [2]. Recall either Contrast or Brightness settings while the Contrast or Brightness adjustment OSD is active, or recall both Contrast and the OSD is not active. Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 [ 1 ] + [ 2 ]. mode. [ 1 ] + [ UP ] + [ DOWN ]. White Balance (press and hold for 5 seconds). [ 2 ] + [ UP ] + [ DOWN ]. Video Mirror Function [ 1 ] + [ DOWN ]. Power Lock / Power Unlock (press and hold for 10 seconds). [ 1 ] + [ UP ].
7. USB test (VP201s/b only) 7.1 Use a USB test hub such as "UPT2 USB2.0 8-port tester" to test USB up stream and down stream transfers. Each port must pass the test. 7.2 Use a PC to check the USB VID, which should be 0543, and the PID, which should be 1169. 7.3 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).
F. Analog and Digital timing chart. Mode No. 1 2 3 4 5 6 7 8 9 10 TEXT VGA VESA VESA MAC VESA VESA VESA TEXT VESA Mode Name 640 x 640 x 640 x 640 x 640 x 640 x 640 x 640 x 720 x 800 x 350 400 480 480 480 480 480 480 400 600 Horizontal Freq. 31.468 31.468 24.688 31.469 35.000 37.861 37.500 43.269 31.469 35.156 Video clock Freq. 25.175 25.175 ＋ － Sync. Polarity 19.75 － 25.175 30.240 31.500 31.500 36.000 28.322 36.000 － － － － － － ＋ H. total (Dots) 800 800 800 800 864 H. sync.
Mode No. Mode Name Horizontal Freq. (KHz) Video clock Freq. 21 22 23 24 25 26 27 28 APPLE VESA VESA VESA VESA VESA HDTV VESA 1152x 1280 x 1280 x 1280 x 1280 x 1280 x 1280 x 1600 x 870 960 960 1024 1024 1024 720 1200 68.681 60.000 75.231 63.981 79.976 91.146 45.000 75.000 29 30 100.00 108.00 130.00 108.00 135.00 157.50 74.250 162.00 － ＋ － ＋ ＋ ＋ － ＋ Sync. Polarity H. total (Dots) 1456 1800 1728 1688 1688 1728 1650 2160 H. sync. (Dots) 128 112 136 112 144 160 40 192 H.
Appendix B: DDC contents. a. 128 bytes of EDID code for VP2000s analog.
3. Front Panel Function Control Description Adjusting the Screen Image Use the buttons on the front control panel to display and adjust the OnView® controls which display on the screen. The OnView controls are explained at the top of the next page and are defined in “Main Menu Controls” on page 15. Main Menu with OnView controls Front Control Panel shown below in detail Scrolls through menu options and adjusts the displayed control. Also a shortcut to display the Contrast adjustment control screen.
Do the following to adjust the screen image: 1 To display the Main Menu, press button [1]. NOTE: All OnView menus and adjustment screens disappear automatically after about 30 seconds. 2 To select a control to be adjusted, press ▲ or ▼ to scroll up or down in the Main Menu. 3 When the desired control is selected, press button [2]. 4 To adjust the control, press the up ▲ or down ▼ buttons. 5 To save the adjustments and exit the menu, press button [1] twice.
Main Menu Controls Adjust the menu items shown below by using the up ▲ and down ▼ buttons. Control Explanation Auto Image Adjust automatically sizes, centers, and fine tunes the video signal to eliminate waviness and distortion. Press the [2] button to execute the Auto Image Adjust function. NOTE: Auto Image Adjust works with most common video cards. If this function does not work on your LCD display, then lower the video refresh rate to 60 Hz and set the resolution to its pre-set value.
Control Explanation 5400K — Adds green to the screen image for a darker color. 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). 1 2 To select color (R, G or B) press button [2]. To adjust selected color, press ▲ or ▼. 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.
Control Explanation Fine Tune sharpens the image by aligning the video signal phase with display pixels. Scaling adjusts a video input signal at a resolution other than 1600 x 1200 to the native screen size using the following options: 1:1 adjusts the video signal so that the height and width of the picture are the same. Fill all adjusts the video signal to fill the screen. Fill Aspect Ratio maintains the correct video signal proportions for different resolutions.
Control Explanation OSD Position allows the user to move the on-screen display menus and control screens. OSD Timeout sets the length of time an on-screen display screen is displayed. For example, with a “15 second” setting, if a control is not pushed within 15 seconds, the display screen disappears. OSD Background allows the user to turn the On-Screen-Display background on or off. OSD Pivot This function is used to rotate the OSD menu, when the display is changed from Landscape to Portrait mode.
4. Circuit Description 4.1 Power supply (DC/DC Converter): 4.1.1 IC251 BA9741 is a switching regulator controller that uses a PWM method. It is used for DC to DC step-down conversion. It converts 24V DC into regulated and stable output voltages of 18V and 5V. 4.1.2 Regulator: IC252 converts 5V into regulated and stable O/P 3.3V. IC253 converts 5V into regulated and stable O/P 1.8V. IC255 converts 5V into regulated and stable O/P 3.3V. IC256 converts 5V into regulated and stable O/P 2.5V 4.
5. Adjustment Procedure 5.1 General. 1. All specifications must be met over line voltage range of 90VAC to 264VAC 50Hz / 60Hz, unless otherwise specified. 2. Operating temperature range is 0oC to 40oC with a relative humidity of 10% or less to 80%. 3. The monitor must be operational in a usable state within 30 minutes after turn-on. 4. All signal levels are measured assuming termination at the monitor’s input jacks or in its characteristic impedance. 5.
5.2 Instrument alignment. 5.2.1 Adjustment procedure.
5.2.2 Video alignment. 5.2.2.1 Initial Conditions 5.2.2.1.1 Set the contrast to 70% and set brightness to 100%. 5.2.2.1.2 Input a 640x480 / 60Hz 5-block (5-MOSAIC) pattern (input level 100IRE 0.7Vp-p), then adjust the white balance. Set SRBG/9300K / 6500K / 5400K / 5000K, R G B Gain as shown below: R Gain G Gain B Gain 5.2.2.2 5.2.2.3 5.2.2.4 5.2.2.5 5.2.2.6 5.2.2.
5.3 VP2000s Firmware Download Procedure (Gm1601 serial) 5.3.1 Set LCD Monitor to Burn In mode (Down key + 2 key +DC power on). 5.3.2 Set LCD Monitor to Factory mode (1 key + DC power on). 5.3.3 Enter Factory Mode (Press up key). 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.
5.3.
Confidential - Do Not Copy ViewSonic Corporation 25 VP2000s
5.3.
5.3.7.1 ISP Tools Connect to D-Sub Connect to COM 1 Output 12V 5.3.7.
Connect to COM 1 5.3.7.
Signal cable Connect to D-Sub Confidential - Do Not Copy ViewSonic Corporation 29 VP2000s
5.3.
Set to “SERIAL1" Set to "COM1" Set to “115200” 5.3.8.
Confidential - Do Not Copy ViewSonic Corporation 32 VP2000s
5.3.
5.3.10 Key in "BATCH VP2000BATCH.
5.3.
ISP finishes 5.3.12 5.3.13 5.3.14 Remove ISP tool EEPROM initial (1key + up key + down key + AC Power off/on) Execute Auto White Balance. 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: (1) Select D-SUB Input (2) Input a 640x480/60Hz 5-Mosaic pattern (3) Push "up" key to enter factory mode, then select OSD "AutoBI" function. (4) Set color temperature to S-RGB, 9300, 6500, 5400, and 5000; at each setting, adjust the RGB gain and save. (5) Select "CopyToDA", "CopyToDD" functions.
6. 6.1 Troubleshooting Flow Chart No power. Verify that CN251 pin1 is at approximately 24V Yes No Failure point Verify that C281 is at 24V 1. Adaptor failure. 2. Disconnection has occurred between CN251 and Adaptor. No Failure point FB251, FB251 failure Yes Verify that C262 positive is at 5V. No Failure point D251, IC251, L251, Q255 failure Yes Check: 1. IC255 is O/P 3.3V. 2. IC253 is O/P 1.8V. 3. IC256 is O/P 2.5V. 4. IC252 is O/P 3.3V.
6.2 No display on screen (Screen is black, LED is off). AC power on and DC power on Yes Yes Check that C265 positive is at 18V Is LED illuminated? No Yes No Verify that C276 pin8 is at 18V. Yes Inverter failure Follow item 6.
6.3 "No signal" message appears on screen. Verify that signal level of selected input (D-sub, DVI-A or DVI-D) is normal Yes No Failure point Yes 1. IC401 failure. 2. Signal cable is disconnected. Add word "No" below this box. IC606, IC607 Failure 6.4 Keypad does not work. Verify that the cable between the interface board and key board is properly connected. No Yes Failure point Failure point Q401. Q402. Q403, Q404 failure The keypad is disconnected.
7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VP2000s-1) ViewSonic Model Number: VLCDS26064 Rev: 1b Description Item 1 POWER SUPPLY 60W 18V 3.33A Accessories: 2 3 AC POWER CORD L=1800 BLK NA #18*3C SVT C PC Board Assembly: 4 5 6 7 PWB ASSY I/F BD L20DBR 05FAB CABINET ASSY L20CBR05DDB S0LRA1AT COVER VESA ABS 41S8LBB1LS Cabinets: 8 F/B ASSY L20CBR05CDB S0LFA1AT STAND ASSY L20CBR05ADB S8LBB1LS 9 10 DC-AC INVERTER FOR L20DBR CABLE FFC 30P P1.
Description Item 65 66 67 68 69 70 71 72 Plastics: 73 74 75 76 PALLET FUMIGATE 1120*690*120 PE BAG 300*200*0.06T PE BAG 740*580*.06T CLEAR PE BAG 75*75*160L T.1 HANDLE PE 162*40.5 T1.5 BOTTOM NO5 HANDLE PE 209*18 T1.8 TOP NO501 NAME PLATE VSC 3-BIRD LOGO AL 11.0 PLASTIC STRIP W=12 T.5 BLACK POWER KNOB POM 901U 5140 S8LFB1LS RUBBER PAD 22*4 T3 BLK RUBBER PAD 25*10*1.5 BLACK STICK RUBBER SILICON 12*12 T5 ECR/ECN ViewSonic P/N Ref.
BOM LIST (VP2000s-1) ViewSonic Model Number: Rev: 1b Item ViewSonic P/N Ref.
Item ViewSonic P/N Ref.
Item ViewSonic P/N Ref.
Item ViewSonic P/N Ref.
Description Location Universal number# Item ViewSonic P/N Ref. P/N 291 292 293 294 E-D-0403-2131 E-D-0403-2132 #N/A #N/A 203812570431 203812570436 203812620131 203812620136 DIO ZEN 0.5W 7.78-8.19V MINIMELF DIO ZEN 0.5W 7.78-8.19V LLDS(MINIMELF) DIO ZEN 0.5W 12.55-13.21V MINIMELF DIO ZEN 0.5W 12.55-13.21V LLDS(MINIMELF) D20 D20 D19 D19 1 0 1 0 295 #N/A 204520700205 DIO SW 0.215A 70V SOT-23 SE. D10,D11,D12,D13,D14,D15,D1 6,D17,D18,D7,D8,D9 0 296 E-D-0403-2049 204520700207 DIO SW 0.
Description ViewSonic P/N Ref. P/N 338 E-R-0405-7043 0343392300 RES CH 1/10W 3.9K J 0603 R254 1 339 E-R-0405-6690 0343470300 RES CH 1/10W 47 J 0603 R607,R610,R627,R628 4 340 341 #N/A E-R-0405-7033 0343471100 0343471300 RES CH 1/8W 470 J 0805 RES CH 1/10W 470 J 0603 R447,R449 R450,R656 2 2 342 E-R-0405-7031 0343472300 RES CH 1/10W 4.
Item ViewSonic P/N Ref. P/N 367 E-C-0405-4321 15A7691100 368 #N/A 369 Description Location Universal number# Q'ty CAP MC CP 10V 10U Z Y5V 0805 C440,C611,C612,C613,C614,C 615,C616,C626 8 202351580023 DIO SBD 5A 40V DO-201AD D252 1 #N/A 203812540231 DIO ZEN 0.5W 4.94-5.20V MINIMELF D254,D602,D605,D606,D608 5 370 #N/A 203812540236 DIO ZEN 0.5W 4.94-5.20V LLDS(MINIMELF) D254,D602,D605,D606,D608 0 371 372 #N/A #N/A 203812670231 203812670236 DIO ZEN 0.5W 16.82-17.
Item ViewSonic P/N Ref. P/N 423 424 425 426 427 428 #N/A PL-00000474 #N/A M-LB-0813-0913 M-LB-0813-0914 M-LB-0813-0915 3075353143 3075415766 3075415866 3202005900 3202009100 3202215900 Description Location Universal number# CONN D-SUB FEMALE 15P P2.29 BLUE CONN FFC/FPC BOTTOM 30P P1.0 SMT CONN FFC/FPC BOTTOM 8P P1.0 SMT LABEL SERIAL 42*11 SONY LABEL REGISTRATION 40*16 LABEL MCU 11*11 POLYESTER 50# 0 1 1 1 1 0.
8.
EXPLODED PARTS LIST (VP2000s-1) ViewSonic Model Number: VLCDS26064 Rev: 1c Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 ViewSonic P/N C-FP-0301-1024 M-MS-0808-8556 M-LCD-0826-0205 M-BK-0805-0113 A-00001842 B-00001844 M-MS-0808-8561 C-BC-0302-0627 M-CV-0830-2462 M-MS-0808-8758 M-CV-0830-2458 M-CV-0830-2463 M-CV-0830-2464 M-CV-0830-2461 M-MS-0808-8639 M-WR-0828-0739 M-CV-0830-2472 M-MS-0808-8632 M-MS-0808-8635 M-MS-0808-8636 PL-PD-0714-0101 PL-PD-0714-0100
9.
10.
Main Board Confidential - Do Not Copy ViewSonic Corporation 55 VP2000s
Main Board Confidential - Do Not Copy ViewSonic Corporation 56 VP2000s
Main / Key Board Confidential - Do Not Copy ViewSonic Corporation 57 VP2000s
Power Board Confidential - Do Not Copy ViewSonic Corporation 58 VP2000s
Inverter Board Confidential - Do Not Copy ViewSonic Corporation 59 VP2000s
11.
Main Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation 61 VP2000s
Power Board Confidential - Do Not Copy ViewSonic Corporation 62 VP2000s
Power Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation 63 VP2000s
Inverter Board Confidential - Do Not Copy ViewSonic Corporation 64 VP2000s
Inverter Board (Bottom) Confidential - Do Not Copy ViewSonic Corporation 65 VP2000s
*Readers Response* Dear Readers: Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our products. We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation. Assessment A. What do you think about the content of the VP2000s Service Manual? U nit Ex cellent Fair G ood Bad 1. Precautions and Safety Notices 2. Specification 3. Front Panel Function Control Description 4. Circuit Description 5.
