Service Manual ViewSonic VG910s/b-1 Model No. VLCDS27944-3W/-4W 19” Color TFT LCD Display (VG910s/b_SM_721 Rev. 1a Mar.
Copyright Copyright ¤ 2003 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 2 3. Front Panel Function Control Description 13 4. Circuit Description 19 5. Adjusting Procedure 20 6. Trouble Shooting Flow Chart 23 7. Recommended Spare Parts List 29 8. Exploded Diagram And Spare Parts List 47 9. Block Diagram 51 10. Schematic Diagrams 52 11.
1. Precautions and Safety Notices Prior to using this manual, please ensure that you have carefully followed all the procedures outlined in the user manual for this product. • Read all of these instructions. • Save these instructions for later use. • Follow all warnings and instructions marked on the product. • Do not use this product near water. • This display should be installed on a solid horizontal base. • When cleaning, use only a neutral detergent cleaner with a soft damp cloth.
2. Specification 2.1 General Description LCD Fujitsu FLC48SXC11V AU M190EN02V2 Active matrix thin-film-transistor (TFT) Type No: FLC48SXC11V/M190EN02V2 19.0 inches diagonal Active screen Size 376.32mm (H) × 301.056mm (V) Effective Display Size 0.294mm (H) × 0.294mm(V) Pixel Pitch 1280×1024 (SXGA ) Pixel Format 250cd/m 2 (Typ. ) Brightness 600:1 (Typ.
Regulatory Standards UL, cUL, FCC-B, CB, CE, EPA, NOM, TUV/GS, TUV ERGO (covers ISO13406-2 & MPRII), NEMKO, SEMKO, DEMKO, FIMKO, GOST-R + 20 ORIGINAL COPIES HYGIENIC, PCBC, VCCI, BSMI, CCEE, PSB,C-TICK, TUV-S , TCO'99(VG910b), TCO'03(VG910s), Energy, Energy Star, PCT, Taiwan Green Mark Tilt Angle 20° up / 5° down VESA DDC 2B compatible Others 2.2 Electrical Characteristics 2.2.1 Power Supply AC Input Voltage AC 100~240V / 47.
AC power Off - - - Off Off DC power Off - - - <1W Off 2.3 Video alignment 2.3.1 COLOR TEMPERATURE ALLIGMENT a. APPLY VESA 1280x1024 / 60Hz , FULL WHITE PATTERN.( INPUT SIGNAL LEVEL =0.7Vp-p ) b. AUTO WHITE BANLANCE MUST BE FINISH AT 32 GRAY PATTERN BEFORE AUTO ALIGNMENT, c.
2.3.4 LUMINANCE TEST 2.3.4.1 SET COLOR Temperature TO 9300°K APPLY VESA 1280x1024/60Hz , APPLY FULL WHITE PATTERN, ADJUST OSD BRIGHTNESS = 100%, CONTRAST = 70%. 1. THE LUMINANCE MEASURE SHOULD BE OVER 155cd/m 2 2.3.4.2 SET COLOR Temperature TO 6500°K APPLY VESA 1280x1024 / 60Hz , APPLY FULL WHITE PATTERN, ADJUST OSD BRIGHTNESS = 100%, CONTRAST = 70% 1. THE BRIGHTNESS MEASURE SHOULD BE OVER 190cd/m 2 2. SET BRIGHTNESS =100% , CONTRAST=100% ,THE LUMINANCE MEASURE SHOULD BE OVER 220cd/m 2 2.3.4.
2.
2.5 EDID SERIAL NO. FORMAT 2.5.1 EDID for VG910s 2.5.1.1 Analog EDID 128 BYTES OF EDID CODE: 2.5.1.
2.5.2 EDID for VG910b 2.5.2.1 Analog EDID 128 BYTES OF EDID CODE: 2.5.2.
APPENDIX A : PRESET TIMING CHART Analog Mode 1 2 3 TEXT mode TEXT mode VGA H-frequency (kHz) 31.468 31.469 31.468 35.001 37.5 37.862 43.269 V-frequency (Hz) 70.087 70.087 59.941 66.667 75 72.807 85.005 Pixel rate (MHz) 25.175 28.322 25.175 30.240 31.5 31.501 36.
15 16 17 18 19 20 21 XGA XGA XGA XGA SXGA 720P SXGA H-frequency (kHz) 56.476 58.099 60.023 68.677 63.981 45.000 79.976 V-frequency (Hz) 70.069 72.082 75.029 84.997 60.02 60.00 75.025 Pixel rate (MHz) 75.000 78.084 78.750 94.500 108 74.
Digital Mode 1 2 3 4 TEXT mode TEXT mode VGA VGA H-frequency (kHz) 31.468 31.469 31.468 31.468 37.5 37.862 43.269 V-frequency (Hz) 70.087 70.087 70.000 59.941 75 72.807 85.005 Pixel rate (MHz) 25.175 28.322 25.175 25.175 31.5 31.501 36.
16 17 18 19 XGA XGA XGA SXGA HD-720P H-frequency (kHz) 58.099 60.023 68.677 63.981 45.000 V-frequency (Hz) 72.082 75.029 84.997 60.02 60.00 Pixel rate (MHz) 78.084 78.750 94.500 108 74.
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 9. Main Menu with OnView controls Front Control Panel shown below Speaker Speaker Scrolls through menu options and adjusts the displayed control.
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 you want to adjust, press ▲ or ▼ to scroll up or down the Main Menu. 3 After the control is selected, press button [2]. A control screen like the one shown below appears. The line at the bottom of the screen tells you what you can do next: Exit or select the Brightness control.
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 obtain a sharper image. 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 Color Adjust provides several color adjustment modes: preset color temperatures and RGB which allows you to adjust red (R), green (G), and blue (B) separately. The factory setting for this product is 6500K (6500 Kelvin). sRGB — sRGB is quickly becoming the industry standard for color management, with support being included in many of the latest applications. Enabling this setting allows the LCD display to more accurately display colors the way they were originally intended.
Control Explanation Information displays the timing mode (video signal input) coming from the graphics card in your computer. See your graphic card’s user guide for instructions on changing the resolution and refresh rate (vertical frequency). NOTE: VESA 1280 x 1024 @ 60 Hz (recommended) means that the resolution is 1280 x 1024 and the refresh rate is 60 Hertz. Manual Image Adjust displays the Manual Image Adjust menu.
Control Explanation Setup Menu displays the menu shown below. The Setup Menu controls are explained below: Language allows you to choose the language used in the menus and control screens. Resolution Notice displays the Resolution Notice menu shown below. Resolution Notice advises the optimal resolution to use. OSD Position allows you to move the on-screen display menus and control screens. OSD Timeout sets the length of time an on-screen display screen is displayed.
4. Circuit Description 4.1 Power supply (DC/DC Converter): 4.1.1 IC251 MP1583 is a switching regulator controller that uses PWM method. That can be used for DC to DC conversion for step-down. It converts a 12V DC into regulated and stable output voltage of 5V. 4.1.2 Regulator: IC253 function is to convert a 5V into regulated and stable O/P 3.3V. D252, D253 are 3.3V convert 2.5V. 4.2 DDC data select: 4.2.1 IC601(AT24C02) saves D-SUB DDC data. 4.2.2 IC602(AT24C02) saves DVI, DDC data. 4.
5. Adjusting Procedure 5.1 General. 1. All specification 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. 5.2.1.1 Preset condition. 5.2.1.1.1 Setting the contrast to 70%, brightness to 100%. 5.2.1.1.2 Input 1280x1024 / 60Hz, 16 gray pattern (input level 100IRE 0.7Vp-p), then press “RGB RESET”.
6. Trouble Shooting Flow Chart 6.1 No power. Check that CN251 pin1, 2 are approximately 12V Yes No Failure point Check that FB251, FB252, F251 are 12V 1. Power board failure. 2. Disconnected between CN251 and power board. No Failure point FB251, FB251, F251 failure Yes Check that C255 positive is at 5V. No Failure point P251, IC251, L251 failure Yes Check: 1. C262 is O/P 2.5V. 2. IC253 is O/P 3.3V.
6.2 No display on screen (Screen is black, LED is off). AC power on and DC power on no picture LED is off Yes Yes Check that C255 positive is at 5V Check that the voltage level of CN251 is approximately 12V No Yes No Check CN302 pin8 is 12V, pin3 is 5V Yes Inverter failure Power board failure IC251 failure No 1. Check Q309, Q310 pin. 2.
6.3 No display on screen (LED is green). Is the backlight lit? Yes No Check that the cable is fully connected between the inverter and interface board. Check that the cable is fully connected to CN401 Failure point No The cable is disconnected No Yes Failure point Check: 1. C262 is O/P 2.V. 2. IC253 is O/P 3.3V. The cable is disconnected Yes No Failure point Yes Check CN302 pin8 is 12V, pin3 is 5V 1. D252, D253 failure. 2. IC253 failure. Check C255 is O/P 5V.
6.4 Show “No signal” on screen. Check that signal level of R612, R613, R614, R641, R642, R643, R644, R645, R646, R647, R648 Yes No Failure point No Check the Hsync and Vsync 6.5 1. IC401 failure. 2. Signal cable is disconnected. Keypad cannot work. Check the the cable is fully conneted between the interface board and key board Yes No Failure point Failure point 1. D305, D306 ~ D311, D312 failure. 2. TACT switch failure. The cable is disconnected.
6.
Confidential - Do Not Copy ViewSonic Corporation 28 VG910s/b
7.
VG910b Recommended Spare Parts List Item 62 63 64 65 66 67 68 69 70 71 72 73 74 ViewSonic P/N M-MS-0808-8563 M-BK-0805-0048 M-BK-0805-0049 M-BK-0805-0050 M-MS-0808-9144 M-MS-0808-9145 M-MS-0808-9130 M-MS-0808-9131 M-BK-0805-0043 M-BK-0805-0044 P-FM-0602-0851 P-FM-0602-0852 M-MS-0808-9132 Ref. P/N 3460146300 3460165200 3460165300 3460165401 3460165500 3461235402 3461752700 3461752800 3461753201 3461753301 3500117000 3500117100 3500932402 Description BRACKET KEYLOCK SECC 20.4*16.45*4.9 T.
Revised: 1/7/04 VG910s Recommended Spare Parts List 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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 ViewSonic P/N A-PC-0106-0193 M-MS-0808-9140 A-AU-0120-0033 A-VC-0101-0359 M-FC-0809-0790 A-PC-0106-0150 M-SCW-0824-0410 M-SCW-0824-0734 M-SCW-0824-0690 M-SCW-0814-0691 M-SCW-0814-0692 M-SCW-0824-6793 M-SCW-0824-6793 M-SCW-0824-6793 M-SCW-0824-0776 M-SCW-0824
Revised: 1/7/04 VG910s Recommended Spare Parts List Item 69 70 71 72 73 74 ViewSonic P/N M-MS-0808-9131 M-BK-0805-0043 M-BK-0805-0044 P-FM-0602-0851 P-FM-0602-0852 M-MS-0808-9132 Ref. P/N 3461752800 3461753201 3461753301 3500117000 3500117100 3500932402 Description HINGE-L SUS304 62*20 T2 BRACKET ARM SECC 156*126.1*153.6 T2 BRACKET BASE SECC 266.6*161.4 T2 END BLOCK-TOP L19BMR05AAB END BLOCK-BOTTOM L19BMR05AAB PE BAG 640*580*.06T CLEAR 75 M-MS-0808-8762 3500937501 PE BAG 300*200*0.
VG910b BOM LIST Item 1 ViewSonic P/N A-PC-0106-0193 Ref. P/N 3070000501 Description AC POWER CORD L1800 BLACK EURO Location Q'ty 1 2 A-AU-0120-0033 3080005100 CABLE AUDIO L=1800 BLK PC99 3 A-VC-0101-0359 3080426400 CABLE D-SUB/D-SUB L1800 BLK 20276 4 M-FC-0809-0790 3080517603 CABLE FFC 30P P1.0 L270 T2 5 A-PC-0106-0150 3090107600 AC POWER CORD L=1800 BLACK UL/CSA 6 M-SCW-0824-0410 3100300600 SCREW M M3*0.5*6 PAN C S+P S20C ZN 7 M-SCW-0824-0734 3102710800 SCREW M M4*0.
VG910b BOM LIST Item 56 ViewSonic P/N #N/A 57 58 Ref. P/N Description Location Q'ty 1 M-SCW-0814-0692 3368992301 3105124000 STAND ASSY L18FMW05ABB S8LBA1AT SERVICE SCREW M M4*0.7*6 PAN C S18C NI HINGE R&L+BKT ARM 6 M-SCW-0824-6793 3105125300 SCREW M M4*0.7*6 FF C S18C ZN BLK NYLCOK BKT ATM+BKT BASE 3 59 M-SCW-0824-6793 3105125300 SCREW M M4*0.7*6 FF C S18C ZN BLK NYLCOK BKT BASE+COVER BASE 4 60 M-SCW-0824-0413 3109011400 SCREW T M3*0.
VG910b BOM LIST Item 116 ViewSonic P/N #N/A Ref. P/N 2970040301 Description PWB S0 CEM-1 175*43 (INVERTER BD) Location Q'ty 1 117 B-PS-0204-0059 5600110175 LCD POWER BD ASSY L19BMR 05AAB 1 118 #N/A 2970040002 PWB S0 CEM-1 125*60 (PWR BD) 1 119 M-SCW-0824-0778 3105229400 SCREW M M3*0.5*10 FF C S18C ZN 2 120 M-MS-0808-9125 3110110900 NUT M3*0.
VG910b BOM LIST Item 166 ViewSonic P/N E-C-0404-4875 Ref. P/N 1511545000 Description CAP MC CP 50V 1KP J C0G 0603 Location Q'ty 2 167 E-C-0404-4875 1511545000 CAP MC CP 50V 1KP J C0G 0603 1 15 CAP MC CP 50V .047U K X7R 0603 C819 C301,C302,C303,C304,C305,C306,C3 07,C308,C309,C326,C331,C332,C333, C422,C838 C603,C604,C605,C606,C607,C608 168 E-C-0404-4870 1512454000 CAP MC CP 50V .01U K X7R 0603 169 #N/A 1512457000 170 #N/A 1541577000 CAP MC CP 16V 2.
VG910b BOM LIST Item ViewSonic P/N Ref.
VG910b BOM LIST Item 272 ViewSonic P/N #N/A Ref. P/N 313000000 RES CH 1/4W ZERO J 1206 Description Location J2,R109,R116,R219,R115 273 #N/A 313101000 RES CH 1/4W 100 J 1206 R201,R202 1 274 #N/A 313125000 RES CH 1/4W 1.2M J 1206 R111,R113 1 275 #N/A 313471000 RES CH 1/4W 470 J 1206 R205 1 276 #N/A 313514000 RES CH 1/4W 510K J 1206 R104,R105,R106,R107 4 277 #N/A 341109100 RES CH 1/8W 1.96K F 0805 R215 1 278 #N/A 341185100 RES CH 1/8W 7.
VG910b BOM LIST Item 332 ViewSonic P/N #N/A Ref. P/N 3071297834 Description HEADER NYLON66 94V-0 12P P2.0 CN901 Location Q'ty 1 333 M-WR-0828-0224 3411000300 JUMP WIRE COPPER 0.6*7.5*4.0 J1~J8 8 334 #N/A 3470500600 LED HOLDER NY66 94V-2 OD=8*4 D901 1 335 #N/A 3642321800 WIRE WITH TERMINAL 1015 #18 BLK L155 CND901,902(ESD SOLUTION) 2 336 #N/A 3341732501 HSK PLATE AL110F 46.5*21 T1.5 HS201 1 337 #N/A 3341732602 HSK PLATE AL1100F PICKLING 64*41.
VG910s BOM LIST Item 1 2 ViewSonic P/N A-PC-0106-0193 Ref. P/N 3070000501 Description AC POWER CORD L1800 BLACK EURO A-AU-0120-0033 3080005100 CABLE AUDIO L=1800 BLK PC99 Location Q'ty 1 1 3 A-VC-0101-0359 3080426400 CABLE D-SUB/D-SUB L1800 BLK 20276 4 M-FC-0809-0790 3080517603 CABLE FFC 30P P1.0 L270 T2 1 5 A-PC-0106-0150 3090107600 AC POWER CORD L=1800 BLACK UL/CSA 6 M-SCW-0824-0410 3100300600 SCREW M M3*0.5*6 PAN C S+P S20C ZN 7 M-SCW-0824-0734 3102710800 SCREW M M4*0.
VG910s BOM LIST Item 55 ViewSonic P/N C-FP-0301-0961 Ref. P/N 3361085901 Description F/B ABS SILVER VG910S S9LFC1LS Location 3361086200TL Q'ty 56 C-BS-0303-0511 3368991901 STAND ASSY L18FMR05AAB S8LBA1AT SERVICE 57 M-SCW-0814-0692 3105124000 SCREW M M4*0.7*6 PAN C S18C NI HINGE R&L+BKT ARM 6 58 M-SCW-0824-6793 3105125300 SCREW M M4*0.7*6 FF C S18C ZN BLK NYLCOK BKT ATM+BKT BASE 3 59 M-SCW-0824-6793 3105125300 SCREW M M4*0.
VG910s BOM LIST Item 113 ViewSonic P/N M-MS-0808-9141 Ref.
VG910s BOM LIST Item 161 ViewSonic P/N E-C-0404-4878 Ref.
VG910s BOM LIST Item ViewSonic P/N Ref. P/N Description 210 #N/A 2921093612 BEAD CH 100MHZ 120 OHM 0.
VG910s BOM LIST Item 263 ViewSonic P/N E-Q-0402-1553 Ref. P/N Description 242522500017 FET 60V 0.115A 5OHM LL SOT-23 Q03,Q04,Q05 Location 3 264 #N/A 242601000217 FET 30V 7A 0.028OHM LL SO-8 N+P IC02,IC03,IC04,IC05 4 265 #N/A 2510301254 IC PWM CCFL INVERTER CONTROLLER SOP-20P IC01 1 266 #N/A 2811980980 X'FMR IT 1.2H K T01,T02 2 267 #N/A 3070335534 HEADER NY66 94V0 7P P2.
VG910s BOM LIST Item 322 ViewSonic P/N #N/A Ref. P/N 3075308757 Description CONN D-SUB 15P R/A PC99 W/O SCREW CN602 Location 1 323 #N/A 3075316467 CONN DVI-I 24P P1.905 R CN601 1 324 #N/A 3075353143 CONN D-SUB FEMALE 15P P2.29 BLUE CN602 1 325 #N/A 3075415766 CONN FFC/FPC BOTTOM 30P P1.0 SMT CN401 1 326 #N/A 3076290066 HEADER BOX NY46 94V0 2P P3.5 CN05,CN04,CN03,CN02 4 327 M-WR-0828-0224 3411000300 JUMP WIRE COPPER 0.6*7.5*4.
8.
Confidential - Do Not Copy ViewSonic Corporation 48 VG910s/b
Confidential - Do Not Copy ViewSonic Corporation 49 VG910s/b
Confidential - Do Not Copy ViewSonic Corporation 50 VG910s/b
Confidential - Do Not Copy L 0A 0T 4' XX R E T R E V N I V 2 1L +O R T N O C _ T H G I L K C A B D R A O B 51 L E N A P s n 1 0S i 4 DN P N VO 0 C LC 3 l a t i g i D s n i P 8 x P / I A D S D I V D N E T H G I L K C A B M 2 O 0AR 3TP CAE IDE 11 AL DC SS X T / L C S _ C D D L C S A G V M 25 O 01CR 6-DP CDDE IH E A D S A G V X R / A D S _ C D D 1 0 3U CC IM L 1A 0T 3' XX SS VH L C S D I V D M 1D O 0-C R 6ID P CVD E ID E D YR EA KO B L K P S 3 .
ViewSonic Corporation 10.
ViewSonic Corporation 53 Confidential - Do Not Copy VG910s/b
ViewSonic Corporation 54 Confidential - Do Not Copy VG910s/b
ViewSonic Corporation 55 Confidential - Do Not Copy VG910s/b
ViewSonic Corporation 56 Confidential - Do Not Copy VG910s/b
ViewSonic Corporation 57 Confidential - Do Not Copy VG910s/b
ViewSonic Corporation 58 Confidential - Do Not Copy VG910s/b
ViewSonic Corporation 59 Confidential - Do Not Copy VG910s/b
ViewSonic Corporation 60 Confidential - Do Not Copy VG910s/b
ViewSonic Corporation 61 Confidential - Do Not Copy VG910s/b
11.
Main Board Confidential - Do Not Copy ViewSonic Corporation 63 VG910s/b
Power Board Confidential - Do Not Copy ViewSonic Corporation 64 VG910s/b
Control Board Confidential - Do Not Copy ViewSonic Corporation 65 VG910s/b
*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 after reading VG910s/b 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.
