Service Manual ViewSonic VP191b/s-1 Model No. VLCDS25973-2W/3W 19” Color TFT LCD Display (VP191b/s_SM_678 Rev. 1c Oct.
Copyright Copyright ¤ 2004 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 7 4. Circuit Description 17 5. Adjusting Procedure 19 6. Trouble Shooting Flow Chart 42 7. Recommended Spare Parts List 46 8. Exploded Diagram And Spare Parts List 54 9. Block Diagram 69 10. Schematic Diagrams 70 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 high quality and safety approved AC power cord. Disconnect the power plug from AC outlet if the product is not 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 nor bend the TFT Module even momentary. At designing the enclosure, it should be taken into consideration that no bending/twisting forces are applied to the TFT Module from outside. Otherwise the TFT Module may be damaged. (12) Cold cathode fluorescent lamp in LCD contains a small amount of mercury. Please follow local ordinances or regulations for disposal.
2.
2-3 POWER SUPPLY Internal Power Supply Input Voltage Range Input Frequency Range Short Circuit Protection Over Current Protection Leakage Current EFFICIENCY Fuse Power Dissipation Max Input AC Current INRUSH CURRENT (COLD START) Power Supply Cold Start Power Supply Transient Immunity Power Supply Line Surge Immunity Power Supply Missing Cycle Immunity Power Supply Acoustics US Type Power Cable European Type Power Cable CCC Type Power Cable(Color, Black) PSE Type Power Cable(Color, Black) Power Saving Op
Timing Table Item Timing 1 640 x 350 @ 70Hz, 31.5kHz 2 640 x 400 @ 60Hz, 31.5kHz 3 640 x 400 @ 70Hz, 31.5kHz 4 640 x 480 @ 50Hz, 24.7kHz 5 640 x 480 @ 60Hz, 31.5kHz 6 640 x 480 @ 67Hz, 35.0kHz 7 640 x 480 @ 72Hz, 37.9kHz 8 640 x 480 @ 75Hz, 37.5kHz 9 640 x 480 @ 85Hz, 43.27kHz 10 720 x 400 @ 70Hz, 31.5kHz 11 800 x 600 @ 56Hz, 35.1kHz 12 800 x 600 @ 60Hz, 37.9kHz 13 800 x 600 @ 75Hz, 46.9kHz 14 800 x 600 @ 72Hz, 48.1kHz 15 800 x 600 @ 85Hz, 53.7kHz 16 832 x 624 @ 75Hz, 49.7kHz 17 1024 x 768 @ 60Hz, 48.
[▲] Up arrow button [▼] Down arrow button Reaction Time Note: Power Button, Button 1 and Button 2 must be oneshot logic operation. (i.e. there should be no cycling) OSD must fully appear within 0.5s after pushing Button 1 Short Cuts Function from the button(s) [1] Main Menu [2] Input Select [▼] or [▲] to immediately activate Contrast menu.
Function descriptions OSD Lock short cuts function for the buttons The OSD lock will be activated by pressing the front panel control buttons "(1), & (▲)" for 10 seconds. If the user then tries to access the OSD by pressing any of the buttons "1", "▼", "▲", "2" a message will appear on the screen for 3 seconds showing "OSD Locked". The OSD lock will be deactivated by pressing the front panel control buttons "(1), & (▲)" again for 10 seconds. Note1: When the OSD is locked will lock all functions.
Panel Characteristics : 1st Source Panel Model number Type Active Size Pixel Arrangement Pixel Pitch Glass Treatment # of Backlights Backlight Life Luminance (Center) – CT = 6500K, Contrast/ Brightness = Max Brightness Uniformity Contrast Ratio Color Depth Viewing Angle (Horizontal, CR>10) Viewing Angle (Vertical, @ CR>10) Response Time 10%-90% @ Ta=25°C Panel Defects Samsung LTM190E1-L01 PVA type with LVDS interface 376.32 (H) x 301.06 (V) RGB Vertical Stripe 0.
Sharpness Input Priority 720x400/640x400 100% Analog 1Æ Analog 2ÆDVI-D 720x400 Luminance Ly (Max) –Condition: Contrast / Brightness = 100% Color Temperature = 6500K Ly (Def) –Condition: Contrast / Brightness = Default Color Temperature = 6500K Display Size Horizontal Display Size, Primary Preset Vertical Display Size, Primary Preset Saturation Contrast / Brightness = Default Test pattern = 32-gray Contrast / Brightness = 100% Test pattern = 32-gray Preset Color Temperatures Preset 1 Preset 2 (Primary) Pre
Ergonomics Tilt Up Tilt Down Swivel Right Swivel Left Height Adjust Pivot Cabinet Material Display Head Plastic Material Neck/Base Plastic Material Internal Plastic Cabinet Components Front Bezel Color Neck, Base, Speaker Cover, Rear Cover and Rear Logo Color Cabinet Color Drift Due To UV-Light Cabinet Texture Samples From 0º up to ≧20º+/-2º From 0º down to -3º ~ -5 º 45 degrees 45 degrees 0~110 mm 0~90 degrees (Clockwise) PC+ABS (meets UL94V0 degree) PC+ABS (meets UL94V0 degree) All internal plastic ca
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. 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 15 seconds. This is adjustable through the OSD timeout setting in the setup menu. 2 3 To select a control you want to adjust, press ▲ or ▼ to scroll up or down the Main Menu. After the control is selected, press button [2]. A control screen like the one shown below appears.
Main Menu Controls Adjust the menu items shown below by using the up ▲ and down ▼ buttons. Control Explanation Auto Image Adjust sizes and centers the screen image automatically. Contrast adjusts the difference between the image background (black level) and the foreground (white level). Brightness adjusts background black level of the screen image. Input Select toggles between inputs if you have more than one computer connected to the VP191/VP191b/VP191s.
Control Explanation 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. Information displays the timing mode (video signal input) coming from the graphics card in your computer, the LCD model number, the serial number, and the ViewSonic website URL.
Control Explanation Fine Tune sharpens the focus by aligning the text and/or graphic characters. NOTE: Try Auto Image Adjust first. Sharpness adjusts the clarity and focus of the screen image. Setup menu displays the menu shown below: Language allows you to choose the language used in the menus and control screens. Resolution Notice allows you to enable or disable this notice.
Control Explanation Input Priority If multiple computers will be connected to the display, this function can be used to select which computer has priority Depending on the selected Input Priority, the display will do a one time detection for available inputs when first powered on. For example: If the Input Priority setting is D-SUB=>D-SUB2=>DVI, then the first priority will be given to D-SUB1 when the display turns on.
4. Circuit Description 1. Power supply (DC/DC Converter) The AP1501 is monolithic IC designed for M/B DC/DC converter, with the ability of driving a 3A load without any additional transistor component. The AP1501 operates at a switching frequency of 150 kHz and thus allows smaller-sized filter components than would be needed with lower frequency switch regulator. 2. Flash Memory The Pm39LV010R is a 1 Megabit, 3.3 Volt-only Flash Memory organized as 131,072 bytes of 8 bits each.
3. GM5120 The gm5110/20 is a graphic processing IC for Liquid Crystal Display (LCD) monitors at XGA/SXGA resolution. It provides all key IC functions required for the highest quality LCD monitors. On-chip functions include a high-speed triple-ADC and PLL, Ultra-Reliable DVI TM receiver, a high quality zoom and shrink scaling engine, an on-screen display (OSD) controller, digital color controls and an on-chip microcontroller (OCM).
5. Adjusting Procedure 5-1 Function Test and Alignment Procedure 5-1-1 Product 19 LCD Monitor 5-1-2 Test Equipment Color Video Signal & Pattern (or PC with SXGA resolution) 5-1-3 Hot Key 1). All Mode Reset: Press , buttons simultaneously and Power on with signal, hold on for 3 seconds. Then the screen will show All Mode Reset.
2). Burn In Mode: Press , buttons simultaneously and Power on without signal, hold on for 3 seconds. Then the screen will show Burn In Mode. Press 1 button, you can find the information about this monitor. 3). White Balance: Set the screen on 640*480@60Hz resolution pure black and white pattern, no other color. Press 1 , and simultaneously.
4). OSD Lock : Press 1 and buttons simultaneously for 10 seconds, and the OSD will lock. Repeat the action, and the OSD will unlock. 5). Power Lock : Press 1 and buttons simultaneously for 10 seconds, and the Power will lock. Repeat the action, and the Power will unlock.
6). Contrast and Brightness Recall : Press and buttons simultaneously, and the contrast and brightness will restore the factory defaults. 7). Test Mode(720*400)/Graphic Mode (640*400) exchange : Press 1 and 2 buttons simultaneously. 5-1-4 Test Condition Before function test and alignment, each LCD Monitor should be run-in and warmed-up for at least 30 minutes with the following conditions: a). In room temperature, b). With full-white screen, R.G.B. Black c).
5-1-5 Test Display Modes & Pattern . Compatible Modes Analog : Digital : 640 x 350 @ 70Hz, 31.5kHz 640 x 480 @ 60Hz, 31.5kHz 640 x 480 @ 67Hz, 35.0kHz 640 x 480 @ 75Hz, 37.5kHz 640 x 480 @ 72Hz, 37.9kHz 640 x 480 @ 85Hz, 43.27kHz 720 x 400 @ 70Hz, 31.5kHz 800 x 600 @ 56Hz, 35.1kHz 800 x 600 @ 60Hz, 37.9kHz 800 x 600 @ 75Hz, 46.9kHz 800 x 600 @ 72Hz, 48.1kHz 800 x 600 @ 85Hz, 53.7kHz 832 x 624 @ 75Hz, 49.7kHz 1024 x 768 @ 60Hz, 48.4kHz 1024 x 768 @ 70Hz, 56.5kHz 1024 x 768 @ 72Hz, 58.
. Funcation Test Display Patterm Item Test C ontent Pattern Specification R emark 1 Frequency & Tracki ng 2 C ontrast/Bri ghtness 16 Gray Scale 3 Boundary Hori zontal & Verti cal Thi ckness Horz. and Vert. posi ti on of vi deo should be adjustable to be wi thi n the screen Fi gure 3 frame. 4 R,G,B, C olor Performance R.G.B C olor Intensi ti es C ontrast of each R,G,B, color should be normal.
G. Color Pattern (Figure 5) B.
5-1-6 Function Test and Alignment Procedure . All Modes Reset You should do All Mode Reset (Refer to Chapter 6-3) first. This action will allow you to erase all endusers settings and restore the factory defaults. . Auto Image Adjust Please select and enter Auto Image Adjust function on Main Menu to see if it is workable. The Auto Image Adjust function is aimed to offer a better screen quality by built-in ASIC. For optimum screen quality, the user has to adjust each function manually. .
. R,G,B, Color Contrast Test Signal: 1280*1024@60Hz Test Pattern: R,G,B Color Intensities Pattern and 16 Gray Scale Pattern - Check and see if each color is normal and distinguishable. - If not, please return the unit to repair area. . Screen Uniformity and Flicker Test Signal: 1280*1024@60Hz Test Pattern: Full White Pattern - Check and see if it is in normal condition. .
5-2 Firmware Upgrade Procedure 5-2-1 Equipment Needed - VP191 Series Monitor Fixture for Firmware Upgrade Power Adapter (P/N : 47.58201.001) *1 for Fixture VGA Cable (P/N : 42.59901.008) *1 PC (Personal Computer) LTP Cable (P/N : 42.59906.001) *1 Firmware Upgrade Program One additional monitor for checking the program execution VP191 Monitor Fixture Printer Port VGA Cable (P/N: 42.59901.
LTP Cable (P/N: 42.59906.001) Power Adapter for Fixture (P/N: 47.58201.001) 5-2-2 Set-up Procedure 1. 2. 3. 4. 5. Connect P2 of Fixture with printer port of PC by LTP Cable. Connect P1 of Fixture with VP191 Monitor by VGA Cable. Plug Power Adapter to Fixture. Connect Power Cord to VP191 Monitor, and turn on the Power Switch. Connect PC to the additional monitor.
6. Install GProbe Program by selecting and clicking Gprobe icon. Press Yes or Next buttons until the program is finished.
Confidential - Do Not Copy ViewSonic Corporation 31 VP191b/s
Confidential - Do Not Copy ViewSonic Corporation 32 VP191b/s
5-2-3 Firmware Upgrade Procedure 1. Save these three files , and in the computer. 2. Open file. Key in the path where you save the driver and firmware .
3. Execute Gprobe program. 4. Key in batch c:\VP191\bdisp.txt after GProbe :>, then press Enter key to begin programming automatically. the path is where you save
5. The successful picture is as follows : 6. Enter Burn In Mode (refer to Chapter 6-3), and you could find that Serial Number disappears.
7. Turn off the power switch of the rear cover of VP191, and turn it on again. Then enter Burn In Mode, and Serial Number will appear. Check if the version of BIOS is correct. Power Switch 8. Connect the signal, and the monitor will slant to red color. Refer to Chapter 6-3 to do White Balance. 9. At last, do All Mode Reset.
5-3 DDK Key In Procedure 5-3-1 Equipment Needed - VP191 Series Monitor Fixture(V3) for DDC Key In (JP3 must be closed) RS232 Cable (P/N : 42.55907.001) *1 VGA Cable (P/N : 42.59901.008) *2 DVI-DVI Cable *1 PC (Personal Computer) Power Adapter (P/N: 47.56001.501) *1 for Fixture DDC Key In Program One additional monitor for checking the program execution VP191 Monitor Fixture VGA Cable (P/N: 42.59901.008) COM1 : to RS232 Cable PC RS-232 Cable (P/N: 42.55907.
Power Adapter for Fixture (P/N: 47.56001.501) DVI-DVI Cable 5-3-2 Set-Up Procedure 1. 2. 3. 4. 5. 6. Connect P2 and P4 of Fixture with VGA ports of VP191 by two VGA Cables. Connect P3 of Fixture with DVI port of VP191 by DVI-DVI Cable. Connect P1 of Fixture with COM1 of PC by RS232 Cable. Plug Power Adapter to Fixture. Connect Power Cord to VP191 Monitor, and turn on the Power Switch. Connect PC to the additional monitor.
5-3-3 DDC Key In Procedure 1. Select and execute DDC Key In program. 2. Key in the serial number and press Enter key.
3. The successful picture is as follows : (There are checksum values appearing when VGA and DVI success.) 4. Press ~ button (Shift+ ` ) to check DDC CheckSum is correct or not.
5. Enter Burn In Mode (refer to Chapter 6-3). Turn off the power switch of the rear cover of VP191, nd aturn it on again. Then enter Burn In Mode again and Information of OSD Main Menu. Check if the information is correct.
6. Trouble Shooting Flow Chart This chapter provides technicians and people who have an electronic background a primary description about maintaining the product. Moreover, you can get the appropriate operation to solve some complicated problems of component repairing and professional problems.
6-2-1 Power Circuit Troubleshooting Start Change Power Board Change Main Board No Yes Yes End 6-2-2 Performance Troubleshooting Start Is screen black ? Yes No Is screen white ? No No Yes Yes No Abnormal Color ? Change Inverter Board No Change LCD Panel Yes Yes No Replug/Change FPC Cable Yes Yes Change Main Board Change Main Board No Change LCD Panel Yes Change Main Board No Yes Change LCD Panel Yes Yes 1 Confidential - Do Not Copy ViewSonic Corporation 43 VP191b/s
1 Is screen scrolling ? Yes Change VGACable No Is screen flickering ? Yes Yes No Change LCD Panel Yes Change LCD Panel Yes Yes Change Inverter Board No Change LCD Panel Yes Yes Yes Adjust Fine Tune Sharpness or Auto Adjustment No Ghost image ? No Yes No Have line bar or noise? Yes Change Main Board No Bad Uniformity ? Change Main Board Yes No Is LCD line defective ? No No Change Main Board Yes Yes Yes Refer to Notice 1 No Refer to Notice 2 Yes Yes No Adjust F
6-2-3 Control Function Troubleshooting Start Change Control Board Change Main Board No Yes Yes End Confidential - Do Not Copy ViewSonic Corporation 45 VP191b/s
7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VP191b-1) ViewSonic Model Number: VLCDS25973 Rev: 1b Item 1 Accessories: 2 PC Board Assembly: 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 Cabinets: Cables: Documentation: Electronic Components: Miscellaneous: Packing Material: Plastics: Description OPEN FRAME IN:100-240V OUT:12V/4.
RECOMMENDED SPARE PARTS LIST (VP191s-1) ViewSonic Model Number: VLCDS25973 Rev: 1b Item Description 1 OPEN FRAME IN:100-240V OUT:12V/4.16A "TIGER Accessories: 2 PC Board Assembly: OPEN FRAME IN:100-240V OUT:12V/4.
BOM LIST (VP191b-1) ViewSonic Model Number: VLCDS25973 Rev: 1b ViewSonic P/N Part No 1 2 3 4 5 6 7 8 M-LB-0813-0783 M-LB-0813-0781 M-MS-0808-8299 M-CV-0830-2426 M-CV-0830-2431 M-LB-0813-1016 M-LB-0813-0736 M-MS-0808-7800 35.61201.002 35.61203.001 51.58711.002 51.61203.002 51.61212.002 35.00010.002 35.58304.001 35.61202.001 LABEL SPEC 120*50mm VP191b LABEL BAR CODE 50*25mm VP191 NAMEPLATE ELLIPSE CS-VS08 ViewSonic OVAL CAP PC+ABS-VS08A VP191b HINGE CAP-4 PC+ABS-VS08 VP191b LABEL CAUTION HIGH VOLTAGE 25.
Item ViewSonic P/N Part No 59 #N/A 01.22236.501 RES RP 2.2K 5% 1/16W CHIP #0603 60 #N/A 01.30116.501 RES RP 330 1% 1/16W CHIP #0603 61 #N/A 01.33036.502 RES RP 33 5% 1/16W CHIP #0603;"TA-I TECHNOL 62 63 64 65 66 67 #N/A #N/A #N/A #N/A #N/A #N/A 01.33236.501 01.47236.501 01.47239.501 01.51136.501 01.56236.501 01.68036.501 RES RP 3.3K 5% 1/16W CHIP #0603;"TA-I TECHN RES RP 4.7K 5% 1/16W CHIP #0603 RES RP 4.7K 5% 1/10W CHIP #0805 RES RP 510 5% 1/16W CHIP #0603;"TA-I TECHNO RES RP 5.
Item ViewSonic P/N Part No 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A M-MS-0808-6287 M-SCW-0824-6827 M-SCW-0824-0651 M-SCW-0824-6826 M-SCW-0824-6753 M-SCW-0824-6961 M-SCW-0824-6829 M-CV-0830-2429 M-MS-0808-7823 M-MS-0808-7824 PL-CL-0710-0033 M-MS-0808-9911 PL-PD-0714-0091 M-MS-0808-8772 M-MS-0808-8755 #N/A M-CV-0830-2432 M-CV-0830-2427 M-CV-0830-2428 C-BS-0303-0377 M-CV-0830-2430 M-MS-0808-7795 M-MS-0808-7796 M
BOM LIST (VP191s-1) ViewSonic Model Number: VLCDS25973 Rev: 1b Item ViewSonic P/N Part No 1 2 3 4 5 6 7 8 M-LB-0813-0835 M-LB-0813-0781 M-MS-0808-8116 M-CV-0830-2452 M-CV-0830-2455 M-LB-0813-1016 M-LB-0813-0736 M-MS-0808-7800 35.61201.003 35.61203.001 51.58711.001 51.61203.003 51.61212.003 35.00010.002 35.58304.001 35.61202.
Item ViewSonic P/N Part No 59 #N/A 01.22236.501 RES RP 2.2K 5% 1/16W CHIP #0603 60 #N/A 01.30116.501 RES RP 330 1% 1/16W CHIP #0603 61 #N/A 01.33036.502 RES RP 33 5% 1/16W CHIP #0603;"TA-I TECHNOL 62 63 64 65 66 67 #N/A #N/A #N/A #N/A #N/A #N/A 01.33236.501 01.47236.501 01.47239.501 01.51136.501 01.56236.501 01.68036.501 RES RP 3.3K 5% 1/16W CHIP #0603;"TA-I TECHN RES RP 4.7K 5% 1/16W CHIP #0603 RES RP 4.7K 5% 1/10W CHIP #0805 RES RP 510 5% 1/16W CHIP #0603;"TA-I TECHNO RES RP 5.
Item ViewSonic P/N Part No 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A M-MS-0808-6287 M-SCW-0824-6827 M-SCW-0824-0651 M-SCW-0824-6826 M-SCW-0824-6753 M-SCW-0824-6961 M-SCW-0824-6829 M-CV-0830-2453 M-MS-0808-8751 M-MS-0808-8752 M-MS-0808-8753 M-MS-0808-9911 PL-PD-0714-0091 M-MS-0808-8772 M-MS-0808-8755 #N/A M-CV-0830-2457 M-CV-0830-0297 M-CV-0830-0298 M-CV-0830-2456 M-CV-0830-2454 M-MS-0808-7795 M-MS-0808-7796 M-SCW-0824-
8.
EXPLODED PARTS LIST (VP191b-1) ViewSonic Model Number: VLCDS25973 Rev: 1b Item ViewSonic P/N Ref. P/N 1 M-CV-0830-2427 51.61204.002 2 M-CV-0830-2428 51.61205.002 3 M-CV-0830-2429 51.61206.002 4 M-MS-0808-7823 51.61207.002 5 M-MS-0808-7824 51.61208.002 6 M-CV-0830-2430 51.61209.002 7 M-CV-0830-2431 51.61212.002 8 M-MS-0808-8772 61.61204.001 9 PL-CL-0710-0033 51.61213.002 10 M-MS-0808-7795 51.61214.001 11 M-MS-0808-7796 51.61215.001 12 PL-PD-0714-0091 52.61201.001 13 M-MS-0808-8755 61.61205.
EXPLODED PARTS LIST (VP191s-1) ViewSonic Model Number: VLCDS25973 Rev: 1b Item ViewSonic P/N Ref. P/N 1 M-CV-0830-0297 51.61204.003 2 M-CV-0830-0298 51.61205.003 3 M-CV-0830-2453 51.61206.003 4 M-MS-0808-8751 51.61207.003 5 M-MS-0808-8752 51.61208.003 6 M-CV-0830-2454 51.61209.003 7 M-CV-0830-2455 51.61212.003 8 M-MS-0808-8772 61.61204.001 9 M-MS-0808-8753 51.61213.003 10 M-MS-0808-7795 51.61214.001 11 M-MS-0808-7796 51.61215.001 12 PL-PD-0714-0091 52.61201.001 13 M-MS-0808-8755 61.61205.
8-2 Packing for shipping This section provides the package and exploded overview, replaceable parts list. You can place an order for correct parts in the recommended parts list. .
. Package Parts List PACKING PARTS LIST (VP191b-1) ViewSonic Model Number: VLCDS25973 Rev: 1b Item Viewsonic P/N Ref. P/N Description 1 M-LB-0813-0706 35.58203.001 LABEL CARTON 76*76mm 2 A-UG-0107-0532 36.61202.002 USER GUIDE+CD VP191b 3 A-PC-0106-0272 42.50115.001 CABLE POWER CORD 1830mm SP30+IS14 4 M-MS-0808-9911 51.61220.001 PE BAG LDPE 150*65*0.04t mm VP171/191 5 A-VC-0101-0261 42.59901.003 CABLE VGA 15P 1800mm 2*25mm CORE(VP191b/191s) 6 A-VC-0101-0262 42.59902.012 CABLE DVI-D 1.
8-3 Packing Procedure 1. Put the PE bag on the monitor. 2. Lower the stand of the monitor, then put the Cushions on the monitor. 3. Put the monitor into the carton.
Note : Panel should face to the side as the following picture. 4. Put the VGA cable, DVI-D cable, Users Guide and Power Cord into the carton, close the cover of carton and tape. Cables Users Guide 5. Tape the carton closed.
8-4 Procedure of Disassembly 8-4-1 Disassembly of Stand Unit From Monitor 1. Put the monitor facedown. Take off Oval Cap and pry Hinge Cap off. Hinge Cap Oval Cap 1 2. Unscrew four screws that secure Stand unit and detach Stand unit from the monitor. 85.5A124.
3. Unscrew four screws of Base Plate to remove Hinge. 85.4A524.080 X4 3 Hinge Base Plate 4. Unscrew three screws that secure Base Plate to separate Base Plate from Base Cover. 85.YA323.
5. Unscrew two screws that secure Rear Arm to separate Rear Arm from Hinge. 6. Turn Hinge and unscrew two screws that secure Front Arm to detach Front Arm from Hinge. Front Arm Rear Arm 5 6 X2 Hinge X2 85.UA123.080 85.UA123.080 Hinge 8-4-2 Disassembly of Rear Cover 1. Unscrew four screws of Rear Cover, then detach LCD Panel module from Rear Cover. Rear Cover X4 1 85.1F123.
8-4-3 Disassembly of Inverter Board, Main Board and Power Board 1. Unscrew two screws that secure Shielding Plate and remove Shielding Plate. X2 85.AA123.030 1 Shielding Plate 2. Disconnect the wire connect between M/B and Power Board. 3. Unscrew 10 screws that secure M/B Shielding Bracket and remove the EMI tape to remove M/B Shielding Bracket. 2 X7 85.AA123.030 M/B Shielding Bracket 3 X3 85.1C124.
3. Unscrew four screws that secure Power Board to remove Power Board. Detach Power Board Mylar. Power Board 85.1F123.060 X4 3 Power Board Mylar 4. Unscrew two screws that secure Inverter Board and disconect five connectors to remove Inverter Board. 85.1F123.
5. Unscew six hex screws that secure Main Board. 6. Unscrew four screws that secure Main Board to remove Main Board. 7. Disconnect the wires which are connected to Main Board. 7 Main Board 85.1F123.060 X4 X6 5 85.005AG.075 8-4-4 Disassembly of Switch and Inlet Wires 1. Unscrew one screw that secures Inlet Wire and disconnect two wires that are connected to Switch Wire. 2. Use flat screw driver to pull and press out Inlet and Switch Wires.
8-4-5 Disassembly of Front Cover Module and LCD Panel 1. Remove two tapes of Control Board wire and detach Front Cover from LCD Bracket. Front Cover Control Board wire 1 2. Unscrew four screws beside LCD Bracket to detach LCD Panel from LCD Bracket. 85.ZA123.
3. Turn LCD Panel around and remove the tape on the wire to disconnect the wire.
VP191b/s FLASH MEMORY Pm39LV010R DDC EEPROM LVDS DVI TMDS ASIC FJ-11AA PANEL GM5120 VH DDC BLON EEPROM 24LC16B DDC EEPROM 7 of XTAL +12V DPMS 7 VP171 & 191 BLOCK DIAGRAM Document Number ADAPTER Size AC (110-240V) (50-60Hz) +12V +12VIN +5V +3.3VD +3.3VA +2.5V Title 9. Block Diagram 14.
10. Schematic Diagrams U1 AIC1084 3 +5V +12VA VIN VOUT +12VIN 22uH JP1 1 2 3 4 C6 C7 C5 C8 0.1uF C10 0.1uF 470uF/16V 2200uF/16V R2 R3 C11 C12 NC 4.7K 0.1uF 0.1uF 0.1uF BRI 0805 ON TU2001WNR-5P GND C1 1 2 3 4 5 6 7 8 9 10 R1 C2 100uF/16V C3 C4 0.1uF 100uF/16V 330/1% 2 L1 +12VA 1 GND +12VA CN1 +2.5VD 0.1uF R4 330/1% R5 1K 3 BRIGHT +12VA C13 C14 NC NC C15 +3.3VA HEADER 10-2.0 U2 XC6201 100uF/16V C16 100uF/16V 3 1 C17 0.1u 0 C18 C19 0.
DVI_5V DVI_5V 3 D2 DVI_5V 2 JP4 RX2RX2+ GND RX4RX4+ SCL SDA VS RX1RX1+ GND RX3RX3+ 5V GND HP 9 10 11 12 13 14 15 16 RX0RX0+ GND RX5RX5+ GND RXC+ RXC- 17 18 19 20 21 22 23 24 RIN GIN BIN HS GND 25 26 27 28 29 +5V 1 3 DVI-I 1 2 3 4 5 6 7 8 +5V BAV70 SOT23 DVI CONNECTOR RX2RX2+ R17 R18 NC NC 3 3 ISP_SDA ISP_SCL SDA IND SCL IND 3 3 R19 R20 RX1RX1+ R15 R16 2.2K 2.2K C56 0.1u 0.1u C58 0.1uF 100 1 BOOST 2 CAP+ V+ 8 C57 OSC 7 0.
3.3V_DVDD 2.5V_VDD 3.3V_DVDD R56 C83 C84 C85 C86 C87 C88 C89 C90 C91 C92 C93 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C98 C99 C100 C101 C102 C103 C104 C105 C106 C107 C108 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 100pF 100pF on pin-196 2.5V_VDD C115 C116 C117 C118 100uF/16V 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 2.5V_AVDD 2.5V_AVDD C119 100uF/16V C120 3.3V_AVDD 3.
OR7 OR6 OR5 OR4 1 2 3 4 1 2 3 4 100X4 NC 5 6 7 8 NC RP9 1 2 3 4 ER7 ER6 ER5 ER4 1 2 3 4 DRE7 DRE6 DRE5 DRE4 8 7 6 5 4 3 2 1 4 3 2 1 100X4 CP10 NC NC NC 5 6 7 8 CP9 5 6 7 8 CP8 RP12 DGO3 DGO2 DGO1 DGO0 EB3 EB2 EB1 EB0 RP13 DBE3 DBE2 DBE1 DBE0 8 7 6 5 ER3 ER2 ER1 ER0 1 2 3 4 DRE3 DRE2 DRE1 DRE0 8 7 6 5 100X4 4 3 2 1 100X4 4 3 2 1 100X4 1 2 3 4 CP12 CP13 NC NC NC 5 6 7 8 CP11 5 6 7 8 5 RP10 DBE7 DBE6 DBE5 DBE4 8 7 6 5 100X4 8 7 6 5 DBE[0..
3 3 3 3 +3.3VL DHS DVS DEN DCLK C135 C136 100pF 100pF +3.3VL R85 +3.3VD L12 NC +3.3VL R86 Bead /1206 R87 4 DRO[0..7] 4 DGO[0..7] 4 4 4 4 DRE[0..7] 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 DRE7 C141 DRE5 DGE0 0.1uF DGE1 DGE2 DGE6 DBO[0..7] +3.3VL DGE7 C142 DGE3 DGE4 0.1uF DGE5 DBE0 DBE6 DGE[0..7] DBE[0..7] 10K U12 NC +3.3VL +3.3VL DBE7 C144 DBE1 DBE2 0.1uF DBE3 C146 DBE4 DBE5 0.1uF +3.
D4 DSUB2_5V +5V BAV70 SOT23 2 D5 DSUB1_5V 1 +5V BAV70 3 SOT23 C159 2 1 R94 R95 2.2K 2.2K 0.1uF 3 C160 R98 R96 R97 2.2K 2.2K 0.1uF R100 2 2 SCL_IN2 2 SDA_IN2 GND 100 R99 100 GND 100 SCL_IN1 2 U14 R101 100 SDA_IN1 1 2 3 4 U15 1 2 3 4 A0 A1 A2 GND 8 7 6 5 VCC WP SCL SDA R106 0 R105 0 8 7 6 5 VCC WP SCL SDA R102 NC DDCSCL2 DDCSDA2 PCB2421 DDCSCL1 DDCSDA1 PCB2421 +3.3VD R104 A0 A1 A2 GND R103 NC 3 3 GND C177 GND 510 0.
11.
Main Board Confidential - Do Not Copy ViewSonic Corporation 77 VP191b/s
Control Board Confidential - Do Not Copy ViewSonic Corporation 78 VP191b/s
*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 VP191b/s 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.
