Service Manual ViewSonic VE1920wmb-2 Model No. VS10866 19” Color TFT LCD Display (VA1920wmb-2_SM Rev. 1a Aug.
Copyright Copyright © 2006 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 11 5. Adjustment Procedure 12 6. Troubleshooting Flow Chart 32 7. Recommended Spare Parts List 40 8. Exploded Diagram and Exploded Parts List 42 9. Block Diagram 44 10. Schematic Diagrams 45 11.
1. Precautions and Safety Notices 1.1. Appropriate Operation (1) Turn off the product before cleaning. (2) Use only a dry soft cloth when cleaning the LCD panel surface. (3) Use a soft cloth soaked with mild detergent to clean the display housing. (4) Use only a high quality, safety approved AC/DC power cord. (5) Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
Correct methods : Only touch the metal-frame of the panel or the front cover of the monitor. Do not touch the surface of the polarizer . Incorrect Methods : Surface of the panel is pressed by fingers & this may cause “ MURA “ Take out the monitor with cushion Take out the monitor by grasping the LCD panel. That may cause “ MURA“. Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects .
2. Specification Introduction TFTLCD PANEL Input Signal Sync Compatibility Compatibility Power Voltage Power Consumption Audio Ergonomics OSD Control Dimension Weight Operating Condition Storage Condition Regulation FEATURES Size Luminance (Typ, cd/㎡) Contrast Ratio (Typ) Colors ( 6 bit + 2 bit FRC) Response Time (Typ) Viewing Angle (H/V) Recommend resolution Analog (75ohms, 0.7/1.
VIDEO INTERFACE Analog Input Connector DB-15 (Analog), refer the appendix A Digital Input Connector DVI-D (Digital) ,refer the appendix B Default Input Connector Defaults to the first detected input Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes Video Cable Connector DB-15 Pin out Compliant DDC 2B Video Signals 1. Video RGB (Analog) 2.
detectable by the user. Audible shall defined to be in compliance with ISO 7779 (DIN EN27779:1991) Noise measurements of machines acoustics. Power Switch noise shall not be considered Separate 3-prong NEMA 5-15P type plug. Length = 1.8m. Connects to display. Color = Black Schuko CEE7-7 type plug. Length = 1.8m, Connects to display. Color = Black Separate 3-prong type plug. Length = 1.8m. Connects to display. Color = Black Separate 2-prong NEMA 1-15P type plug. Length = 1.8m. Connects to display.
19 1024 x 768 @ 75Hz, 60.0kHz Yes Yes 20 1024 x 768 @ 85Hz, 68.67kHz Yes Yes 21 1152 x 864@ 75Hz, 67.5kHz Yes Yes 22 1280 x 1024 @ 60Hz, 63.4kHz Yes Yes 23 1280 x 1024 @ 75Hz, 79.97kHz Yes No 24 1280x 768 @ 60Hz, 47.78kHz Yes Yes 25 1280 x 960 @60Hz, 60kHz Yes Yes 26 1440 x 900 @ 60Hz, 55.96kHz Yes Yes *The image vertical size might not be full screen.
3. Front Panel Function Control Description Front Panel Hardware Controls Power Switch (Front Head) Power Control, soft Power Switch. Power LED (Front Head) Green – ON Orange – Active Off Dark = Soft Power Switch OFF [ ] Power [ 1 ] BUTTON 1 [ 2 ] Button 2 [▲] UP ARROW BUTTON [▼] DOWN ARROW BUTTON [; X] Audio Mute on/off Front Panel Controls (Head) [;X] [ 1 ] [▼] [▲] [ 2 ] [ ] Note: Power Button, Button 1 and Button 2 and Mute Button must be one-shot logic operation. (i.e.
Main Menu Controls Auto Image Adjust*1 Contrast/Brightness*2*4 Input Select Analog, Digital Audio Adjust Volume*4, Mute*4 Color Adjust sRGB, 9300K, 6500K(default), 5400, 5000, User Color [R, G, B] Information H Frequency, V Frequency, Resolution, Pixel Clock, Serial Number, Model Number, “www.ViewSonic.com” Manual Image Adjust H. Size*1, H./V.
for 10 seconds. Note 1: Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate “Power Button Locked” Note 2: Power should only be lockable in the “On State” Memory Recall Actions Memory Recall action on the analog and digital mode as below 1. Set the factory defaults as shown in Section 4-8 2. Clean all the mode setting buffer 3.
OSD Table Layer 1 Layer 2 Layer 3 Auto Image Adjust Contrast/Brightness Contrast (+ / -) Brightness (+ / -) Input Select Analog Digital Audio adjust Volume (+, -) Mute On/Off sRGB 9300K 6500K Color Adjust 5400K 5000K Red (+ / -) User Color Green (+ / -) Blue (+ / -) Information Horizontal Size +/H Position (+ / -) H/V Position Manual Image Adjust V Position (+ / -) Fine Tune +/- Sharpness +/English French German Spanish Language Select Italian Finnish Japanese Setup Menu Simplified Ch
4. Circuit Description The TSUM57AK is total solution graphics processing IC for LCD monitors with panel resolutions up to SXGA. It is configured with a high-speed integrated triple-ADC/PLL, an integrated DVI receiver, a high quality display processing engine, and an integrated output display interface that can support RSDS panel interface format.
5. Adjustment Procedure A. Function Test and Alignment Procedure 1. All Modes Reset You should do “All Model Reset” (Refer to Chap 3. Hot Keys for Function Controls) first. This action will allow you to erase all end-user’s settings and restore the factory defaults. 2. Auto Image Adjust The Auto Adjust is aimed to offer a best screen quality by built-in ASIC. For optimum screen quality, the user has to adjust each function manually. A.Turn the computer and LCD monitor on. B.
8. 50 Gray Test Signal: 1280*1024@60Hz Test Pattern: Full Screen 50% White (Gray) Inspection Item: Bright Dot, Particle, Line Defect & Mura 9. White Box Test Signal: 1280*1024@60Hz Test Pattern: Window standard pattern Inspection Item: Particle, Line Defect, Power, Image Remain & Mura 10. Black Box Test Signal: 1280*1024@60Hz Test Pattern: Window standard pattern Inspection Item: Bright Dot, Line Defect & Power 11.
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Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 ViewSonic Corporation 15 Confidential - Do Not Copy VE1920wmb-2
BIOS update procedure Mstar ISP Tool User Manual Setp1: Take the cable of Print Port to connect Print Port of PC and Print Port of fixture(and EDID burn in the same fixture) to connect VGA Cable between D-sub of fixture and D-sub of AD Board of monitor，the monitor must be turned on the power。 Step 2 : Open ISP Tool ViewSonic Corporation 16 Confidential - Do Not Copy VE1920wmb-2
Step 3 : Press ”connect” into ISP mode，display the model of Flash，The dialog of figure is displayed “Device Type is Pm25LV512” then press ”確定”。 Step 4: to down load the program of BIOS (*.
Step 5 : Press ”Auto” into below figure that display the value of BIOS Checksum below figure is displayed “0x1626” then press ”Run” to execute the BIOS procedure。 The BIOS procedure is displayed the message ”Verify OK” that the BIOS procedure is successful。 Step 6 : Press ”Dis Con” then leave the mode of ISP。 ViewSonic Corporation 18 Confidential - Do Not Copy VE1920wmb-2
Step 7： When select ”ReConnect” and press “Run” then repeat to connect the mode of ISP into next the action of BIOS procedure ViewSonic Corporation 19 Confidential - Do Not Copy VE1920wmb-2
Monitor Assembly and Disassembly 1 Separate Stand Assy 1.1 Remove Seat Assy Step 1 : Press Stand Assy’s bottom part in Seat Hinge Step 2: Remove Seat Assy 1.
2 Separate Rear Cover (Rear Case Assy) Separate Bezel hooks to take Bezel and Rear Cover apart. Step 1 : Remove Cover Hinge Step 2 : Loose and Remove 2 screws Step 3 : Separate Bezel hooks to take Bezel and Rear Cover apart.
3 Remove Power Board and AD Board 3.1 Remove Metal Cover Step 1 : Remove FFC from OSD Board. Step 2 : Loose and remove 4 screws. Step 3 : Lift up LCD module and remove bezel. Step 4 : Remove 2 pieces of Backlight wires. Step 5 : Remove 2 pieces of Backlight wires.
Step 6 : Loose and remove 4 screws. Step 7 : Loose and remove 2 screws. Step 8 : Loose and remove 4 screws. Step 9 : Remove the PCBA Cover 3.2 Remove Power Board and AD Board Step 1 : Loose and remove 4 screws.
Step 2 : Remove Lips Board Step 3 : Remove 2 pieces of FFCs. Step 4 : Remove the FFC. Step 5 : Loose and remove 4 screws. Step 6 : Remove AD PCBA. Step7 : Completed.
4 Change New AD Board and Power Board Step 1 : Place new AD Board. And fasten 4 fixed screws. Step 2 : Fasten 4 fixed screws. Step 3 : Insert FFC. Step 4 : Insert 2 pieces of FFCs . Step 5 : Insert new Lips Board.
Step 6 : Fasten 4 fixed screws. Step 7 :Completed. 5 Remove OSD Board Step 1 : Separate both Audio Cable. Step 2 : Take OSD Board apart. Step 3: Completed.
6 Change New OSD Board Step 1 : Place New OSD Board. Step 2 : Insert Audio cable to connectors of New OSD Board. Step 3: Completed. 7 Add Cover to AD PCB Heatsink Step 1 : Join the PCB Cover. Step 2 : Fasten 4 fixed screws.
Step 4 : Fasten 4 fixed screws. Step 5 : Insert 2 pieces of Backlight wires. Step 6 : Insert 2 pieces of Backlight. wires. Step 7 : Join LCD module and remove bezel. Step 8 : Fasten 4 fixed screws.
Step 9 : Insert FFC. Step 10 : Completed.
9 Stand Assy Assembly Step 1: Place Seat Assy Step 2 : Fasten 4 screws Step 3: Join Seat Assy ViewSonic Corporation 30 Confidential - Do Not Copy VE1920wmb-2
Packing For Shipping And Disassembly Procedure Packing For Shipping 1. Packing Procedure 1.1 Paste protection film to protect the monitor. (Figure 1) 1.2 Put the monitor in the PE bag and seal the bag with tape. (Figure 2) Figure 2 Figure 1 1.3 Put the cushions on the monitor. (Figure 3) 1.4 Place the monitor into the carton and then put all the accessories into the carton. As last, close the carton and seal it with tape.
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Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair A Display Noise Power on Check PCBA Display AD/B Change Power/B Change Abnormal Inverter/B Change Flicker CNT/B Change Beat Display Flicker Check Panel Panel Change Beat Display Shut Down Display Wave AD/B Change Check PCBA Power/B Change CNT/B Change No Backlight Check Panel Panel Change Check Adapter Adapter Change Next Step NG B ViewSonic Corporation TEST Completed 33 Confide
Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair B Display White Out Check PCBA AD/B Change Power/B Change Booting Delay Check PCBA Brightness OSD/B Change Even Abnormal Check PCBA Power/B Change Inverter/B Change Beat Display No Backlight Inverter/B Change Check Panel Check Adapter Panel Change Adapter Change No signal AD/B Change R.G.
Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair C Horizontal Line Defect Vertical Weak Line Check PCBA AD/B Change Check Panel Panel Change Horizontal Weak Line Vertical Band Defect Horizontal Band Defect Power Saving Display Abnormal Check PCBA AD/B Change AD/B Change Peculiar Smell Check PCBA Power/B Change Inverter/B Change Next Step NG TEST Complete ViewSonic Corporation 35 Confidential - Do Not Copy VE1920wmb-2
Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair AD/B Change Power/B Change Power ON/OFF No Power Abnormal Turn Off Check PCBA Check PCBA CNT/B Change Inverter/B OSD/B Change Abnormal Check Wire OSD Cable Check Wire AC Power Change DC Power CNT Cable Change Check Adapter Adapter Change AD/B Change LED Display Abnormal LED Off Check PCBA Power/B Change Inverter/B LED Dark OSD/B Change LED Abnormal LED Loss OSD Cable Check Wire DC Power
Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair Abnormal BIOS &OSD OSD Key AD/B Change Unavailable CNT/B Change OSD Can’t Input Power/B Change Check PCB Inverter/B OSD Can’t Read OSD/B Change OSD No D-sub cable Display OSD cable Check Wire OSD Jiggle OSD Display Abnormal Abnormal Loudspeaker VGA cable DVI cable Check BIOS BIOS Update AD/B Change Voice Loss CNT/B Change Abnormal Loud Power/B Change Check PCBA Inverter/B Change L
Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair Other Abnormal Display Shut Display Check PCBA Down AD/B Change Power/B Change CNT/B Change Check Panel Display Flicker Check PCBA ((tapping ) Check PCB Display Abnormal TV Function Display Abnormal AD/B Change CNT/B Change Check Panel DVI Signal Panel Change Check EDID Code Check PCBA Check Wire Check Controller Panel Change AD/B Change EDID Update TV /B Change AV Cable Change Remote
Trouble Shooting Analysis Check the information in this section to see if the problems can be solved before requesting repair. Note：The consumers are only allowed to solve the problems described as below. Any unauthorized product modification, or failure to follow instructions supplied with the product will end the warranty immediately. z No image z No Signal Input z z z Reset the LCD monitor Take off extra accessories (such as signal extension cord).
7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VE1920wmb-2) ViewSonic Model Number: VS10866 Serial No. Prefix: QCB 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 Accessories: PC Board Assembly: Cabinets: Cables: Documentation: Hardware: Miscellaneous: Packing Material: Plastics: Description Power Cord Audio Board (Rev.02) Audio Control Board (Rev.
BOM LIST (VE1920wmb-2) ViewSonic Model Number: VS10866 Rev: 1a Serial No.
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PACKING PART LIST ( VE1920wmb-2 ) ViewSonic Model Number: VS10866 Rev: 1a Item 1 2 3 4 5 6 7 8 9 10 11 12 ViewSonic P/N N/A P-00000595 P-00006049 P-00006050 N/A N/A CB-00004287 CB-00000544 N/A N/A N/A N/A Ref.
9. Block Diagram Speaker OSD Key Pad / Audio Out 3.
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VCC33 VDPP L10 VDDC 12 97 117 68 WP WP 0603/100n/25V/7 C80 1206/10u/16V/X/PbF TSUM57AK U2 C90 8 7 3 4 GND VDD HOLD# WP# VSS SDO CE# SCK SDI 2 1 6 5 70 71 72 73 R116 0603/10K/5% 32 C94 0603/22p/50V/N Y1 14.
0603/1K/5%/RoHS V33C R12 V33C V33C R9 V5A 0603/10K/5%/RoHS 3 1 2 1 0603/4.7K/5%/RoHS R14 TP TP LP2 FBMJ2125HS420/PbF LP3 FBMJ2125HS420/PbF LP4 FBMJ2125HS420/PbF INV_ON/OFF1 INV_ADJ 0603/4.7K/5%/RoHS 3 Q1 2N7002/RoHS 0603/1u/10V/Y/open V5A1 VIN_12V1 VIN_12V R13 C7 1 C8 0603/0.1u/25V/open Q2 2N7002/RoHS R10 1 2 GND INV_ON/OFF 1 TP INV_ADJ INV_ON/OFF 1 GND [GND_INV] INV_ADJ1 0603/4.
V18C D7 BAV70W/open V18C Q8 3 V33C1 B GND 4 E C 2 1 1 C160 0805/4.7u/16V/Y H2907AS R203 0603/2K/1% 2 TP C42 1206/22u/16V/Y/RoHS Vref 1 B240A-F LM1117MPX-3.
R35 DDCA_DAT 0603/0R/5%/OPEN 11 1 6 2 7 3 8 4 9 5 10 12 13 14 15 R78 R30 R29 0603/75R/1% 0603/75R/1% 0603/75R/1% R21 0603/56R/1% C9 0603/47n/16V/7/RoHS R34 0603/56R/1% C10 0603/47n/16V/7/RoHS R23 0603/56R/1% C11 0603/47n/16V/7/RoHS R24 0603/470R/1% C15 0603/1n/16V/7 RIN GIN BIN SOG CN7 89263-6762 R25 D1 1 R144 0603/0R/5%/OPEN D2 D24 1 BAV99W/RoHS 1 D25 BAV99W/RoHS C157 0603/100n/25V/X/RoHS DDCA_CLK L20 2 HSI GND 2 C159 0603/100n/25V/X/RoHS 0603/0R/5%/RoHS R57 R55 C124
V5A_ESD CON1 DDCD_DAT R39 R37 0603/0R/5%/RoHS R38 0603/0R/5%/RoHS 2 L6 1 DVI_5V 3 0603/100n/25V/7 0603/100n/25V/7 0603/100n/25V/7 0603/100n/25V/7 D17 UDZSF-5.
5 6 7 8 5 6 7 8 4 3 2 1 RP46 0603*4/10K/5%/RoHS 4 3 2 1 V33C RP47 0603*4/10K/5%/RoHS Bead Array LP8,LP9,LP11=>modified RoHs MENU LEFT RIGHT TURBO AUTO LED_O LP6 1 2 3 4 LP7 1 2 3 4 LED_G POWER CN3 8 BK32164M121 7 6 5 8 BK32164M121 7 6 5 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 L1 AUDIOR- 1 2 MPZ1608S221/RoHS AUDIOR+ CP7 CP8 0603*4/100n/25V/RoHS 0603*4/100n/25V/RoHS V33C R62 0603/10K/5%/RoHS 5 6 7 8 R36 0603/1K/5%/RoHS/OPEN R7 5 6 7 8 V33C 4 3 2 1 4 3 2 1 L2 V33C AUDIOL- 1 2 MPZ1608
VCC STV CPV FSTH FB2P FB2N FB1P FB1N FB0P FB0N OE STB BB2P BB2N BB1P BB1N BB0P BB0N FSTH BG2P BG2N BG1P BG1N BG0P BG0N FG2P FG2N FG1P FG1N FG0P FG0N POL BCKP BCKN FCKP FCKN PANEL_ON/OFF STB POL BR2P BR2N BR1P BR1N BR0P BR0N STB POL FR2P FR2N FR1P FR1N FR0P FR0N DCDC_ON/OFF V33P OE CPV STV GND VCM_PWM BSTH BSTH OE CPV STV V5A GND V5A GVOFF VCM_PWM DCDC_ON/OFF PANEL_ON/OFF GVOFF VCM_PWM DCDC_ON/OFF PANEL_ON/OFF VCC V33P GVOFF V12A GND GND V12A FSTH BSTH GND S Board X Boar
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* Reader’s 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 this Service Manual? Unit Excellent Good Fair Bad 1. Precautions and Safety Notices 2. Specification 3. Front Panel Function Control Description 4. Circuit Description 5. Adjustment Procedure 6.
