ViewSonic VG500-2 VLCDS24349-2W Service Manual
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ViewSonic VG500-2 VLCDS24349-2W Service Manual

ViewSonic VG500-2 VLCDS24349-2W Service Manual

15" color tft lcd display
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Service Manual

ViewSonic VG500-2
Model No. VLCDS24349-2W
15 Color TFT LCD Display
"
VG500-2_SM_679-Rev. 1a - Oct. 2003
®
ViewSonic
381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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Summary of Contents for ViewSonic VG500-2 VLCDS24349-2W

  • Page 1: Service Manual

    Service Manual ViewSonic VG500-2 Model No. VLCDS24349-2W 15 Color TFT LCD Display ” VG500-2_SM_679-Rev. 1a - Oct. 2003 ® 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. Adjusting Procedure 6. Trouble Shooting Flow Chart 7. Recommended Spare Parts List 8. Exploded Diagram And Spare Parts List 9. Block Diagram 10. Schematic Diagrams 11. PCB Layout Diagrams ViewSonic Corporation Confidential - Do Not Copy VG500-2...

  • Page 4: Precautions And Safety Notices

    3. Keep wires away from high voltage, high temperature components and sharp edges. 4. Keep wires in their original position so as to reduce interference. 5. Usage of this product please refer to also user's manual. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 5: Specification

    Storage: -20˚C~+60˚C (240h) Compliance UL, CSA, FCC, CE, CB, BSMI, Energy Star, TUV, Semko, Nemko, Femko, Demko, DHHS, MPRII, TCO99, GOST-R, C-Tick, VCCI, CCC Power Input Voltage: 100~240 Vac Consumption: 30Watts (Max.) ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 6 GREEN 0.7vp-p (VIDEO) BLUE 0.7vp-p (VIDEO) GROUND GROUND GROUND GROUND GROUND VCC_+5V PC +5V GROUND N.C. DDC_SDA DDC1/2B DDC_SCL DDC1/2B VGA_VSYNC VSYNC TTL positive or negative VGA_HSYNC HSYNC TTL positive or negative ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 7 2.4 Main DC+12V Input (J800 on I/F Board) Pin No. Symbol Function Ground DC+12V Main DC+12V Input Ground 2.5 Audio Input Jack (J701 on I/F Board) Pin No. Symbol Function Ground L_CH_Audio Input R_CH_Audio Input L_CH_Audio Return R_CH_Audio Return ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 8 Audio Must control (High means SPK off, Low means On) Ground DC+5V DC+5V STDBY Audio Stand-by control (Hi means stand-by, Low means Normal) VOLUME Speaker volume control (0V means Sound off, 1.2V means MAX.) ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 9 DC+9V for panel D/A reference voltage to make gray scale smooth VDDA DC+9V for panel D/A reference voltage to make gray scale smooth VDDA DC+9V for panel D/A reference voltage to make gray scale smooth ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 10 Panel flicker adjustment, Adjustable voltage from DC3.3V ~4V VCOM Panel flicker adjustment, Adjustable voltage from DC3.3V ~4V Ground Ground Blue data signal of even pixel Blue data signal of even pixel Blue data signal of even pixel ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 11 DC+5V DC+5V Ground MUTE+ Audio mute control (Voltage High speaker off, Low speaker on) Brightness adjustment (Low is max., High is Min.) CCFL_EN Backlight lamps enable (ON/high, OFF/low) Ground DC+12V DC+12V Ground ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 12 Brightness adjustment (Low is Max., High is Min.) DC+5V DC+5V CCFL_EN Backlight lamps enable (ON/high, OFF/low) CN701 : Connect to control board, control the audio Pin No. Symbol Function L_CH_SP_-Signal L_CH_SP_+Signal GND_S1 Ground R_CH_SP_-Signal R_CH_SP_+Signal ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 13: Front Panel Function Control Description

    Also toggles between two controls on some screens. Also a shortcut to Auto Image Adjust. Decreases or increases volume. Power light Green = ON Temporarily silences Orange = Power audio output. Saving Power On/Off ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 14 • 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.) ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 15: Main Menu Controls

    Custom User Color — Individual adjustments for red, green, and blue. To select color (R, G or B) press button [2]. ▲ ▼ To adjust selected color, press When you are finished making all color adjustments, press button [1] twice. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 16 Resolution Notice LCD display. Enable allows the Resolution Notice to appear on-screen. Disable will not allow the Resolution Notice to appear on- screen. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 17 Memory Recall returns adjustments to the original factory settings if the display is operating in a factory Preset Timing Mode listed in this user guide. Exception: This control does not effect changes made with the Custom User Color control. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 18: User Control Functions

    6. Press “mute” button can directly mute on or off the audio volume. 7. Press "1" and "2" button simultaneously will toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode. 8. Press "1", "down", and "up" button simultaneously will do White Balance. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 19: Circuit Description

    Q702. When mute is activated, the Q703 will be forced to saturation to block sound output. When standby is activated, the sound outputs of U701 will drive speakers via CN701 connecter. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 20: Adjusting Procedure

    Pattern ) Hot Key 1) All Mode Reset ” and "power" buttons simultaneously and "Power on" with signal hold Press “ on for 3 seconds. The OSD screen will show "Software Version". ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 21 " button , the OSD will show “Burn In Mode Setting ” Then set " or " buttons , you can find “ set Burn In Mode ” Information about this monitor ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 22 Please set the screen on 1024x768 @ 60 Hz resolution 5 white block pattern 5) Power Lock Press " and " “ " buttons simultaneously for 10 seconds , and the Power will be locked. Repeat the action , and the power will be unlocked. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 23 6) OSD Lock Press " and " " buttons simultaneously for 10 seconds, and the OSD will be locked. Repeat the action and the OSD will be unlocked. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 24 (1) After SET ON ,Press [F5]then verify DDC1 data .Press[F6] to verify DDC2 data. (2) During verification for either DDC1 or DDC2 a green color sentence will appear "Receive DDC Data OK", and will disappear after 10 seconds. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 25 ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 26: Trouble Shooting Flow Chart

    Still no sync are not Hangs Picture absent The Voltage across Replace Q702 Q702 is 5V Check U004 ReplaceU001 Replace U004 Still no Picture Check U009 ReplaceU005 Replace U009 MASCOT V2 Replace U001 ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 27 Next The Voltage of I001 Replace I001 #2 is 3.3V Replace U001 Still No LED Replace Y001, C003, Check Y001 crystal C004 clock Replace U005 (MASCOT V2 ) ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 28 LCD panel DE) normal CON5, CON6 CON5,CON6 connectors Tighten two flex Are the input Replace V901 (LCD waveforms of cables at panel) M V2 normal CON5,CON6 PEPLACE MV2 ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 29 Check if CN701 is connected to U701 properly Check U801 output U701 #1 voltage is Replace U801 #7 is normal Check U701 output #2,#4,#10,#12 are normal Replace U701 ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 30: Recommended Spare Parts List

    7. Recommended Spare Parts List Q'ty Item ViewSonic P/N Ref. P/N Description Location 5097616700 MAIN Board Ass’ y PWB-0535 B-MB-0201-0787 PWB-0535 5097617100 Inverter Board Ass'y PWB-0538 B-SB-0221-0560 PWB-0538 5097616800 Key Pad Board Ass'y PWB-0536 B-KB-0207-0041 PWB-0536 5097616900 Audio&Power Board Ass'y PWB-0537...
  • Page 31 Q'ty Item ViewSonic P/N Ref. P/N Description Location E-IC-0401-2893 6647051834 U004 S524A40X21 E-IC-0401-2894 6647053550 MASCOT V2 MRT U005 E-Q-0402-1622 6644009053 SI4435DY-TI-A 30V 8A U007 E-IC-0401-2407 6646021651 RT34063ACS U008 E-R-0405-6578 5162161020 0.3W B 1.0K OHM M VR01 E-X-0415-0135 6699114210 12M CRYSTAL...
  • Page 32 VG500-2 BOM LIST (PCB-MAIN) Item ViewSonic P/N Ref. P/N Description Location 5782510261 CONNECTOR T-S12BZR CON1 5782511011 CONNECTOR T-B12B-ZR CON3 5782711011 CONNECTOR 1216-064-15S-AAC CON4 5782971502 CONNECTOR IL-FHR-50S-HF CON5,CON6 5240615191 CAPACITOR MONOLITHIC SMD REEL 150P 0603 5230656291 CAPACITOR MONOLITHIC SMD REEL 5600P 0603...
  • Page 33 Item ViewSonic P/N Ref. P/N Description Location 5134322109 RESISTOR.THICK FILM CHIP 0603 1/16W 220R R43,R42 5134315109 RESISTOR.THICK FILM CHIP 0603 1/16W 150R R50,R53,R54,R71 5134322209 RESISTOR.THICK FILM CHIP 0603 1/16W 2.2K R56,R74,R82 5134315009 RESISTOR.THICK FILM CHIP 0603 1/16W 15R 5134310509 RESISTOR.THICK FILM CHIP 0603 1/16W 1MR 5136006800 RESISTOR THICK FILM CHIP430R 0.22R 1/4W 0805...
  • Page 34 VG500-2 BOM LIST CABINET & KEY-CONTROL PCB Item ViewSonic P/N Ref. P/N Description Location Q'ty C-FP-0301-0401 5733715802 3C06 M-CV-0830-2473 5733715902 F/C2 (Speaker cover) 3C07A Back Cover C-BC-0302-0535 5733715702 3C01 M-MS-0808-8273 5731274500 SHIELD Plate 3C14 M-MS-0808-8278 5731708100 Hinge (R) 2B01 M-MS-0808-8279...
  • Page 35 VG500-2 BOM LIST - POWER & AUDIO ASSEMBLY Item ViewSonic P/N Ref. P/N Description Location 5782510001 CONNECTOR S5B-PH-K CN701,CN830 C703,C704,C714,C812,C830, 5230005491 CAPACITOR MONOLITHIC SMD REEL 0.1U 25v 0603 C831,C833 5214020202 CAPACITOR ELECTROLYTIC MVY 470uF/16V C801,C705 5218007891 CAPACITOR ELECTROLYTIC MVY 10uF/16V...
  • Page 36 VG500-2 BOM LIST PCB INVERTER ASSEMBLY Item ViewSonic P/N Ref. P/N Description Location 5130004291 C003,C014 CAPACITOR MONOLITHIC SMD REEL 5230014191 C004,C011 CAPACITOR MONOLITHIC SMD REEL 5240003591 C005,C017 CAPACITOR MONOLITHIC SMD REEL 18P 3KV 1808 5230017391 22000P 50V 0603 C006,C018 CAPACITOR MONOLITHIC SMD REEL...

  • Page 37: Exploded Diagram And Spare Parts List

    8. Exploded Diagram And Spare Parts List ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 38: Exploded Parts List

    EXPLODED PARTS LIST VG500-2 Exploded Parts List Item ViewSonic P/N Ref. P/N Designation Remark(Ckt/Name) Qty B-MB-0201-0787 5097616700 Main PCB Assembly PWB-0535 B-MB-0221-0560 5097617100 Inverter PCB Asseembly PWB-0538 B-AC-0215-0044 5097616900 Power&AudioPCB Assembly PWB-0537 B-KB-0207-0041 5097616800 Key Board Aeeembly PWB-0536 M-MS-0808-8287 5784011204...
  • Page 39 Item ViewSonic P/N Ref. P/N Designation Remark(Ckt/Name) Qty S-2 M-SCW-0824-6724 7190571011 SCREW HEX HEAD M3x6 S-NI Panel S-2 M-SCW-0824-6724 7190571011 SCREW HEX HEAD M3x6 S-NI Panel S-2 M-SCW-0824-6724 7190571011 SCREW HEX HEAD M3x6 S-NI IF board S-2 M-SCW-0824-6724 7190571011 SCREW HEX HEAD M3x6 S-NI...

  • Page 40: Disassembly Of Rear Cover

    Disassembly Of Rear Cover 1. Unscrew nine screws of Base Plate and remove. 2. Remove key control cover from LCD Monitor Chassis ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 41 3. Unscrew two screws and remove front cover. 4. Unscrew seven screws to separate LCD panel assembly from rear cover, and disconnect two connectors to remove key control Board. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 42: Audio Board

    Disassembly of Inverter Board, Main Board and Power &Audio Board 1. Unscrew eight screws that secure shielding plate and remove. 2. Unscrew four screws that secure Power & Audio Board and disconnect three connectors to remove. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 43 3. Unscrew three screws that secure Inverter Board and disconnect three connectors to remove. 4. Unscrew four screws that secure Main Board and disconnect four connectors to remove. ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 44: Block Diagram

    IIC BUS VCOM AT24WC1 CCFL-EN VDDA VCOM 3.45V Brightness control L015 U001 RT916A32 Inverte IC MCU M8064 R084 U009 12V DC U004 VR001 SWITCH DDC IC SW Select Control 74HC4D52D 1K 0.1W AT24C02N ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 45: Schematic Diagrams

    CCFL_EN +3.3V CCFL_EN 4 BRIGHTNESS BRIGHTNESS 4 MUTE+ RC1117M-3.3 510mA VOUT STDBY VOLUME VOLUME 0.1uF TO-263 T-B12B-ZR 470uF/16V 220uF/16V Title 2.0 MCU Size Document Number E91001 Date: Friday, July 25, 2003 Sheet ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 46 4.7K 4.7K 0.1uF C156 DDC_SCL 100R DDC_SDA 100R 74LVC14 +3.3V 100pF 100pF MMSZ5232B MMSZ5232B SCREW3.5 SCREW3.5 SCREW3.5 SCREW3.5 Title 3.0 Analog Input Size Document Number E91001 Date: Friday, July 25, 2003 Sheet ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 47 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 510R/NC 0/NC LF/VSS VSS/SSON PLL-VDD P2781A/P2027A/NC 0.1uF/NC 560pF/NC 0.1uF 10uF 12MHZ Title 4.0 MV2 22pF 22pF Size Document Number Date: Friday, July 25, 2003 Sheet ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 48 VEEG= -6V C120 C121 C122 C123 C124 C125 C126 C127 56pF 56pF 56pF 56pF 56pF 56pF 56pF 56pF Title 5.0 Panel Interface Size Document Number E91001 Date: Friday, July 25, 2003 Sheet ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 49 0.1uF 2.2K 620R 1% C152 C153 C154 1.25K 10uF/16V 220uF/16V 0.1uF 18R 1% VDDA_EN DTC114TKA/KSR1110 1K 0.1W Title 6.0 Panel Volt Size Document Number Custom E91001 Date: Friday, July 25, 2003 Sheet ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 50 S107 S106 S105 S103 S102 S108 S104 S101 CSL-F300YG2CT SKHHPL2420-TT SKHHPL2420-TT SKHHPL2420-TT SKHHPL2420-TT SKHHPL2420-TT SKHHPL2420-TT SKHHPL2420-TT SKHHPL2420-TT Title VIEWSONIC KEY PAD BOARD Size Document Number E91001 Date: Monday, April 07, 2003 Sheet ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 51 DTC114TKA/KSR1110 MUTE+ Lo Lightest C831 R833 2.2K 0.1uF STDBY STDBY Volume Q831 C834 VOLUME C812 DTC114TKA/KSR1110 33uF/10V T-B12B_ZR 1uF/16V Title 2.0 POWER Size Document Number E91001 Date: Monday, April 07, 2003 Sheet ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 52 1K/NC R705 1K R718 100K Q702 R704 C707 C714 VOLUME Q703 MUTE+ 1.5K 100uF/16V 10uF/16V/NC DTC114TKA/KSR1110 DTC114TKA/KSR1110 GND_S1 GND_S1 GND_S1 GND_S1 GND_S1 Title 7.0 SOUND AMP Size Document Number Date: 10/16/2002 Sheet ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 53 ViewSonic Corporation VG500-2 Confidential – Do Not Copy...

  • Page 54: Pcb Layout Diagrams

    11. PCB Layout Diagrams ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 55 ViewSonic Corporation VG500-2 Confidential – Do Not Copy...
  • Page 56 C. Do you have any other opinion or suggestion about this Service Manual? Reader's basic data: Name Title Company 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)

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