ViewSonic VLCDS27955-1W Service Manual
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ViewSonic VLCDS27955-1W Service Manual

ViewSonic VLCDS27955-1W Service Manual

15” color tft lcd display
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Service Manual

ViewSonic VG510b/s-1
Model No. VLCDS27955-1W/-2W
15" Color TFT LCD Display
(VG510b/s_SM_722 Rev. 1a Apr. 2004)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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Summary of Contents for ViewSonic VLCDS27955-1W

  • Page 1: Service Manual

    Service Manual ViewSonic VG510b/s-1 Model No. VLCDS27955-1W/-2W 15” Color TFT LCD Display (VG510b/s_SM_722 Rev. 1a Apr. 2004) 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 Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 4: Precautions And Safety Notices

    This product should never be placed near or over a radiator or heat register. This product should not be placed in a built-in installation unless proper ventilation is provided. Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 5: Specification

    2.7 kgs. (LCD Module only) 3.4kgs. (unit) Accessory VGA cable, AC/DC adapter, power cord. Temperature Operation : 0 ~ 50°C Storage : -20 ~ 60°C Color temp (white) White x 0.313±0.03 , white y 0.329±0.03 Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 6 Mini D-sub Connector. Signal Connector Pin NO. Red Video Signal Green Video Signal Blue Video Signal N.C. Ground Ground Ground Ground Ground N.C. DDC data Horizontal sync signal Vertical sync signal DDC clock Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 7 TMDS positive differential input, channel 0 Logic Ground Reserved 20 Reserved. No connection Reserved 21 Reserved. No connection Logic Ground RXC+ TMDS positive differential input, reference clock RXC- TMDS negative differential input, reference clock Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 8: Front Panel Function Control Description

    3. Front Panel Function Control Description Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 9 D-Sub not connected),then press [1] key at the same time and plug the AC cord. 14) AUTO COLOR: press three buttons [1] & [up] & [down], this function only use for 1024x768 60hz patten 42/of Chroma 2135 signal generator. NOTE: chroma Patten 42 Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 10: Circuit Description

    The MTV312M64 micro-controller is an 8051 CPU core embedded device specially tailored to LCD monitor applications. It include an 8051 CPU core, 1024-byte SRAM, 14 built-in PWM DACs, VESA DDC interface, 4 channel 6bit A/D converter, a 64 K-byte internal program Flash-ROM . Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 11: Adjusting Procedure

    First, power off the monitor, un-plug the AC cord and be sure the signal cable is connected(D-sub connected) , then press “2” key at the same time and plug the AC cord to factory. Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 12: Trouble Shooting Flow Chart

    Check MCU (1)Check Scaler H/V sync correct? crystal (2)Measure at Scaler side Check Scaler Check MCU or Reprogram MCU (1)Scaler no power (2)Scaler changed no OSC Check input source Check 7414 Check Inverter Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 13 (2)H/V sync input (1)LVDS no enable or enable polarity error tolerance too big (2)LVDS CKT not assembled ok (3)Scaler O/P CKT not assembled ok Picture distortion distorted Incorrect panel type or cable Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 14 Check 4 corner are shorted pin short or bend or not Be carefully when using Change socket Check if socket probe to measure pin bend If input over Not allowed MCU 3.3+0.3V MCU bad Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 15 Use 32 or 64 gray scale (1) VGA cable quality Noise at certain scale for (2) Power(3.3V/2.5V) more than one color have big noise LVDS O/P short or open Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 16 5V ok ? 3.3V/2.5V ok ? Measure +12V to +12V->5V +5V short to regulator CKT no GND or 3.3V MCU 3.3V bad work 3.3V/2.5V short to GND PC 5V/DC 3.3V CKT not correct Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 17: Recommended Spare Parts List

    LANGF2133D8---- D-SUB METAL D-SUB METAL M-MS-0808-9117 PGUM-1124D8---- VESA GUM VESA GUM M-MS-0808-9118 HBDGE1389D8---- VIEWSONIC TEXT LOGO VIEWSONIC TEXT LOGO M-MS-0808-9119 HBDGE1390D8---- LOGO PLATE (BIRDS LOGO) LOGO PLATE (BIRDS LOGO) M-MS-0808-5840 LBOSM1069D8---- BOSS FOR D-SUB AND DVI BOSS FOR D-SUB AND DVI...
  • Page 18 LANGF2133D8---- D-SUB METAL D-SUB METAL M-MS-0808-9117 PGUM-1124D8---- VESA GUM VESA GUM M-MS-0808-9118 HBDGE1389D8---- VIEWSONIC TEXT LOGO VIEWSONIC TEXT LOGO M-MS-0808-9119 HBDGE1390D8---- LOGO PLATE (BIRDS LOGO) LOGO PLATE (BIRDS LOGO) M-MS-0808-5840 LBOSM1069D8---- BOSS FOR D-SUB AND DVI BOSS FOR D-SUB AND DVI...
  • Page 19 VESA METAL M-BK-0805-0034 LANGF2133D8---- D-SUB METAL D-SUB METAL M-MS-0808-9117 PGUM-1124D8---- VESA GUM VESA GUM M-MS-0808-9118 HBDGE1389D8---- VIEWSONIC TEXT LOGO VIEWSONIC TEXT LOGO M-MS-0808-9119 HBDGE1390D8---- LOGO PLATE (BIRDS MARK) LOGO PLATE (BIRDS MARK) #N/A XEBSB30P14000-- CAB-B&CAB-A CAB-B&CAB-A HINGE SUPPORT WITH MAIN...
  • Page 20 VG510b-1 BOM Item ViewSonic P/N Ref. P/N Description Location Q'ty M-WR-0828-6016 QCNWS0906-8026- OSD-SW WIRE OSD-SW WIRE M-WR-0828-6015 QCNWS0904-8038- SPEAKER WIRE SPEAKER WIRE 100mm*4(PANEL WITH MAIN #N/A ZTAPEL025S030-- TAPE METAL),50mm*1(I/F COVER WITH D-SUB 500mm METAL),50mm*1(PANEL GROUNDING) #N/A PCUSS1264T8---- SPONGE 15mm*10mm*10mm #N/A...
  • Page 21 VG510b-1 BOM Item ViewSonic P/N Ref. P/N Description Location Q'ty #N/A VRMDNVG--202J-A SMT 2KO ±5% 1/16W R115.R142.R150.R151.R152.R3. #N/A VRMDNVG--203J-A SMT 20KO ±5% 1/16W R113. #N/A VRMDNVG--222J-A SMT 2.2KO ±5% 1/16W R32.R37. #N/A VRMDNVG--301J-A SMT 300O ±5% 1/16W R36. #N/A VRMDNVG--302J-A SMT 3.2KO ±5% 1/16W...
  • Page 22 VESA METAL VESA METAL M-BK-0805-0034 LANGF2133D8---- D-SUB METAL D-SUB METAL M-MS-0808-9117 PGUM-1124D8---- VESA GUM VESA GUM M-MS-0808-9118 HBDGE1389D8---- VIEWSONIC TEXT LOGO VIEWSONIC TEXT LOGO M-MS-0808-9119 HBDGE1390D8---- LOGO PLATE (BIRDS MARK) LOGO PLATE (BIRDS MARK) #N/A XEBSB30P14000-- CAB-B&CAB-A CAB-B&CAB-A #N/A XBPSB40P10JS0--...
  • Page 23 VG510s-1 BOM Item ViewSonic P/N Ref. P/N Description Location Q'ty 100mm*4(PANEL WITH MAIN #N/A ZTAPEL025S030-- TAPE METAL),50mm*1(I/F COVER WITH D-SUB 500mm METAL),50mm*1(PANEL GROUNDING) #N/A PCUSS1264T8---- SPONGE 15mm*10mm*10mm #N/A PCUSS1395D8---- SPONGE 10mm*10mm*10mm #N/A ZTAPEU025K030-- COPPER COPPER 50mm #N/A PCUSS1201T8---- SPONGE 20mm*4mm*3mm...
  • Page 24 Š-1 BOM Item ViewSonic P/N Ref. P/N Description Location Q'ty #N/A VRMDNVG--222J-A SMT 2.2KO ±5% 1/16W R32.R37. #N/A VRMDNVG--301J-A SMT 300O ±5% 1/16W R36. #N/A VRMDNVG--302J-A SMT 3.2KO ±5% 1/16W R146. #N/A VRMDNVG--330J-A SMT 33O ±5% 1/16W R127.R16.R18.R20.R22.R24.R26. #N/A VRMDNVG--331J-A SMT 330O ±5% 1/16W...

  • Page 25: Exploded Diagram And Spare Parts List

    8. Exploded Diagram And Spare Parts List Exploded Parts List VG510s-1 Item ViewSonic P/N Ref. P/N Location Q'ty M-MS-0808-9118 HBDGE1389D8---- VIEWSONIC TEXT LOGO M-MS-0808-9121 GCABA2331D8FT1- CAB-A E-SK-0412-0085 RSPKCL034D88FG- SPEAKER M-MS-0808-9115 HDECP1987D8F--- LENS PL-NB-0707-1072 JKNBP2358D8F--- KNOB M-BK-0805-0035 LANGF2130D8---- MAIN METAL B-SB-0221-0588...
  • Page 26 Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 27: Block Diagram

    12MHz 24C21 TO PANEL MTV312 EEPROM 12MHz 24C16 INVERTER 3.3V/2.5V SWITCH MODE POWER SUPPLY FROM QCNWS0905-8028- A/D ADAPTOR QCNWS0906-8026A QCODS1695T8-- CON1 CON1 INVERTER SW BOARD CON2 RUNTP5475T8---B CON3 DPWBN5570T8---- 15” LCD PANEL Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 28: Schematic Diagrams

    470uF 10nF 0.1uF 16v/DIP Sheet 5/8 50V type. DWG No. 470uF 470uF 1K/NC 0.1uF SS22 16v/DIP 16v/DIP Sep 25-2003 UPDATE All resistorwich are not otherwise 0.1uF M/P- specified are 1/6W. REV. Nr Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 29 VGA Input ZD5.6V All C's not otherwise specified are PWB-5559 PWB No. 50V type. Sheet 1/8 DWG No. Sep 25-2003 All resistorwich are not otherwise UPDATE specified are 1/6W. REV. Nr M/P- Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 30 VG510s / VG510b 2N3906 FB18 0603 4.7k LED_G FB19 0603 POWER PWB-5559 PWB No. KeyPad R91 100 Sheet 3/8 DWG No. 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF Sep 25-2003 UPDATE REV. Nr M/P- Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 31 0.01uF are 85 C type. Audio All C's not otherwise specified are PWB No. PWB-5559 AUDIO_GND AUDIO_GND 50V type. Sheet 6/8 DWG No. Sep 25-2003 UPDATE specified are 1/6W. REV. Nr M/P- Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 32 85 C type. DVI Input All C's not otherwise specified are PWB-5559 PWB No. 50V type. Sheet 7/8 DWG No. All resistorwich are not otherwise Sep 25-2003 UPDATE specified are 1/6W. REV. Nr M/P- Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 33 All resistorwich are not otherwise specified are 1/6W. PW_GND VG510s / VG510b MODEL THROUGH HOLE THROUGH HOLE Output Connector PWB-5559 PWB No. Sheet 4/8 DWG No. Sep 25-2003 UPDATE M/P- REV. Nr Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 34 VG510s / VG510b MODEL AGND C146 10nF 4.7nF 4.7nF 10nF Scaler 4.7uF C151 C152 C153 0.1uF 0.1uF PWB No. PWB-5559 0.1uF Sheet 2/8 DWG No. AGND AGND Sep 25-2003 UPDATE REV. Nr M/P- Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 35: Key Board

    85 C type. Key Board All C's not otherwise specified are 50V type. All resistorwich are not otherwise specified are 1/6W. PWB-5570 PWB No. Sheet 8/8 DWG No. Sep 25-2003 UPDATE M/P- REV. Nr Confidential - Do Not Copy ViewSonic Corporation VG510b/s...

  • Page 36: Pcb Layout Diagrams

    11. PCB Layout Diagrams Main Board Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 37 Control Board Confidential - Do Not Copy ViewSonic Corporation VG510b/s...
  • Page 38 Add.: Fax: Tel: 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) Confidential - Do Not Copy...

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