1. Manuals
  2. Brands
  3. ViewSonic Manuals
  4. Monitor
  5. VX750 VLCDS27089-1W
  6. Service manual

ViewSonic VX750 VLCDS27089-1W Service Manual

17” color tft lcd display
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual

Service Manual

ViewSonic VX7501
Model No. VLCDS27089-1W
17" Color TFT LCD Display
(VX750_SM_755 Rev. 1a Apr. 2004)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Advertisement

Table of Contents
loading

Related Manuals for ViewSonic VX750 VLCDS27089-1W

Summary of Contents for ViewSonic VX750 VLCDS27089-1W

  • Page 1: Service Manual

    Service Manual ViewSonic VX7501 Model No. VLCDS27089-1W 17” Color TFT LCD Display (VX750_SM_755 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 VX750...

  • Page 4: Precautions And Safety Notices

    In the case of a measurement exceeding the 1.0 milliamp value, a rework is required to eliminate the chance of a shock hazard . AC VOLTMETER 0.15u 1500 To Metal Parts Earth Ground Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 5: Specification

    Audio Amplifier : 5W x 2 (chip :TPA3002) AC Power range: 90 V ~ 264 V, 50 Hz / 60 Power consumption: < 50W green / < 1W amber (On / Off mode) Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 6: Front Panel Function Control Description

    Also a shortcut to Auto Image Adjust. INPUT SELECT : Also toggles between two controls on some screens. Main Menu With OnView controls Power On / Off Power light Blue = ON Orange = Power Saving Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 7 • 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 dislay.) Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 8 — Adds red to the screen image for warmer white and 6500K richer red. Default setting. — Adds green to the screen image for a darker color. 5400K Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 9 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 The Image Adjust controls are explained below: Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 10 Setup Menu The Setup Menu controls are explained below. Select allows you to choose the language used in Language the menus and control screens. advises the optimal resolution to use. Resolution Notice Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 11 OSD control screens you can also view open software applications, or the Windows desktop. returns adjustments to the original factory Memory Recall settings if the display is operating in a factory Preset Timing Mode listed in this user guide. Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 12: Circuit Description

    SIGNAL Red Video DB15HD Green Video Blue Video None Ground (DDC return) Red GND Green GND Blue GND +5V (for DDC) Sync GND None DDC Data Horizontal Sync Vertical Sync DDC Clock Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 13 TMDS positive differential input, channel 0 Logic Ground RX5- Reserved. No connection RX5+ 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 VX750...
  • Page 14 If the timing is within following specification, this LCD display can automatically function with a certain position. Horizontal: Sync frequency: 30~82 kHz Vertical: Sync frequency: 56~85Hz 3.4 Signal level and input impedance 3.4.1 Video Signal level: 0.7Vp-p Video signal. 3.4.2 Sync Signal level H/V Separate: TTL level Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 15 DATE: WED AUG 13, 2003 ______________________________________________________________________ ______________________________________________________________________ VIEWSONIC CORPORATION EDID VERSION # 1, REVISION # 3 DDCTEST FOR: VIEWSONIC VX750 ______________________________________________________________________ ______________________________________________________________________ 128 BYTES OF EDID CODE: ________________________________________ 0 | 00 FF FF FF FF FF FF 00 5A 63...
  • Page 16 1024 X 768 @ 60HZ (VESA) 1024 X 768 @ 70HZ (VESA) 1024 X 768 @ 75HZ (VESA) 1280 X 1024 @ 75HZ (VESA) (37) MANUFACTURER'S RESERVED TIMING: 1152 X 870 @ 75HZ (APPLE,MAC II) Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 17 MIN VERTICAL FREQ - 50 HZ MAX VERTICAL FREQ - 75 HZ MIN HORIZ. FREQ - 30 KHZ MAX HORIZ. FREQ - 80 KHZ PIXEL CLOCK - 140 MHZ SECONDARY GTF - NOT SUPPORTED Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 18 Date: Wed Aug 13, 2003 ______________________________________________________________________ ______________________________________________________________________ VIEWSONIC CORPORATION EDID Version # 1, Revision # 3 DDCTest For: ViewSonic VX750 ______________________________________________________________________ ______________________________________________________________________ 128 BYTES OF EDID CODE: ________________________________________ 0 | 00 FF FF FF FF FF FF 00 5A 63...
  • Page 19 1024 X 768 @ 75Hz (VESA) 1280 X 1024 @ 75Hz (VESA) (37) Manufacturer's Reserved Timing: 1152 X 870 @ 75Hz (Apple,Mac II) (38-53) Standard Timing Identification: 1280 X 1024 @60Hz 1280 X 960 @60Hz Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 20 Max Horiz. Freq - 80 KHz Pixel Clock - 140 MHz Secondary GTF - Not Supported (108-125) Detailed Timing / Descriptor Block 4: Monitor Name: VX750 (126) No Extension EDID Block(s) (127) CheckSum OK Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 21 .The analog RGB and synchronous signals are connected to MST1831A as described below: Pin Name Pin Number Red + Red - Green + Green - Blue + Blue - H sync V sync Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 22 U10 as a 2.5V regulator, Desired output voltage is determined by the equation Volt=1.25 x (1 + R124/R123)= 2.5 U11 as a 3.3V regulator, Desired output voltage is determined by the equation Volt=1.255 x (1+ R126/R125)= 3.3 Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 23 Input Current <1.5A Inrush Current <50A @ 120Vac(Cold start) Standby Input Voltage 12Vdc OUTPUT Output Voltage Regulation +/-5% Output Ripple and Noise 120 mVp-p Rated Output Current <4.16A Turn-on Delay <3 seconds Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 24: Adjusting Procedure

    Press “VOL-“Button to make Volume low. Press “Enter” Button to enter Mute Item. Press “1(Menu)(Menu)” Button to exit the item. Mute Item Press “Enter” Button to enter Volume Item. Press “1(Menu)” Button to exit the item. Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 25 Press “Enter” Button to enter the Horizontal Position option. Press “1(Menu)” Button to exit Vertical Position option. Press “Vol+” Button to make current option high. Press “Vol-“ Button to make current option low Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 26 Press “Enter” Button to enter the Vertical Position option. Press “1(Menu)” Button to exit Horizontal Position option. Press “Vol+” Button to make current option high. Press “Vol-“ Button to make current option low Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 27 (if it Mute is enable currently) Press”Enter” Button to switch Mute Dialog Press “1(Menu)” Button to exit the Volume Dialog. Press “Vol-“Button to make volume low. Press “Vol+”Button to make volume high. Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 28 Press “1(Menu)(Menu)Button to exit the page. Volume Item Press “VOL+” Button to make Volume high. Press “VOL-“Button to make Volume low. Press “Enter” Button to enter Mute Item. Press “1(Menu)(Menu)” Button to exit the item. Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 29 1) Language Select Item Press “Enter” Button to enter Language Select item. Press “1(Menu)” Button to exit Language Select item. Press Up Button to the previous option or Down Button to the next option. English,French……..Option Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 30 Press Up Button to the previous option or Down Button to the next option. (8) Memory Recall Page Press “Enter” Button to do the memory recall function. Press “1(Menu)” Button to exit the page. Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 31 Press Enter then Power on it will enter Factory Mode then it will add one Menu page named Factory Menu Press “Enter “ Button Enter Factory Menu item Then Press”Enter” Button Enter Burn Mode Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 32 1.2.2 Connect CN2 of Fixture to VGA Cable. 1.2.3 Connect VGA Cable to Analog Input of monitor. 1.2.4 Turn on the Monitor power. 1.2.5 Copy the “LM5ISP.exe” to NB. Cable Fixture F/W or DDC Update Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 33 LM5ISP Firmware Update 1.3.1 Run the “LM5ISP.exe” Program Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 34 1.3.2 Select the model name of Option Page Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 35 1.3.3 Read Firmware data from HEX File and then press “Action” Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 36 2.2.2 Connect CN2 of Fixture to VGA Cable. 2.2.3 Connect VGA Cable to Analog Input of monitor. 2.2.4 Turn on the Monitor power. 2.2.5 Copy the “LM5ISP.exe” to NB. Cable Fixture F/W or DDC Update Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 37 LM5ISP DDC Update 2.3.1 Run the “LM5ISP.exe” Program Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 38 2.3.2 Select the model name of Option Page Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 39 2.3.3 Read DDC data from Monitor. Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 40 2.3.4 Key in the New Serial Number and then press “Enter” key Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 41: Trouble Shooting Flow Chart

    Check Q10 Low level at Pin of U7? Change R11 or C107 R11 & C 107 OK? Check Q9 & Pin 74 of U3 Pin 1 of U7 Always < 1V? Change U7 Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 42 2. Display color abnormal: Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 43 3. Monitor can not power on Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 44 4. Monitor white screen Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 45 5. Monitor black screen Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 46 6. Audio noise: Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 47 7. Analog input: always shows NO SIGNAL: Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 48 8. Digital input: always shows NO SIGNAL Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 49: Recommended Spare Parts List

    7. Recommended Spare Parts List VX750-1 RSPL Recent Revision(s) Item Reference P/N ViewSonic P/N Description of revision(s) 26L7VSAVS09 C-BS-0303-0508 Removed to RSPL 38L7VEBVS02 PL-PS-0715-0981 Added to RSPL MF30050IBJ6 M-SCW-0824-0725 Removed to RSPL 34L7VSSVS05 PL-PS-0715-0982 Added to RSPL MM30050IBJ3 M-SCW-0824-0728 Removed to RSPL...
  • Page 50 VX750-1 VSE-E RSPL Item ViewSonic P/N Ref. P/N Description Location Universal number# Lead time Q'ty B-MB-0201-2728 21L7VSB0030 Main Board main board 4 weeks B-SB-0221-0596 AS022172511 Inverter inverter 4 weeks P-BX-0601-0936 HFL7V003010 Carton carton 4 weeks P-FM-0602-0845 HBL7V003016 Polyfrom (left) polyfrom...
  • Page 51 VX750-1 BOM Item ViewSonic P/N Ref. P/N Description Location Q'ty 1L7VZZZVS19 L7VX LCD MONITOR (VSC VX750) #N/A #N/A 21L7VSB0030 L7VX SCALAR/B ASSY(MST) 31L7VSS0032 L7VX SCALAR/B S/S ASSY(MST) #N/A #N/A DAL7VXTH2C1 PCB L7VX SCALER/B(2L,108*96,REVC) #N/A AJ08131CC06 IC(128P) MST8131A(135MHZ,FQFP) AKE3A8S0Y01 IC,EEPROM(8P) 24LC16B/SN(2K*8,100KHZ)
  • Page 52 Item ViewSonic P/N Ref. P/N Description Location Q'ty CS-1993F907 RES CHIP 4.99 1/10W +-1%(0603) R142,R143,R144,R145,R146,R147,R148,R149 #N/A CS-4993F905 RES CHIP 4.99 1/10W +-1%(0603) R142,R143,R144,R145,R146,R147,R148,R149 #N/A #N/A CX000300104 EMI FILTER CHIP FCM1608C-300T06 30,600MA L2,L3,L7 #N/A CS06803J905 RESISTOR CHIP 68 1/10W +-5%(1608) R3,R6,R10...
  • Page 53 Item ViewSonic P/N Ref. P/N Description Location Q'ty EAL7V005018 BACK COVER L7VX(EAL7V005,REV3A) 138 C-BC-0302-0605 139 M-CV-0830-2484 FBL7V007011 KENSINGTON CAP(FBL7V007,REV3A) FBL7V011019 VESA BKT L7VX(FBL7V011,REV3A) 140 M-BK-0805-0089 141 M-SCW-0824-0725 MF30050IBJ6 SCREW F3*5-I(NI) 142 M-MS-0808-7709 GAL7V004011 RUBBER PAD REAR(GAL7V004,REV3A) MF40080BJ29 SCREW F4.0*8-B(BNI) 143 M-SCW-0824-6797...

  • Page 54: Exploded Diagram And Spare Parts List

    8. Exploded Diagram And Spare Parts List Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 55 CABLE ASSY L7VX MB-LCD(30P,REV1A) M-MS-0808-7690 DD0LM7IV008 CABLE ASSY LM7S INVERTER(6P,REV1A) M-MS-0808-9582 DDL7VXTH004 CABLE ASSY L7VX MB-BUTTON1(8P,REV1A) M-MS-0808-9605 DDL7VXTH101 CABLE ASSY L7VX MB-BUTTON2(4P,REV1A) M-MS-0808-9606 FBL7V013011 FUNCTION PCB BKT L7VX(FBL7V013,REV3A) M-SCW-0824-0725 MF30050IBJ6 SCREW F3*5-I(NI) Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 56: Block Diagram

    PHONE J ACK EEPROM CN10 24LC16B Headphone EARPHONE OUT PHONE J ACK CN11 LM 4881M M CONNECTOR_2P CONNECTOR_3P CONNECTOR_8P CONNECTOR_4P CN14 CN13 SCALER BOARD KEY BOARD1 KEY BOARD2 L_SPEAKER R_SPEAKER POW ER FUNCTI ON Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 57: Volume Control

    (CN2) MST1831A (U3) 24C21 (U2) Audio Mute Speaker Assy Volume control Line in Out Connector2 (CN12) CN13 (2P) TPA3002D2 (U7) Out Connector1 Line out CN13 (3P) (CN10) LM4881 Earphone out (U8) (CN11) Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 58 Power 12V Input (From Adaptor) P-MQS AIC1563 NDS9410 For U2, U6, U5, PANEL (U9) (Q11) 3.3V TPA3002D2 LM4881 LT1117 (U7) For U3 (U11) 2.5V Inverter LT1117 For U3 (U10) Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 59: Schematic Diagrams

    10. Schematic Diagrams Button Board Function VOL- HDK632A DOWN 4501-08-8P-R HDK632A HDK632A IN-SEL HDK632A MENU HDK632A VOL+ HDK632A ENTER HDK632A Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 60 Button Board Power POWER IO HDK632A 4606-04-04P-R LED2 orange LED1 EL-209-2EGW blue EL-209-2EGW Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 61 5R/6 TX0- TX0- RX0- R147 5R/6 TX0+ TX0+ RX0+ Z5.6/NS Z5.6/NS RX5- RX5+ R148 5R/6 TXC+ TXC+ RXC+ R149 5R/6 TXC- TXC- RXC- 0.1U/6NC Z5.6/NC 1U/6NC Z5.6/NC Z5.6/NC 10K/6NC Z5.6/NC Z5.6/NC DVI-D Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 62 100/6 PWR_ON/OFF_O 100/6 100K/6 220/6 4.7K/6 R137 R138 LED_R 1U/6 12p/6/NS 4501-04-04P-R 4.7K/NC 2K/NC 5.1V/NC MMST3906 R139 PC5V_OFF 1K/NC 2N3904/NC 12p/6 12p/6 12p/6 0.1u/6 5.6K/6 4.7K/6 2N7002 BRIGHTNESS BRIGHTNESS PWR_ON/OFF_O 1u/8 DAN217K/NC Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 63 PB25 BCLKP CLKBN 22/6 FXDIO 22P/6 EINV OINV BXDIO OINV 14.318MHz GPO0 22/6 XOUT GPO0 GPO1 22/6 XSTB GPO1 22P/6 GPO2 YDIO GPO2 XTAL 0.1U/6 GPO3 YCLK BYPASS GPO3 GPO4 AVSS_LPLL GPO4 Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 64 FR1N BR1P FR1P BR1N FR2N BR0P FR2P BR0N FXDIO AF730B-A2G1T/NC XSTB BXDIO YCLK YDIO L C D V D D 0/8/NC 0/8/NC 0/8/NC MTH276D126 MTH276D126 0/8/NC LCDVCC 0/8/NC AF750B-A2G1T/NC 0.1U/6/NC 0.1U/6/NC MTH276D126 Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 65 AGND C108 1U/8 AGND VCLAMPL AGND AGND +12V CN13 SPKRO+ R113 10K/6 AGND TPA3002D2 SPKRO- 4501-03-03P-R R114 10K/6 MUTE C110 C111 CN14 SPKLO+ 0.01U/6 0.01U/6 SPKLO- 4501-02-02P-R +12V MTH276D126 AGND SPKLO+ SPKLO- Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 66 1nF/6 0.1u/6 1000u/6.3V RB081L-20 VDD2V5 0.8A Max VOUT CX000800000/1206 R123 200/6 C128 LT1117/TO223 100u/16V C129 R124 100u/16V 200/6 VDD3V3 0.8A Max VOUT CX000800000/1206 R125 200/6 C130 LT1117/TO223 100u/16V C131 R126 100u/16V 330/6 Confidential - Do Not Copy ViewSonic Corporation VX750...

  • Page 67: Pcb Layout Diagrams

    Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 68 Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 69 Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 70 Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 71 Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 72 Control Board Confidential - Do Not Copy ViewSonic Corporation VX750...
  • Page 73 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...

Table of Contents