ViewSonic VX750 Manual de Serviço

Model No. VLCDS27089-1W17” Color TFT LCD DisplayService ManualViewSonic VX7501ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 88

Fine Tune sharpens focus by aligning the illuminated text and/or graphic characters.NOTE: Try the Auto Adjust (see page 9) before using the FineTune c

Memory Recall returns adjustments to the original factory settings if the display is operating in a factory Preset Timing Mode listed in this user gui

1. Outline wer On/Off, up arrow button, down arrow button, VOL- button, VOL+ button, 1MENU button, 2Enter 1.2 n receptacle, audio line-out receptacl

2.4 Video signal connector for digital input: 24pin DVI-D connector

3. ELECTRICAL SPECIFICATIONS 3.1 Standard conditions Display Area 337.9 x 270.3 mm Video Signal 0.7Vpp Contrast Max. Brightness Max. Ambient 20 +

5. EDID DATA 18.1 Analog EDID TIME: 15:48:11 DATE: WED AUG 13, 2003 ________________________

(20) VIDEO INPUT DEFINITION: ANALOG SIGNAL 0.700, 0.300 (1.000 VP-P) SEPARATE SYNCS, COMPOSITE SYNC, SYNC ON GRE

NOT USED NOT USED NOT USED NOT USED ______________________________________________________________________ (54-71)

MONITOR NAME: VX750 (126) NO EXTENSION EDID BLOCK(S) (127) CHECKSUM

(18) EDID Version Number = 1 (19) EDID Revision Number = 3 (20) VIDEO INPUT DEFINITION: Digital Signal

CopyrightCopyright¤ 2004 by ViewSonic Corporation. All rights reserved. No part of this publication may bereproduced, transmitted, transcribed, stor

1152 X 864 @75Hz 640 X 400 @70Hz Not Used Not Used Not Used Not Used (54-71) Detailed Timing

6. THEORY OF OPERATION This section describes the function of the LCD monitor per functional block. This monitor includes MB board, inverter board, a

d) OSD: The MST1831A has a fully programmable, high-quality OSD controller. The on-chip static RAM stores the cell map and the cell definitions. e) O

6.2 Audio Amplifier TPA3002D2 (U7) The TPA3002D2 is a 9-W per channel efficient, Class-D audio amplifier for driving bridged-tied stereo speakers.

OSD Function Menu A For Analog Input Mode 1. Main Menu Press “1(Menu)” Button (Menu Button) to enter Main Menu: Press Up Button to the previous pa

(5) Color Adjust Page: Press “Enter” Button to enter Color Adjust page. Press “1(Menu)” Button to exit the page. Press Up Button to the previou

2) Horizontal Size Item Press “Enter” Button to enter Horizontal Size item. Press “1(Menu)” Button to exit Horizontal Size item. Press “Vol+” Bu

b) Vertical Position Option: Press “Enter” Button to enter the Horizontal Position option. Press “1(Menu)” Button to exit Vertical Position option. P

(4) Mute Dialog Press “Vol+”or “Vol-“Button to enter the Mute Dialog (if it Mute is disable currently). Press”Enter” Button to switch volume Dialog

Mute Item Press “Enter” Button to enter Volume Item. Press “1(Menu)” Button to exit the item. (4) Color Adjust Page: Press “Enter” Button to e

TABLE OF CONTENTS 2. Specification3. Front Panel Function Control Description4. Circuit Description6. Trouble Shooting Flow Chart9. Block Diagram10.

2) Resolution Notice Item 3) Press “1(Menu)” Button to exit Resolution Notice item. Enable,Disable Option Press “Enter” Button to select the option.

3. Other Menu: (1) Contrast Dialog Press Down or Up Button to enter the Contrast Dialog. Press “1(Menu)” Button to exit the Contrast Dialog. Press “

LM5ISP Update Procedure 1 Firmware Update Procedure 1.1 Equipment Needed 1.1.1 VX750 Series monitor. 1.1.2 Fixture for Firmware update. 1.1.3 VGA Ca

1.3 LM5ISP Firmware Update 1.3.1 Run the “LM5ISP.exe” Program 30ViewSonic Corporation Confidential - Do Not Copy VX750

1.3.2 Select the model name of Option Page 31ViewSonic Corporation Confidential - Do Not Copy VX750

1.3.3 Read Firmware data from HEX File and then press “Action” 32ViewSonic Corporation Confidential - Do Not Copy VX750

2 DDC Update Procedure 2.1 Equipment Needed 2.1.1 VE710s/b or VX750 Series monitor. 2.1.2 Fixture for DDC update. 2.1.3 VGA Cable. 2.1.4 Computer (N

2.3 LM5ISP DDC Update 2.3.1 Run the “LM5ISP.exe” Program 34ViewSonic Corporation Confidential - Do Not Copy VX750

2.3.2 Select the model name of Option Page 35ViewSonic Corporation Confidential - Do Not Copy VX750

2.3.3 Read DDC data from Monitor. 36ViewSonic Corporation Confidential - Do Not Copy VX750

1. Caution : No modification of any circuit should be attempted . Service work should only be performed after you are thoroughly familiar with all of

2.3.4 Key in the New Serial Number and then press “Enter” key 37ViewSonic Corporation Confidential - Do Not Copy VX750

1. Speaker no sound 6. Trouble Shooting Flow Chart 38ViewSonic Corporation Confidential - Do Not Copy VX750Speaker no soundEnter Mute Mode?

2. Display color abnormal: 39ViewSonic Corporation Confidential - Do Not Copy VX750

3. Monitor can not power on 40ViewSonic Corporation Confidential - Do Not Copy VX750

4. Monitor white screen 41ViewSonic Corporation Confidential - Do Not Copy VX750

5. Monitor black screen 42ViewSonic Corporation Confidential - Do Not Copy VX750

6. Audio noise: 43ViewSonic Corporation Confidential - Do Not Copy VX750

7. Analog input: always shows NO SIGNAL: 44ViewSonic Corporation Confidential - Do Not Copy VX750

8. Digital input: always shows NO SIGNAL 45ViewSonic Corporation Confidential - Do Not Copy VX750

Item Reference P/N ViewSonic P/N Description of revision(s)11c 26L7VSAVS09 C-BS-0303-0508 Removed to RSPL11d 38L7VEBVS02 PL-PS-0715-0981 Added to RSPL

x H x D ) mm 502 x 405 x 195 mm d: mm mm mm ering ) Tf / typical) te : /m² / 9300°K Hz Mechanical : Dimension ( WSet a. with stand:

Item ViewSonic P/N Ref. P/N Description Location Universal number# Lead time Q'ty1 B-MB-0201-2728 21L7VSB0030 Main Board main board 4 weeks 12 B

Item ViewSonic P/N Ref. P/N Description Location Q'ty1 #N/A1L7VZZZVS19 L7VX LCD MONITOR (VSC VX750)2 #N/A21L7VSB0030 L7VX SCALAR/B ASSY(MST) 13 #

Item ViewSonic P/N Ref. P/N Description Location Q'ty63 #N/ACS-1993F907 RES CHIP 4.99 1/10W +-1%(0603) R142,R143,R144,R145,R146,R147,R148,R149 86

Item ViewSonic P/N Ref. P/N Description Location Q'ty138 C-BC-0302-0605EAL7V005018 BACK COVER L7VX(EAL7V005,REV3A) 1139 M-CV-0830-2484FBL7V007011

8. Exploded Diagram And Spare Parts List 51ViewSonic Corporation Confidential - Do Not Copy VX750

Item View Sonic P/No Part Number Part Description Qty1 B-MB-0201-2728 21L7VSB0030 L7VX SCALAR/B ASSY(MST) 12 B-SB-0221-0596 AS022172511 INV MODULE(TDK

9. Block Diagram System block diagram VX750 System BLOCK DIAGRAMEEPROM24LC16BU5CRYSTAL14. 318MHzX1CRYSTAL11. 0592MHzX2LDOAIC1117CYU10PWMCONTROLLERAI

Video Audio Mute Speaker Assy Volume

Power 12V Input (From Adaptor) AIC1563 (U9) TPA3002D2(U7) P-MQS NDS9410(Q11) LT1117(U11) LT1117(U10) For U2, U6, U5, PANEL For U3 For U3 5V LM4

CN14501-08-8P-R12345678 Button Board Function 10. Schematic DiagramsCN14501-08-8P-R12345678SW2HDK632A1324SW3HDK632A1324SW4HDK632A1324SW5HDK632

Adjusting the Screen ImageUse the buttons on the front control panel to display and adjust the OnView®controls which display on the screen. The OnView

Button Board Power CN24606-04-04P-R1234LED2EL-209-2EGWA1CA2LED1EL-209-2EGWA1CA2SW1HDK632A1324POWER IOblueorange 57ViewSonic Corporation Confident

D7Z5.6/NC2 1SCL-VGA 4HSYNC 5RED+IND8Z5.6/NC2 1R143 5R/6SCL-DDDCTXC-+5VTXC+ 5SDA-VGA 4VGA_SDA_OVGA_SDA_ODDC-SCLDSUB_5VVGA_CON_OR25 100/6D15Z5.6/NC2 1L7

SDA5X211.0592MHzL15 1K/61 21SDA-VGASCL-VGAMH0003R48 100/61 2D28DAN217K/NC123PWR_SELD27DAN217K/NC123BRIGHTNESSC5522P/612+5VL16 1K/61 2VDDCTRL_1 6SDA_OV

HSYNC3TX1-3PB10PA18C220.1U/6BCLKP 6PB11LVB2M 6VDD3V3FB2N 6R31 100/6PA6C1330.1u/612BG0N 6BLUE+3PA11PB3PA22R32 100/6R33 22VDD3V3GPO0C340.1U/6TXC+3BCLKN

FB2N5LVB2PBCLKN3C742200P/61 2BB0N5R8703BG1P51H3MTH276D1262345 6789L290/8/NCVDDCTRL_1 4BCLKP5BFB2P5LVACKP+5VFXDIO5R8910K/6/NC12LCDVCCBBB0P5BR1N5FR1N511

C87220P/6L36AGNDD381N4148R100 47K/6C1051U/612+5VR97 10K/6AGNDAGNDSPKLO-C79 1u/8AGNDL34AGND+12VSPKLO+R10720K/6VAROLleft_inC1110.01U/6+12VR111 120K/6C96

VDD2V5L46CX000800000/1206+5VU10LT1117/TO2231234ADJVOUTVINOUTC123330u/16VC1260.1u/612L41R6H6-3Ts1 2C1190.1u/81212VDDU11LT1117/TO2231234ADJVOUTVINOUTR12

11. PCB Layout DiagramsMain Board 64ViewSonic Corporation Confidential - Do Not Copy VX750

65ViewSonic Corporation Confidential - Do Not Copy VX750Main Board

66ViewSonic Corporation Confidential - Do Not Copy VX750Main Board

. (The black border around the edge of the screen should barely touch the illuminated “active area” of the LCD dislay.)The line at the bottom of the s

Main Board 67ViewSonic Corporation Confidential - Do Not Copy VX750

68ViewSonic Corporation Confidential - Do Not Copy VX750Main Board

69ViewSonic Corporation Confidential - Do Not Copy VX750 Control Board

*Readers Response*Dear Readers:Thank you in advance for your feedback on our Service Manual,which allows continuous improvementof our products. We wo

Main Menu ControlsAdjust the menu items shown belowbyusing the up Iand downJbuttons. Control ExplanationAuto Image Adjustautomatically sizes, ce

Informationdisplays the timing mode (video signal input) coming from the graphics card in your computer. See your graphic card’s user guide for instru