ViewSonic VA521 Manuel de service

Model No. VLCDS27996-1W15” Color TFT LCD DisplayService ManualViewSonic VA521ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888

Main Menu ControlsAdjust the menu items shown below by using the up Iand down Jbuttons. Contro ExplanationAuto Adjustautomatically sizes, center

VESA 1024 x 768 @ 60 Hz (recommended) means that the resolution is 1024 x 768 and the refresh rate is 60 Hertz.H. Size (Horizontal Size) adjusts the w

Resolution NoticeFor best picture qualitychange the resolution to1024 x 7681:EXIT 2:DISABLEthe menus and control scr

(VA521/VE510s-2/VE510b-2 Realtek Scaler) A. AC-DC CONVERTER The power supply with a high-integrated green-mode PWM controller provides several feat

PLL:8 pins Name I/O Pin No Description Note XO AI 1 Reference clock output XI AO 2 Reference clock input DPLL GND AG 3 Ground for digit

73 BG2P BG2P TODP BGRN [5] / T4 BGRN [5] BGRN [5] 74 BG2N BG2N TODN BGRN [4] / T5 BGRN [4] BGRN [4] 75 BG1P BG1P TOCLKP BGRN [3] / T6 BGR

108 AR1N NC NC ARED [2] / TK ARED [2] ARED [2] 113 PWM2 / COUT / TCON [12] PWM2 / COUT / TCON [12] PWM2 / COUT / TCON [12] ARED [1] COUT PWM2

PWM1 / TMDS_TST AIO 9 PWM1/ TMDS_TEST Pin/ Power-on-latch for serial / parallel port (2), (7), (8) PWM1 / DDCSDA / TCON [1] / BBLU [0] IO 47 PWM1

In 3.3V power system, the VDD and VDD3 are connected to 3.3V power, all output pins swing from 0~3.3V, HSYNC, VSYNC and open drain pin can accept 0~5V

5.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS 1. Approximately 30 minutes should be allowed for warm up before proceeding. 2. Adjustments should be under

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

(VA521/VE510s-2/VE510b-2) 6.1. NO POWER or BACKLIGHT NO POWER3.3V on P801pin5,6 to GND12V on P802pin3 to GNDNO BACKLIGHT.Check P802 pin2 with3.3V

6.2. NO DISPLAY (Realtek Scaler) NoDisplayCheck LED ColorCheck PowerregionRefer to NO POWERtrouble shoot flow charCheck IO cable isconnect OK ?Amb

ViewSonic Model Number: VLCDS27996Rev: 1bItem ECR/ECN ViewSonic P/N Ref.P/N Location Q'ty1Accessories:POWER CORDUSA WALL 1.83M BLACKA-P

ViewSonic Model Number: VLCDS27996Rev: 1cItem ECR/ECN ViewSonic P/N Ref. P/N Location Q'ty1Accessories:POWER CORD USA WALL 1.83M BLACK

ViewSonic Model Number: VLCDS27996Rev: 1cItem ECR/ECN ViewSonic P/N Ref.P/N Location Q'ty1Accessories:POWER CORD USA WALL

ViewSonic Model Number: VLCDS27996Rev: 1cItem ViewSonic P/N Ref. P/N Location Q'ty1 M-LB-0813-0856 2055613379 LABEL ViewSonic CONTAINER LABEL 6P1

Item ViewSonic P/N Ref. P/N Location Q'tyDescription20 #N/A 2403702513 SWITCH,TACT TSTA-2 4.3mm 160g HUA JIE S701 S702 S703 S704 S705 521 E-

Item ViewSonic P/N Ref. P/N Location Q'tyDescription84 E-IC-0450-0041 2365929996 IC,DIGITAL SMD MTV312M64-AJ PLCC44 MYSON I104 185 E-IC-0401

Item ViewSonic P/N Ref. P/N Location Q'tyDescription163 #N/A 2232412295 RES,CBN 1/4 RD 1/4W 1.2Kohm P=10.0 J T R824 1164 #N/A 2242330595 HIGH

ViewSonic Model Number: VLCDS27996Rev: 1a Item ViewSonic P/N Ref. P/N Location Q'ty1 M-LB-0813-0856 2055613379 LABEL ViewSonic CONTAINER LABEL 6P

TABLE OF CONTENTS 2. Specification3. Front Panel Function Control Description4. Circuit Description9. Block Diagram10. Schematic Diagrams7. Recommen

Item ViewSonic P/N Ref. P/N Location Q'tyDescription14 #N/A 2346247396 CAP,CHIP 125'C CS 0603/X7R/25V 0.047u K T C102 RBC103 R

Item ViewSonic P/N Ref. P/N Location Q'tyDescription51 M-CV-0830-0281 2027258402 DUST COVER VA521 ABS 94HB AL-PALTE 5B07 252 M-SCW-0824-6719 2082

Item ViewSonic P/N Ref. P/N Location Q'tyDescription127 E-C-0405-4324 2301510391 CAP,MTL CF93M 0.010UF 100V J T C821 RB 1128 #N/A 2287

Item ViewSonic P/N Ref. P/N Location Q'tyDescription203 #N/A 2253351596 RES,CHIP 1/8 RC 0805 1/8 W 5.1Mohm J T R903 1204 E-R-0405-2983 22513

ViewSonic Model Number: VLCDS27996Rev: 1a Item ViewSonic P/N Ref. P/N Location Q'ty1 M-LB-0813-0856 2055613379 LABEL ViewSonic CONTAINER LABEL 6P

Item ViewSonic P/N Ref. P/N Location Q'tyDescription21 E-Q-0402-1607 2360100796 XISTOR,PNP R SMD MMBT3906 SOT-23 DIODESQ101 RBQ102

Item ViewSonic P/N Ref. P/N Location Q'tyDescription81 #N/A 2253310596 RES,CHIP 1/8 RC 0805 1/8 W 1Mohm J T R909 R920 282 #N/A 2407200991

Item ViewSonic P/N Ref. P/N Location Q'tyDescription161 E-Q-0402-7031 2360608696 FET,N-CH(SMD) AO4826 SO-8 AO I902 RB 1162 M

1-1V9018X49X434X224X218X61714-125X2261620-12123X2X5222671011131215-1FIG.1MAIN PCB ASS'YPOWER PCB ASS'Y4X2KEYPAD PCB ASS'YFIG.1X22519X25

LCD PANELPOWER PCBP701P801P981KEYPAD PCBMAIN PCBI/O CABLEP961P902P901P107P105P102P101P801P802(for M-Star Scaler)P107(for Realtek Scaler)P101P104MAIN P

This monitor is manufactured and tested on a ground principle that a user's safety comes first. However, improper WARNINGS before installing an

ViewSonic Model Number: VLCDS27996 Rev: 1bItem ViewSonic P/N Ref.P/N Q'TY Location Remark1 C-FP-0301-0993 2024266703FRONT BEZEL ASS'YABS 94

ViewSonic Model Number: VLCDS27996 Rev: 1cItem ViewSonic P/N Ref.P/N Q'TY Location Remark1 C-FP-0301-09652603307566FRONT BEZEL ASS'Y ABS 94

8-3 Procedure of Disassembly This section provides disassembly procedures for VA521, VE510b/s-2 LCD Monitor. Before you begin any of these procedur

Disassembly of Rear Cover, Keypad Board and LCD Panel 1. Unscrew two screws that secure Keypad Board. 2. Detach Rear Cover and LCD Panel module f

6. Disconnect three connectors to remove Inverter connector and LCD Panel FPC cable. 7. Unscrew four screws that secure Metal Fitting and remove LCD

Disassembly of Main Board, Keypad Board and Power Board 1. Unscrew four screws that secure Main Board and disconnect the wires which

Disassembly of Stand unit from Rear Cover 1. Unscrew six screws that secure Stand unit and detach Stand unit from the moni

44ViewSonic Corporation Confidential - Do Not Copy VA5219. Block Diagram VE510b/s-2ADJBACKLITE12VINTCSZGSCLDDC-SCLH-SyncBRI106DC / DCI101RT

SOT-2235.0V(AU)D116,D117 0 OHM 1206 (AU)Q105, Q109, R181, R183, R185 NC (AU )RTD 3DVCCTMDS_3AVCCRTD 3PVCCADC_ 3AVCC3V3_PANEL3V33V3_PANEL12V12V3DVCCVC

RED+CB-CGRED-CRBLUE+GREEN-CR-CBGREEN+CG-RED-GREEN-RED+GREEN+BLUE-BLUE+H_SYNCH_SyncVGA_CONV_SyncV_SYNCSDA_VGASCL_VGAPC5VBLUE-CBCB-CRCR-CGCG-DDC_CLKDDC_

2.1. PRODUCT SPECIFICATION LCD Panel 15.0" TFT Power Management Energy Star compliant VESA DPMS compatible < 1W Displayable R

Near to ChipC160.C161.C162盡量靠近ICVA721(A) R164, R166, R168, R170 0R 0805 R165, R167, R169, R198 NCVA521(A) RN5, R193, R194 NCVA721(A) R

2 (E)3 (C)1 (B)UPDOWN21powerorangepowergreen2downWP1upLED_GGREENLED_OorangeLED_GLED_ORTD_SCLKRTD_SDO_OR_SDIRTD_SCSBDDC_CLKDDC_DATonPanel_12VonPanel_3V

I803573.3V 1A(1) SMD resistor - power rating is 1/6W,if not indicated(2) SMD capacitpr - temperture is 85'C & voltage is 50V,if not indicated

ONOFF1550V 1450v475,F--W48NCHANNSTAR- SXA1 5.9mAHANNSTAR- SXA1 5.8mA(1) SMD resistor - power rating is 1/8W,if not indicated(2) SMD capacitpr - temp

11. PCB Layout Diagrams 11-1 MAIN PCB TOP VIEW 51ViewSonic Corporation Confidential - Do Not Copy VA521 VE510b/s-2

11-2 MAIN PCB BOTTOM VIEW 52ViewSonic Corporation Confidential - Do Not Copy VA521 VE510b/s-2

11-3 CON PCB TOP VIEW11-4 CON PCB BOTTOM VIEW 53ViewSonic Corporation Confidential - Do Not Copy VA521 VE510b/s-2

11-5 POWER PCB TOP VIEW 54ViewSonic Corporation Confidential - Do Not Copy VA521 VE510b/s-2

11-6 POWER PCB BOTTOM VIEW 55ViewSonic Corporation Confidential - Do Not Copy VA521 VE510b/s-2

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

ITEM 6 7 8 9 10 TIMING 640×480@85Hz 720×400@70Hz 800×600@56Hz 800×600@60Hz 800×600@72Hz Pixel Rate 36.000MHz 28.322MHz 36.000MHz 40.000MHz 50

H B-Porch 1.869us 2.235us H Width 1.765us 1.219us H Border 0.000us 0.000us V TOTAL 13.889ms 13.328ms V DISPLAY 13.234ms 12.795ms V B-Po

Scroll through menu options and adjust the displayed control.Displays, saves changes to, and exits the Main Menu.Power On/Off Selects a highlighted co

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