ViewSonic VG800-2 Service Manual

Service ManualModel No. VLCDS23896-5W18” Color TFT LCD DisplayViewSonic VG800bViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888

3.3.4 Signal Timing3.3.4.1 User Timing Mode memory always do auto image adjust after timing mode change 3.3.4.2 Timing mode Changemaximum tim

3.6 Display Characteristics 3.6.1 Picture Size Horizontal Width 357.12 mm (typical) Vertical Width 285.70 mm (typical) 3.6.2 Optical Charac

BM-7500mm2 Degree Notes: (Note 1) Contrast ratio is defined as the following formula. Contrast ratio = Brightness(Luminance) with all pixels at &qu

100㧑90㧑10㧑0㧑TFTROpticalResponseWhiteWhite(TFT OFF)Black(TFT ON) White(TFT OFF)(Note 4) Judge points for brightness uniformity Brightness uniformity is

3.6.3.LCD PanelMechanicalActive Area (mm) 357.12 x 285.696 Pixel pitch (mm) 0.279 (0.093x3) Mass typical (g) 2500Panel dimensions (WxDxH) mm404x322.

3.7 Power ManagementVG800b will enter power saving mode under the following conditions: Power Management condition and status State Signals P

Serial No. (5-digit) Manufacturing week Last digit of manufacturing year Regional Product ID Code : VG800b:A1P4.3 Base Rotation Tilt:

4.6 UPC Coding (Code 39 format) Worldwide Model UPC Code:766907 710854ViewSonic Corporation Confidential – Do Not CopyVG800b14 4.7 PCB Revision Co

5. Packaging 5.1 Carton Box Dimensions: 565(W) x 525(H) x 260(D) mm Color: 4-Color printing boxMaterial: BC-FLUTE or Equivalent, double wall6. Enviro

Appendix I Preset Signal TimingsH totalH pulseH front H backHorizontalV totalV pulseV frontV backV activeVerticalH-VideoH activeV-VideoViewSonic Corp

CopyrightCopyright¤ 2002 by ViewSonic Corporation. All rights reserved. No part of this publication may bereproduced, transmitted, transcribed, stor

Analog timing mode table mode 1 2 3 4 5signal name symbol text Dos-text VGA MAC 14" VGAH-frequency(khz) 31.468 31.468 31.468 35 37.862V-frequen

V-sync Polarity NegativeNegativeNegative Positive PositiveH-resolution(dots) 640640800 800 800V-resolution(lines) 480480600 600 600mode 11 12 13 14 1

H-total Thd134413121376 1688 1688H- front porch Tv241648 48 16V-sync Tvs63333V-back porch Tvb292836 38 38V-total Tvd806800808 1066 1066V-front porch

Appendix II EDID Code analog012345678900 00 FF FF FF FF FF FF 00 5A 6310 0E 23 01 01 01 01 01 0C 01 0320 0E 24 1D 78 2A 16 76 A2 5A 4B30 97 24 18 4F

Bar Code label/Serial No Label PCB Assembly Revision Control L18CMW 05ACW(CMO)0200-001C10210MCU Revision Label VG800 bCMOP01ViewSonic Corporation Con

Front Panel Function Control Description User control functions Control buttons : 12-+1. press power button to power on whole LCD monitor set. Led on

5 After making adjustments, press the [1] button exit the screen, must out the OSD then will save the menu.Auto Image Adjust automatically sizes, cent

Brightness adjusts background black level of screen image. [ϧ] increase brightness, ˮϰ] decrease brightness. Audiopress ˮϰ] or [ϧ] button to scroll de

Bass/Treble adjusts the high (treble) and low (bass) frequency audio outputPress [2] button to select Bass or Treble adjustment.Bass press ˮϰ] or [ϧ]

!fine tune the color response. 9300K—Adds blue to screen image for cooler white (used in most office settings with fluorescent lighting). 6500K—

TABLE OF CONTENTS 1..SPECIFICATIONS...1.2...

H/V Position Press the [2] button to select H-Position or V-Position. H-Position moves screen image left or right. ʳʳˮϰ] move screen image to left, [ϧ

Sharpness adjusts the clarity of a non-SXGA (1280 x 1024) RGB signal Press ˮϰ] or [ϧ] to adjust. Scaling adjusts the video input signal to the screen

Language Select allows the user to choose from available languages. Resolution Notice press the ˮϰ] or [ϧ] button to select the Enable or Disable the

!OSD BackgroundMemory RecallReturns the adjustments back to factory settings (only if the display is operating in a factory preset mode).Press the [2]

OSD Auto Save The OSD shall save new settings when it is turned off by the user or when it times out. There shall not be a separate save. ViewSonic C

3.CIRCUIT DESCRIPTIONContents*. Function Block A. Interface Board1. Power Supply (DC/DC Converter)2. Micro-Controller3. Image processor(scalar)4

Circuit Description *. Function Block A. Interface1. Power Supply (DC/DC Converter) ICM1 is a current mode switching regulator controller that dri

!!returned to this pin. Pin5 (SW) are switch node connections to inductors. In step-down applications the voltage swing at this pin from a schottky di

!!3. Image Processor ICM11(gm5020) is an all-in-one image processor for displays with a dual (analog and digital)interface supporting resolutions up t

!The external frame buffer provides the storage required for the frame rate conversion process and the integrated OSD. The gm5020 is able to operate w

1.PRECAUTIONS AND NOTICESPrior to using this manual, please ensure that you have carefully followed all the proceduresoutlined in the user manual for

!When transmitting, data bits D0 through D27 are each loaded into registers upon the edge of the input clock signal (CLKIN). The rising or falling edg

!5. DDC 2 B ICM6 & ICM7 (24LC21A) can continuously transmit its extended identification, “EDID” using DDC1 communication channel. In addition, th

!PIN FUNCTION DESCRIPTION: B. Audio Board 1. Audio processor ICA2 (PT2313L) is a four-channel digital audio processor utilizing CMOS Technology .Volum

!!PIN# PIN NAME I/O DESCRIPTION 1 REF - Analog reference voltage(1/2 VDD) 2 VDD - Supply input voltage 3 Agnd - Analog ground 4 Treb_L I

!Pin 8 is the mute/stand-by Pin 7 is the voltage input for ICA1 ViewSonic Corporation Confidential – Do Not CopyVG800b41

!Troubleshooting Flow ChartA1. Figure of Waveform FIG 1. 12V FIG 2. 5V FIG 3. 3.3V F

! FIG 7. V-SYNC FIG 8. 24M CLOCK FIG 9. MEMORY CLOCK FIG 10. DISPLAY CLOCK FIG 11. DISPLAY H-SYNC FIG 1

! FIG 13. DISPLAY ENABLE FIG 14. MCU CLOCK FIG 15. LVDS TX0+ FIG 16. LVDS TX0- FIG 17. LVDS CLOCK+ FIG 18. L

!! FIG 19. AUDIO SINE SIGNAL IN FIG 20. AUDIO SINE SIGNAL OUT A2. No Display on Screen (Screen is black, LED is off) -checjkCheck that C

!!A3. No Display on Screen ( LED is green) NOYESNOIs the backlight lit? Check that the signal cable is fully connected to JM9,JM10, JM11Check that the

2. SPECIFICATIONSContent1.Scope2. General Description (Quick Reference) 3. Electrical Characteristics 4. Mechanical Characteristics 5. Packaging

!!A4. No Power On Check that JM1 Pin1 is approximately 12VYES NO Check that ICM1 PIN8 and ICM2 Pin 5, 6, 7, 8 is 12V Failure point 1. AC adapter failu

!!A5. No Sound (Test signal: ) YESYES NOCheck that ICA3 Pin 7 is approximately 12V Check that ICA1 Pin 3 is approximately 9V Check that ICM20 Pin4 is

A6. Show “No Signal” on screen ( Test pattern: 32 gray 1280X1024 60HZ ) A7. Keypad can not work Check the signal level of RM9, RM10,RM11 is FIG 5. YES

4. ADJUSTMENTCONTENTSA. INSTRUMENT ALIGNMENT1.PREPARATION OF MANUAL ALIGNMENT2. COLOR TEMPERATURE ALIGNMENT3. FACTORY PRESET SETTINGViewSonic Corpor

1. Preparation of manual alignment. 1.1 The alignment procedure is performed after unit has been completely assembled and before set inspection.1.2 Be

Use “UP” and “DOWN” to move cursor between items “9300”, “6500”, “5400” AND “5000”. Press “2” to select which co

temperature adjustment. When exit factory mode OSD menu, the above result R, G, B gains will automatically be saved. 2.2 6500°K alignment. 2.2.1 Us

5000°K ĺx = 0.346±0.030, y = 0.359±0.030 Y>= 190CD/M2. 2.4.3 Press “1” to exit 5000 color temperature adjustment and do another color tempe

5. MECHANICAL ASSEMBLYViewSonic Corporation Confidential – Do Not CopyVG800b55

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1. Scope The following specifications are applicable to model VG800b 18 inch color LCD monitor. 2. General Description (Quick Reference) Chi-Mei 18.0”

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!ViewSonic Corporation Confidential – Do Not CopyVG800b60MECHANICAL PARTS LISTITEM VIEWSONIC P/N DESCRIPTION REFERENCE NUMBER QTY1. M-LCD-0826-0124

6. SPARE PARTS LISTS!!ViewSonic Corporation Confidential – Do Not Copy61VG800 B RECOMMENDED SPARE PARTS LISTNo. VIEWSONIC P/NDESCRIPTIONREFERENCE NUM

ITEM VIEWSONIC P/N DESCRIPTION ALT GROUP REF NO DESI MFG PART QPA UMGN NO ITEMTEXT1 ADAPTOR DC 12V 60W 1 ...0993009600 ADP-60WB A 1 PCE2 A-A

48 PL-NB-0707-0176 KNOB FUNCTION PC+ABS 94V0 1 ...3360623700 1 PCE49PLASTIC ABS+PC 94V0 VSC 03BGN AA 100 % 1 .2 ...4020371508GN-5008HFVSC0

99 M-WR-0828-0643WIRE WITH HOUSING 20276 #30L= 1 ...3670170000 1 PCEPANEL+MAINBD100 M-WR-0828-0641 WIRE WITH HOUSING 1007 #28 1 ...3670459

153 RES CH 1/10W 560 F 0603 ...4 ...0341421300 R26 2322 704 65601 1 PCE154 RES CH 1/10W 560 F 0603 ...4 ...0341421300 R31 2322 704 65601 1 PCE15

221 E-D-0403-2050 DIO SW 0.2A 70V SOT-23 SE. BG 0 ...4 D18 BAV99 1 PCE222 E-D-0403-2050 DIO SW 0.2A 70V SOT-23 SE. BH 0 ...4 D19 BAV99 1 PCE223 E-D-

Current Rating AC input DC input 0.7A4.0A@AC 100-240V @DC 12.0V Dimensions Net Gross436 (W) x 462 (H) x 181 (D) mm 565 (W) x 525 (H) x 260 (D) mm Wei

273 E-Q-0402-1554FET 60V 0.115A 7.5ohm SOT-23 AI100 %...4...242522500005 Q24 2N7002LT1 1 PCE274 E-Q-0402-1554FET 60V 0.115A 7.5ohm SOT-23 AJ100

318 PAPER PAD 365*270*5 ...6 ...3510142200 0.023 PCE319 TRAY PVC ...6 ...3520386000 0.012 PCE320 WIRE CU 0.04 IEC317 G3 NAT(3KV ...5 ...40100

381 TAPE W=16 PB-416F AA 100 % ...5 ...3220703622 PB-416F W=16 0.08 MTR382 TAPE #92 W=16 3M AA 0 % ...5 ...3220704710 #92 W=16 3M 0.08 MTR3

445 PWB SD 0 FR-4 179*40*1.6 DAC-1 ...4 ...2994711503 PCB 1 PCE446 HEADER NY66 94V0 2PIN BN 0 % ...4 ...3070075000 CN2 SM02B-BHSS-1 1 PCE447

502 RES CH 1/10W 10K J 0603 .2 ...0343103300 RA44 ERJ-3GEYJ 103 1 PCE503 RES CH 1/10W 22 J 0603 .2 ...0343220300 RA1 2322 702 60229 1 PCE504

565 E-Q-0402-1550FET 30V 7A 28mohm SO-8PIN AA100 %.2...242601100223 ICA5 GF4412 1 PCE566 E-Q-0402-1550FET 30V 7A 28mohm SO-8PIN AB100 %.2...

634 RES CH 1/10W 1K J 0603 .2 ...0343102300 RM175 2322 702 60102 1 PCE635 RES CH 1/10W 1K J 0603 .2 ...0343102300 RM176 2322 702 60102 1 PCE

710 RES CH 1/10W 510 J 0603 .2 ...0343511300 RM26 2322 702 60511 1 PCE711 RES CH 1/10W 6.8K J 0603 .2 ...0343682300 RM2 2322 702 60682 1 PCE

758 E-C-0404-4869 CAP MC CP 50V .01U J X7R 0603 .2 ...1511454000 CM35 2238 586 15536 1 PCE759 E-C-0404-4878 CAP MC CP 50V 22P J C0G 0603 .2 ...

834 E-C-0404-4497 CAP MC CP 50V .1U Z Y5V 0603 .2 ...1517658000 CM161 2238 586 19812 1 PCE835 E-C-0404-4497 CAP MC CP 50V .1U Z Y5V 0603 .2 ...

Current Rating 4.0A3.2 LCD LCD Chi-Mei panel(TFT-MVA)Effective display size 357.12 (H) x 285.696 (V) mm (typ)18.0” / 46 cm diagonal Pixel number

910 E-C-0404-4864 CAP MC CP 10V 10U Z Y5V 1206 .2 ...15A7691200 CM188 C1206Y106Z010T 1 PCE911 E-C-0404-4864 CAP MC CP 10V 10U Z Y5V 1206 .2 ...

969 PML FOR SIQ125 ETC ..3 ...3520461000 1 PCE970 LABEL PAPER T:0.1MM LB-1206 ...4 ...3200106700 0.003 PCE971 EMBOSSED PLASTIC CHIP ...4 ...

1017 E-L-0407-1547CORE BEAD 100MHZ 80 OHM 3A080 .2 ...2921174612 LM29MLB-201209-0080P-N 1 PCE1018 E-L-0407-1547CORE BEAD 100MHZ 80 OHM 3A080 .2

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3.3.2.5 Connector PC99 requirement Audio in Lime Green pantone # 577C 3.3.2.6 Cable length 1.8 m 3.3.2.7 Audio DPMS Speakers stay on when

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