ViewSonic VA930-1 VLCDS24020-1W User manual

Service Manual
ViewSonic VA930-1
(VA930-1_SM_584-Rev. 1.0-September 2002)
ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
Model No. VLCDS24020-1W
19” Color TFT LCD Display
3. LOCATION OF CONTROLS

Copyright
Copyright ¤2002 by ViewSonic Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular
purpose. 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.
Trademarks
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Revision History
Revision Date Description Of Changes Approval
1a 9/4/02 Initial Reversion DCN-2433 K.Yang
ViewSonic Corporation iConfidential – Do Not Copy VA930-1
1b11/05/02 Revise DCN-2433 C.Shen

TABLE OF CONTENTS
ViewSonic Corporation ii Confidential – Do Not Copy VA930-1
1. PRECAUTIONS AND NOTICES...............................................................................1
2. SPECIFICATIONS ....................................................................................................2
3. LOCATION OF CONTROLS.....................................................................................3
5. BLOCK DIAGRAM....................................................................................................9
6. TROUBLE SHOOTING FLOW CHART...................................................................11
7. SPARE PARTS LIST...............................................................................................15
8. EXPLODED DIAGRAM AND SPARE PARTS LIST................................................26
9.SCHEMATIC DIAGRAMS........................................................................................28
10.PCB LAYOUT DIAGRAM........................................................................................38
4.ADJUSTING PROCEDURE......................................................................................4

1. PRECAUTIONS AND NOTICES
Prior to using this manual, please ensure that you have carefully followed all the procedures outlined in
the user manual for this product.
Read all of these instructions.
Save these instructions for later use.
Follow all warnings and instructions marked on the product.
Do not use this product near water.
This display should be installed on a solid horizontal base.
When cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not spray with liquid or
aerosol cleaners.
Do not expose this display to direct sunlight or heat. Hot air may cause damage to the cabinet and other
parts.
Adequate ventilation must be maintained to ensure reliable and continued operation and to protect the
display from overheating. Do not block ventilation slots and openings with objects or install the display
in a place where ventilation may be hindered.
Do not install this display near a motor or transformer where strong magnetism is generated. Images
on the display will become distorted and the color irregular.
Do not allow metal pieces or objects of any kind fall into the display from ventilation holes.
Slots and openings in the cabinet and the back or bottom are provided for ventilation, to ensure reliable
operation of the product and to protect it from overheating, those openings must not be blocked or
covered. Those openings should never be blocked by placing this product on a bed, sofa, rug, or other
similar surface. 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.
ViewSonic Corporation 1Confidential – Do Not Copy VA930-1

2. SPECIFICATIONS
1. Specifications
LCD panel type 19.0”TFT(Fujitsu)
Power Consumption 48 W (typ)
Displayable Resolution SXGA 1280 x 1024 maximum
Pixel dimension 0.294 mm x 0.294 mm
Display Color 16.7 M
Viewing Angle
(CR=10)
Horizontal: ±85q
Vertical: ±85q
Response Time 25 ms typ.
Contrast Ratio 500:1 typ.
Brightness 250 cd / m2typ.
Active Display Area 376 mm horizontal x 301mm vertical
AC/DC adapter Input:AC 100~264V,47~63 Hz
Output:+12V DC.
Dimensions ( WxHxD ) 439 mm(W) x 465mm(H) x 180mm(D)
Weight 7.5 kg (unit)
Input connector 15 Pin D-Sub.
Power management YES
Temperature
Operating : 0°C ~ +40°C
Storage : -20°C ~ +60°C
ViewSonic Corporation 2Confidential – Do Not Copy VA930-1

3. LOCATION OF CONTROLS
3. LOCATION OF CONTROLS
ViewSonic Corporation 3Confidential – Do Not Copy VA930-1

The " adjusting procedure" of VA930 model
1. Turn off the display by power button key on the front of bezel,
2. Disconnect the DC power cable from power jack at rear side.
3. Press and hold the “Ÿ” button key on the front of the bezel
4. Connect the power cable with power jack, and keep pressing the “Ÿ” button key.
5. Press the power button key to turn the display on, and then release the “Ÿ” and power button.
6. The unit is set into Reset mode, OSD main window will be shown on the display,
you can see a red message for “ALL RESET” with a red frame inside OSD windows.
7. The LED lightsup with orange and change to green color during reset procedure.
8. OSD changesinto a message for "Auto Image Adjust", it disappearsafter reset procedure.
9. After that the input video signal is showed on display.
4. ADJUSTING PROCEDURE
ViewSonic Corporation 4Confidential – Do Not Copy VA930-1

5.BLOCK DIAGRAM
FROM
A/D ADAPTOR
INTERFACE BOARD(DPWBN5419T8---A)
COMPUTER
GRAPHIC
12V
3.3V
5V
W1
(DB15)
A/D
CONVERTER
AD9883
(U3)
SCALER
SD1210-2
(U8)
DDC
EPROM
24C21A
(U5)
Serial
EEPROM
24C16
(U17)
MPU
(U15)
MTV230P
Serial
EEPROM
24C16
(U9) JP2
TO
INVERTER
JP3 SWITCH MODE
POWER SUPPLY
19” LCD
PANEL
SW BOARD
DPWBN5418T8----
INVERTER
RUNTP5392T8----
CON1
CON4
5CON CON2
CON3
JP7
X1
OSC PLL
U12
AUDIO BOARD
DPWBN5417T8----
ViewSonic Corporation 5Confidential – Do Not Copy VA930-1

YES
NO
ON
OFF
GREEN
Hsync,Vsync
Or DE error
ORANGE
OSD no response
Picture dim
The brightness is
different between upper
and lower side of panel
Picture without color
Vertical, Horizontal
Out of sync
One or more colored
vertical lines
Even (or odd) vertical
line is dark
Does
picture
display
Back-light
On or off?
A
dark picture
full of
colored
vertical lines
Check
power
LED
Check display
resolution Check inverter
Check I/F board JP1
Check LCD cable
Check I/F board JP4
Check LCD panel
J1,J2,J3
Check I/F board
Check SW board S1~S4
Check OSD adjustment
Check inverter
Check backlight
Check signal cable
Check I/F board
Check LCD panel
Check LCD panel
Check I/F board
Check SW board
J1
Check inverter
Check I/F board
RGB signal
error
H,V sync
error
or a picture
6.TROUBLE SHOOTING FLOW CHART
ViewSonic Corporation 6Confidential – Do Not Copy VA930-1

YES
YES
YES
NO
CHECK 5V,3.3VB,
LCD_VCC & 3V3_MCU
START
POWER CKT
(12V,+5V & 3.3V CKT)
POWER CKT
CHECK POWER CKT
END
ViewSonic Corporation 7Confidential – Do Not Copy VA930-1

YES
YES
NO
NO
OK
YES
SIGNAL
Check U3 O/P TO SD1210 CKT
ADC CKT
CHECK I/P R,G & B Video,
HSYNC(pin 30),Coast(pin 31) AND
I2C BUS Signal
START
CHECK MCU CKT(I2C
BUS),D_SUB connector
And U2(74LV14)
ADC CKT
REPLACE U3
& VCLK00
ViewSonic Corporation 8Confidential – Do Not Copy VA930-1

YES
NO
NO
YES
YES
OK
MCU CKT START
MCU CKT
CHECK U15 RESET(pin
19),12MHZ(Pin7,8),H_sync
(pin 14)&V_sync(pin13)
SIGNAL
CHECK MCU_I2C(pin
31;32),ROM I2C(pin
27;28),ASIC I2C(pin
25;26) AND OUTPUT
SIGNAL
END
CHECK U15 F/W
OR REPLACE
ViewSonic Corporation 9Confidential – Do Not Copy VA930-1

YES
YES
OK YES
NO
YES
NO
OK
OSD CKT
END
CHECK U11
OSD_CLK(Pin6),U8 OSD_HS
(Pin31),OSD_VS(Pin 32)
SIGNAL
CHECK U15
FBLK(Pin42),OSD_B(Pin 43)
,OSD_G(Pin44) And OSD_R
(Pin 1) SIGNAL
START
OSD CKT
CHECK U8
FBLK(Pin23),OSD_B(Pin 22)
,OSD_G(Pin21) And
OSD_R(Pin 20)
REPLACE U15 REPLACE U8
ViewSonic Corporation 11Confidential – Do Not Copy VA930-1

YES
YES
NO
NO
YES
YES
OK
PLL1 CKT
CHECK U11 FCLK1(Pin 1)
and 2 PLL1_H(Pin 2)
SIGNAL
CHECK U11 PIN 6 CLOCK
AND PIN 8 HALF_CLOCK
SIGNAL
START
END
CHECK U8 FCLK1(Pin
29),VCLK1(Pin 30)
SIGNAL
PLL1 CKT
REPLACE
U11
ViewSonic Corporation 12 Confidential – Do Not Copy VA930-1

YES
YES
NO
YES
START
CHECK LCD_VCC,V+3.3V,
+5.0V,+12V AND Audio 9.0V
END
CHECK POWER CKT
(+5V,+12V, 3.3V&
Audio 9.0V CKT)
PANEL POWER CKT
PANEL POWER CKT
ViewSonic Corporation 13 Confidential – Do Not Copy VA930-1

YES
NO
YES
NO YES
NO
YES
NO
YES
AUDIO
CKT
CHECK OSD setting
(Mute,Volume)
START
CHECK U22
O/P SIGNAL
Adjust OSD
CHECK U23 (R117,118) O/P
SIGNAL
CHECK SCL,SDA
SIGNAL
Wire
connection
Replace U23
Replace U22
Speaker
connection
AUDIO CKT
ViewSonic Corporation 14 Confidential – Do Not Copy VA930-1

7.SPARE PARTS LIST
ViewSonic Corporation 15Confidential – Do Not Copy VA930-1
LOCATION VIEWSONIC P/N PARTS NO DESCRIPTION
BASE PL-PS-0715-0168 GSTN-2875D8F--- BASE
BASE FRONT COVER M-CV-0830-2336 GSTN-2876D8F--- BASE FRONT COVER
BASE-BACK COVER M-CV-0830-2337 GSTN-2877D8F--- BASE-BACK COVER
BASE METAL M-MS-0808-8259 LANG-2051D8---- BASE METAL
BASE SUPPORT M-MS-0808-8260 LANG-2052D8---- BASE SUPPORT
CUSHION-A P-FM-0602-0776 PCUSG1581D8---A CUSHION
CUSHION-B P-FM-0602-0777 PCUSG1582D8---- CUSHION
CUSHION-C P-FM-0602-0778 PCUSG1583D8---- CUSHION
CUSHION-D P-FM-0602-0796 PCUSG1584D8---A CUSHION
HINGE ASSEMBLY M-MS-0808-8265 MHNGM0031D8---- HINGE ASSEMBLY
HIGH VOLTAGE LABEL TLABZ3978D8---- HIGH VOLTAGE LABEL
SPEAKER E-SK-0412-0054 RSPKCL015D84FG- SPEAKER
CAB-A C-FP-0301-0894 GCABA2104D8F--- CAB-A
CAB-B M-CV-0830-2342 GCABB1769D8F--- CAB-B
KNOB PL-NB-0707-0175 JKNBP2311D8F--- KNOB
LENS M-MS-0808-8257 HDECP1937D8F--- LENS
KNOB-COVER M-CV-0830-2335 GMSKP1325D8F--- KNOB-COVER
BACK COVER GC0VD2442D8F--- BACK COVER
VE-LOGO M-LB-0813-0710 HBDG-1278D8F--- VE-LOGO
VESA METAL M-MS-0808-8264 LANGN1714D8---- VESA METAL
D-SUB METAL M-MS-0808-8258 LANG-2050D8---- D-SUB METAL
HINGE SUPPORT M-MS-0808-8263 LANGH0029D8---- HINGE SUPPORT
VESA GUM M-MS-0808-8266 PGUM-1105D8---- VESA GUM
VIEWSONIC TEXT H1NDA1259D8---- VIEWSONIC TEXT LOGO
LOGO PLATE (BIRDS
MARK
)
M-MS-0808-6478 HBDGA1724D8---- LOGO PLATE (BIRDS
MARK
)
BASE*4 XBSSN40P08000-- 4
¢
8mm BASE*4
BASE SUPPORT*7 XBSSN40P08000-- 4
¢
8mm BASE SUPPORT*7
BASE FRONT COVER*4 XBPSN30P08000-- 3
¢
8mm BASEFRONT
SPEAKER*4 XEPSD30P12WS0-- 3
¢
12mm SPEAKER*4
FOR CAB-A'k2 XBJSD30P10000-- 3
¢
10mm CAB-A*2
CAB-A*l XEPSD30P12000-- 3
¢
12mm CAB-A*1
FOR CAB-B*5 XBMSD30P08000-- 3
¢
8mm CAB-B*5
FOR SW BOARD*4 XEPSD30P08000-- 3
¢
8mm SW BOARD*5
D-SUB*3 XBSSD30P04000-A 3
¢
4mm D-SUB*3
HINGE SUPPORT*6
(
120de
g)
XBSSD30P04000-A 3¢ 4mm HINGE
SUPPORT*6
HINGE SUPPORT XBPSN40P12JS0-- 4
¢
12mm HINGE
FOR D-SUB*5 XBJSD30P04000-- 3
¢
4mm D-SUB*5
HINGE SUPPORT*2 XBPSN40P10JS0-- 4
¢
10m HINGE SUPPORT*2
BOSS FPR SUB LB0SM1069D8---- BOSS FPR SUB
KENSINGTON BRACKET M-MS-0808-8261 LANGF2063D8---A KENSINGTON BRACKET
DECORATION PLATE P1SLV0218D8---- DECORATION PLATE
EVA FOR VESA METAL PCUSS1391D8---- EVA FOR VESA METAL
SPEAKER SCREW
RUBBER PCUSG1609D8---- SPEAKER SCREW RUBBER
EVA FOR HINGE PCUSS1392D8---- EVA FOR HINGE SUPPORT
FUJITSU PANEL
(
19"
)
CPWB-5419T8FUSA FUJITSU PANEL
(
19"
)
CONTROL BOARD B-SWB-0210-0042 DPWBN5418T8---- CONTROL BOARD ASS'Y
AUDIO BOARD ASS'Y B-AC-0215-0034 DPWBN5417T8---- AUDIO BOARD ASS'Y
AC ADAPTOR
(
VSC A-AD-0114-0155 RUNTP5511T8---- AC ADAPTOR
(
VSC 12V/5A
)
MODEL LABEL TLABM4280D8T--- MODEL LABEL
USER'S MANUAL T1NSE2903D8---- USER'S MANUAL
INF FILE DEVICE A-CD-VA930 DDSKC0023D8---- INF FILE DEVICE
SIGNAL CABLE QC0DS1584D8D--- SIGNAL CABLE
AC POWER CORD A-PC-0106-0180 QACC-1126D8D--- AC POWER CORD
UPC LABEL M-LB-0813-0527 TLABZ3903D8---- UPC LABEL
SPARE PARTS LIST

ViewSonic Corporation 16Confidential – Do Not Copy VA930-1
COLOR KEY M-MS-0808-6545 TCAD-1222D8---- COLOR KEY
AUDIO CABLE QC0DK0030D8D--- AUDIO CABLE
POWER CORD(EU 1.8M
BLACK
)
A-PC-0106-0181 QACC-1228T8D-F- POWER CORD(EU 1.8M
BLACK
)
TC099 CARD TCAD-1277T8---- TC099 CARD
SIN LABEL TLAB-5373T8---- SIN LABEL
PACKING P-FM-0602-0797 SPAKA6468D8---A PACKING
CARTON SPAKC3325D8---A CARTON
BAG SSAKH1356D8-T-A BAG
PALLET SPAKW1135D8---A PALLET
CONNER PAPER M-MS-0808-5875 SPAKK1703T8Z--- CONNER PAPER
CONNER PAPER SPAKK6273D8---- CONNER PAPER
SW WIRE M-WR-0828-0653 QCNWS0908-8016- SW WIRE
AUDIO WIRE M-WR-0828-0652 QCNWS0907-8015- AUDIO WIRE
SPEAKER WIRE M-WR-0828-0650 QCNWS0904-8030- SPEAKER WIRE
ASSEMBLY CPWB-5419T8FUSA
FUSITSU PANEL
(
19"
)
M-LCD-0826-0136 VVLFLC48SXC8V-- FUSITSU PANEL
(
19"
)
M/B BOARD ASS'Y B-MB-0201-0697 DPWBN5419T8---A M/B BOARD ASS'Y
FUSITSU PANEL
(
19"
)
B-SB-0221-0463 RUNTP5523T8---- FUSITSU PANEL
(
19"
)
MAIN METAL M-MS-0808-8262 LANGF2068D8---- MAIN METAL
M/B SHIELD M-MS-0808-8267 PSLDM6477D8---- M/B SHIELD
INVERTER SHIELD PSLDM6478D8---- INVERTER SHIELD
INVERTER SHIELD PSLDM6478D8---A INVERTER SHIELD
INVERTER MYLER P1SL-1250DS---- INVERTER MYLER
INVERTER MYLAR P1SL-1250D8---A INVERTER MYLAR
INVERTER SHIELD P1SL-1256D8---- INVERTER SHIELD MYLER
INVERTER SHIELD P1SL-1256D8---A INVERTER SHIELD MYLAR
FOR LCD PANEL XBJSD30P10000-- FOR LCD PANEL
FOR INV*4 XH1SD30P06000-- 3
¢
6mm INV*4
M/B*5 XH1SD30P06000-- 3
¢
6mm M/B*5
AU*4 XH1SD30P06000-- 3
¢
6m .1U*4
SHIELD-19 XH1SD30P06000-- 3
¢
6mm SHIELD*9
INV*5 XH1SD30P06000-- 3
¢
6mm INV*5
PANEL WIRE HOLDER LHLDW1145D8---- PANEL WIRE HOLDER
PANEL WIRE QC0DS1576D8---- PANEL WIRE
INVERTER WIRE M-WR-0828-0651 QCNWS0906-8022- INVERTER WIRE
LOCATION VIEWSONIC P/N PARTS NO DESCRIPTION
I/F BOARD QPWB-5419T8---C I/F BOARD
C1 VCLFHN1HG104Z-A C .1U Z 50V
C2 VCLFHN1HG104Z-A C .1U Z 50V
C3 VCLFHN1HG104Z-A C .1U Z 50V
C4 VCLFHN1HG104Z-A C .1U Z 50V
C8 VCLFHN1HG104Z-A C .1U Z 50V
C9 VCLFHN1HG104Z-A C .1U Z 50V
C10 VCLFHN1HG104Z-A C .1U Z 50V
C11 VCLFHN1HG104Z-A C .1U Z 50V
C12 VCLFHN1HG104Z-A C .1U Z 50V
C13 VCLFHN1HG104Z-A C .1U Z 50V
C14 VCLFHN1HG104Z-A C .1U Z 50V
C19
(
10UF/16V
)
VCEABN1CX106M-A E 10U M 16V
C19 2nd SOURCE VCEABN1CX106MNA E 10U M 16V 2nd
C20 VCLFHN1HG104Z-A C .1U Z 50V
C21 VCLFHNlHG104Z-A C .1U Z 50V
C22 VCEABN1CX107M-A E 100U M 16V
C22 2nd SOURCE VCEABN1CX107MNA E 100U M 16V 2nd
C27 VCLFHN1HG104Z-A C .1U Z 50V
C28 VCEABN1CX107M-A E 100U M 16V
C28 2nd SOURCE VCEABN1CX107MNA E 100U M 16V 2nd

ViewSonic Corporation 17Confidential – Do Not Copy VA930-1
C29 VCLFHN1HG104Z-A C .1U Z 50V
C30 VCLFHN1HG473Z-A C .047U Z 50V
C31 VCICHN1HB150J-A C 15U J 50V
C31 2nd SOURCE VCLFHN1HG150J-A C 15U J 50V 2nd
C33 VCLFHN1HG473Z-A C .047U Z 50V
C34 VCICHN1HB150J-A C 15U J 50V
C34 2nd SOURCE VCICHN1HH150K-A C 15U K 50V 2nd
C34 2nd SOURCE VCLFHN1HG150J-A C 15U J 50V 2nd
C35 VCLFHN1HG473Z-A C .047U Z 50V
C36 VCICHN1HB150J-A C 15U J 50V
C36 2nd SOURCE VCICHN1HH150K-A C 15U K 50V 2nd
C36 2nd SOURCE VCLFHN1HG150J-A C 15U J 50V 2nd
C37 E-C-0404-4885 VCICHN1HH330J-A C 33 J 50V
C38 VCLFHN1HG104Z-A C .1U Z 50V
C39 VCICHN1HG393M-A C .0390 M 50V
C40 VCICHN1HH470J-A C 47U J 50V
C40 2nd SOURCE VCLFHN1HG470K-A C 47U K 50V 2nd
C41 VCIRHN1HG392M-A C 3900P M 50V
C42 VCLFHN1HG104Z-A C .1U Z 50V
C43 VCLFHN1HG104Z-A C .1U Z 50V
C44 VCLFHN1HG100J-A C 10U J 50V
C45 E-C-0404-4885 VCICHN1HH330J-A C 33 J 50V
C47 VCICHN1HH470J-A C 47U J 50V
C47 2nd SOURCE VCLFHN1HG470K-A C 47U K 50V 2nd
C48 VCLFHN1HG104Z-A C .1U Z 50V
C49 VCICHN1HG102K-A C 1000P K 50V
C62 E-C-0404-4885 VCICHN1HH330J-A C 33 J 50V
C63 E-C-0404-4885 VCICHN1HH330J-A C 33 J 50V
C70 VCEABN1CX107M-A E 100U M 16V
C70 2nd SOURCE VCEABN1CX107MNA E 100U M 16V 2nd
C71 E-C-0404-4885 VCICHN1HH330J-A C 33 J 50V
C72 VCIRHN1HG392M-A C 3900P M 50V
C73 VCLFHN1HG104Z-A C .1U Z 50V
C74 VCICHN1HH470J-A C 47U J 50V
C74 2nd SOURCE VCLFHN1HG470K-A C 47U K 50V 2nd
C75 VCEABN1CX107M-A E 100U M 16V
C75 2nd SOURCE VCEABN1CX107MNA E 100U M 16V 2nd
C76 VCLFHN1HG104Z-A C .1U Z 50V
C77 VCLFHN1HG104Z-A C .1U Z 50V
C78 VCLFHN1HG104Z-A C .1U Z 50V
C79 VCLFHN1HG104Z-A C .1U Z 50V
C80 VCLFHN1HG104Z-A C .1U Z 50V
C81 VCLFHN1HG104Z-A C .1U Z 50V
C82 VCLFHN1HG104Z-A C .1U Z 50V
C83 VCLFHN1HG104Z-A C .1U Z 50V
C84 VCLFHN1HG104Z-A C .1U Z 50V
C85 VCLFHN1HG104Z-A C .1U Z 50V
C86 VCLFHN1HG104Z-A C .1U Z 50V
C87 VCLFHN1HG104Z-A C .1U Z 50V
C88 VCLFHN1HG104Z-A C .1U Z 50V
C89 VCLFHN1HG104Z-A C .1U Z 56
C92 VCLFHN1HG104Z-A C .1U Z 50V
C95 VCIRHN1HG103K-A C .01U K 50V
C96 VCLFHN1HG104Z-A C .1U Z 50V
C98 VCLFHN1HG104Z-A C .1U Z 50V
C99 VCEABN1CX107M-A E 100U M 16V
C99 2nd SOURCE VCEABN1CX107MNA E 100U M 16V 2nd
C100 VCEABN1CX226M-A E 22U M 16V
C101 VCLFHN1HG104Z-A C .1U Z 50V