ViewSonic VLCDS23722-1W User manual

Service Manual
ViewSonic VE500-1
Model No. VLCDS23722-1W
(VE500-1_SM_526 - Rev. 1a – August 2002)
15” Color TFT LCD Display
ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

ViewSonic Corporation ii
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 8/28/02 Initial Reversion DCN-2208 K.Yang
Confidential – Do Not Copy VE500-1
1b11//05/02 Revise DCN-2208 C .Shen

TABLE OF CONTENTS
1. PRECAUTIONS AND NOTICES...............................................................................1
2. SPECIFICATIONS ....................................................................................................2
3. LOCATION OF CONTROLS.....................................................................................3
5.INTERNAL CONNECTOR PIN DEFINITION ............................................................5
6.BLOCK DIAGRAM....................................................................................................9
7.TROUBLE SHOOTING FLOW CHART.............................................................11
8.SPARE PARTS LIST ..............................................................................................15
9.EXPLODED DIAGRAM AND SPARE PARTS LIST...............................................18
Confidential – Do Not Copy VE500-1
ViewSonic Corporation iii
4.ADJUSTING PROCEDURE......................................................................................4
10.SCHEMATIC DIAGRAMS.......................................................................................19
11.PCB LAYOUT DIAGRAM.......................................................................................25

ViewSonic Corporation 1
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.
zRead all of these instructions.
zSave these instructions for later use.
zFollow all warnings and instructions marked on the product.
zDo not use this product near water.
zThis display should be installed on a solid horizontal base.
zWhen cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not spray
with liquid or aerosol cleaners.
zDo not expose this display to direct sunlight or heat. Hot air may cause damage to the cabinet
and other parts.
z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.
z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.
z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 muse not be blocked or
covered. The openings should never be blocked by placing the 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.
Confidential – Do Not Copy VE500-1

ViewSonic Corporation 2
2. SPECIFICATIONS
LCD panel type 15.0” TFT (15.0” Diagonal)
Displayable resolution XGA 1024 x 768 maximum
Pixel dimension 0.297 mm horizontal x 0.297 mm vertical
LCD display color 16.7M Colors Max.
OSD control AUTO CONFIG, BRIGHTNSS,
CONTRAST, COLOR (R, G, B, BLACK LEVEL ADJUST),
POSITION(H-POSITION, V-POSITION ),IMAGE (PHASE, CLOCK ),
MISC MENU (RESET,OSD POSITION, SYSTEM INFO )
Manual control buttons MENU, Select, Adjust(,), Power.
Viewing angle Horizontal: r60 , Vertical: -60~+40.
Tilt +20q, -5q.
Contrast ratio 350:1 (typ)
Brightness 250cd/m2(typ)
Response time 30ms (typ) tr+tf
Active display area 304.1 mm (H) x228.1mm (V)
AC/DC adapter Input: AC 100 ~ 240V, 50 ~ 60 Hz
Output: +12 V DC.
Input signal Video: Analog 0.7 Vp-p. 75 ohms
Sync. : TTL Level, Positive/ Negative, Separate Sync.
Input connector 15 Pin D-Sub.
Power management <2W in Active Off mode
Specification
Dimensions ( W x H x D ) 38.5 cm x 35.3 cm x 16.5 cm.
Weight 1850 kgs. (LCD Module only)
4.7kgs. (unit)
Accessory VGA cable, AC/DC adapter, power cord.
Temperature Operation : 0 ~ 40°C
Storage : -10 ~ 60°C
Confidential – Do Not Copy VE500-1

ViewSonic Corporation 3
3. LOCATION OF CONTROLS
1) MENU:
Enter to the OSD adjustment menu. It also used for go back to previous menu for sub-menu, and the
change data doesn’t be savedto memory.
2) SELECT:
To confirm the current selection. It also used for go back to previous menu for sub-menu, and the
change data will be savedto memory.
3) ADJUST : ( RIGHT )
To scroll up in sub menu or to increase value of selected item.
If pressed when menu is not active, BRIGHTNESS is adjusted.
4) ADJUST : ( LEFT )
To scroll down in sub menu or to decrease value of selected item
If pressed when menu is not active, AUTO CONFIG is adjusted.
5) POWER SWITCH
Press the power switch to turn the monitor on. Press it again to turn the monitor off.
6) POWER INDICATOR
The LED will light with green color in normal on state, and will
light with orange color in power saving mode.
Adjust ϰAdjust ϧSelect LED Power
Menu
Confidential – Do Not Copy VE500-1

ʳ
ʳ
1. As shown on Fig 1. Power off the monitor and unplug the DC cable. ʳʳ ʳ ʳ
2. As shown on Fig. 2 and Fig. 3. Press [2] key then plug DC cable at the same time. ʳʳ
3. As shown on Fig. 4, Fig. 5 and Fig. 6. The screen will show "Auto image " out after the LED light is changed to Green
4. As shown on Fig. 6. The All Reset procedure is finished after "Auto image Adjust" message disappears. ʳ
ʳʳ ʳʳʳ ʳʳʳ ʳ
ʳ
ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳ
ʳFig.1 Fig. 2 Fig. 3
ʳ
ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳ
ʳ
ʳFig. 4 ʳʳʳ Fig. 5 ʳFig. 6 ʳ
ʳ
ʳʳʳ ʳ
ʳ
ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳʳʳ ʳ
ʳFig.7 ʳʳ
4. ADJUSTING PROCEDURE
ViewSonic Corporation 4Confidential – Do Not Copy VE500-1

5.INTERNAL CONNECTOR PIN DEFINITION
XGA I/F BOARD (DPWBN5396T8----)
J2: Key Switch for OSD Adjustment, Power Switch and Brightness Control
Input Terminal
Connector P/N: VCNCP0906REJST-
Pin No. Symbol Function
1 UP S2 For OSD Adjustment
2 MENU AN
D
S1 For OSD Adjustment
3 LED-RED
4 LED-GRN
5 SOFT-START
6 GND
JP6: Output Terminal for Inverter Unit
Connector P/N: VCNCP0905REJST-
Pin No. Symbol Function
1 BKLT_ON Supply Voltage for Inverter unit (DC +5V)
2 BKLT_ON Supply Voltage for Inverter unit (DC +5V)
3 VCONT Voltage for Adjusting Backlight Brightness
4 GND
5Vin Su
pp
l
y
Volta
g
e for Inverter unit
(
DC +12
)
XGA I/F BOARD (DPWBN5396T8----)
J1: Signal Input Terminals
Connector P/N: QCNCD1175T8----
Pin No. Symbol Function
1 RED RED Video Input Signal
2 GREEN GREEN Video Input Signal
3 BLUE BLUE Video Input Signal
4NC
5 RETURN GND
6 RED RETURN GND for RED video signal
7 GREEN RETURN GND for GREEN video signal
8 BLUE RETURN GND for BLUE video signal
95V
10 SYNC. RETURN GND for Sync. signal
11 NC
12 DDC data
13 H SYNC. Horizontal Sync. Signal
14 V SYNC. Vertical Sync. Signal
15 DDC clock
ViewSonic Corporation 5Confidential – Do Not Copy VE500-1

CN3: Output Terminal for Connector board(DPWBN5349T8----)
Connector P/N:
Pin No. S
y
mbol Function
1 GND
2 RB2 RED Data Signal of Even Pixels
3 RB3 RED Data Signal of Even Pixels
4 RB4 RED Data Signal of Even Pixels
5 RB5 RED Data Signal of Even Pixels
6 RB6 RED Data Signal of Even Pixels
7 RB7 RED Data Signal of Even Pixels
8 GB2 GREEN Data Signal of Even Pixels
9 GB3 GREEN Data Signal of Even Pixels
10 GB4 GREEN Data Signal of Even Pixels
11 GB5 GREEN Data Signal of Even Pixels
12 GB6 GREEN Data Signal of Even Pixels
13 GB7 GREEN Data Signal of Even Pixels
14 BB2 BLUE Data Signal of Even Pixels
15 BB3 BLUE Data Signal of Even Pixels
16 BB4 BLUE Data Signal of Even Pixels
17 BB5 BLUE Data Signal of Even Pixels
18 BB6 BLUE Data Signal of Even Pixels
19 BB7 BLUE Data Si
g
nal of Even Pixels
ViewSonic Corporation 6Confidential – Do Not Copy VE500-1

Pin No. Symbol Function
20 GND
21 RA2 RED Data Signal of Odd Pixels
22 RA3 RED Data Signal of Odd Pixels
23 RA4 RED Data Signal of Odd Pixels
24 RA5 RED Data Signal of Odd Pixels
25 RA6 RED Data Signal of Odd Pixels
26 RA7 RED Data Signal of Odd Pixels
27 GA2 GREEN Data Signal of Odd Pixels
28 GA3 GREEN Data Signal of Odd Pixels
29 GA4 GREEN Data Signal of Odd Pixels
30 GA5 GREEN Data Signal of Odd Pixels
31 GA6 GREEN Data Signal of Odd Pixels
32 GA7 GREEN Data Signal of Odd Pixels
33 BA2 BLUE Data Signal of Odd Pixels
34 BA3 BLUE Data Signal of Odd Pixels
35 BA4 BLUE Data Signal of Odd Pixels
36 BA5 BLUE Data Signal of Odd Pixels
37 BA6 BLUE Data Signal of Odd Pixels
38 BA7 BLUE Data Signal of Odd Pixels
39 GND
40 DE Data Enable Signal
41 Vsync Vertical Sync. Signal
42 Hsync Horizontal Sync. Signal
43 GND
44 PCLK Clock Signal for Sampling Pixels Data Signals
45 PCLK Clock Signal for Sampling Pixels Data Signals
46 GND
47 VCC DC +5V Power Supply ( for LCD )
48 VCC DC +5V Power Supply ( for LCD )
49 VCC DC +5V Power Supply ( for LCD )
50 VCC DC +5V Power Su
pp
l
y(
for LCD
)
SW board (DPWBN5403T8----)
CN3 :Output Terminal for OSD, Power and Brightness control.
Used connector: VCNCP0906REJST-
Pin No. Symbol Function
1 UP S2 For OSD Adjustment
2 MENU AND DOWN S1 For OSD Adjustment
3 LED-RED
4 LED-GRN
5 SOFT-START
6 GND
ViewSonic Corporation 7Confidential – Do Not Copy VE500-1

Inverter(RUNTP5463T8----)
CN1: Inverter Input Terminal
1 Vin Supply Voltage for Inverter unit (DC +12)
2 GND
3 Dimmin
g
Dimming range(0.4~4v)
4 ON/OFF ON:5V OFF:0V
5 ON/OFF ON:5V OFF:0V
CN2, CN3:Output Terminal for LCD Panel Back-light
Pin No. S
y
mbol Function
1 High High Voltage for Backlight power sup
p
2 Low Low Volta
g
e for Backli
g
ht
p
ower su
pp
ViewSonic Corporation 8Confidential – Do Not Copy VE500-1

6.BLOCK DIAGRAM
J4
(DB15)
COMPUTER
GRAPHICS
DDC (U3)
EEPROM
24C21
U14
SD1010A
MPU
U5
MTV230V
U16
U10
PL
CN3
INTERFACE BOARD ( DPWBN5396T8---- )
JP6
TO
INVERTER
J3
SWITCH MODE
POWER
3.3V
5V
ADC
U1
AD9888
SCALER U15
EEPROM
24C08
X1
OS
FROM
A/D ADAPTOR
SW BOARD
DPWBN5403T8----
CN1
12V
15” LCD
PANEL
INVERTER
RUNTP5463T8----
CN1
C
N
2
C
N
3
C
O
N
ViewSonic Corporation 9Confidential – Do Not Copy VE500-1

cable pin definition
Switch board cable(QCNWS0906T8008-):28AWG, Shielding cable connection relationship
PHR-11 PHR-8
Pin No. Pin No.
12
22
33
45
55
66
Inverter cable(QCNWS0905T8005-):24AWG,Shielding cable connection relationship






PHR-5 PHR-5
Pin No. Pin No.
15
24
33
42
51










ViewSonic Corporation 10 Confidential – Do Not Copy VE500-1

7.TROUBLE SHOOTING FLOW CHART
YES
Does picture
display?
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
Check LCD Panel
Check SW board S1~S5 Check I/F board
Check OSD adjustment Check Sw board CN1
Check Inverter Check
I/F board
Check Inverter Check
backlight
Check connector board
Check I/F board
Check LCD panel
RGB signal
error
H,Vsyn
c error
Check power
LED
Hsync, Vsync
or DE error
NO
Back-light
on or off ?
on
A dark picture or a
picture full of
colored vertical
lines
off
Green
Check display
resolution
Orange
Check inverter
Check I/F board JP6
Check connector board
JP1,JP2
Check I/F board CN3
Check LCD panel CN1
Check I/F board
ViewSonic Corporation 11 Confidential – Do Not Copy VE500-1

CHK
U5 pin 33~36
(PUSH KEY SWITCH)
DPWBN5396T8---B
Debug Procedure
J3 , +12V
INPUT
Does the screen
Display?
Solution with
No display
(2)
NO
Display
ok ?
YES
Loss of
RGB??
Lost some
bits
of RGB??
YES
NO
YES
CHK
LP2 ~ LP3
CHK R7(R ),
R5(G),R3(B)
NO
YES NO
ViewSonic Corporation 12 Confidential – Do Not Copy VE500-1

NO
YES
YES
YES
CHK CKT
Sheet 4
(Power)
START
No screen
handle
(2)
Back-light
ok ?
5V or 3.3V
ok ?
NO
YES
NO
U14 pin
10,21,22,23
ok ?
CHK J1
NO
CHK
LP2 ~ LP13
ok ?
CHK U6
CHK U15
CHK CN3
CHK Panel
CHK U5 CKT
VCC/U5
YES
CHK
system power
NO
CHK U15
Pin 5,6
CHK U15
(if recall
function
is OK)
CHK CKT
Sheet 5
(Panel)
No screen
handler
(2)
NG
OK
LED always
ON or always
OFF when
power on ok ?
ViewSonic Corporation 13 Confidential – Do Not Copy VE500-1

J3,12V
INPUT CHK FUSE F1
CHK
U11 pin 2
+5V
CHK
U12 pin 2
3.3V
CHK
U13 pin 2
3.3V
CHK
1. L7
2. L8
3. Q4
4. U5
CHK
1. Q5
2. Panel
DPWBN5396T8---B
POWER FLOW
ViewSonic Corporation 14 Confidential – Do Not Copy VE500-1

8. VE500 SPARE PARTS LIST
NO. VIEWSONIC P/N DESCRIPTION PART NO. LOCATION
260045 E-C-0404-4885 CAPACITOR-C 39PF 50VDC M X7R VCICHN1HH330J-A
C30
,
80
,
99
,
100
260070 E-FS-0410-0099 FUSE 4A 125V QFS-Z402F-81UAA F
1
(4A/12
5V
)
260082 M-MS-0808-8001
CONVERTER
(VE500)
-
VSISC9884
-
110
-
D
(A/D CONVERTER SMARTASIC SC9884) VSISC9884-110-D U1
260085 M-MS-0808-8002
SCALLER
(VE500)
-
VSISD1010A
----
D
(SMARTASIC SD1010A-2) VSISD1010A----D U14
260089 M-MS-0808-8189
DC
-
DC
REGULATOR
U16
(VE500)
-
VSIRT9161-33CXA VSIRT9161-33CXA U16
260091 M-MS-0808-7995 REGULATOR (VE500)-VSIPQ1CY1032-PA VSIPQ1CY1032-PA U
11
414701 PL-PS-0715-0171 BASE GSTN-2865D8F
414702 M-MS-0808-7984 HINGE MHNGM0018D8
414703 M-MS-0808-7985 BASE PLATE LANGF2049D8
414704 M-MS-0808-8404 L20047 BASE PLATE/BASE *5 XESSD30P06000
414705 M-MS-0808-8406 BASE PLATE/HINGE *4 XBSSD40P12000
414706 L20008 RUBBER LEG GLEGG1460D8F
420004 B-SWB-0210-0040 SW BOARD DPWBN5403T8
420005 L20050 INVERTER LABEL TLABZ4916T8
420009 OSD CABLE QCNWS0906T8008
420701 C-FP-0301-0849 CAB-A GCABA2027D8F
420702 C-BC-0302-0402 CAB-B GCABB1730D8F
420703 L20008 KNOB JKNBP2121D8F
420704 LOGO PLATE GCOVD2390D8F
420705 C-BT-0304-0017 REAR COVER GCOVD2389D8F
420708 SHIELD CASE PSLDM6440D8
420709 SHIELD CASE PSLDM6441D8
420710 L20047 CAB-A/MAIN BRACKET*15 XEASD30P06000
420711 L20021 KEY BOARD/CAB-A*3 XEPSN26P06000
420712 L20047 CAB-A/CAB-B*2 XEPSD40P12000
420713
L20021
INVERTER*3
,
MAIN
BOARD*4
,
SHIELD*13, D-SUB METAL*2 XBMSD30P06000
420714 L20021 SHIELD*1 XBJSD30P04000
420715 L20021 XBMSD40P06000*4 XWVSD43-4F085
420716 MHNGM0018*4 XBMSD40P06000
420717 BOSS FOR VGA CONNECTOR LBOSM1069D8
420718 L20008 LENS HDECP1900D8F
420722 VS LOGO HBDGA1724D8
420723 DECORATION PLATE PISLV0204D8
420724 L20047 MYLAR FOR INVERTER PISL-1242D8
420725 L20047 MOVABLE BUSHING PGAD-1008D8
420726 L20047 KENSINGTON BRACKET LANGF2063D8
420727 L
2004
7
S
HIELD
CAS
E
(
M
A
IN B
OA
RD PSLDM6469D8
420728 L20047 FOR MAIN BRACKET SCREW PISLS1177D8
421000 ACER 15" PANEL CPWBVE500T8ACE
421001 L
200
75
AC
ER
1
5
"
P
A
NEL E
C
:-
9
VVLL150X2M-1-9
421002 B-SB-0221-0407 L
200
5
0
INVERTER RUNTP5463T8
421003 B-IF-0222-0024 L
20046
I
/
F B
OA
RD DPWBN5396T8---B
421004
CO
NNE
C
T
O
R B
OA
RD DPWBN5349T8
421005 FF
C
CA
BLE 5
0
PIN
(200
MM
)
QCODS1226T8
421006 INVERTER
CA
BLE QCNWS0905T8005
421007 L
20023
MYL
A
RPISL-1231D8---A
421701 L
A
N
G
F
204
7
*4
XBMSD30P10000
421702 M
A
IN BR
AC
KET LANGF2047D8
421703
CO
N B
OA
RD
*2
XBMSD26P06000
421704 L
200
5
0
F
O
R
CO
NNE
C
T
O
R B
OA
RD XWHSD32-05080
421705 L
20023
S
P
O
N
G
EPCUSS1262T8
ViewSonic Corporation Confidential – Do Not Copy VE500-1
15

8. VE500 SPARE PARTS LIST
NO. VIEWSONIC P/N DESCRIPTION PART NO. LOCATION
421706 L
20023
S
P
O
N
G
EPCUSS1263T8
421707 L
20023
F
O
R L
C
D
CA
BLE
CO
RE RCORA5054T8
430001 A-AD-0114-0142 AC/DC ADAPTER RUNTP5457T8
430002 MODEL LABEL TLAB-5398T8
430003 A-CD-VE500 USER'S MANUAL TINSE2803T8
430004 L20050 TC099 DOCUMENT TCAD-1277T8
430005 L20050 S/N LABEL FOR VE500 TLAB-5404T8
430006 A-VC-0101-0253 L20023 VGA CABLE 1.8M (VE500) QCODS1492T8D--A
430007 A-PC-0106-0180 AC POWER CORD (1.8M USA) QACC-1126D8D
430009 UPC LABEL TLABZ3903D8
430011 L20050 AC POWER CORD EU1.8M BLAC
K
QACC-1228T8D-F
430701 P-FM-0602-0730 EPS PAD SPAKA6458D8F
430702 P-BX-0601-0658 CARTON SPAKC3242D8
430703 SET BAG SSAKH1343D8-T
720707 D-SUB BRACKET LANGF2048D8
420B08 WHITE GLUE ZSLCN-TSE3843-W
420B10 GREEN GLUE ZADHSDNJ-LK
421B01
140
MM
*1
ZTAPEZ050C020
421B02
80
MM
*1
ZTAPEU050K030
421B03
43
MM
*1
ZTAPEY060W066U
ViewSonic Corporation Confidential – Do Not Copy VE500-1
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ViewSonic Corporation Confidential – Do Not Copy VE500-1
9.EXPLODED DIAGRAM
1 7