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
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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.
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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
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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
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ʳ
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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
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ʳFig.1 Fig. 2 Fig. 3
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ʳFig. 4 ʳʳʳ Fig. 5 ʳFig. 6 ʳ
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ʳFig.7 ʳʳ
4. ADJUSTING PROCEDURE
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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
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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
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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
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