ViewSonic VP2330WB - 23" LCD Monitor User manual

ViewSonic VP2330wb-1
Model No. VS10813-1W
23” Color TFT LCD Display
(VP2330wb_SM Rev. 1a Feb. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA –[phone]
Service Manual

ViewSonic Corporation Confidential -Do Not Copy VP2330wb
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Copyright
Copyright © 2005 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
Optiquest is a registered trademark of ViewSonic Corporation.
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
SM Editing Date ECR Number Description of Changes Editor
1a 02/16/2006 Initial Release Jamie Chang

ViewSonic Corporation Confidential -Do Not Copy VP2330wb
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TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 4
3. Front Panel Function Control Description 9
4. Circuit Description 12
5. Adjustment Procedure 28
6. Troubleshooting Flow Chart 46
7. Recommended Spare Parts List 53
8. Exploded Diagram and Exploded Parts List 56
9. Block Diagram 60
10. Schematic Diagrams 61
11. PCB Layout Diagrams 65

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1. Precautions and Safety Notices
1. Caution :
No modification of any circuit should be attempted . Service work should only be performed after you are
thoroughly familiar with all of the following safety checks and servicing guide line
2. Safety Check :
Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit.
These voltage are exposed in such areas as the associated transformer circuits .
3. POWER SUPPLY REQUIREMENTS
The external power converter for this display utilizes AC and DC cords , AC cord is detachable , but DC cord is
permanently attached . Any attempt to replace another adapter could result in serious problem on the display .
4. LEAKAGE CURRENT HOT CHECK
4-1 Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during this check.
4-2 Connect a 1500 ohm , 10 watt resistor , paralleled by a 0.15uF capacitor between each metallic part and
a good earth ground
4-3 Use an AC voltmeter with 1000 ohm / volt or more sensitivity and measure the AC voltage across the
combination 1500 ohm resistor and 0.15uF capacitor.
4-4 Move the resistor connection to each exposed metallic part and measure the voltage.
4-5 Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement.
4-6 Voltage measured must not exceed 1.5 volt RMS, from any exposed metallic part to the ground. A
leakage current tester may be used in the above hot check, in which case any circuit measured must not
exceed 1.0 milliamp. In the case of a measurement exceeding the 1.0 milliamp value, a rework is
required to eliminate the chance of a shock hazard .
To Metal Parts
V
AC VOLTMETER
1500 10W
0.15u
.
Earth Ground

VP20”/21”/23”W series handling Notice
Correct Method Incorrect method
Correct Method Incorrect method
Correct Method Incorrect method
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Correct Method Incorrect method
Correct Method Incorrect method
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2. Specification
GENERAL specification
Test Resolution & Frequency 1920x1200 @ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls Factory Default:
Contrast = 70%, Brightness = 100%
VIDEO INTERFACE
Input Connector (refer the appendix A) D-Sub-1 = DB-15 (Analog)
DVI-A = DVI-I (Analog)
DVI-D = DVI-I (Digital)
Default Input Connector Defaults to the first detected input
Video Cable Strain Relief Equal to twice the weight of the monitor for five
minutes
Video Cable Connector DB-15 Pin out Compliant DDC/CI
Video RGB (Analog)
Separate Sync / Composite Sync / SOG
Video Signals
TMDS (Digital)
Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)
Maximum PC Video Signal 950 mV with no damage to monitor
Maximum Mac Video Signal 1250 mV with no damage to monitor
Sync Signals TTL
DDC/CI Compliant with Revision 1.0
Sync Compatibility Separate Sync / Composite Sync / SOG
Video Compatibility Shall be compatible with all PC type computers,
Macintosh computers, and after market video cards
Resolution Compatibility
640 x 350, 640 x 400, 640 x 480, 640 x 870, 720 x 400,
720 x 480, 720 x 576, 800 x 600, 832 x 624, 1024 x
768, 1152 x 864, 1152 x 870, 1280 x 720, 1280 x 768,
1280 x 960, 1280 x 1024, 1360 x 768, 1400 x 1050,
1440 x 900, 1600 x 1200, 1680 x 1050, 1920 x 1080,
1920 x 1200
Exclusions Not compatible with interlaced video

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USB INTERFACE
Up Stream Connector B type USB port x1
Down Stream Connector A type USB port x4
Compatibility Compliant with Revision 2.0
Power The hub gets power from the display.
POWER SUPPLY
Internal Power Supply Delta ADP-120UB B
Input Voltage Range 90 to 264 VAC
Input Frequency Range 47.5 to 63 Hertz
Short Circuit Protection Output can be shorted without damage
Over Current Protection 5.0 A typical at 12.0 VDC
Leakage Current 3.5mA (Max) at 254VAC / 60Hz
Efficiency 80 % typical at 115VAC Full Load
Fuse Internal and not user replaceable
Power Dissipation TBD Watts (typ)
Max Input AC Current 1.5 Arms @ 90VAC, 0.75 Arms @180VAC
Inrush Current (Cold Start) 50 A (max) @ 115VAC
90 A (max) @ 230VAC
Power Supply Cold Start Shall start and function properly when under full load, with all combinations of input voltage, input
frequency, and operating temperature.
Power Supply Transient Immunity Shall be able to withstand an ANSI/IEEE C62.41-1980 6000V 200 ampere ring wave
transient test with no damage.
Power Supply Line Surge Immunity Shall be able to withstand 1.5 times nominal line
voltage for one cycle with no damage.
Power Supply Missing Cycle Immunity Shall be able to function properly, without reset or visible screen artifacts,
when ½ cycle of AC power
is randomly missing at nominal input.
Power Supply Acoustics
The power supply shall not produce audible noise
that would be detectable by the user. Audible
shall defined to be in compliance with ISO 7779
(DIN EN27779:1991) Noise measurements of
machines acoustics. Power Switch noise shall not
be considered.
Power Saving Operation(Method) VESA DPMS Signaling
On Mode < 81 W (Typ) / 85 W (max)
Power Consumption Active Off < 4W
Recovery Time On Mode = N/A, Active Off < 3 sec

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ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency 24 –92 kHz
Vertical Refresh Rate 50 –85* Hz.
Maximum Pixel Clock 165 MHz
Sync Polarity Independent of sync polarity.
Timing Table Analog
Item
Timing
Separated
Composite
SOG
Digital -
TMDS
Remark
1640 x 350 @
70
Hz,
31.5 KHz




2640 x 350 @
85
Hz,
37.9 KHz



For Separated sync, Only horizontal full
screen, The vertical position is at the center.
3640 x 400 @
60
Hz,
31.5 KHz




For SOG sync, switch 640x400@60Hz and
640x480@60Hz by [1]+[2] short cut key
(primary = 640x480@60Hz)
4640 x 400 @
70
Hz,
31.5 KHz




For Separated Sync, Switch 640x400@70Hz
and 720x400@70Hz by [1]+[2] short cut key
(primary = 640x400@70Hz)
5640 x 400 @
85
Hz,
37.9 KHz




For Separated Sync, Switch 640x400@85Hz
and 720x400@85Hz by [1]+[2] short cut key
(primary = 640x400@85Hz)
6640 x 480 @
50
Hz,
24.7 KHz



7640 x 480 @
60
Hz,
31.5 KHz




For SOG sync, switch 640x400@60Hz and
640x480@60Hz by [1]+[2] short cut key
(primary = 640x480@60Hz)
8640 x 480 @
67
Hz,
35 KHz




9640 x 480 @
72
Hz,
37.9 KHz




10 640 x 480 @
75
Hz,
37.5 KHz




11 640 x 480 @
85
Hz,
43.3 KHz




12 720 x 400 @
70
Hz,
31.5 KHz




13 720 x 400 @
85
Hz,
37.9 KHz




For Separated Sync, Switch 640x400@85Hz
and 720x400@85Hz by [1]+[2] short cut key
(primary = 640x400@85Hz)
14 720 x 480 @
60
Hz,
31.5 KHz


15 720 x 576 @
50
Hz,
31.3 KHz


16 800 x 600 @
50
Hz,
24.7 KHz




17 800 x 600 @
56
Hz,
35.1 KHz




18 800 x 600 @
60
Hz,
37.9 KHz




19 800 x 600 @
72
Hz,
48.1 KHz




20 800 x 600 @
75
Hz,
46.9 KHz




21 800 x 600 @
85
Hz,
53.7 KHz




22 832 x 624 @
75
Hz,
49.7 KHz




23 1024 x 768 @
50
Hz,
39.6 KHz




For Separated and Composite sync, Switch
1024x768@50Hz and 1280x768@50Hz by
[1]+[2] short cut key (primery =
1024x768@50Hz)
24 1024 x 768 @
60
Hz,
48.4 KHz




25 1024 x 768 @
70
Hz,
56.5 KHz




26 1024 x 768 @
72
Hz,
58.1 KHz




27 1024 x 768 @
75
Hz,
60 KHz





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28 1024 x 768 @
75
Hz,
60.2 KHz




29 1024 x 768 @
85
Hz,
68.7 KHz




30 1152 x 864 @
75
Hz,
67.5 KHz




31 1152 x 870 @
75
Hz,
68.7 KHz




32 1280 x 720 @
50
Hz,
37.5 KHz


33 1280 x 720 @
60
Hz,
45 KHz


34 1280 x 768 @
50
Hz,
39.6 KHz




For Separated and Composite sync, Switch
1024x768@50Hz and 1280x768@50Hz by
[1]+[2] short cut key (primary =
1024x768@50Hz)
35 1280 x 768 @
60
Hz,
47.4 KHz



For analog sync, Switch 1280x768@60Hz
and 1360x768@60Hz by [1]+[2] short cut key
(primary = 1280x768@60Hz)
36 1280 x 768 @
60
Hz,
47.8 KHz



37 1280 x 768 @
75
Hz,
60.3 KHz




38 1280 x 768 @
85
Hz,
68.6 KHz




39 1280 x 960 @
50
Hz,
49.4 KHz




40 1280 x 960 @
60
Hz,
59.7 KHz




41 1280 x 960 @
75
Hz,
75.2 KHz




42 1280 x 960 @
85
Hz,
85.9 KHz




43 1280 x 1024
@
50
Hz,
52.7 KHz




44 1280 x 1024
@
60
Hz,
64 KHz




45 1280 x 1024
@
75
Hz,
80 KHz




46 1280 x 1024
@
85
Hz,
91.1 KHz




47 1360 x 768 @
60
Hz,
47.7 KHz




For analog sync, Switch 1280x768@60Hz
and 1360x768@60Hz by [1]+[2] short cut key
(primary = 1280x768@60Hz)
48 1400 x 1050
@
50
Hz,
54.1 KHz




49 1400 x 1050
@
60
Hz,
64.7 KHz



For analog sync, Switch 1400x1050@60Hz
and 1680x1050@60Hz by [1]+[2] short cut
key (primary = 1400x1050@60Hz)
50 1400 x 1050
@
60
Hz,
65.3 KHz


For Separated and Composite sync, Switch
1400x1050@60Hz and 1680x1050@60Hz
by [1]+[2] short cut key (primary =
1400x1050@60Hz)
51 1400 x 1050
@
75
Hz,
82.3 KHz




52 1440 x 900 @
60
Hz,
55.5 KHz




53 1440 x 900 @
60
Hz,
59.9 KHz




54 1440 x 900 @
75
Hz,
75 KHz




55 1440 x 900 @
85
Hz,
84.8 KHz




56 1600 x 1200
@
50
Hz,
61.8 KHz




57 1600 x 1200
@
60
Hz,
75 KHz




58 1680 x 1050
@
60
Hz,
64.7 KHz



For analog sync, Switch 1400x1050@60Hz
and 1680x1050@60Hz by [1]+[2] short cut
key (primary = 1400x1050@60Hz)
59 1680 x 1050
@
60
Hz,
65.3 KHz


For Separated and Composite sync, Switch
1400x1050@60Hz and 1680x1050@60Hz
by [1]+[2] short cut key (primary =
1400x1050@60Hz)
60 1920 x 1080
@
50
Hz,
28.1 KHz


61 1920 x 1080
@
60
Hz,
33.8 KHz


62 1920 x 1200
@
60
Hz,
74 KHz




*1. Tolerance ≧±2KHz. (if the range dose not cover other timing mode)
*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message
without blanking.
*3. The image quality of 85Hz mode might be worse than 75Hz.