ViewSonic VA1930wm-1 User manual

ViewSonic VA1930wm-1
Model No. VS11354
19” Color TFT LCD Display
(VA1930wm-1_SM Rev. 1a Nov. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA- [phone]
Service Manual

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Copyright
Copyright © 2006 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 11/01/2006 Initial Release Jamie Chang

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TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 4
3. Front Panel Function Control Description 11
4. Circuit Description 17
5. Adjustment Procedure 28
6. Troubleshooting Flow Chart 39
7. Recommended Spare Parts List 47
8. Exploded Diagram and Exploded Parts List 49
9. Block Diagram 52
10. Schematic Diagrams 53
11. PCB Layout Diagrams 60

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1. Precautions and Safety Notices
1. SAFETY PRECAUTIONS
This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However,
improper used or installation may cause damage to the monitor as well as to the user.
WARNINGS:
zThis monitor should be operated only at the correct power sources indicated on the label on the rear of the
monitor. If you’re unsure of the power supply in you residence, consult your local dealer or Power Company.
zUse only the special power adapter that comes with this monitor for power input.
zDo not try to repair the monitor by yourself, as it contains no user-serviceable parts. Only the qualified
technician can repair it.
zDo not remove the monitor cabinet. There are high-voltage parts inside that may cause electric shock to
human bodies.
zStop using the monitor if the cabinet is damaged. Have it checked by a service technician.
zPut your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable immediately and
consult your closed dealer.
zAlways unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth. Apply non-ammonia
based cleaner onto the cloth, not directly onto the glass screen.
zDo not place heavy objects on the monitor or power cord.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection
afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage,
wattage, etc. Before replacing any of these components read the parts list in this manual carefully. The use of
substitute replacement parts, which do not have the same safety characteristics as specified in the parts list,
may create shock, fire, or other hazards.
3. SERVICE NOTES
zWhen replacing parts or circuit boards, clamp the lead wires around terminals before soldering.
zKeep wires away from high voltage, high temperature components and sharp edges.
zKeep wires in their original position so as to reduce interference.
zAdjustment of this product please refers to the user’ manual.

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4. Handling and Placing Methods

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2. Specification
1. INTPRODUCTION
FEATURES VA1930wm
Size 19 ”
Luminance (Typ) 300 cd/㎡
Contrast Ratio (Typ) 700:1
Colors (6 bits + 2 bits FRC) 16.2 M
Response Time (Typ) 5 ms
Viewing Angle (H/V) 160 ° / 160 °@>=10
TFTLCD PANEL
Recommend resolution 1440x900@60Hz
Analog (75ohms, 0.7/1.0 Vp-p) Yes
Input Signal
Digital Yes
Separate Sync Yes
Composite Sync Yes
Sync Compatibility
Sync on Green Yes
PC Yes
Power Mac Yes
Compatibility
TV Box (NextVision 6) Yes
Power Voltage AC 100-240V, 50/60Hz Yes
On Mode(Max / Typ) 43 W/38W
Power Consumption
Off Mode (Max) ≦1 W
Audio Yes
Tilt ( 20 ° - -5 °) Yes
Swivel Yes
Pivot No
Ergonomics
Height Adjust Yes
OSD Control [ 1 ] [ 2 ] [ ][▼] [▲] Yes
Physical (W x H x D) 460 x 434 x 230 mm
Dimension
Package (W x H x D) 560 x 525 x 282 mm
Physical (Net Weight) 5.4 kg
Weight
Package (Gross Weight) 6.9 kg
Temperature ( / )℉℃ 32℉-104 /℉0℃-40℃
Operating Condition
Humidity (%) 10 % - 90 %
Temperature ( / )℉℃ -4℉-140 /℉-20℃-60℃
Storage Condition
Humidity (%) 10% - 90 %
Regulation
UL, CUL, FCC-B (ICES), CB, CE, TCO'03, ICES-003B, ISO13406-2, TUV/GS, TUV ERGO(covers
ISO13406-2 & MPRII), TUV-S, NOM, GOST-R, HYGIENIC (20 copies), ENERGY, Energy Star,
CCC, BSMI, PSB, C-TICK, KTL/MIC, SASO, WEEE, RoHS

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2 GENERAL specification
Test Resolution & Frequency 1440x900 @ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls Factory Default:
Contrast = 70%, Brightness = 100%
3 VIDEO INTERFACE
Analog Input Connector DB-15 (Analog), refer the appendix A
Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes
Video Cable Connector DB-15 Pin out Compliant DDC 1/2B
Video Signals Video RGB (Analog) – Separate,
Video Impedance 75 Ohms (Analog)
Maximum PC Video Signal 950 mV with no damage to monitor
Maximum Mac Video Signal 1250 mV with no damage to monitor
DDC 1/2B Compliant with Revision 1.3
Sync Compatibility Separate Sync
Video Compatibility Shall be compatible with all PC type computers, Macintosh
computers, and after market video cards
Resolution Compatibility
640 x 350, 640 x 480, 720 x 400 (640 x 400*), 800 x 600,
832 x 624, 1024 x 768, 1152 x 864, 1280 x 960, 1280 x
1024,1440x900
Exclusions Not compatible with interlaced video
4 POWER SUPPLY
Internal Power Supply Part Number:RLPR-025
Input Voltage Range 90 to 264 VAC
Input Frequency Range 47 to 63 Hertz
Short Circuit Protection Output can be shorted without damage
Over Current Protection 4 A typical at 14.2 VDC
Leakage Current 3.5mA (Max) at 254VAC / 60Hz
Efficiency 80% typical at 115VAC Full Load
Fuse Internal and not user replaceable
Power Dissipation 38 Watts (typ)
Max Input AC Current 0.8 Arms @ 90VAC, 0.4 Arms @265VAC
Inrush Current (Cold Start) 40 A @ 120VAC, 60 A (max) @ 220VAC
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

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2000V 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 be defined
to be in compliance with ISO 7779 (DIN EN27779:1991)
Noise measurements of machines acoustics. Power Switch
noise shall not be considered
US Type Power Cable
Separate 3-prong NEMA 5-15P type plug. Length = 1.8m.
Connects to display.
Color = Black
European Type Power Cable
Schuko CEE7-7 type plug.
Length = 1.8m, Connects to display.
Color = Black
CCC Type Power Cable
Separate 3-prong type plug.
Length = 1.8m. Connects to display.
Color = Black
PSE Type Power Cable
Separate 2-prong NEMA 1-15P type plug. Length = 1.8m.
Connects to display.
Color = Black
Power Saving Operation(Method) VESA DPMS Signaling
Power Consumption On Mode <42 W (max)
Off Mode< 1W
Recovery Time On Mode = N/A, Active Off < 3 sec
5 ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency 30 – 82 kHz
Vertical Refresh Rate
50 – 75* Hz.
Maximum Pixel Clock 135 MHz
Sync Polarity Independent of sync polarity.

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Timing Table
Analog
Item Timing
Separated
Composite
SOG
Digital - TMDS
Remark
1 640 x 350 @ 70 Hz, 31.5 KHz DMT
2 640 x 400 @ 60 Hz, 31.5 KHz
3 640 x 400 @ 70 Hz, 31.5 KHz
4 640 x 480 @ 50 Hz, 24.7 KHz
5 640 x 480 @ 60 Hz, 31.5 KHz DMT
6 640 x 480 @ 67 Hz, 35 KHz For MAC
7 640 x 480 @ 72 Hz, 37.9 KHz DMT
8 640 x 480 @ 75 Hz, 37.5 KHz DMT
9 720 x 400 @ 70 Hz, 31.5 KHz
10 720 x 480 @ 60 Hz, 31.5 KHz DTV
11 720 x 576 @ 50 Hz, 31.3 KHz DTV
12 800 x 600 @ 56 Hz, 35.1 KHz DMT
13 800 x 600 @ 60 Hz, 37.9 KHz DMT
14 800 x 600 @ 72 Hz, 48.1 KHz DMT
15 800 x 600 @ 75 Hz, 46.9 KHz DMT
16 832 x 624 @ 75 Hz, 49.7 KHz MAC
17 1024 x 768 @ 50 Hz, 39.6 KHz
18 1024 x 768 @ 60 Hz, 48.4 KHz DMT
19 1024 x 768 @ 70 Hz, 56.5 KHz DMT
20 1024 x 768 @ 72 Hz, 58.1 KHz
21 1024 x 768 @ 75 Hz, 60 KHz DMT
22 1024 x 768 @ 75 Hz, 60.2 KHz For MAC
23 1152 x 864 @ 75 Hz, 67.5 KHz DMT
24 1152 x 870 @ 75 Hz, 68.7 KHz For MAC
25 1152 x 900 @ 67 Hz, 62.5 KHz For SUN
26 1280 x 720 @ 50 Hz, 37.5 KHz DTV
27 1280 x 720 @ 60 Hz, 45 KHz DTV
28 1280 x 768 @ 50 Hz, 39.6 KHz
29 1280 x 768 @ 60 Hz, 47.8 KHz DMT;
30 1280 x 768 @ 75 Hz, 60.3 KHz DMT;
31 1280 x 960 @ 50 Hz, 49.4 KHz
32 1280 x 960 @ 60 Hz, 59.7 KHz DMT
33 1280 x 960 @ 75 Hz, 75.2 KHz
34 1280 x 1024 @ 50 Hz, 52.7 KHz
35 1280 x 1024 @ 60 Hz, 64 KHz DMT
36 1280 x 1024 @ 75 Hz, 80 KHz DMT
37 1440 x 900 @ 60 Hz 59.9 KHz DMT
Primary Presets
1440x900 @ 60Hz
User Presets
Number of User Presets (recognized timings) Available: 10 presets total in FIFO configuration
Changing Modes
zMaximum Mode Change Blank Time for image stability: 3 seconds (Max), excluding “Auto Image Adjust” time.
zUnder DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting when execute “Auto
Image Adjust”.
The monitor needs to do “Auto Image Adjust” the first time when a new mode is detected. (See section “0-Touch™
Function Actions”)