ViewSonic VA2226w-1 User manual

ViewSonic VA2226w-1
Model No. VS11803
22” Color TFT LCD Display
(VA2226w-1_SM Rev. 1a Aug. 2007)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA- [phone]
Service Manual

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ViewSonic Corporation Confidential - Do Not Copy VA2226w-1
Copyright
Copyright © 2007 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.
Product disposal at end of product life
The lamp in this product contains mercury. Please dispose of in accordance with local, state or
federal laws.
Revision History
Revision SM Editing Date ECR Number Description of Changes Editor
1a 8/16/2007 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 ..................................................................... 27
4. Circuit Description ............................................................................................................. 32
5. Adjusting Procedure.......................................................................................................... 42
6. Trouble Shooting Flow Chart ............................................................................................ 53
7. Block Diagrams ................................................................................................................ 61
8. Schematic Diagrams ........................................................................................................ 62
9. PCB Layout Diagrams ...................................................................................................... 67
10. Exploded Diagram And Spare Parts List........................................................................ 71
11. Recommended Spare Parts List .................................................................................... 74

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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:
This 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.
Use only the special power adapter that comes with this monitor for power input.
Do not try to repair the monitor by yourself, as it contains no user-serviceable parts. Only the
qualified technician can repair it.
Do not remove the monitor cabinet. There are high-voltage parts inside that may cause
electric shock to human bodies.
Stop using the monitor if the cabinet is damaged. Have it checked by a service technician.
Put your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable
immediately and consult your closed dealer.
Always 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.
Do 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
When replacing parts or circuit boards, clamp the lead wires around terminals before
soldering.
Keep wires away from high voltage, high temperature components and sharp edges.
Keep wires in their original position so as to reduce interference.
Adjustment of this product please refers to the user’ manual.

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4. Handling and Placing Methods

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2. Specification
Product definition and specification
Product Name ViewSonic VA2226w
Oracle P/N VA2226W
Model Number VS11803
OSD Languages
English, French, German, Italian, Spanish, Finnish,
Japanese, Russian Simplified Chinese, Traditional
Chinese, Korean
TFT LCD Panel and Model #
1 st : INL MT220WW01 V0
2nd : AUO M220EW01 V0
3rd : INL MT220W01 V2
Scalar MST TSUMU58WHJ-LF
Input Signal Analog x1 / Digital x1
Sync Compatibility Separate Sync / Composite Sync / SOG
Adapter Internal Power Board
Power Cable Yes,
refer to APPENDIX B: Power Cable
A
nalog Cable (1.8 m, black), with PC 2001 and
Hot Plug Detect &DDC
Yes
(Detached cable; refer the Appendix A)
DVI-D Cable(1.8m, black) with PC 2001 For Region code = P/A/J/K/S units only
Audio Cable(1.8m, black) with PC 2001 Yes
MIC Cable(1.8m, black) with PC 2001 No
USB Cable (V2.0) No
ViewSonic CD Wizard
ViewSonic Quick Start Guide
Arabic, English, Finnish, Spanish, German,
Italian, Japanese, Swedish, Polish, Korean,
Portuguese, Russian, Turkish , French, Czech,
Hungarian, Simplified Chinese, Traditional
Chinese
Greek, Dutch.
PerfectSuite CD No
Screen Protector Mylar Yes
Foot Protector plastic No
Energy start sticker Yes
Service Insert For Region code = M units only
Warranty Sticker For Region code = G units only
Warranty Card For Region code = G units only
Carton Sticker For Region code = G units only
PE bag of Carton For Region code = G units only
Manufacture address sticker For Region code = G units only

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2-1 GENERAL specification
Test Resolution & Frequency 1680x1050@ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls Factory Default:
Contrast = 70%, Brightness = 100%
2-2 VIDEO INTERFACE
Input Connector (refer the Appendix A) Analog = DB-15
Digital = DVI-D
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 Pin out Refer to Appendix A; Compliant DDC/CI
Video Signals
Video RGB (Analog)
Separate Sync / Composite Sync / SOG
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 version 1.1
Digital link protection HDCP
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 Refer to Segment 2-5
Exclusions Not compatible with interlaced video
2-3 USB INTERFACE
No USB interface

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2-4 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 5A typical at 14.0 VDC
Leakage Current 3.5mA (Max) at 254VAC / 60Hz
Efficiency (at 115VAC Full Load) Typical: 80%
Minimum: 75%
Fuse Internal and not user replaceable
Power Output 38 Watts (typ)
Ripple and Noise Ripple: <3%
Noise: <1%
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
Power Consumption
Mode LED Power Consumption
On Blue 38W (typ)
43W (max)
Active off Amber <2W
Off Off <1W
Recovery Time On Mode = N/A, Active Off < 3 sec

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2-5 ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency 24 – 82 kHz
Vertical Refresh Rate 50 – 75 Hz
Maximum Pixel Clock 135 MHz
Sync Polarity Independent of sync polarity
Timing Table
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 


VESA
8 640 x 480 @ 75 Hz, 37.5 KHz 


VESA
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 


VESA
13 800 x 600 @ 60 Hz, 37.9 KHz 


VESA
14 800 x 600 @ 72 Hz, 48.1 KHz 


VESA
15 800 x 600 @ 75 Hz, 46.9 KHz 


VESA
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 


VESA
19 1024 x 768 @ 70 Hz, 56.5 KHz 


VESA
20 1024 x 768 @ 75 Hz, 60 KHz 


VESA
21 1152 x 864 @ 75 Hz, 67.5 KHz 


VESA
22 1152 x 870 @ 75 Hz, 68.7 KHz 


For MAC
23 1152 x 900 @ 67 Hz, 62.5 KHz 


For SUN
24 1280 x 720 @ 50 Hz, 37.5 KHz 


DTV
25 1280 x 720 @ 60 Hz, 45 KHz 


DTV
26 1280 x 768 @ 50 Hz, 39.6 KHz 



27 1280 x 768 @ 60 Hz, 47.8 KHz 


CVT

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28 1280 x 768 @ 75 Hz, 60.3 KHz 


CVT
29 1280 x 960 @ 50 Hz, 49.4 KHz 



30 1280 x 960 @ 60 Hz, 59.7 KHz 


VESA
31 1280 x 960 @ 75 Hz, 75.2 KHz 


VESA
32 1280 x 1024 @ 50 Hz, 52.7 KHz 



33 1280 x 1024 @ 60 Hz, 64 KHz 


VESA
34 1280 x 1024 @ 75 Hz, 80 KHz 


VESA
35 1440 x 900 @ 60 Hz 55.9 KHz 


VESA
36 1440 x 900 @ 75 Hz 70.6 KHz 


VESA
37 1600 x 1200 @ 60 HZ 75.0 KHz 


VESA
38 1680 x 1050 @ 60 HZ 65.3 KHz 


CVT
*1. Tolerance ≧±2KHz (if no overlapping issue)
*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 50Hz mode might be worse than 60Hz.
Primary Presets
1680x1050 @ 60Hz
User Presets
Number of User Presets (recognized timings) Available: 10 presets total in FIFO configuration
Changing Modes
● Maximum Mode Change Blank Time for image stability : 5 seconds (Max), excluding “Auto
Adjust”time
● Under DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting when
execute “Auto Adjust”
● The monitor needs to do “Auto Adjust” the first time a new mode is detected
(see section “0-Touch™ Function Actions”)
● While running Change Mode, Auto Adjust or Memory Recall, the image shall blank

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2-6 FRONT PANEL CONTROLS AND INDICATORS
2-6-1 Front Panel Hardware Controls
Power Switch (Front Head) Power Control, soft Power Switch.
Power LED (Front Head) Blue – ON
Amber – Active Off
Dark = Soft Power Switch OFF
Front Panel Controls (Head)
[] [ 1 ] [ 2 ] [▲] [▼]
[] Power
[ 1 ] BUTTON 1
[ 2 ] Button 2
[▲] UP ARROW BUTTON
[▼] DOWN ARROW BUTTON
Note: Power Button, Button 1 and Button 2
must be one-shot logic operation. (i.e. there
should be no cycling)
Reaction Time OSD must fully appear within 0.5s after
pushing Button 1
2-6-2 Short Cuts Function from the button(s)
[1] Main Menu
(refer to segment 2-6-3)
[2] Input toggle (Analog or Digital; refer to Appendix D)
[▼] To immediately activate Brightness menu. It should be change to
Contrast OSD by push button [2]
(refer to the Brightness OSD in segment 2-6-3)
[▲] To immediately activate Contrast menu. It should be change to
Brightness OSD by push button [2]
(refer to the Contrast OSD in segment 2-6-3)
[▼]+ [▲] Recall both of Contrast and Brightness to default without OSD
message.
[1] + [2] Toggle 720x400 and 640x400 mode when input 720x400 or
640x400 mode
[1] + [▼] + [▲]
(Keep pushing 5 sec)
White Balance
1. It will not shown on user’s guide
2. OSD message as below,
(Image = no blanking)
[1] + [▲] OSD Lock
(refer to segment 2-6-4)

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[1] + [▼] Power Lock
(refer to segment 2-6-5)
[2] + [▼] Switch DDC/CI and DDC/2B (DDC/CI enable/disable) and show
following message for 3 seconds,
When switch to DDC/CI
When switch to DDC/2B
[▲] 1. Long Press [up] key 3 seconds to switch DCR On/Off,
2. Loop: DCR On <=> DCR Off
When switch to DCR ON
When switch to DCR OFF
3. DCR Off in Factory mode.
4. Reset to default when re-power on/off
5. Message will appear only after Hot Key is pressed
[1]+ [ ] All reset
No signal + [ ] + [2] Burning mode
Signal + [2] + [ ] Factory Mode
Remark : All the short cuts function are only available while OSD off

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2-6-3 MAIN MENU OSD TABLE
Main Menu
Level 1 Level 2 Level 3
Auto Image Adjust
1. Background = blanking
2. The message OSD position is at the
center.
3. After auto tune, OSD shall be off
4. Only for analog mode
Contrast
1. Adjust range = 0 to 100
2. Default = 70
3. Key button definition:
[1] = Back to Main Menu or OSD off
(depend on previous status)
[2] = Change to Brightness OSD
[Up] = Increase the OSD value setting
[Dn] = Decrease the OSD value
[Up]+[Dn]: Recall to default
Contrast/Brightness
Jump to Contrast OSD directly
Brightness
1. Adjust range = 0 to 100
2. Default = 100
1. Key button definition:
[1]: OSD off
[2]: Execute the selected function
[Up]: Rolling up the slider
(When push the button on the top position, the slider
shall go down to the bottom item)
[Dn]: Rolling down the slider

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3. Key button definition:
[1] = Back to Main Menu or OSD off
(depend on previous status)
[2]: Change to Contrast OSD
[Up]: Increase the OSD value setting
[Dn]: Decrease the OSD value
[Up]+[Dn]: Recall to default
Analog
Step 1: Turn off OSD.
Step 2:
1. Target video input port = Analog
2. If signal detected from target port,
change to target port.
3. If no signal detected from target port,
keep existing input port.
Step 3: Show on Input Message OSD at
the right-top corner of screen for 1
second.
Input Select
1. Show on existing input port by red color
2. Key button definition:
[1]: Back to previous OSD status
[2]: Change to the selected input port
[Up]: Move the slider to Analog
[Dn]: Move the slider to Digital
Digital
Step 1: Turn off OSD.
Step 2:
1. Target video input port = Digital
2. If signal detected from target port,
change to target port.
3. If no signal detected from target port,
keep existing input port.
Step 3: Show on Input Message OSD at
the right-top corner of screen for 1
second.
sRGB
Change Color setting to sRGB
9300K
Change Color setting to 9300K
6500K
Change Color setting to 6500K
5400K
Change Color setting to 5400K
Color Adjust
1. Show on existing input port by red color
2. Key button definition:
[1]: Back to previous OSD status
[2]: Change to the selected color setting
[Up]: Move up the slider
[Dn]: Move down the slider
User Color
Jump to Red OSD directly
Red

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1. Adjust range = 0 to 100
2. Default = 100
3. Key button definition:
[1]: Back to Color Adjust OSD
[2]: Jump to Green OSD
[Up]: Increase the OSD value setting
[Dn]: decrease the OSD value setting
Green
1. Adjust range = 0 to 100
2. Default = 100
3. Key button definition:
[1]: Back to Color Adjust OSD
[2]: Jump to Blue OSD
[Up]: Increase the OSD value setting
[Dn]: decrease the OSD value setting
Blue
1. Adjust range = 0 to 100
2. Default = 100
3. Key button definition:
[1]: Back to Color Adjust OSD
[2]: Jump to Red OSD
[Up]: Increase the OSD value setting
[Dn]: decrease the OSD value setting
Information

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Key button definition:
[1]: Back to Main Menu OSD
Horizontal Position
1. Adjust range = 0 to 100
2. Key button definition:
[1]: Back to Manual Image Adjust OSD
[2]: Change to Vertical Position OSD
[Up]: Increase the OSD value setting
[Dn]: Decrease the OSD value
H/V Position
Jump to Horizontal Position OSD directly
Vertical Position
1. Adjust range = 0 to 100
2. Key button definition:
[1]: Back to Manual Image Adjust OSD
[2]: Change to Horizontal Position OSD
[Up]: Increase the OSD value setting
[Dn]: Decrease the OSD value
Horizontal Size
1. Adjust range = 0 to 100
2. Key button definition:
[1]: Back to Manual Image Adjust OSD
[Up]: Increase the OSD value setting
[Dn]: Decrease the OSD value
Manual Image Adjust
1. Key button definition:
[1]: Back to previous OSD status
[2]: Execute the selected function
[Up]: Rolling up the slider
(When push the button on the top
position, the slider shall go down to
the bottom item
[Dn]: Rolling down the slider
(When push the button on the bottom
position, the slider shall go down to
the top item
2. Under Digital mode, all the H./V.
Position, Horizontal Size and Fine
Tune shall be disabled with gray color.
And it should not be selected.
3. Under native mode, Sharpness shall be
disabled with gray color. And it should
not be selected.
4. When Dynamic Contrast is
selected, the right-bottom side
description will change to “[ 2 ]:
/”
Fine Tune

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1. Adjust range = 0 to 100
2. Key button definition:
[1]: Back to Manual Image Adjust OSD
[Up]: Increase the OSD value setting
[Dn]: Decrease the OSD value
Sharpness
1. Adjust range = 0 to 100
2. Key button definition:
[1]: Back to Manual Image Adjust OSD
[Up]: Increase the OSD value setting
[Dn]: Decrease the OSD value
Dynamic Contrast
Swap on and off the Dynamic Contrast
function
English
Set OSD language to English and keep in
Language Select OSD
French
Set OSD language to French and keep in
Language Select OSD
German
Set OSD language to German and keep in
Language Select OSD
Spanish
Set OSD language to Spanish and keep in
Language Select OSD
Italian
Set OSD language to Italian and keep in
Language Select OSD
Finnish
Set OSD language to Finnish and keep in
Language Select OSD
Setup Menu
1. Key button definition:
[1]: Back to Main Menu OSD
[2]: Execute the selected function
[Up]: Rolling up the slider
(When push the button on the top
position, the slider shall go down to
the bottom item)
[Dn]: Rolling down the slider
(When push the button on the
bottom position, the slider shall go
down to the top item)
2. When Resolution Notice / Input
Signal Notice / OSD Background
/ OSD Pivot is selected, the
right-bottom side description will
change to “[ 2 ]: /”
Language Select
1. Show on existing input port by red color
2. Key button definition:
[1]: Back to previous OSD status
[2]: Change to the selected language
setting
[Up]: Rolling up the slider
(When push the button on the top
position, the slider shall go down to
the bottom item
[Dn]: Rolling down the slider
(When push the button on the bottom
Russian
Set OSD language to Russian and keep in

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Language Select OSD
Japanese
Set OSD language to Japanese and keep
in Language Select OSD
Korean
Set OSD language to Korean and keep in
Language Select OSD
Simplified Chinese
Set OSD language to Simplified Chinese
and keep in Language Select OSD
position, the slider shall go down to
the top item
Traditional Chinese
Set OSD language to Traditional Chinese
and keep in Language Select OSD
Resolution Notice
Swap on and off the Resolution Notice
function
OSDH.Position
1. Adjust range = 0 to 100
2. Default = 50
3. Key button definition:
[1]: Back to Setup Menu OSD
[2]: Change to OSD V. Position OSD
[Up]: Increase the OSD value setting
(move OSD right)
[Dn]: Decrease the OSD value setting
(move OSD left)
[Up]+[Dn]: Recall to default value
OSD Position
Jump to OSD H. Position OSD directly
OSDV.Position
1. Adjust range = 0 to 100
2. Default = 50
3. Key button definition:
[1]: Back to Setup Menu OSD
[2]: Change to OSD H. Position OSD
[Up]: Increase the OSD value setting
(move OSD up)
[Dn]: Decrease the OSD value setting

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(move OSD down)
[Up]+[Dn]: Recall to default value
5
Set OSD Time Out to 5 Seconds
15
Set OSD Time Out to 15 Seconds
30
Set OSD Time Out to 30 Seconds
OSD Time Out
1. Adjust range = 5, 15, 30, 60
2. Default = 15
3. Key button definition:
[1]: Back to Setup Menu OSD
[Up]: Increase the OSD value setting
[Dn]: Decrease the OSD value setting
[Up]+[Dn]: Recall to default value
60
Set OSD Time Out to 60 Seconds
OSD Background
Swap on and off the OSD Background
Memory Recall
1. Background = blanking
2. Recall white balance to factory setting
2. Recall all the OSD setting to the default.
(exclude the R/G/B in User Color)
2. Show the message OSD position is at
the center for 3 seconds.
3. Clean FIFO timing mode buffer
4. Execute Auto Image Adjust
Note: Memory Recall should not effect on
Mute, Language, Power Lock, User Color
Settings or Input Priority