BenQ VM2221 User manual

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Applicable Country & Regions:
EU
Product Service Manual – Level 2
Service Manual for BenQ:
LTV/VM2221/PAL
9H.Y3375.POE
Notice:
For RO to input specific “Legal Requirement” in specific NS regarding to responsibility and liability
statements.
Please check BenQ’s eSupport web site, http://esupport.benq.com, to ensure that you have the most
recent version of this manual.
First Edition (May , 2007)
© Copyright BenQ Corporation 2006. All Right Reserved.

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Content Index
INTRODUCTION ................................................................................................................................... 3
GENERAL DESCRIPTIONS.................................................................................................................... 5
RELATED SERVICE INFORMATION.................................................................................................... 5
PRODUCT OVERVIEW.......................................................................................................................... 6
SPECIFICATION................................................................................................................... 6
PACKING .......................................................................................................................... 12
CUSTOMER ACCEPTANCE................................................................................................. 16
LEVEL 1 COSMETIC / APPEARANCE / ALIGNMENT SERVICE ..................................................... 18
SOFTWARE UPGRADE PROCESS........................................................................................ 29
EXPLODED VIEW ............................................................................................................. 57
DISASSEMBLY /ASSEMBLY .............................................................................................. 58
LEVEL 2 CIRCUIT BOARD AND STANDARD PARTS REPLACEMENT.......................................... 71
BLOCK DIAGRAM ............................................................................................................ 71
TROUBLESHOOTING......................................................................................................... 72
APPENDIX 1 – SCREW LIST /TORQUE ............................................................................................. 77
APPENDIX 2 – CODE LIST: IR ............................................................................................................ 78

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Introduction
This section contains general service information, please read through carefully. It should be stored
for easy access place.
Important Service Information
RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS.
The RoHS (Restriction of Hazardous Substance in Electrical and Electronic Equipment Directive) is a
legal requirement by EU (European Union) for the global electronics industry which sold in EU and
some counties also require this requirement. Any electrical and electronics products launched in
the market after June 2006 should meet this RoHS requirements. Products launched in the market
before June 2006 are not required to compliant with RoHS parts. If the original parts are not RoHS
complaints, the replacement parts can be non ROHS complaints, but if the original parts are RoHS
compliant, the replacement parts MUST be RoHS complaints. If the product service or maintenance
require replacing any parts, please confirming the RoHS requirement before replace them.
Safety Notice
1. Make sure your working environment is dry and clean, and meets all government safety
requirements.
2. Ensure that other persons are safe while you are servicing the product.
3. DO NOT perform any action that may cause a hazard to the customer or make the product
unsafe.
4. Use proper safety devices to ensure your personal safety.
5. Always use approved tools and test equipment for servicing.
6. Never assume the product’s power is disconnected from the mains power supply. Check that it is
disconnected before opening the product’s cabinet.
7. Modules containing electrical components are sensitive to electrostatic discharge (ESD). Follow
ESD safety procedures while handling these parts.
8. Some products contain more than one battery. Do not disassemble any battery, or expose it to
high temperatures such as throwing into fire or it may explode.
9. Refer to government requirements for battery recycling or disposal.

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Compliance Statement
1. Caution: This Optical Storage Product contains a Laser device. Refer to the product
specifications and your local Laser Safety Compliance Requirements.

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General Descriptions
This Service Manual contains general information. There are 2 levels of service:
Level 1: Cosmetic / Appearance / Alignment Service
Level 2: Circuit Board or Standard Parts Replacement
Related Service Information
BenQ Global Service Website:http://support.benq.com/front/benqmain.asp
support Website:http://bqpgsr.benq.corp.com/customize/asplogin.asp

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Product Overview
Specification
1. Introduction
This specification describes a 22" diagonal LCD TV with aspect ratio of 16:10 which supports up to
1680 x 1050 format and can display true 16.7M colors ( 8-bit/color) . This LCD TV is very thin and
completely free from electromagnetic distortion. So you can install it just about any place. You can
simply place it on a table, hang it on the wall. LCD TV reproduces images by adjusting the brightness,
color and contrast of each individual pixel on the screen.
It has the following features:
(1). Panel:
- Center luminance 500nits (TPY)
- Contrast ratio approximates 700:1 (Typical)
- Viewing angle (Horizontal and vertical) great than
- Resolution: 1680 x 1050, 16:10
(2). PC:
- Analog PC support timing up to SXGA Hz.
- High quality scaling function
- With power saving function (PC mode)
- PC Audio input
(3). Video/TV:
- HDMI 1.2
- HDTV function compatible (480i/480P/1080i/720P/1080P)
-Built-in De-Interlace, Noise Reduction , 2:2 pull down function
(4). Tuner: (USA, TW: NTSC M).
-CVBS, AV Audio, S-Video, Component( YCrCb / YPrPb )
-Sound : Mono/Stereo/SAP
(5). Audio:
- Built-in 12W x2 for 37”/42”.
- SRS Tursurround
- Earphone output
- Audio monitor output
(6). Power:
- Vac ~ Vac universal power
(7). User interface:

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- User controls: on/off switch, key pad with input select, menu, channel up, channel down,
left( - ), right ( + )
- IR remote controller
- Fancy OSD (on screen display) for user control interface
- Color indicator for power on/standby
(8). It is composed of the following material and accessories (Accessory might be adjusted by
different territory request):
-LCD TV *1
-User Manual + warranty card
-A power cord
-Remote control x 1 & AAA batteries x 2

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2. Operational Specification
2.1 Environment
2.1.1 Temperature:
Operating 0°C ~ 40 °C
Storage -20 °C ~ 60 °C
2.1.2 Humidity:
Operating 20% ~ 85% non - condensing
Storage 10% ~ 90% non- condensing

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2.2 Tr ans por ta tio n
Test Result
Step Check Items NO.1 NO.2
1 FOS Test OK OK
2 Packaged Random Vibration Test OK OK
3 FOS Test OK OK
4 Packaged Drop Test OK OK
5 FOS Test OK OK
6 Unpacked Vibration Test OK OK
7 FOS Test OK OK
Package Product Weight
(Kg)
Drop Height (bottom side;
Corner; and Edge close to
bottom side )
(cm)
Drop Height (other sides;
and edge )
(cm)
0<W＜10.0 76 76
10.0 W≦＜20.0 61 61
20.0 W≦＜34.0 46 40
<34 40 40
S/N: S/N:
ITEM Before
Test After Test Before Test After Test Result
Function check (Under at
dark room)
OK OK OK OK OK
Appearance heck OK OK OK OK OK
Inner check OK OK OK OK OK

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Test Sweep
Frequency (Hz) Slope (dB/Oct) PSD (G2/Hz)
5~100 0 0.015
100~200 -6 N/A
200 N/A 0.0038
2.3 Packaging Configuration
Testing with vibration shall be done in each of three mutually perpendicular
axes. Axes are referenced to the position of system as it normally sits in front of
user, i.e., Front-to-back, side-to-side and top-to-bottom.
Sinusoidal Vibration：
Item Description
Sweep Frequency 10~500~10 Hz
Sweep Rate 0.25 octave/minute
Amplitude 0.25g (0 to peak)
Duration Time 15 minute dwell at each resonant frequency (up
to 3 points)
Direction 3 mutually perpendicular axes (x, y, z)
Mechanical and electrical damage should not exist after vibration test.
Product characteristics:
Net Weight (Kg) Gross Weight (Kg)
Dimension w/o Base
W*H*D (mm)
Dimension w/ Base
W*H*D (mm)
6.85 7.3 529*64.3*451 529*184*449
Package dimension:
Carton Interior Dimension (mm)
W*H*D
Carton External Dimension (mm)
W*H*D
626*156*521 630*160*525

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S/N: S/N:ITEM
Before
Test After Test Before Test After Test
Result
Function check (Under at dark
room)
OK OK OK OK OK
Appearance check OK OK OK OK OK
Inner check OK OK OK OK OK

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Packing

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Customer Acceptance
1.0 SCOPE
This document establishes the general workmanship standards and functional Acceptance criteria for LCD
TV model V42L Produced by BenQ Inc.
2.0 PURPOSE
The purpose of this publication is to define a procedure for inspection of the LCD TV by means of a
customer acceptance test, the method of evaluation of defects and rules for specifying acceptance levels.
3.0 APPLICATION
The "Customer Acceptance Criteria" is applicable to the inspection of the LCD TV, completely packed and
ready for dispatch to customers. Unless otherwise specified, the customer acceptance inspection should be
conducted at manufacturer's site.
4.0 DEFINITION
The "Customer Acceptance Criteria" is the document defining the process of examining, testing or
otherwise comparing the product with a given set of specified technical, esthetic and workmanship
requirements leading to an evaluation of the "degree of fitness for use", including possible personal injury
or property damage for the user of the product.
5.0 CLASSIFICATION OF DEFECTS
The defects are grouped into the following classes:
5.1 Critical defect
A critical defect is a defect that judgment and experience indicate is likely to result in hazardous or
unsafe conditions for individuals using, maintaining or depending upon the product.
5.2 Major defect
A major defect is a defect, other than critical that is likely to result in failure, or to reduce materially the
usability of the product for its intended purpose.
5.3 Minor defect
A minor defect is a defect that is not likely to reduce materially the usability of the product for its
intended purpose, or is a departure from established standards having little bearing on the effective use
of operation of the product.
Note: If BenQ defect undefined failure, and it judged that is reduce the merchandise ability,
BenQ CM Inform this defect. After that parties make communication and decide how to solve.
6.0 CLASSIFICATION OF DEFECTIVES
A defective is a product, which contains one or more defects. The defective will be classified into following
classes:
6.1 Critical defective
A critical defective contains one or more critical and may also contain major and/or minor
defects.
6.2 Major defective
A major defective contains one or more defects and may also contain minor defects but contains
no critical defect.
6.3 Minor defective
A minor defective contains one or more minor defects but contains no critical and major
defects.

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7.0 EXPRESSION OF DEFECTIVES
Numberofdefects
Percent of defects = ------------------------------------------ X 100%
Numberofproductsinspected
8.0 INSPECTION STANDARD
Unless otherwise specified, the inspection standard will be defined by SINGLE SAMPLING
PLAN. Level is in use all the time, inspection levels are normal, reduce and tighten.Ⅱ
8.1 Acceptance Quality Level
8.1.1 When a critical defect is found, this must be reported immediately upon detection, the lot or batch shall be
rejected and further shipments shall be held up pending instructions from the responsible person in relevant
organization.
8.1.2
Major Defective:
Minor Defective:
9.0 GENERAL RULES
The inspection must be carried out by trained inspectors having good knowledge of the meaning of “fitness
for use". The inspection must be based upon the documents concerning the completely assembled and packed
product when more defects appear with the same cause only the most serious defect must be taken into
account. Defects found in accessories packed with the product as connecting cables, plugs, adapters and the
like, and being inspected as a part of the complete product, must be included in the evaluation.
The evaluation must be within the limits of the product specification and, for not specified characteristics, be
related to the design model, limit samples or judgment of a jury of experts. Faults must be demonstrable.
10.0 TEST CONDITIONS
Unless otherwise prescribed, the test conditions are as follows:
11.0 TEST EQUIPMENTS

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Level 1 Cosmetic / Appearance / Alignment Service
Visual Inspection
ITEM
Program
Menu
Equipments Requirement Procedure and SPEC
1. voltage confirming Digital models Opposite white checks screen
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1. Using voltage model to measure output place,
checking whether voltage is right..
2. Connect Power, checking whether Power LED
present blue right
2. All reset and enter into
Burn in mode
1. In the meantime, press Keypad MENU and
VOL▼ Key to add AC POWER On to
p
ur
g
e
EEPROM. When
p
ur
g
ed
,
it will automaticall
y
enter into Factory mode.
2. Below VGA mode, no input signal will
automatically enter into Burn in mode. After
enter into Burn in mode, any keyboard cannot
rid Burn in, it must be have VGA signal input
before rid Burn in mode.

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3.VGA adjustment
(Factory mode)
PC or Pattern Generator 5 Opposite white checks screen
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1. Press＂ SOURCE＂ Key and select＂
VGA＂.
2. Check if each Timing can display
normally.
3. If there is a mode can not work after
shift, below 32 grey scale pictures. See
if the color is flat.
4. Do not need color tempt change
self(besides OEM client)
1997/2097/2297:
WARM: x:313 y:329 Y:300±10%
COOL: x:283 y:297 Y:270±10%
1697:
WARM: x:313 y:329 Y:200±10%
COOL: x:283 y:297 Y:180±10%
5. without signal，it will enter Burn-in
mode.
3.1 VGA Setup
PC or Pattern
Generator
1. Press MENU Key to open OSD.
2. Press VOL▲▼Key to open VGA Setup.
3. After finished, choose MENU to exit.
a. Auto color
PC or Pattern
Generator
32 grey scale picture
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1. Press CH▲▼Key to choose Auto Color then
press VOL▲ Key to. enter
2. To confirm 32 scale picture Color is right.
3.2 Picture
PC or Pattern
Generator
Opposite white checks screen
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1. Press MENU Key to open OSD.
2. Press VOL▲▼ Key to select Picture.
3. Press CH▲▼ Key to adjust.
4. After that, choose MENU to exit.
a. Brightness
PC or Pattern
Generator
Opposite white checks screen
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1. Press CH▲▼ Key to choose Brightness.
2. Press VOL ▲ Key. Set upon clients
requirements.

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b. Contrast
PC or Pattern
Generator
Opposite white checks screen
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1.Press CH▲▼ Key to choose Contrast.
2. Press VOL▲ Key Set upon clients
requirements .
c. Scale
PC or Pattern
Generator
Opposite white checks screen
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1. Press CH▲▼Key to choose Scale.
2. Press VOL▲ Key , Set upon clients
requirements . Default is 16:9.
d. Color temp
PC or Pattern
Generator
Opposite white checks screen
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1. Press CH▲▼Key to choose Color temp.
2.Press VOL▲ Key to enter.
2. Press VOL▲ Key ,Set upon clients
requirements
d-a. Warm adjustment
6500ْk
PC or Pattern
Generator
Full white picture
1697 1280*800/60Hz
1997 1440*900/60Hz
2297/2097 1680*1050/60Hz
1. Press MENU Key to open OSD.
2. Choose picture.
3. Press CH▲▼Key to select Color temp.
4. Press VOL▲ Key to enter
5. Press VOL▲ Key to choose Warm
6. Put R.G.B trichroism values
,to make white picture warm temperature for
1997/2097/2297
x:313 y:329 Y:300±10%cd/m
2
1697
x:313 y:329 Y:200±10%cd/m
2