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.
5
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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