BenQ MK2432 User manual

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Applicable Country & Regions:
Taiwan
Product Service Manual – Level 2
Service Manual for BenQ:
Monitor-TV /MK2432
<9H.V0H75.JCT>
Version: 00a
Date: 2009/08/31
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 mos
t
recent version of this manual.
First Edition (
A
ugust 2009)
© Copyright BenQ Corporation 2007. All Right Reserved.

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Content Index
ABBREVIATIONS & ACRONYMS ......................................................................................................... 2
ABOUT THIS MANUAL......................................................................................................................... 4
INTRODUCTION ................................................................................................................................... 4
GENERAL DESCRIPTIONS.................................................................................................................... 5
RELATED SERVICE INFORMATION.................................................................................................... 5
PRODUCT OVERVIEW.......................................................................................................................... 5
SPECIFICATION ................................................................................................................ 6
PACKING .......................................................................................................................... 26
CUSTOMER ACCEPTANCE............................................................................................ 28
LEVEL 1 COSMETIC / APPEARANCE / ALIGNMENT SERVICE ..................................................... 31
VISUAL INSPECTION &CLEANING ............................................................................. 31
SOFTWARE /FIRMWARE UPGRADE PROCESS........................................................... 39
ADJUSTMENT /ALIGNMENT PROCEDURE ............................................................... 46
LEVEL 2 CIRCUIT BOARD AND STANDARD RARTS REPLACEMENT ......................................... 49
EXPLODED VIEW ............................................................................................................ 49
DISASSEMBLY / ASSEMBLY............................................................................................ 51
SYSTEM BLOCK DIAGRAM............................................................................................ 57
TROUBLE SHOOTING.................................................................................................... 58
APPENDIX 1- SCREW LIST/TORQUE................................................................................................ 60
APPENDIX 2 – IR CODE ...................................................................................................................... 61
APPENDIX 3- WALL MOUNT............................................................................................................. 62
Abbreviations & Acronyms

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A
A/D Converter
A
nalog to Digital Converter
B
BenQ BenQ Corporation
C
D
DTV Digital Television
E
EMI Electromagnetic Interference
F
G
H
HDMI High Definition Multimedia Interface
I
J
K
L
M
N
NTSC National Television System Committee
O
OSD On Screen Display
P
PAL Phase Alternating Line
Q
R
RS232 Interface Between Data Terminal Equipment and Data
Communications Equipment Employing Serial Binary
Data Interchange
S
T
U
V
About This Manual

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This manual contains information about maintenance and service of BenQ products. Use this
manual to perform diagnostics tests, troubleshoot problems, and align the BenQ product.
Important
Only trained service personnel who are familiar with this BenQ Product shall
perform service or maintenance to it. Before performing any maintenance or service,
the engineer MUST read the “Important Safety Information”.
Trademark
The following terms are trademarks of BenQ Corporation:
BenQ
Senseye
Other companies, products, or service names may be the trademarks of their respective companies.
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

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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.
Compliance Statement
Caution: This Optical Storage Product contains a Laser device. Refer to the product specifications
and your local Laser Safety Compliance Requirements.
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
Service Web Site
BenQ Global Service Website: http://www.benq.com/support/
eSupport Website: http://esupport.benq.com/v2
Product Overview
This specification describes a display device that is based on a 23.6 inch TFT LCD display

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TV/Monitor. The part number of the panel is CMO M236H1-L01. The native resolution of the
panel is 1920 X 1080. At this resolution the monitor device can be described as WUXGA and the
television can be best described as “HDTV” or Extended Definition Television. This
television/monitor can be used to display high definition television images as images that are scaled
to the native resolution of 1920 X 1080. The television/monitor is also provided with a television
tuner as an integral part of the systems. This provision allows the monitor to function directly as a
television. It is capable of receiving off-the-air, cable, and satellite transmissions. The monitor inputs
that are provided have the ability to adapt this device to practically any consumer video source
output that is available in the marketplace. It features S-video, composite video, and component
video. The monitor computer inputs are VGA analog and HDMI(PC and HDCP). This
television/monitor provides maximum flexibility in the number of applications that it can provide
to the end user.
Specification
(1). Panel:
- Center luminance 300nits (Typical) ,250nits (Min)
- Contrast ratio approximates 1000:1 (Typical) 700:1(Min)
- Viewing angle (Horizontal and vertical) 170 (H) / 160 (V) (Typ.)
- Resolution: 1920 x 1080, 16:9
(2). PC:
- Analog PC support timing up to 1920*1080 60Hz 138.5MHz
- High quality scaling function
- With power saving function (PC mode)
- PC Audio input
(3). Video/TV:
- HDMI 1.3
- HDTV function compatible (480i, 480p, 720p, 1080i, 1080p)
- Built-in De-Interlace, Noise Reduction, 3:2 pull down function
(4). Tuner: (SECAM D/K, PAL B/G, I).
-CVBS, AV Audio, S-Video, Component( YCrCb / YPrPb )
-Sound : Mono/Stereo/SAP
(5). Audio:
- Built-in 5W x2 for 23.6”.
- Earphone output
- Audio fixed output
(6). Power:
-110 Vac ~ 240 Vac universal power
(7). User interface:
- User controls: on/off switch, key pad with input select, menu, channel up, channel down, left( - ),

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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
-A VGA cable
Operational Specification
(1) Environment
Temperature:
-The operating temperature range shall be 0oC to 40oC.
-The non-operating temperature range shall be –20oC to 60oC.
Humidity:
-Operating 10% to 65% non-condensing
-Non-operating 0% to 90% non-condensing
(2) Physical Specifications
Product characteristics:
Net Weight (Kg) Gross Weight (Kg)
Dimension w/o Base
W*H*D (mm)
Dimension w/ Base
W*H*D (mm)
6.8Kg 8.7Kg 566.7*387.4*84.4 566.7*442.7*216
Package dimension:
Carton Interior Dimension (mm)
W*H*D
Carton External Dimension (mm)
W*H*D
610*483*135 620*508*145
Assembly Specification:
ITEMS Specification
Gap LCD Panel/bezel

1.2mm

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(3) Input / Output Signal Specification
1 AC inlet (AC Power input)
2 HDMI input (DVI 1.0 specification compatible)
3 VGA (D-Sub-15 pin) Input
4 Component Video (YPbPr) input
5 Composite Video (CVBS) input
6 S-Video input
7 AV/ S-Video Shared audio input (RCA L / R)
8 Component Video (YPbPr) audio input (RCA L / R)
9 Fixed Audio Out (RCA L / R)
10 PC Audio input for VGA / DVI
11 Headphone Jack
12 Terrestrial Analog TV (NTSC-M) input

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1. PC Analog Signal
Signal cable :
D-Sub: 15pin D-sub connector is on the captive signal cable for IBM VGA or compatible graphic
adapters. The shall be 1.8 meters long.The pin assignment of this connector is described as below:
15
610
11 15
Pin D-Sub Connector
1 Red
2 Green
3 Blue
4 RX
5 GND
6 Red GND
7 Green GND
8 Blue GND
9 +5V for DDC
10 GND
11 TX
12 SDA
13 H-s
y
nc
14
V
-s
y
nc
15 SCL
Signal Level:
RGB separate, Analog 0.7Vp-p/75 Ohm
Input signal Quality:
(1) Rise/Fall time
-Video Signal: less than 4.0ns
(2) TTL Signal Level
The levels of Horizontal & Vertical Sync will be TTL levels, their high level will be 2.4-5.5V, and low
level will be 0-0.2V.
(3) Video Signal Level
The video signal when terminated with an idea 75 ohm termination will have a range of 0V to 0.7V
(normal), and its full scale output will be 0.7V and black level will be between 0V and 0.1V.

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Signal Timing:
Mode
Resolution
Plus
Frequency
Horizontal
Frequency
(kHz)
Vertical
Frequency
(Hz)
Pixel
Frequency
(MHz)
IBM, VGA 720x400@70Hz 31.469 70.080 28.320
VGA
640x480@60 Hz 31.469 59.940 25.175
640x480@72 Hz 37.861 72.809 31.500
640x480@75 Hz 37.500 75.000 31.500
SVGA
800x600@56Hz 35.156 56.250 36.000
800x600@60Hz 37.879 60.317 40.000
800x600@72Hz 48.077 72.188 50.000
800x600@75Hz 46.875 75.000 49.500
XGA
1024x768@60Hz 48.363 60.004 65.000
1024x768@70Hz 56.476 70.069 75.000
1024x768@75Hz 60.023 75.029 78.750
XGA+ 1152x864@75Hz 67.500 75.000 108.000
WXGA+ 1280x960@60Hz 60.000 60.000 108.000
SXGA 1280x1024@60Hz
63.981 60.020 108.000
1280x1024@75Hz 79.976 75.025 135.000
WXGA 1360x768@60Hz 47.712 60.015 85.500
WXGA+ 1440x900@60Hz 55.935 59.887 106.500
WSXGA+ 1680x1050@60Hz 65.290 59.954 146.250
WUXGA 1920x1080@60Hz(R) 66.590 59.930 138.500
WUXGA 1920x1080@60Hz 67.500 60.000 148.500
MAC 640x480@67Hz 35.000 66.667 30.240
MAC 832x624@75Hz 49.725 74.550 57.283
MAC 1152x870@75Hz 68.681 75.062 100.000
Remark: To make sure the good compatibility, the timings listed in above table is not always same as
in EDID.
2. Component Video Signal:
Connector Pin definition:
(1) Component video pin define:
A B C
(A) Cr/Pr Input
(B) Cb/Pb Input
(C) Y Input for YCrCb or YPrPb.