BenQ E24-5500 User manual

1
Applicable Country & Regions: Europe
Service Manual for BenQ:
LCD E24-5500
(D-SUB + HDMI + Audio + USB +
S-Video+ YPbPr + SPDIF +
SCART + Common Interface +
Black Chassis Colors)
P/N: 9H.V1875.TBE
Product Service Manual – Level 1~2
Version: 1st
Date:12-20-2010
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 (Dec. 2010)
©Copyright BenQ Corporation 2010. All Right Reserved.

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Content Index
Abbreviations & Acronyms........................................................................................................................................3
1. About this Manual...................................................................................................................................................5
1.1 Important ............................................................................................................................................................5
1.2 Trademark ..........................................................................................................................................................5
2. Introduction.............................................................................................................................................................6
2.1 RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS.....................................................6
2.2 Safety Warning and Notice.................................................................................................................................6
2.3 Compliance Statement .......................................................................................................................................7
3. General Description................................................................................................................................................8
4. Related service information...................................................................................................................................8
5. Product Overview ...................................................................................................................................................9
5.1 Monitor Specifications ........................................................................................................................................9
5.2 Packing.............................................................................................................................................................11
5.3 Customer Acceptance ......................................................................................................................................13
Level 1 Cosmetic / Appearance / Alignment Service ............................................................................................15
Visual Inspection & Cleaning..................................................................................................................................15
Software/Firmware Upgrade Process ....................................................................................................................25
Adjustment / Alignment Procedure.........................................................................................................................29
Level 2 Circuit Board and Standard Parts Replacement ......................................................................................40
Product Exploded View ..........................................................................................................................................40
Six Angles’ View .....................................................................................................................................................42
Product Disassembly..............................................................................................................................................43
Assembly SOP .......................................................................................................................................................47
Block Diagram ........................................................................................................................................................51
Schematic Diagram ................................................................................................................................................53
Troubleshooting......................................................................................................................................................71
PCB LAYOUT.............................................................................................................................................................77
Appendix 1 – Screw List / Torque ...........................................................................................................................87
Appendix 2 –CODE LIST: IR.....................................................................................................................................88

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Abbreviations & Acronyms
A
ADC Analog to Digital Converter
AFC Automatic Frequency Control: control signal used to tune to the correct frequency
B
BenQ BenQ Corporation
BTSC Broadcast Television System Committee
C
CPU Central Process Unit
CVBS Composite Video Blanking and Synchronization
D
DLP Digital Light Processing / Texas Instruments®
DMD Digital Micro mirror Device
DRAM Dynamic RAM
DVI Digital Visual Interface
DVI-D Digital Visual Interface-digital
DVI-I Digital Visual Interface-Integrated
E
EEPROM Electrically Erasable and Programmable Read Only Memory
F
FLASH FLASH memory
G
G-TXT Green Teletext
H
HDMI High Definition Multimedia Interface, digital audio and video interface
HP Head Phone
I
IR Infra-red
I2C Integrated IC bus
L
LED Light Emitting Diode
LVDS Low Voltage Differential Signal, data transmission system for high
M
MOSFET Metal Oxide Semiconductor Field Effect Transistor

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N
NC Not Connected
NVM Non Volatile Memory: IC containing TV related data (for example, options)
O
OSD On Screen Display
P
PC Personal Computer
PCB Printed Circuit Board (or PWB)
R
RC Remote Control transmitter
RGB Red, Green and Blue. The primary color signals for TV. By mixing levels of R, G
and B, all colors (Y/C) are
ROM Read Only Memory
S
SDA Data signal on I2C bus
SDRAM Synchronous DRAM
SW Sub Woofer / Software
T
THD Total Harmonic Distortion
V
VGA Video Graphics Array
Y
YPbPr Component video (Y= Luminance, Pb / Pr= Color difference signals B-Y and R-Y,
other amplitudes w.r.t. to YUV)
Y/C Video related signals: Y consists of luminance signal, blanking level and sync; C
consists of color signal.

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1. About this Manual
The purpose of Service Manual is to provide a guide line to engineers to repair different models. The appearance
and capability is introduced in this Service Manual. It is better for repair engineer to have a rough idea of this model
through reading the Service Manual. Please do pay attention to the item part of the disassembly when repair the
machine and also do the protection of panel any time. When repairing the circuit board, please follow the
requirement of RoHS and refer to the circuit diagram and repairing process that attached in the Service Manual.
The method of firmware updated, the way of using the menu and some information that may be used when
repairing are also attached in the Service Manual that provide repair engineer various choice.
1.1 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”.
1.2 Trademark

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2. Introduction
This section contains general service information, please read through carefully. It should be stored for easy
access place.
2.1 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.
2.2 Safety Warning and Notice
Installation
1. Do not use your monitor under any of the following environmental conditions:
Extremely high or low temperature, or in direct sunlight
Dusty places
Highly humid, exposed to rain, or close to water
Exposed to vibrations or impacts in places such as cars, buses, trains, and other rail vehicles
Near heating appliances such as radiators, heaters, fuel stoves, and other heat-generating items (including
audio amplifiers)
An enclosed place (such as a closet or bookcase) without appropriate ventilation
An uneven or sloping surface
Exposed to chemical substances or smoke
2. Do not block vents and openings by clothes or curtains.
3. Carry the monitor carefully.
4. Do not place the monitor face down on the floor or a desk surface directly. Otherwise, scratches on the panel
surface may occur.
5. Do not place heavy loads on the monitor to avoid possible personal injury or damage to the monitor.
6. Ensure that children do not hang or climb onto the monitor.
7. Keep all packing bags out of reach of children.

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Operation
1. To protect your eyesight, please refer to the user manual to set the optimal screen resolution and the viewing
distance.
2. To reduce eye fatigue, take a break on a regular basis while using the monitor.
Avoid taking either one of the following actions for a long time. Otherwise, burn marks may occur.
Use the monitor in the aspect ratio of 2.35:1, 4:3, or 16:9.
Place a still image (such as an OSD menu, fixed text or image) on the screen.
3. To avoid possible damage to the monitor, do not touch the monitor panel by hand, pen, or any other sharp
objects.
4. Excessively frequent plug and unplug of video connectors (D-sub / HDMI) may cause damage to the monitor.
5. This monitor is designed mainly for personal use. If you want to use the monitor in a public place or a harsh
environment, contact your nearest BenQ service center for assistance.
6. To avoid possible electric shock, do not dissemble or repair the monitor.
7. If a bad smell or an abnormal sound appears to come from the monitor, contact your nearest BenQ service
center for assistance immediately.
Cleaning
1. Ensure that the power is unplugged before cleaning your monitor
2. Use a monitor cleaner and a soft cloth to clean your monitor.
3. Do not use solvents such as alcohol to clean your monitor.
Power
1. To avoid possible damage to the monitor, do not use it in a region where power supply is unstable.
2. Ensure that the power cord is connected to a grounded power outlet before turning on the monitor.
3. Use only the power cord provided by BenQ.
4. Never use a power cord that appears to be damaged or frayed.
5. To avoid possible danger, observe the total electric load when using the monitor with a (multi-outlet) extension
cord.
6. Always turn off the monitor before unplugging the power cord.
2.3 Compliance Statement
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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3. General Description
This new LCD (Liquid Crystal Display) monitor BenQ E24-5500 offers numerous features and functions, for
example:
LED
Minimal space requirements thanks to slim casing
Optimum ergonomic characteristics (totally distortion-free, excellent picture definition and color purity right into
the corners)
Contrast ratio 3000:1 (Panel) / 20 million:1 (DCR), brightness 250nits
MAX. resolution (1920 x 1080)
Automatic scanning of horizontal frequencies from 30 to 83 kHz and refresh rates (vertical frequencies) from 56
to 76 Hz (absolutely flicker-free)
Digital screen controller with microprocessor for storing 15 different display modes
Freely adjustable color alignment for matching the screen colors to the colors of various input and output devices
Convenient operation via integrated OSD (On-Screen-Display) menu
VESA-DDC compatibility
Plug & play capability
Power management for reducing power consumption when the computer is not in use
This operating manual contains important information you require to start up and run your LCD monitor.
This specification defines the requirements for the 24″MICROPROCESSOR based Multi-mode supported high
resolution color LCD monitor. This monitor can be directly connected to general 15-pin VGA connector and 19-pin
HDMI connector, also supports VESA DPMS power management and plug & play function.
Additional information
Due to the nature of liquid crystal display (LCD) technology, the picture resolution is always fixed. For the best
display performance, please set the display resolution to 1920 x 1080 pixels with an aspect ratio of 2.35:1, 4:3, or
16:9. This is called “Native Resolution” or maximal resolution - that is, the clearest picture. Lower resolutions are
displayed on a full screen through an interpolation circuit. Image blurring across pixel boundaries can occur with the
interpolated resolution depending upon the image type and its initial resolution.
4. Related service information
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
Service Web Site
eSupport URL: http://esupport.benq.com

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5. Product Overview
5.1 Monitor Specifications
Display
Backlight type LED
Size 24″
Resolution 1920 x 1080
Brightness (cd/m2) (typical) 250nits
Contrast ratio 3000:1
Dynamic Contrast Ratio 20M:1
Response time 25ms
Color depth/colors 8bits
Viewing angle (up/down/ left/right) 178/178/178/178 degrees
TV tuner system
Analog PAL/SECAM
Digital DVB-T/C
Video
Senseye • Noise reduction • Flesh tone • ACE •
Dynamic backlight
Aspect ratio • Normal (4:3) • Zoom1 • Zoom2 (2.35:1) •
Wide (16:9) • Panorama
MPEG Noise Reduction Yes
24P True Cinema (no frequency doubling) Yes
Audio
Sound mode
• Standard
• Music
• Cinema
• Speech
• User
Speaker output 5W x 2
Surround system SRS Trusurround HD
Steady Sound Yes
Features
USB multimedia playback • JPEG
• MP3 • MPEG-1,2,4 • H.264
HDMI CEC Yes
Teletext 1000 pages
Intelligent Shut Down Yes
Time-Shift Yes
Sleep Timer Yes
Clock Yes
Parental Yes
MHEG-5 Yes
Stand tilt/swivel Tilt only (-7 ~ 17 degrees)

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Input terminals
RF tuner 1
HDMI 2
Composite 1
Component 1
S-Video 1
SCART 1
D-sub (VGA) 1
Common Interface 1
USB 1
PC Audio In 1
Output terminals
Video out No
SPDIF out 1
Headphone jack 1
Power
Power input 100 ~ 240 V
Power consumption <60W
Standby mode <0.5W
Dimensions
Dimensions with stand (W x H x D mm) 587.3mm (W) x 424.7mm (H) x184.9mm (D)
Dimensions without stand (W x H x D mm) 587.3mm (W) x 369.9mm (H) x 45.8mm (D)
Weight with stand (Kg) 6kg
Weight without stand (Kg) 4.3kg

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5.2 Packing
When packing the monitor into the carton, please follow the pictures as below.
1. Using the EPE bag to pack the monitor without base
2. Using the EPS to pack the monitor

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3. Putting the power cord, remote control, screws, battery, and user manual in the position as the picture shows
below.
User manualThe remote control and screws
The battery
The power cord

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5.3 Customer Acceptance
E24-5500 (AUO Panel) LCD TV Customer Acceptance Criteria
1.0 SCOPE
This document establishes the general workmanship standards and functional Acceptance criteria for LCD TV
model SV4231 Produced by AUO 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 Major defective
A major defective contains one or more defects and may also contain minor defects but contains no critical defect.
6.2 Minor defective
A minor defective contains one or more minor defects but contains no critical and major defects.
7.0 EXPRESSION OF DEFECTIVES
Number of defects
Percent of defects = ------------------------------------------------ X 100%
Number of products inspected
8.0 INSPECTION STANDARD
Unless otherwise specified, the inspection standard will be defined by MIL- STD-105E (ISO-2859), SINGLE

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SAMPLING PLAN. Level Ⅱis in use all the time, inspection levels are normal, reduce and tighten.
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: 0.65 AQL
Minor Defective: 1.5 AQL
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:
. Cold set (switch off for at least 2 hours)
. Nominal mains voltage
. Environmental illumination variable from 500 to 800 Lux (300-500 Lux in Normal I Area)
. Temperature: 24±2℃
. Warm up time: 30minutes minimum.
. Visual inspection shall be down with the distance from eyes to the sample 45 cm.
. Display mode: Primary mode SXGA 60Hz
11.0 TEST EQUIPMENTS
11.1 BenQ PCs with BenQ display adapter or other specific display adapter, which is agreed upon by both parties
11.2 Test program by AUO
11.3 Power saving test tool
11.4 Minolta color analyzer (CA-210)
11.5 Pattern Generator: Chroma
11.6 Fluke or TV signal
11.7 DVD player
11.8 Speaker

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Level 1 Cosmetic / Appearance / Alignment Service
Visual Inspection & Cleaning
Item Description
ID
SPEC
Remark
1
Bezel printing
Offset < =0.2mm
Tilt(θ) <= 0.2mm
Offset include
X/Y axis
2
Bezel printing
Offset < =0.2mm
Tilt(θ) <= 0.2mm
Offset include
X/Y axis
3
Component Mylar printing
Offset < =0.2mm
Tilt(θ) <= 0.2mm
Offset include
X/Y axis

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4
Rear cover printing
Offset < =0.2mm
Tilt(θ) <= 0.2mm
Offset include
X/Y axis
5
The height difference with left and right side
5 ARAL
6
machines Twist specifications
3 RL 
7
Black side specifications
Shift Tolerance
2.1
2.1
2.1
''



DB
CA
CA
Tilt
0.1
0.1
0.1
0.1
'
'
'
'




DD
BB
CC
AA

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8
The gap of the Bezel and Panel
0.1

A
The Gap of the
panel and
bezel must be
symmetrical.
the difference
<= 0.5mm
9
The gap of the Bezel and rear cover
specification A = 0.5
3.0
1.0


AA
10
The STEP of the Bezel and rear cover
5.0
3.0


AA
11
The gap of the Bezel and decorations
ID SPEC Gap = 0.2 mm
2.0
2.0


AA

18
12
The STEP of the Bezel and decorations
ID SPEC = 0.0
3.0
1.0


AA
The compages
accords to
bezel template
as a
benchmark.
13
The gap of the Bezel OSD and rear cover
ID SPEC ＝0.5 mm
2.0
15.0


AA
14
The step of the Bezel OSD and rear
cover
2.0
2.0


AA
The compages
accords to
bezel template
as a
benchmark.
After
compages the
rear cover is
under the
bezel.
15
The gap of the OSD BTN and bezel
ID SPEC ＝0.3 mm
15.0
15.0


AA

19
16
The STEP of the OSD BTN and bezel
ID SPEC = 1.2 mm
2.0
2.0


AA
The height of
the key-press
and bezel
must be evenly
when
assembled the
key-press.
17
The gap of the Rear cover VESA Hole
position
4.0 RL
4.0 BT
18
The gap of the Mylar and rear cover
compages
3.0 RL AA
3.0 BT AA
19
The gap of the tuner connector and rear
cover
7.0 RL AA
7.0 BT AA
Cable can't
Insert no
bottom

20
20
The gap of the component connector and
rear cover
7.0 RL AA
7.0 BT AA
Cable can't
Insert no
bottom
21
The gap of the Scart Connector and rear
cover
7.0 RL AA
7.0 BT AA
Cable can't
Insert no
bottom
22
The gap specification of the S-Video /
Audio in and rear cover
7.0 RL AA
7.0 BT AA
Cable can't
Insert no
bottom
23
The gap specification of the HDMI and
rear cover
7.0 RL AA
7.0 BT AA
Cable can't
Insert no
bottom