BenQ LCD E24-5500 Service Manual

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)

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

Abbreviations & Acronyms

ADC Analog to Digital Converter

AFC Automatic Frequency Control: control signal used to tune to the correct frequency

BenQ BenQ Corporation

BTSC Broadcast Television System Committee

CPU Central Process Unit

CVBS Composite Video Blanking and Synchronization

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

EEPROM Electrically Erasable and Programmable Read Only Memory

FLASH FLASH memory

G-TXT Green Teletext

HDMI High Definition Multimedia Interface, digital audio and video interface

HP Head Phone

IR Infra-red

I2C Integrated IC bus

LED Light Emitting Diode

LVDS Low Voltage Differential Signal, data transmission system for high

MOSFET Metal Oxide Semiconductor Field Effect Transistor

NC Not Connected

NVM Non Volatile Memory: IC containing TV related data (for example, options)

OSD On Screen Display

PC Personal Computer

PCB Printed Circuit Board (or PWB)

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

SDA Data signal on I2C bus

SDRAM Synchronous DRAM

SW Sub Woofer / Software

THD Total Harmonic Distortion

VGA Video Graphics Array

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.

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

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.

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.

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

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)

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

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

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

below.

User manual The remote control and screws

The battery

The power cord

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

SAMPLING PLAN. Level Ⅱ is 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

Level 1 Cosmetic / Appearance / Alignment Service

Visual Inspection & Cleaning

Item Description

SPEC

Remark

Bezel printing

Offset < =0.2mm

Tilt(θ) <= 0.2mm

Offset include

X/Y axis

Bezel printing

Offset < =0.2mm

Tilt(θ) <= 0.2mm

Offset include

X/Y axis

Component Mylar printing

Offset < =0.2mm

Tilt(θ) <= 0.2mm

Offset include

X/Y axis

Rear cover printing

Offset < =0.2mm

Tilt(θ) <= 0.2mm

Offset include

X/Y axis

The height difference with left and right side

5 ARAL

machines Twist specifications

3 RL



Black side specifications

Shift Tolerance

2.1



Tilt

0.1



The gap of the Bezel and Panel

0.1



The Gap of the

panel and

bezel must be

symmetrical.

the difference

<= 0.5mm

The gap of the Bezel and rear cover

specification A = 0.5

3.0

1.0

 AA

The STEP of the Bezel and rear cover

5.0

3.0

 AA

The gap of the Bezel and decorations

ID SPEC Gap = 0.2 mm

2.0

2.0

 AA

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.

The gap of the Bezel OSD and rear cover

ID SPEC ＝0.5 mm

2.0

15.0

 AA

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.

The gap of the OSD BTN and bezel

ID SPEC ＝0.3 mm

15.0

15.0

 AA

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.

The gap of the Rear cover VESA Hole

position

4.0 RL

4.0 BT

The gap of the Mylar and rear cover

compages

3.0

The gap of the tuner connector and rear

cover

7.0

Cable can't

Insert no

bottom

The gap of the component connector and

rear cover

7.0

Cable can't

Insert no

bottom

The gap of the Scart Connector and rear

cover

7.0

Cable can't

Insert no

bottom

The gap specification of the S-Video /

Audio in and rear cover

7.0

Cable can't

Insert no

bottom

The gap specification of the HDMI and

rear cover

7.0

Cable can't

Insert no

bottom

The gap of the Side HDMI and rear

cover

0.1

4.0

The gap of the Side Headphone and rea

cover

0.1

4.0

0.1

4.0

The gap of the AC-Socket and rear cover

compages

ID SPEC = 0.5 mm

6.0

The STEP of the AC-Socket and rear cover

compages

ID SPEC

E24

1.2mm

2.1

2.0

 AA

Do not see the

internal bracket

The gap of the Hinge Cover and rea

cover

Gap Spec A = 0.15 mm

15.0

15.0

 AA

The Step of the Hinge Cover and rear

cover

Below the template<

0.3

The gap of the aluminum plaque and

stand

Gap Spec A = 0.2 mm

2.0

2.0

 AA

The STEP of the aluminum plaque and

stand

ID SPEC = 0.5 mm

15.0

15.0

 AA

Backward force M

3.05.1



Forward force N

3.05.1



Machine stress shaking seconds. Time = T

)(6 SECT



degrees of pitch and lean back

5.15.15:l

5.15.5:p





eanback

itch

Software/Firmware Upgrade Process

Step 1: Ready for F/W Upgrade

1.1 Change the software file name to ” upgrade.pkg” ,eg:

Before change:

After change:

1.2 Prepare a USB memory (The file system of USB memory must be FAT16 or FAT 32).

1.3 Copy the file (upgrade.pkg) from your computer to the U-disk root path, and remove it from computer’s

USB port!

Note: 1). Note the version of this F/W is V007 before you change the software file name.

2). The software file name must be changed, or TV can’t detect the F/W.

Step 2: F/W Upgrade (There are two methods to upgrade, I will introduce them separately.)

Method 1:

2.1 Plug the USB memory on the USB port on the side I/O port of TV as figure 2.1.

2.2 AC on (Power plug as Figure 2.2)

Figure 2.1 Figure2.2

2.3. After TV monitor AC on, the logo LED color starts to flash as figure2.3, which indicates the TV is upgrading,

forbid to unplug power or U-disk from TV.

Figure 2.3

2.4. When the monitor screen becomes lights, the upgrade is completed. Unplug the U-disk from TV monitor and

press “power” on remote control or right side power button of TV monitor to restart it as figure2.4.

Figure2.4

Step 3: Check the F/W version and reset to default.

3.1 Unplug the U-disk. And press “menu+1999” to enter factory model to check whether the TV present FW

Version is the same as the upgrade FW version. Do as the figure3.1.

Figure 3.1

3.2. Check the F/W version on the second item of the factory mode info as figure3.2.

Do the following steps rapidly:

1. Press “MENU”;

2. Press”1”+”9” +”9” +”9”;

Figure 3.2

3.2 If the FW version is correct, then do factory reset in user menu as figure3.6, else skip to step2 to redo upgrade.

Method 2:

Step1. AC on and turn on TV by remote control or right side “power” button of TV monitor as figure2.1.1.

Figure2.1.1

Step2. Plug U-disk with “upgrade.pkg” file to TV monitor, and it will detect the U-disk as figure2.2.1.

+ 63 hidden pages