Acer SG V243H Schematic

Acer V243H

Service Guide

Service Guide Version and Revision

Version Release Date Revision History Customer model TPV model

A00 Apr.-16-2009 Initial Release V243H TK9AMAD8YBAYDN

Transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in

any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without

the prior written permission of Acer Incorporated.

Disclaimer

The information in this guide is subject to change without notice. Acer Incorporated makes no representations or

warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranties

of merchantability or fitness for any particular purpose. Any Acer Incorporated software described in this manual is

sold or licensed "as is". Should the programs prove defective following their purchase, the buyer (and not Acer

Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any

incidental or consequential damages resulting from any defect in the software.

Intel is a registered trademark of Intel Corporation.

Pentium and Pentium II/III are trademarks of Intel Corporation.

Other brand and product names are trademarks and/or registered trademarks of their respective holders.

Trademarks

Acer is a registered trademark of Acer Incorporated.

All other trademarks are property of their respective owners.

Conventions

The following conventions are used in this manual:

Screen messages Denotes actual messages that appear on screen.

Note Gives bits and pieces of additional information related to the current topic.

Warning Alerts you to any damage that might result from doing or not doing specific actions.

Caution Gives precautionary measures to avoid possible hardware or software problems.

Important Remind you to do specific actions relevant to the accomplishment of procedures.

Preface

Before using this information and the product it supports, please read the following general information.

1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION decided

for Acer's "global" product offering. To better fit local market requirements and enhance product competitiveness,

your regional office may have decided to extend the functionality of a machine (e.g. add-on card, modem, or extra

memory capability). These LOCALIZED FEATURES will NOT be covered in this generic service guide. In such

cases, please contact your regional offices or the responsible personnel/channel to provide you with further

technical details.

2. Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on

your regional web or channel. If, for whatever reason, a part number change is made, it will not be noted in the

printed Service Guide. For ACER-AUTHORIZED SERVICE PROVIDERS, your Acer office may have a

DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list

provided by your regional Acer office to order FRU parts for repair and service of customer machines.

Warning: (For FCC Certified Models)

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to

Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in

a residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installed

and used in accordance with the instructions, may cause harmful interference to radio communications. However,

there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful

interference to radio or television reception, which can be determined by turning the equipment off and on, the user

is encouraged to try to correct the interference by one or more of the following measures:

1. Reorient or relocate the receiving antenna.

2. Increase the separation between the equipment and receiver.

3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

4. Consult the dealer or an experienced radio/TV technician for help.

Notice:

1. The changes or modifications not expressly approved by the party responsible for compliance could void the

user's authority to operate the equipment.

2. Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission limits.

3. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modification to this

equipment. It is the responsibility of the user to correct such interference.

As ENERGY STAR

Partner our company has determined that this product meets the ENERGY STAR

guidelines for energy efficiency.

Warning:

To prevent fire or shock hazard, do not expose the monitor to rain or moisture. Dangerous high voltages are present

inside the monitor. Do not open the cabinet. Refer servicing to qualified personnel only.

Precautions

z Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in

a wet basement.

z Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and

cause serious damage to the appliance. Use only a trolley or stand recommended by the manufacturer or sold

with the monitor. If you mount the monitor on a wall or shelf, uses a mounting kit approved by the manufacturer

and follow the kit instructions.

z Slots and openings in the back and bottom of the cabinet are provided for ventilation. To ensure reliable

operation of the monitor and to protect it from overheating, be sure these openings are not blocked or covered.

Do not place the monitor on a bed, sofa, rug, or similar surface. Do not place the monitor near or over a radiator

or heat register. Do not place the monitor in a bookcase or cabinet unless proper ventilation is provided.

z The monitor should be operated only from the type of power source indicated on the label. If you are not sure of

the type of power supplied to your home, consult your dealer or local power company.

z The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit

only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug,

have an electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the

safety purpose of the grounded plug.

z Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect the

monitor from damage due to power surges.

z Do not overload power strips and extension cords. Overloading can result in fire or electric shock.

z Never push any object into the slot on the monitor cabinet. It could short circuit parts causing a fire or electric

shock. Never spill liquids on the monitor.

z Do not attempt to service the monitor yourself; opening or removing covers can expose you to dangerous

voltages and other hazards. Please refer all servicing to qualified service personnel

z To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate

configured receptacles marked between 100 - 240V AC, Min. 5A.

z The wall socket shall be installed near the equipment and shall be easily accessible.

Special Notes on LCD Monitors

The following symptoms are normal with LCD monitor and do not indicate a problem.

Notes

z Due to the nature of the fluorescent light, the screen may flicker during initial use. Turn off the Power Switch and

then turn it on again to make sure the flicker disappears.

z You may find slightly uneven brightness on the screen depending on the desktop pattern you use.

z The LCD screen has effective pixels of 99.99% or more. It may include blemishes of 0.01% or less such as a

missing pixel or a pixel lit all of the time.

z Due to the nature of the LCD screen, an afterimage of the previous screen may remain after switching the image,

when the same image is displayed for hours. In this case, the screen is recovered slowly by changing the image

or turning off the Power Switch for hours.

Table Of Contents

Chapter 1 Monitor Features ………………………………………… 7

Chapter 2 Operating Instructions ……………………………………… 21

Introduction ……………………………………… 7

Electrical Requirements ……………………………………… 8

LCD Monitor General Specification ……………………………………… 9

LCD Panel Specification ……………………………………… 10

Factory Preset Timing ……………………………………… 12

Monitor Block Diagram ……………………………………… 13

Main Board Diagram ……………………………………… 14

Power Board Diagram 15

Software Flow chart ……………………………………… 16

Main Board Layout ……………………………………… 18

Installation ……………………………………… 19

User Controls ……………………………………… 21

Front Panel Controls ……………………………………… 21

eColor Management (OSD) ……………………………………… 22

How to Adjust a Setting ……………………………………… 23

Chapter 3 Machine Disassembly ……………………………………… 28

Chapter 4 Troubleshooting ……………………………………… 32

Chapter 5 Connector Information ……………………………………… 38

Chapter 6 FRU (Field Replacement Unit) List ……………………………………… 39

Chapter 7 Schematic Diagram ……………………………………… 43

How To Optimize The DOS-Mode ……………………………………… 27

Enter into the factory mode ……………………………………… 27

Exploded Diagram ……………………………………… 39

Monitor Features

Chapter 1

Introduction

Scope

This short specification describes the electrical, optical and functional performance requirements for a 63.2cm (23.6”)

TFT LCD color monitor with VGA&DVI compatible interface.

Description

The LCD monitor is designed with the latest LCD technology to provide a performance oriented product with no

radiation. This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop

space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in addition MTBF

target is 50k hours or more.

Chart of V243H

Panel PANEL M240HW01 V00 XM AUO

Signal Interface D-Sub 15pin;DVI 24pin

Sync Type Separate / Compatible

Color Temp User Adjust Support

DDC DDC2B

Speaker Yes

Headphone Jack Yes

Microphone Jack No

USB Hub No

Tilt / Swivel Yes /No

Electrical Requirements of V243H

Standard Test Conditions

All tests shall be performed under the following conditions, unless otherwise specified.

Warm up time

AC supply voltage

Ambient temperature

Humidity

Display mode

e-color mode Set to “User” mode

Contrast control

Color temperature 6500°K

Brightness control The value under user mode

Analog Input signal 700 mVss

Picture position and size Factory preset value,

Viewing angle 90 ° H and V

Viewing distance 40 cm for LCD performance, 20 cm for LCD failures

＞ 30 min.

230V± 5％, 50± 3 Hz

20°C ± 5°C

65% ± 20%

1920 x 1080, 60 Hz, Pixel Clock：148.5MHZ,all white

Set to The value under user mode, which allows that the brightest two of 32 linear distributed gray-scales (0 ～ 700mv) can be distinguished.

Ambient illumination Dark room < 1 cd/m2

Measurement systems

The units of measure stated in this document are listed below:

1 gamma = 1 nano tesla

1 tesla = 10,000 gauss

cm = in x 2.54

Lb = kg x 2.2

Degrees F = [°C x 1.8] + 32

Degrees C = [°F - 32]/1.8

u' = 4x/(-2x + 12y + 3)

v' = 9y/(-2x + 12y + 3)

x = (27u'/4)/[(9u'/2) - 12v' + 9]

y = (3v')/[(9u'/2) - 12v' + 9]

nits = cd/(m2) = Ft-L x 3.426

lux = foot-candle x 10.76

LCD Monitor General Specification

Model name V243H

Driving system TFT Color LCD

Active Area 531.36 (H) x 298.89 (V)

Pixel pitch 0.265(H) x 0.265(V)

LCD Panel

Contrast Ratio 1000 : 1 (typ)

Response time 5ms(Typ.)

Luminance of White 300 cd/m

Separate Sync. H/V TTL

Input

Viewing angle (H)88 (V) 85(Type)(CR>5)

Display Colors 16.7M

Display mode 1920 x 1080 @60Hz

EPA ENERGY STAR®

Contrast control

Power Source

H-Frequency 30kHz – 83kHz

V-Frequency 56-75Hz

ON Mode < 65W

OFF Mode < 1W

Set to The value under user mode, which allows that the brightest two of 32 linear distributed gray-scales (0～ 700mv) can be distinguished.

100 V ~ 240 V，50 ± 3Hz, 60 ± 3Hz

(Typ.)

Operating Temp: 0° to 40°C

Storage Temp: -20° to 60°C Environmental Considerations

Peak surge current < 55A peak at 240 VAC and cold starting

Power line surge No advance effects (no loss of information or defect)

Operating Humidity: 15% to 90%

Storage Humidity: 15% to 90%

Operating Altitude: 12,000 feet

Storage Altitude: 40,000 feet

LCD Panel Specification of V243H

This specification applies to the 24 inch-wide Color a-Si TFT-LCD Module M240HW01.The display supports the Full HD - 1920(H) x 1080(V) screen format and 16.7M colors (RGB 6-bits +Hi-FRC data). All input signals are 2-channel LVDS interface and this module doesn’t contain an inverter board for backlight.

General Specifications

Block Diagram

TFT LCD Module

Electrical Characteristics

Optical Specifications

Factory Preset Timing of V243H

Monitor Block Diagram

The LCD MONITOR will contain a main board, a power board, and a key board which house the flat panel control

logic, brightness control logic and DDC.

The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips

each voltage.

AC-IN

100V-240V

Power Board

CCFL Drive.

Key board

Flat Panel and CCFL backlight

Main Board

DVI Signal

D-SUB Signal

Main Board Diagram

(

)

(

)

EEPROM

M24C04

(U402)

Flash Memory

SST25VF010A

(U402)

Crystal 12MHz

(X401)

Scalar IC TSUMU58EHL-LF-1

(Include MCU, ADC, OSD)

D-Data D-Clock

DVI

Connector

CN102

(U401)

Panel Interface

CN301

H sync

V sync

RGB

D-Sub

Connector

(CN101)

Key control Interface

(CN402)

Power Board Diagram

AC input

Lamp

EMI filter

Bridge Rectifier and Filter

Start Resistor (R904, R905)

PWM Control

(IC901)

Output

Circuit

Transformer

(PT801)

Transformer

Power Switch

(Q901)

Photo coupler

(IC903)

MOSFET

(Q803)

16V

Rectifier diodes

Feedback

Circuit

16V

CN601

Feedback Circuit

PHONEJACK

PWM Control

TA9687GN

(IC801)

Audio Power Amplifier

APA2069JITUL

IC601

ON/OFF

DIM

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