Acer AL2051W Schematic

Acer AL2051W

Service Guide

Service Guide Version and Revision

No. Version Release Date Revision History

1.0

2.0

Dec-15-2005

Jan-04-2006

Initial release

(Draft Version)

Final Version

TPV Model

TA90KAUHKGAEAP

TA90KAUDBGAFACP

Copyright © 2006 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced, 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,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



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

in a wet basement.

 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.

 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.

 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.

 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 adapte r to g round the appliance safely. Do not defeat the safety purpose of the grounded plug.

 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.

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

 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

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

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

 The wall socket shall be installed near the equipment and shall be easily accessible.  For use only with the attached power adapter (Output 12Vdc), which has UL, CSA listed license.

Special Notes On LCD Monitors

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

Notes

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

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

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

 Due to the nature of the LCD screen, an afterimage of the previous screen may remai n after swit ching 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 ……………………………………… 6

Introduction ……………………………………… 7 Electrical Requirements ……………………………………… 8 LCD Monitor General Specification ……………………………………… 9 LCD Panel Specification ……………………………………… 10 Support Timing ……………………………………… 11 Block Diagram ……………………………………… 12 Main Board Diagram ……………………………………… 13 Software Flow chart ……………………………………… 14 Main Board Layout ……………………………………… 16 Front Bezel ……………………………………… 17 Rear Bezel ……………………………………… 18

Chapter 2 Operating Instructions ……………………………………… 19

External Controls ……………………………………… 19 Front Panel Controls ……………………………………… 20 Adjusting the picture ……………………………………… 21 Hot-Key Menu ……………………………………… 24 OSD Message ……………………………………… 24 Logo ……………………………………… 25

Chapter 3 Machine Disassembly ……………………………………… 26

Chapter 4 Troubleshooting ……………………………………… 34

Chapter 5 Connector Information ……………………………………… 40

Chapter 6 FRU (Field Replacement Unit) List ……………………………………… 41

Exploded Diagram

……………………………………… 42

Chapter 7 Schematic Diagram ……………………………………… 46

Main Board ……………………………………… 46 Power/Inverter Board ……………………………………… 53

Monitor Features

Chapter 1

Introduction

Scope

This specification defines the requirements for the 20” MICROPROCESSOR based Multi-mode supported high resolution color LCD monitor . This monitor can be dire ctly connected to general 1 5 pin D-sub VGA connector and 24 pin DVI connector. It also support s VESA DPMS power management and plug & play function. There is a build-in stereo audio amplifier with OSD control to drive a pair of speakers.

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 CR T monitor , it co nsume s less po wer an d gets less weight in addition MTBF target is 50k hours or more.

Chart of AL2051W

Panel

20” AUO M201EW01 V.2

D-SUB

Signal Interface

DVI

Sync Type

Separate / Compatible

Color Temp User Adjust DDC Speaker Headphone Jack

Support DDC2B Yes Yes

Microphone Jack USB Hub Tilt / Swivel

No Not support Yes / No

Electrical Requirements

Standard Test Conditions

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

Ambient light Viewing distance Warm up time

All specifications : Fully functional : 5 seconds

Measuring equipment

Control settings

User brightness control : Set to Factory preset value (cut off raster) User contrast control : T Set to factory preset value, which allows that the brightest two

User red/white balance, Green/white balance and Blue/white balance control :

Power input Ambient temperature

: Dark room (<1cd/m2) : 40 cm for LCD performance, 20 cm for LCD failures

＞30 minutes

: Chroma 7120 signal generator or equivalent, directly

Connected to the monitor under test. Minolta CA100 photometer, or equivalent

of 32 linear distributed gray-scales (0 ～ 700mv) can be distinguished.

: :

In the center (unless otherwise specified)

230V± 5％, 20+

5℃

50±3 Hz

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

Panel type

Display size

Display mode

Pixel pitch

Pixels (H x V)

Pixel clock

Contrast ratio

20.1 inch-wide Color TFT-LCD Module M201EW01.

433.44 (H) x 270.90(V)

VGA : 640 × 480 (60/72/75/85 Hz)

SVGA : 800 × 600 (56/60/72/75/85 Hz)

XGA : 1024 × 768 (60/70/75/85 Hz)

SXGA : 1280 × 1024 (60/75/85Hz) WSXGA: 1680 x 1050 (60Hz)

WSXGA: 1680 x 1050 (75Hz) D-SUB only

0.258 (per one triad) x 0.258

1680(x3) x 1050

202 MHz (Max)

800: 1 (Typ)

Brightness

Response time (Tr/Tf) Display color

Viewing angle Pc interface

Signal connector

Interface frequency

Plug & play

Power Input voltage

300 cd/m2 @6mA (Typ)

16 ms

16.7M colors (RGB 8-bit data)

176°(H)/176°(V) RGB Analog Interface

Digital interface

D-Sub 15pin

DVI-D 24pin

Horizontal Frequency 30KHz ----91KHz

Vertical Frequency 55Hz ------85Hz

VESA DDC2B, VESA DPMS

230V± 5％, 50± 3 Hz

Total output power

Weight

49Watt max.

Unpacked: 5.4 Kg Packed: 7.3 Kg

LCD Panel Specification

LCD Panel Model (AU M201EW01)

 Display Type active matrix color TFT LCD  Resolution 1680 x 1050  Display Dot  Display Area 433.44mm(H) x 270.90mm(V)  Pixel Pitch 0.258mm(H) x 0.258mm(V)  Display Color 16.7M (true)  Lamp Frequency 50kHz(Max.)  Lamp Current 6.0 mArms (typ)  Weight 2950g (typ)

Optical Specifications

The optical characteristics are measured under stable conditions at 25℃:

1680(x3) x 1050

Supported Timing

Support Modes

There will be 20 total support modes to accommodate the above mode and other video modes within the frequency range of the monitor.

Monitor Block Diagram

The LCD monitor will contain a main board, a power board, which house the flat panel control logic, brightness control logic and DDC. The Inverter board will drive the backlight of panel.

(Include: Inverter and

Power Board

adapter board)

AC-IN 100V-240

CCFL Drive.

Main Board

(Include: Audio and Keypad board)

Host Computer

Flat Panel and CCFL backlight

Video signal, DDC

RS232 Connector For white balance adjustment in factory mode

Main Board Diagram

(

)

(

)

(

)

OSD Control

KEY PAD

MCU

W79E632

(U402)

Panel connector

(CN407)

MST9251A-LF-205

(Include: ADC, OSD etc)

(U401)

Frame

Memory

(U303)

EPR_SDA

EPR_SCL

EEPROM

AT24C16AN-10SU-2.7

U403

RXD TXD

D-Sub Connector

(CN101)

DB15_SDA DB15_SCL

EEPROM

M24C02-WMN6TP

U101

RGB

H sync V sync

DVI Video Signal

DVI Connector

(CN102)

DVI_SDA DVI_SCL

M24C02-WMN6TP

EEPROM

U102

Software Flow Chart

Remark:

1) MCU initializes.

2) Is the EEPROM blank?

3) Program the EEPROM by default values.

4) Get the PWM value of brightness from EEPROM.

5) Is the power key pressed?

6) Clear all global flags.

7) Are the AUTO and SELECT keys pressed?

8) Enter factory mode.

9) Save the power key status into EEPROM. Turn on the LED and set it to green color. Scalar initializes.

10) In standby mode?

11) Update the lifetime of back light.

12) Check the analog port, are there any signals coming?

13) Does the scalar send out an interrupt request?

14) Wake up the scalar.

15) Are there any signals coming from analog port?

16) Display "No connection Check Signal Cable" message. And go into standby mode after the

message disappears.

17) Program the scalar to be able to show the coming mode.

18) Process the OSD display.

19) Read the keyboard. Is the power key pressed?

Main Board Layout

Label Part No. Description

CN603 88G 30211K PHONE JACK 5PIN CN602 88G 30214K PHONE JACK 5PIN CN701 88G 3041CE DC JACK 3PIN CN101 88G 35315F H D-SUB 15PIN CN102 88G 35424F H DVI CONNECTOR 24PIN

X401 93G 22 53 CRYSTAL 14.318MHzHC-49U

X402 93G 22 55 H U401 56G 562120 MST9251A-LF-205 U402 56G1125170AC1 W79E632 BY WINBOND

20MHZ/20PF/49US

Front Bezel

External Controls

Item Description Item Description

1. >/ Volume 4. MENU/ENTER

2. </ Volume 5. Auto Adjust Key/Exit

3. Power Key/Power Indicator

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