Acer AL2251W Technical Information

Acer AL2251W Service Guide 1

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LCD Panel Specification LCD Panel Model (M220Z1-L01) General Specifications Mechanical Specification 11

Optical Specifications Test Conditions 12

Supported Timing VESA MODES Horizontal Vertical Mode Resolution Total Nominal Frequency+/- 0.5kHzSync Polarity Nominal Freq. +/- 1 Hz Sync Pola

Monitor Block Diagram The LCD MONITOR will contain a main board, a power board, and keypad board which house the flat panel control logic, brightness

Main Board Diagram U402 PM25L010-25 RXD/TXD KEY Control AT24C16 U403 Panel PA 0~9 PB 0~9 CAT24WC08 U407 U401 TSU

Software Flow Chart 1 2NY5Y N 10Y N12Y N 7YN6489141113YN15YN16 1719N 18 Y 3 16

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

Main Board Layout Symbol Description Symbol Description U401 IC TSUMU58WHJ-LF PQFP-128 U702 LM3485 MSOP-8 NS X401 CRYSTAL 14.318MHzHC-49US CN3

Chapter 2Adjusting the viewing angle • For For optimal viewing it is recommended to look at the full face of the monitor, then adjust the monitor’s

Service Guide Version and Revision Version Release Date Revision History TPV model A00 Sep-29-2006 Initial Release TC6MMADKWGAGACP

Rear Bezel Item Description Item Description 1. D-SUB Cable 4. External Adapter 2. DC-Jack Power Cable 5. DVI Cable 3. AC Power Cord 6

Operating Instructions Chapter 2Press the power button to turn the monitor on or off. The other c

Front Panel Control • Power Button: Press this button to turn the monitor ON or OFF. And display the monitor’s state. • Menu / Enter: Activate O

Adjusting the Picture How to Adjust a Setting 1. Press the MENU-button to activate the OSD window. 2. Press <or >to select the desired fun

b. The Description For Control Function 24

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Hot-Key Menu a. Outline b. The Description For Hot-Key Function Item Operation Icon Description Volume When the OSD is closed, press Left or Right

Logo When the monitor is power on, the LOGO will be showed in the center, and disappear slowly. How To Optimize The DOS-Mode Plug And Play Plug &

Machine Disassembly Chapter 3This chapter contains step-by-step procedures on how to assembl

3. Remove the base stand. (Fig 3) 4.Remove the screws to release front bezel. (Fig 4) Fig 3 Fig 4 29

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

5. Remove the hinge cap. (Fig 5) 6. Remove eleven screws to release top cover and bottom cover. (Fig 6) Fig 5 Fig 6 30

7. Remove the main board. (Fig 7) 8. Remove six clamps to release shield and the main board. (Fig 8) Fig 7 Fig 8 31

9. Removefour screws connect with panel to remove the main frame. (Fig 9-10) 10.Remove the screws to remove the inverter board. (Fig 11) Fig 9 Fig

Troubleshooting Chapter 4This chapter provides troubleshooting information for the AL22

2. No Picture The button if under control X601 oscillate waveform is normal Replace U601Replace X601 Measure U201 PIN2=2.5V

3. White Screen White screen NG Measure Q204 base is low level? Replace X601 NG Check Q204 is broken or CN503 solder? NG Check Correspondent co

5. Inverter Board No Backlight 36

6. No Audio 37

Connector Information Chapter 5The following figure shows the connector locations on the monitor:

FRU (Field Replaceable Unit) List Chapter 6This chapter gives you the FRU (Field Replaceable Unit) listing

Preface Before using this information and the product it supports, please read the following general information. 1. This Service Guide provides you

Exploded Diagram (Model: AL2251W) 40

Part List Above picture show the description of the following component. Item Picture Description 1 Hinge Cover 2 Bezel 3 Back Cover 4 Shield

42 6 Panel 7 Power Board 8 Main Board 9 Speakers

Schematic Diagram Chapter 7 Main Board Top VCC12V_AUDIOB55.PA

Power Q701PMBS3904VCC5VVCC5VVCC12V_AUDIOFB701BEAD123 456R70420K 1/10W　C7170.1uFVCC12VL7012.2UHC7060.001uFCN702CONN123456R70222 1/8W　D702SBM84PTAdjB

Input VSIC3140.1uFR320 100 1/10W　D317BAV99312C309 0.047uFC3240.1uFPC5VC312220pFD306MLL5232B 5.6V1 2R321 100 1/10W　CLK_DDCSOG 5C3150.1uFD321BAV99312

Scaler PA5R429 100 1/10W　Q402PMBS3906R42510K 1/10W　SW403SW2413PB2AVDD_18KEY_LEFTKEY_MENUC4560.1uF+C41810uF/16VC4160.1uFR45510K 1/10W　VCC3.3C421 22

Panel Interface RXO1+LVB1P2006.05.03 add the schematicLVA0MLVB0PPB9RXE1-PB0PA9LVA2PPANEL INTERFACEDTSUMU58J FOR ACERA67Thursday, July 20, 2006TitleSi

Audio AUDIO_SDC6130.1uFR6041K 1/10W　C6101uF/25VCN601CONN1234VCC12V_AUDIOR60620K 1/10W　R608 75 1/10W　R60520K 1/10W　FB603 120 OHMOUT_LOUT_RC6030.1u

Power board OP2Q802PMBS3904R814100K 1/10W　C8145pF/3KVC8314.7uF/16VC8290.1uF/25VIC801OZ9938GN12345678 910111213141516DRV1VDDATIMERDIMISENVSENOVPTNC1

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

Table Of Contents Chapter 1 Monitor Features ………………………………………… 6 Introduction ……………………………………… 7 Electrical Requirements ……………………………………… 8

Monitor Features Chapter 1Introduction Scope This specification defines the requirements

Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient li

LCD Monitor General Specification 9