Acer AL2423 W Service Manual
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Acer AL2423 W Service Manual

Acer AL2423 W Service Manual

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Acer AL2423 W
Service Guide
Service guide files and updates are available on the CSD web: for more
information,
Please refer to
http://csd.acer.com.tw/
100% Recycled Paper
- 1 -

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  • Page 1: Chapter 2 Operating Instrution

    Acer AL2423 W Service Guide Service guide files and updates are available on the CSD web: for more information, Please refer to http://csd.acer.com.tw/ 100% Recycled Paper - 1 -...
  • Page 2 Copyright Copyright © 2003 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.
  • Page 3 Conventions The following conventions are used in this manual: Screen messages Note Warning Caution Important Denotes actual messages that appear on screen Gives bits and pieces of additional information related to the current topic. Alerts you to any damage that might result from doing or not doing specific actions.
  • Page 4 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.
  • Page 5 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.
  • Page 6 PRECAUTIONS l Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, Swimming pool or in a wet basement. l 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.
  • Page 7 SPECIAL NOTES ON LCD MONITORS The following symptoms are normal with LCD monitor and do not indicate a problem. NOTES l 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.

  • Page 8: Table Of Contents

    Table of contents Chapter 1 MONITOR FEATURE … … … … … … … … … … … … … … … … … … … … … … .9 Chapter 2 OPERATING INSTRUTION … … … … … … … … … … … … … … … … … … … … .21 1 Chapter 3 MACHINE ASSEMBLY …...

  • Page 9: Chapter 1 Monitor Feature

    Monitor Feature LCD Panel Input Display Color Maximum Dot Clock ® Max Resolution Plug & Play EPA ENERGY STAY Audio output Input Connector Input Video Signal Screen Size (Active) Power Source Environmental Considerations Driving system TFT Color LCD Size 24" wide Pixel pitch 0.270mm 178°...
  • Page 10 Weight (Net/Gross) Dimensions (W*H*D) Weight (N.W.) Dimensions (W*H*D) External Controls Switch Regulatory Compliance 7.0 kg / 10.7 kg 572 x 454.1 x 296.2 mm (with stand) 8.5kg/12kg(OnlyAL2423Wh/AL2423Wr) 572 x 425.5 x 296.2 mm (with stand)(Only AL2423Wh/AL2423Wr) * Power Switch * MENU / EXIT * <...
  • Page 11 Timings The product has 34 memory modes in total. 26 modes are preset and 8 modes are user definable. MODE NO. RESOLUTION 720 x 400 Dot clock(MHz) 28.321 31.469kHz H-Total ( us ) 31.78(900dots) H-Sync ( us ) 3.813(108dots) H-B-P ( us ) 1.907(54dots) H-Active ( us ) 25.42(720dots)
  • Page 12 75Hz (75) V-Total (ms ) 13.333 (500 lines) 17.78(625 lines) V-Sync ( ms ) 0.080 (3 lines) V-B-P (ms ) 0.427 (16 lines) V-Active ( ms ) 12.80 (480 lines) V-F-P ( ms ) 0.027 ( 1 line ) SYNC. H/V - / - POLARITY SEP .
  • Page 13 60.02kHz H-Total ( us ) 16.66(1312 dots) 15.630 (1688 dots) 12.504 (1688 dots) 14.815(1600 dots) H-Sync ( us ) 1.22 (96 dots) H-B-P ( us ) 2.23 (176 dots) H-Active ( us ) 13.00 (1024 dots) 11.852 (1280 dots) 9.481 (1280dots) H-F-P ( us ) 0.20 (16 dots) 75.03Hz...
  • Page 14 V-F-P ( ms ) 0.017 ( 1 line ) SYNC. H/V + / + POLARITY SEP . SYNC MODE NO. RESOLUTION 1280 x 768 Dot clock(MHz) 102.25 60.289KHz H-Total ( us ) 16.587 (1696dots) 20.959 (1792dots) 17.878 (1904dots) 14.157 (1936dots) H-Sync ( us ) 1.252 ( 128 dots) H-B-P ( us )
  • Page 15 H-Sync ( us ) 1.203 ( 176 dots) H-B-P ( us ) 1.915 (280 dots) 3.319 (112 dots) H-Active ( us ) 11.487 (1680 dots) 25.126 (848 dots) H-F-P ( us ) 0.711 (104 dots) 59.954 Hz V-Total (ms ) 16.679 (1089 lines) 16.667 (517 lines ) V-Sync ( ms ) 0.092 (6 lines) V-B-P (ms )

  • Page 16: Monitor Block Diagram

    Monitor Block Diagram Page 4 03. Graphic Inputs RED+ RED- GREEN+ GREEN- BLUE+ BLUE- VGA_SCL VGA_SDA VGA_CAB PROJECT : WDTB PROJECT : Title Title Title 02. Top Level 02. Top Level 02. Top Level Size Size Size Document Number Document Number Document Number WDTB SCHEMATIC1...
  • Page 17 PCB CONDUCTOR VIEW Main Board - 17 -...
  • Page 18 - 18 -...
  • Page 19 Power Board - 19-...
  • Page 20 Button board - 20 -...

  • Page 21: Operating Instructions

    OPERATING INSTRUCTIONS Front Panel Definition This Section defines the front panel User Interface for Led Indictor and Key function. Key Definition: There are five keys defined in this system and described bellows. External controls Auto Minus / Plus </> functions Power If the OSD is active, press Auto to exit a selection in the OSD.
  • Page 22 OSD menu Contrast: This adjusts dark and light shades of color relative to each other. Brightness: This adjusts the brightness of the picture on the screen. Focus: This removes any horizontal distortion and makes the picture clear and sharp. Clock: If there are any vertical stripes seen on the background of the screen, this renders them less noticeable by minimizing their size.
  • Page 23 Language for Asia: Select the OSD menu language. Select from English, German, Spanish, Simplified Chinese, Traditional Chinese, French, Italian, and Japanese. Language for EMEA: Select the OSD menu language. Select from English, German, Spanish, Russia, Nederlands, French, Italian, and Finnish. OSD Settings: This changes the position of the OSD window on the screen and the staying time.
  • Page 24 Information: This shows information about the screen. Reset: Resets all settings to default levels. Exit: Exit from OSD.
  • Page 25 Factory Mode You can entry into factory mode when press "Auto" and then press"Power" Key(LED light),it is successful if Power LED Light is amber. Factory1 Adjustment Reset: Resets all settings to default levels. Factory 2 Adjustment This page only visible in factory mode AUTO BURN : Use the chip set internal pattern for hot Use the chip set internal pattern for hot...
  • Page 26 LED Definition The system equips one dual color (blue/amber) led to indict system status and defined as bellows : LED Color Green Amber Dark 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 &...
  • Page 27 THIS MONITOR WILL APPEAR TO BE NON- FUNCTIONAL IF THERE IS NO VIDEO INPUT SIGNAL. IN ORDER FOR THIS MONITOR TO OPERATE PROPERLY, THERE MUST BE A VIDEO INPUT SIGNAL. This monitor meets the Green monitor standards as set by the Video Electronics Standards Association(VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK).

  • Page 28: Chapter 3 Machine Assembly

    Machine assembly This chapter contains step-by-step procedures on how to assemble the monitor for maintenance and trouble shooting NOTE : 1. The screws for the different components vary in size. During the disassembly process, group the screws with the corresponding to avoid mismatch when putting back the components. 2.
  • Page 29 Real View : Top View : - 29 -...
  • Page 30 Side View : ( unit : mm ) - 30 -...
  • Page 31 Exploded view Assembly process Picture Description 1. [GET PCB SHIELD AND PUT IT IN THE MIDDLE OF CONVEYER] 1. [GETM/B ANDM/B CABLE AND PUT ON TOOL ,THEN INSERT INV CABLE ININVERTER/B CONNECTOR. ] 1. GET POWER/B AND INSERT JUMPER IN THE APPOINTED PLACE OF JP10 2.
  • Page 32 1.[FASTEN 3*PCS SCREW(F3*6-T) IN OWER/B] 2. [FASTEN 1*PCS SCREW(M4.0*8-B) IN INV/B] 3. [GET INV MODULE AND PUT ON LINE] 1.[GET INVETOR SUPPORN AND INSERT INV MODULE] 2.[STICK MYLAR 1PCS ON THE POWER/B AS PICTURE SHOWS] 3.[GET CABEL INV/B AND INSERT INV MLDULE ] 1.
  • Page 33 3- 2 1. [TEAR OFF THE INCOMING TAPE] 2. [GET PANEL AND PUT IT ON THE CONVEYER] 1. [STICK CODE*1PCS ON THE APPOINTED PLACE OF PANEL] 2. GET TRAVEL CARD AND SCAN IT AND PANEL CODE] 3. [INSERT CCFT CABEL IN INV MODULE ] - 33 -...
  • Page 34 SCAN IT AND M /B CODE] [LOCK 2PCS (M3*4-I)SCREW IN LEFT BKT] 1. FETCH TRAVEL CARD, TEAR OFF 1*PCS S/N FROM TRAVEL CARD AND PASTE IT ON THE PANEL BACK,THEN SCAN S/N AND PANEL CODE 2. GET LEFT BKT AND LOCK 2*PCS SCREW(M3*5-I) TO FASTEN IT AND PANEL [GET POWER /MYLAR AND STICK...
  • Page 35 [LOCK 3*PCS（M3*4-I）IN BEZEL] 2. [INSERT LVDS CABEL IN LCD ANNECTENT] [GET SHIELD AND PUT ON MONITOR] 1. [STICK YELLOW TEYE ON THE LCD ANNECTENT ] 2. [LOCK 4PCS SCREW FIXING SHIELD IN BKT] 1. [GET PANEL-HOOKON AND ASSY MONITOR BOSS] - 35 -...
  • Page 36 1. [LOCK 4PCS(F3*10-B)SCREW FIXING PANEL-HOOKON MONITOR ] 1. [GET THE SPEAK ASSY WITH BEZEL BOSS AND INSERT CABLE SPEAK] 2. [GET BUTTON/B AND CABLE BUTTON THAN INSERT IN BUTTON ANNECTENT] 1. [LOCK 4PCS (F2.5*8-P)SCREW FIXING SPEAK ASSY] 2. [ASSY BUTTON /B WITH BEZEL AND INSERT CABLE BUTTON] - 36 -...
  • Page 37 1＆2 [LOCK 4PCS I/O NUT SCREW VGA ANNECTENT] [CLEAN UP THE CABLE] 1. [GET 2PCS AL FILM AND STICK BKT ] 2. [GET 1PCS AL FILM AND STICK ON THE SHIELD] 1. GET LCD COVER AND INSPECT ITS APPEARANCE 2. ASSEMBLE LCD COVER TO BEZEL - 37 -...
  • Page 38 3. STICK 1*PCS TAPE AT THE APPOINTED PLACE 1. FETCH TRAVEL CARD, TEAR OFF 1*PCS APPOINTED S/N FROM TRAVEL CARD AND PASTE IT ON THE COVER 2. LOCK 2*PCS SCREW (F3*8-B) TO FASTEN BEZEL AND LCD COVER 3. GET STAND NECK AND INSPECT IF IT IS DIRTY AND SCRATCHED,THEN PUT IT IN THE CONVEYER 1.LOCK 4*PCS SCREW (M4*10-B) TO...
  • Page 39 1＆2 - 39 - 1. INSERT VGA CABLE INTO VGA CONNECTOR AND INSERT POWER CORD INTO POWER CONNECTOR 2. GET BASE FIXTRUE AND ASSEMBLE IT TO STAND NECK. 1. INSERT DVI CABLE INTO DVI CONNECTOR AND INSERT POWER CORD INTO POWER CONNECTOR 2.

  • Page 40: Chapter 4 Trouble Shooting

    1. No Power Change Power Board Check Short Of Main Board Change U13,U12 Change X1 or Change U7 or Change U7 RUN Software No Power Check CN7 +12V and +5V Check U13=1.8V U12=3.3V Check X1=14.318MHz Check U8 Pin 1,2,5,6 Clock Check Key Board - 40 -...
  • Page 41 2. Missing Color Change Cable Change R4,R8,R10,U Change U7 or CN5 Cable or Panel Adjustment R/G/B Color Missing Color Check VGA or DVI Cable Check R4,R8,R10 Check CN5 LVDS Signal Check OSD R/G/B Gain - 41 - Change Panel...
  • Page 42 3. Always show “NO SIGNEL” Change Cable VGA Check R4,R8,R10,R20, Change VGA Cable or R4, R8,R10, R20, R21 or U7 “NO SIGNEL” Check VGA or DVI Cable Change U7 - 42 - DVI Check U7 109, 110, 112,113, 117, 118, 120, 121 Change DVI Cable or U7...

  • Page 43: Chapter 5 Connector Information

    Connector Information Phonejack stereo PIN1. AC power cord PIN2. Audio cable PIN3. Audio The PIN assignment of the 15 pin mini D-SUB connector / cable is as follows: : CEE22 typed connector : Line-in receptacle Signal Green Blue No Pin Ground Ground Red Ground Green...
  • Page 44 Signal Signal TMDS data2- TMDS data2+ TMDS data2 shield DDC clock DDC data Not connected TMDS data1- TMDS data1+ PIN Signal Ground (return for +5 V and H/V sync) Hot plug detect TMDS data0- TMDS data0+ TMDS data0 shield TMDS clock shield TMDS clock+ TMDS clock- - 44 -...

  • Page 45: Chapter 6 Fru List

    NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how best to dispose it, or follow the rules set by your regional Acer office on how to return it.
  • Page 47 STANDARD BASE PLATE WDTB GP 37 MF30070FBJ6 SCREW F3.0*7-F(NI)GO 38 MF40160PJ22 SCREW M4.0*16-P(BLACK NI)GP 39 MM4.100B244 SCREW M4.0*10-B BLACK (NYLDK)GP 40 HCWDTB01014 RATING LABEL-EN WDTB GP 41 JXWDTB01014 LCD FILM-EN WDTB GP 42 AAM240M2006 LCD 24'LTM240M2-L02 FOR ACER CON GP - 47- NUIT...
  • Page 48 Part list Above picture show the description of the following component Item Picture - 48 - Description Part No back cover 25WDTBLC001 bezel 34WDTBLB004 base 38WDTBBS006 stand 37WDTBSU007 screw MM40080BBW1...

  • Page 49: Chapter 7 Schematic Diagram

    SCHEMATIC DIAGRAM +12V C206 C206 100UH 100UH RB081L-20 RB081L-20 2200pF/6 2200pF/6 C207 C207 R237 R237 R225 R225 0.1uF /6 0.1uF /6 R224 R224 560/1206 560/1206 13.3K/1% 13.3K/1% 390K/6 390K/6 R223 R223 1K/1% 1K/1% C195 C195 AIC1563 AIC1563 330pF/5% 330pF/5% ADD 12V to 18V 10/14/2005 Add 5V for avoiding lack current 11/2 +3.3_DVDD FB19 L1206...
  • Page 50 DQ_B_[0..15] DQ_B_[0..15] DQ_A_[0..15] DQ_A_[0..15] A[0..10] A[0..10] +3.3_MEM +3.3_MEM_Q IC50TSOPII IC50TSOPII DQ_A_0 DQ_A_15 DQ15 DQ_A_1 DQ_A_14 DQ14 VSSQ VSSQ DQ_A_2 DQ_A_13 DQ13 DQ_A_3 DQ_A_12 DQ12 VDDQ VDDQ DQ_A_4 DQ_A_11 DQ11 DQ_A_5 DQ_A_10 DQ10 VSSQ VSSQ DQ_A_6 DQ_A_9 DQ_A_7 DQ_A_8 VDDQ VDDQ LDQM UDQM CAS#...
  • Page 51 +1.8_DVDD +1.8V_AVDD L1206 L1206 47uF/10V 47uF/10V 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF +3.3_AVDD +3.3_ADCV L1206 L1206 47uF/10V 47uF/10V 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 22uF/10V 22uF/10V Connect SDA to UART_DO, SCL to UART_DI 10/14/2005 UART_DO/BOOT3 UART_DI AMP 640456-4...
  • Page 52 VGA_+5V SCL_VGA VGA_cable_detect VS_VGA HS_VGA SDA_VGA DB15 HD DB15 HD +3.3_AVDD TZMC5V6/NC TZMC5V6/NC TZMC5V6/NC TZMC5V6/NC AGND AGND 100R 1% 100R 1% 33pF/NC 33pF/NC 33pF 33pF ZD5V6 DAN217 AGND AGND Component Component top view top view 100R 1% 100R 1% 33pF/NC 33pF/NC 33pF 33pF...

  • Page 53: Chapter 8 Power Board Information

    Chapter 8 Power Board Current set Information Power Board AS05B560004 Model Name Lamp Curren AS05B560004 AAM240M2006 Samsung LTM240M2-L02 (VA) NO Jump - 53-...

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