Summary of the content on the page No. 1
Acer B243W
Service Guide
1
Summary of the content on the page No. 2
Service Guide Version and Revision Version Release Date Revision History TPV model TK7SMHDBW7AYBC/ A00 Apr.-3-2008 Initial Release TK7SMHDKW7AYBC 2
Summary of the content on the page No. 3
Copyright Copyright © 2008 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 mak
Summary of the content on the page No. 4
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 FE
Summary of the content on the page No. 5
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 th
Summary of the content on the page No. 6
Table Of Contents Chapter 1 Monitor Features ………………………………………… 7 Introduction ……………………………………… 7 Electrical Requirements ……………………………………… 8 LCD Monitor General Specification ……………………………………… 9 LCD Panel Specification ……………………………………… 10 Support Timing ……………………………………… 13 Monitor Block Diagram ……………………………………… 14 Main Board Diagram ……………………………………… 15 Software Flow chart ……………………………………… 16 Main Board Layout ……………………………………… 18 Installation ……………………………………… 19 Attaching/Removing the bas
Summary of the content on the page No. 7
Chapter 1 Monitor Features Introduction Scope 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 D-sub VGA connector and 24-pin DVI connector, also supports VESA DPMS power management and plug & play function. Description The LCD monitor is designed with the latest LCD technology to prov
Summary of the content on the page No. 8
Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Dark room (< 1 cd/m2) Viewing distance 35-50cm Warm up time ＞30 minutes Analog Input signal 700 mVss Control temperature 6500 ° K Brightness control Set to Factory preset value (cut off raster) Set to The value under user mode, which allows that the brightest User contrast control two of 32 linear distributed gray-scales (0 ～ 700m
Summary of the content on the page No. 9
LCD Monitor General Specification Driving system TFT Color LCD Active Display Area 518.4(H) x 324.0(V) Pixel pitch 0.270(H) x 0.270(W) LCD Panel Contrast Ratio 1000 : 1 Response time 5ms Luminance of White 400(Typ.) cd/ ㎡ Separate Sync. H/V TTL Input H-Frequency 30kHz – 80kHz V-Frequency 56-76Hz Viewing angle (H)160 (V) 160(Type) Display Colors 16.7M Display mode 1920 x 1200 @60Hz ON Mode < 118W EPA ENERGY STAR® OFF Mode < 1W Set to factory preset value, which allows tha
Summary of the content on the page No. 10
LCD Panel Specification LTM240CT01 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit. The resolution of a 24.0” is 1920 x 1200 and this model can display up to 16.7 millions colors. General Specifications Mechanical Information 10
Summary of the content on the page No. 11
Electrical Characteristics 11
Summary of the content on the page No. 12
Optical Specifications 12
Summary of the content on the page No. 13
Support Timing VESA MODES Horizontal Vertical Nominal Nominal Nominal Sync Sync Pixel Mode Resolution Total Frequency Freq. Polarity Polarity Clock +/- 0.5KHz +/- 1 Hz (MHz) 640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175 VGA 640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500 640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500 800x600@56Hz 1024 x 625 35.156 N/P 56.250 N/P 36.000 800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000 SVGA 800x600@72Hz 1040 x 666 48.077 P 72.188 P 50.000
Summary of the content on the page No. 14
Monitor Block Diagram The LCD MONITOR will contain a main board, an inverter board, an adapter board, a key board and a USB 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. Flat Panel and CCFL Drive CCFL Backlight Inverter Board RS232 Connector For white balance Adapter Board Main Board adj
Summary of the content on the page No. 15
Main Board Diagram Crystal LCD Interface 24MHZ/30PF/49US (CN703) (X402) MCU Scalar IC MST9200HA-LF-165 Crystal 14.318MHz MTV416GMV (Include ADC, OSD) (X401) (U407) (U403) EPR_SDA EPR_SCL H sync Digital V sync Video Key Board RGB Signal EEPROM Control M24C16 (CN405) (U408) DVI FRAME D-Sub Connector Connector MEMORY (CN401) (U404) (CN402) DB15_SDA, DB15_SCL EEPROM EEPROM M24C02 M24C02 (U401) (U402)
Summary of the content on the page No. 16
Software Flow Chart 1 Y 2 3 N N 4 N 5 Y 6 N 7 8 Y Y 9 N 10 11 Y N N 12 13 Y Y N 14 15 16 Y 17 N 18 19 Y 16
Summary of the content on the page No. 17
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?
Summary of the content on the page No. 18
Main Board Layout Symbol Description Symbol Description CN402 D-SUB 15PIN U403 IC MST9200HA-LF-165 PQFP-208 CN401 DVI 24PIN CONN F U701 IC AIC1084-33PMTR-R AIC CN703 WAFER 30P 2.0MM DIP DUAL ROW U702 IC AIC1084-33PMTR-R AIC CN701 WAFER 14P RIGHT ANGLE PITCH U404 IC EM636165TS-5G 16M TSOPII-50 ETRON CN405 WAFER 6P RIGHT ANGLE PITCH 2.0 U405 IC EM636165TS-5G 16M TSOPII-50 ETRON U407 MTV416GMV U401 M24C02-WMN6TP U402 M24C02-WMN6TP U408 M24C16-WMN6TP X402 24MHZ/30PF/49US X401 XAT01431AF
Summary of the content on the page No. 19
Installation To install the monitor on your host system, please follow the steps below: Steps 1.Connect the video cable A: Make sure both the monitor and computer are switched off. B: Connect the VGA video cable to the computer. C: Connect the digital cable (only for dual-input models). (1) Make sure both the monitor and computer are switched off. (2) Connect one end of the 24-pin DVI cable to the back of the monitor and the other end to the computer's port. 2.Connect the power cord
Summary of the content on the page No. 20
Attaching/Removing The Base Install: Align the base with the stand and push the base towards the top of the monitor, and then rotate the base clockwise. Tighten the screw clockwise. Remove: Reverse the steps to remove the base. Screen Position Adjustment In order to optimize the best viewing position, you can adjust the height/tilt/swivel/pivot of the monitor. Height Adjustment After pressing the top of the monitor, push the lock button towards right, then you can adjust the height
