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Service Guide Version and Revision Version Release Date Revision History A00 Sep.-22-2008 Initial Release TPV model TARSNDD8WDAYDN ht tp :// ww w. wj el.
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. Disclaimer The information in this guide is subject to change without notice.
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).
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.
………………………………………… 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 Screen Position Adjustment ……………………………………… 20 Operating Instructions
Chapter 1 Monitor Features Introduction Scope This specification defines the requirements for the 20.0” MICROPROCESSOR based Multi-mode supported high resolution color LCD monitor. This monitor can be directly connected to general 15-pin D-sub VGA connector, also supports VESA DPMS power management and plug & play function. 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.
Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Picture position and size Viewing angle AC Supply voltage Ambient temperature Dark room (< 1 cd/m2) 40 cm for LCD performance, 20 cm for LCD failures ＞30 minutes 700 mVss 6500° K The value under user mode Set to factory preset value, which allows that the brightest two of 32 linear distributed gray-scales (0～ 700mv) can be distinguished.
LCD Monitor General Specification 442.8 (W) × 249.075(H) Pixel pitch 0.2768(H) x 0.2768(W) Contrast Ratio 1000 : 1 Response time 5ms Luminance of White 300(Typ.) cd/㎡ Separate Sync. H/V TTL H-Frequency 30kHz – 83kHz V-Frequency 56-75Hz (H)90 (V) 90(Type) Display Colors 16.7M Display mode 1600 x 900 @60Hz ON Mode EPA ENERGY STAR® OFF Mode w. wj Viewing angle t Active Display Area ne Input TFT Color LCD el.
LCD Panel Specification w. wj el.
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Monitor Block Diagram The LCD MONITOR will contain a main board, a power board, an audio 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. B203H+AUDIO: Flat Panel and CCFL backlight Main Board AC-IN 100V-240V el. ne Inverter Board (include adapter) DVI Signal t CCFL Drive. Key board D-SUB Signal w.
Main Board Diagram ne t Panel Interface (CN301) Scalar IC NT68667FG (Include MCU, ADC, OSD) (U401) :// w D-Sub Connector (CN101) tp Crystal 12MHz (X401) ht Flash Memory PM25LV010A-100SCE (U402) ww H sync V sync RGB .w j el.
Software Flow Chart 1 Y 2 3 N N 4 N ne t 5 Y el. 6 w.
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? t 6) Clear all global flags. ne 7) Are the AUTO and SELECT keys pressed? el. 8) Enter factory mode. 9) Save the power key status into EEPROM. Scalar initializes. 10) In standby mode? 11) Update the lifetime of back light. w. wj Turn on the LED and set it to green color.
Description Symbol Description IC NT68667FG QFP-128L CN603 WAFER EH-4 U703 IC AP1117D33L-13 TO252-3L DIODES CN701 WAFER 9P RIGHT ANELE PITCH U103 IC AZC099-04S SOT23-6L CN301 CONNECTOR U104 IC AZC099-04S SOT23-6L X401 U402 IC PM25LV010A-100SCE SOIC-8 CN101 D-SUB 15PIN U403 M24C16-WMN6TP CN102 DVI 24PIN CONN F tp U401 ht Symbol :// ww w. wj el.
Installation To install the monitor on your host system, please follow the steps below: ht tp :// ww w. wj el.
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Chapter 2 Operating Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. • The power cord should be connected. • Connect the video cable from the monitor to the video card. • Press the power button to turn on the monitor position. The power indicator will light up. w. wj el. ne t External Controls Front panel controls 1.
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How To Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities. The DDC2B is a bi-directional data channel based on the I²C protocol. The host can request EDID information over the DDC2B channel.
Chapter 3 Machine Disassembly This chapter contains step-by-step procedures on how to disassemble the monitor for maintenance. Disassembly Procedure w. wj tp :// ww Remove the back cover and bezel. ht 2. el. ne t 1. Remove the hinge assembly.
:// ww w. wj el. ne t 3． Remove the lamp connectors and remove the screws to remove the panel. Put attention to the LVDS cable. ht tp 4. Remove the screws to remove the main board and power board.
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Chapter 4 Troubleshooting This chapter provides troubleshooting information for the B203H: 1. No Power No power Press power key and look if the picture is normal NG ne Reinsert or check the power section w. wj OK el. Please reinsert and make sure the AC of 100-240 is normal t NG Measure U703 Pin2=3.
2. No Picture (LED is orange) No picture NG The button if under control X401 oscillate waveform is normal NG Replace X401 OK OK Check reset circuit of U401 is normal NG Check Correspondent component Measure U703 Pin2=3.3V, Replace U401 el. OK NG w.
3. Panel Power Circuit White screen NG Measure Q302 base is low level? X401 oscillate waveform is normal OK NG Replace X401 ne t OK Check CN301is solder and Q302,Q301 is OK? el. NG NG w. wj Check Correspondent component. Check reset circuit of U401 is normal OK OK ht tp :// ww Replace PANEL Replace U401 33 Check Correspondent component.
4. Key Board OSD is unstable or not working NG Connect Key Board Is Key Pad Board connecting normally? Y ne el. Y NG ht tp :// ww Check Main Board Replace Key Board w.
5. Power Board 1) No power Check CN902 pin4, 5 = 14V NG Check AC line volt 110V or 220V NG Check AC input ne t OK Check the voltage of C905(+) NG Check bridge rectified circuit and F901 circut el. OK NG Check R904, R932, R933, and Change IC901 ww OK w.
2.) No Backlight Check CN902 pin4, 5 = 14V NG OK Check the adapter or MB Check ON/OFF signal NG OK Check Interface board ne t Check IC801 PIN12=12V NG OK el. Change Q808 NG OK w. wj Check the PWM wave from the pin9,10 of IC801 ww Change IC801 Check Q802, Q803 PIN5, 6, 7, 8 have the output of square wave at short time.
Chapter 5 ht tp :// ww w. wj el.
Chapter 6 FRU (Field Replaceable Unit) List This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of B203H. Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization). NOTE: Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on your regional web or channel (http://aicsl.acer.com.tw/spl/).
1 BEZEL L201WA-8ACER1-P1 11 HINGE ASSEMBLY 2 3 POWER LENS KEY BUTTON S1 S2 SCREW,42-D020523 SCREW 4 5 MAINFRAME SHIELD S3 S4 SCREW SCREW,42-D020523 S5 SCREW ht tp :// ww w. wj el.
Part List Above picture show the description of the following component. Item Picture Description Main Frame w. wj el.
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Chapter 7 Schematic Diagram ht tp :// w ww .w j el.
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Key board UDZSNP5.6B 1 add ZD001 and ZD002 for ESD solution LED001 LED 2 3 1 R001 C004 NC ECOLOR AUTO MENU :// w ht CN001 VOL- VOL+ POWER R003 1K 1/16W 5% C007 MENU AUTO 1 3 5 7 9 11 2 4 6 8 10 12 SW001 JB41-03521 tp ECOLOR(GND) 0 V NC VOL+ AUTO CONNECTOR 2K OHM 1/16W C006 C008 NC 0 V ECOLOR LBADC2 VOL- (GND) ww MENU LBADC1 R002 C005 NC .w j CONN C002 C003 NC NC POWER_Key C001 NC 2K OHM 1/16W el.
