Acer AT4250-DTV User manual

Acer AT4250DTV LCD TV
Service Guide
PRINTED IN TAIWAN
Service guide files and updates are
available on the ACER/CSD web. For
more information, please refer to http://
csd.acer.com.tw

II
Revision History
Please refer to the table below for the updates of LCD TV AT4250DTV service guide.
Date Chapter Updates
December 11, 2006 initial release

III
Copyright
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.

IV
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.
Acer is a registered trademark of Acer Incorporated.
Other brand and product names are trademarks and/or registered trademarks of their respective
holders.

V
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 Reminds you to do specific actions relevant to the
accomplishment of procedures.

VI
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. For whatever reason, if 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.

Chapter 1 1
Overview
LCD Panel
•Max. resolution: 1920 x 1080
•20 CCFTs backlight system
•Display area: 42 inches
•Display color: 16.7 million colors
•Input signal: two-channel LVDS
•Contrast ratio: 1200/1 (typical)
•Brightness: 500 Cd/m2(typical)
•Response time: 6.5 ms
•Viewing angle: 88o(L)/ 88o(R), 88o(U)/ 88o(D)
I/O Functions
•21-pin Euro-SCART (RGB) for Video, S-Video, R.G.B. and Audio
•RCA jack (YUV and CVBS) for YPbPr, YCbCr, Video and Audio
•15-pin D-sub for VGA
•19-pin HDMI connector
•DIN45325 (IEC169-2) terminal for TV/CATV input
•DIN45325 (IEC169-2) terminal for DVB-T input
Video Functions
•PAL/NTSC/SECAM video format support
•480i/576i, 480p/576p, 1080i and 720p, 1080p format support
•Built-in Teletext functions
•Built-in dynamic adaptive smoothing filter
•Built-in dynamic temporal frame-filter noise reduction
•Built-in dynamic motion and edge adaptive de-interlacing
•Film mode 3/2 & 2/2 pull down
•Screen display model 16/9 & 4/3 & panorama & zoom
Mechanical
•VESA mounting holes
Multi-Sound System
•NICAM
•FM Stereo (A2)
Power Source
•Input voltage: 90~264V, 47~63Hz
•Input current: 2.71A
•Power consumption: 291W
System Specification
Chapter 1

2Chapter 1
•Stand-by: 5W Max.
Remote Control
•Multi-function remote control
Speaker
•Internal speaker: 10W x 2 stereo, adjustable volume
Others
•On-screen display adjustment function
•ISP (In System Programming) function available for revising driver easily

Chapter 1 3
System Block and Wiring Diagram

4Chapter 1
LCD Main Board Block Diagram