Acer AT2635B Schematic

Acer AT2635B LCD TV

Service Guide

Service guide files and updates are available on
the ACER/CSD web. For more information,
please refer to http://csd.acer.com.tw

PRINTED IN CHINA

Revision History

Please refer to the table below for the updates of LCD TV AT2635B service guide.

Date Chapter Updates

2007/10/22 Chapter 1 ~ 3 1st edition
2007/10/31 Chapter 1 ~ 4 Add chapter 3

II

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.

III

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.

IV

Conventions

The following conventions are used in this manual.

SCREEN MESSAGES Denotes actual messages that appear on screen.

NOTE

WARNING

CAUTION

IMPORTANT

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.

Gives precautionary measures to avoid possible

hardware or software problems.

Reminds you to do specific actions relevant to the

accomplishment of procedures.

V

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.

VI

Chapter 1

System Specification

Specification

LCD Panel

Max. resolution: 1366 x 768

12 CCFTs Backlight system

Display area: 26 inches

Display color: 16.7 M colors

Input Signal: 1-ch LVDS

Contrast ratio: 800:1 ( Typical )

Brightness: 500 Cd/m² ( Typical )

Response Time: 6.5 ms ( Typical )

Viewing angle: 88° ( L ) / 88° ( R ), 88° ( U ) / 88° ( D )

I/O functions

21 pin Euro-SCART ( RGB ) for Video, S-Video, R.G.B. and Audio

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 D-Sub for HDMI

DIN45325 ( IEC169-2 ) Terminal for TV / CATV input

3.5 mm∮Earphone jack for Audio Line input (option )

Video Functions

Support PAL / NTSC / SECAM video format

Support 480i/576i, 480p/576p, 1080i and 720p format

Build in Teletext functions

Build in Dynamic adaptive smoothing filter

Build in Dynamic temporal frame-filtering Noise Reduction

Build in Dynamic motion and edge adaptive De-interlacing

Film mode 3:2 & 2:2 pull down

Screen display model Auto/4:3/16:9/Panorama/Letterbox1,2,3

1 Chapter1

Mechanical

VESA mounting holes

Compatibility

Multi-Sound system

NICAM

FM Stereo ( A2 )

Power Source

Input voltage: 90 ~ 264 V, 47 ~ 63 Hz

Input current: 220Vac/0.87A

Power consumption: 190 Watts

Stand-by: 1 Watts Max.

Remote controllers

Multi-function remote controller

Speaker

Internal speaker: 5 W x 2 stereo, volume adjustable

Others

On screen display adjustment function

ISP ( In System Programming ) function available for revising driver easily

Chapter1 2

System Block & Wiring Diagram

OUTPUT

PANEL

INPUT

Bidirectional

1366x768

System Power

+12V

5VSB

VCC

TMDS

TMDS341A

3:1 MUX

HDMI

HDMI

Single LVDS

MT5371

Scale

R

L

MT8291

ADC & DAC

Audio IIS

TS
FB
ARD
SIF SIF

YPbPr-SCART
YPbPr-AV3

Y/C1
Y/C2

TV_CVBS

CVBS1
CVBS2
CVBS3

PC-RGB

AV3 Audio

DAC Audio R/L

PC Audio

BUFR

SCART-RGB Audio
SCART-YUV Audio

IO_SW2

SW

ARDx2

SW

IO_SW1

FBx2

RGB
YUV

TPA3100D2

Amplifier

AudioOUT

Video OUT

AudioOUT

MT5131
DEMON

FQD1216 MK5

Video OUT

SCART1-RGBSCART2-RGB

PHILIPS

TI

3 Chapter1

Remote Control

Key Functions

Remote Function des cription

Remark (for
R/C for Europe Key Functions
Power Power On/Off
Display Display Channel and Input Source
Mute Mute On/Off
TV TV Turner
SCART SCART1/SCART2

cardreader)

Chapter1 4

AV Composite/Component/HDMI1/HDMI2
PC VGA
Sleep Sleep Timeer Off 15/30/45/60/90/120
Wide Scaling Mode ( 4:3 /16: 9 /Panorama /Letterbox )
Menu Open Menu or leave Menu
Four way direction key
up Navigate up in the OSD or next (sub)page in teletext mode

Navigate down in the OSD or pevious (sub) page in teletext
down
left Navigate left in the OSD
right Navigate right in the OSD
OK Selection Confirm
Channel key
1 Number key 1
2 Number key 2
3 Number key 3
4 Number key 4
5 Number key 5
6 Number key 6
7 Number key 7
8 Number key 8
9 Number key 9
0 Number key 0
Recall Return to previous channel

mode

Enter Enter to confirm channel selection by number key
Channel UP Channel up
Channel Down Channel down
Volume key

NICAM

STEREO Broadcast : Stereo/Mono
BILIGUAL Broadcast : Sound 1 / Sound 2
MONAURAL Broadcast: Mono

FM-FM

STEREO Broadcast: Stereo/Mono
MPX
Volume up Volume up
Volume down Volume down
Teletext Teletext on/off
Index Go to index page (usually page 100)
Subpage Enter/Leave subpage mode

BILINGUAL Broadcast : Sound 1 / Sound 2

Reveal Display Hidden Information

5 Chapter1

Temporarily holds the current teletext page if TEXT on

Hold Froze the picture if TEXT off

Zoom page toggle 1X/2X
Size
Teletext Turn teletext mode on/off
Subtitle Show subtitle on the screen
R Colour button to operate the teletext
G Colour button to operate the teletext
Y Colour button to operate the teletext
C Colour button to operate the teletext

Page select by Up-arrow and Down-arrow

Chapter1 6