Acer AT4220A User manual
Acer AT4220A 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 AT4220A service guide.
Date Chapter Updates
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
Specification
LCD Panel
•Max. resolution: 1366 x 768
•Display color: 16.7 million colors
•Life time: 60,000 hours
•Input signal: one-channel LVDS
•Contrast ratio: 1000/1 (Min)
•Brightness: 4000 Cd/m2(Min)
•Response time: AUO typical gray to gray Tr=8ms (Max.)
•Viewing angle: 89o(L)/89o(R), 89o(U)/89o(D)
I/O Functions
•RCA jack (YUV and CVBS) for YPbPr, YCbCr, video and audio
•15-pin D-sub for VGA
•24-pin DVI/HDCP for DVI-D (optional)
•19-pin HDMI connector (optional)
•DIN45325 (IEC169-2) terminal for TV/CATV input
•3.5 mm earphone jack for audio line input
Video Functions
•PAL/NTSC/SECAM video format support
•480i/576i, 480p/576p, 1080i and 720p format support
•Built-in dynamic adaptive smoothing filter
•Built-in dynamic temporal frame-filter noise reduction
•Built-in dynamic motion and edge adaptive de-interlacing
•Screen display model 16:9 / 4:3 / panorama / zoom / PIP / POP
Mechanical
•VESA mounting holes
Multi-Sound System
•MTS (NTSC), FM-FM
Power Source
•Input voltage: 90~264V, 47~63Hz
System Specification
Chapter 1
2Chapter 1
•Power consumption: 291W
•Stand-by: 5W Max.
Remote Control
•Multi-function remote control
Speaker
•Internal speaker: 10W x 2
•Amplifier: 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
M
AIN Board
SPEAKER IR Receiver Key Boar
d
Component2
Component1
A
V 2
A
V 1
I/O Board
A-Tuner
INVERTER PANEL
M
odule
POWER
4Chapter 1
LCD Main Board Block Diagram
Chapter 1 5
LCD TV Overview
AT4220A/AT4220B/AT4220 Front Panel View
# Item Description
1 Power On/Off Powers on or off the LCD TV.
2 Menu key Turns the OSD menu on and off.
3 Channel up/down Channel up: When the OSD is on, functions the same as the Up
arrow.
Channel down: When the OSD is on, functions the same as the
Down arrow.
4 Volume +/- Volume up: When the OSD is on, functions the same as the Right
arrow.
Volume down: When the OSD is on, functions the same as the Left
arrow.
5 Input key When is OSD is on, press this button to confirm selection.
1
2
3
4
5
6Chapter 1
AT4220A Rear Panel View
# Item # Item
1 Power switch 6 PC Audio-in
2 AC-in 7 AV-Audio L/R + COMPONENT 1/2
3 HDMI 8 AV-Audio L/R + CVBS 1/2
4 VGA-in 9 Analog antenna
5DVI-D
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8765 9
Chapter 1 7
AT4220B Rear Panel View
# Item # Item
1 Power switch 6 Audio L/R + CVBS + COMPONENT 1/2
2 AC-in 7 Audio L/R + CVBS + COMPONENT 1/2
3 HDMI 8 Audio L/R + CVBS 1/2 + S-Video
4 VGA-in 9 Analog antenna
5 PC Audio-in
4321
98765
8Chapter 1
AT4220 Rear Panel View
# Item # Item
1 Power switch 5 PC Audio-in
2 AC-in 6 AV-Audio L/R + CVBS + COMPONENT
3 HDMI 7 SCART
4 VGA-in 8 Analog antenna
4321
8765
Chapter 1 9
Remote Control
AT4220A
# Item Description
1 POWER Press to turn your TV on/off.
2 DISPLAY Press to display input/channel information (dependent on input/
source type).
3 MUTE Press to toggle audio on and off.
4 Input buttons (TV/AV/
COMPONENT/PC)
Press to select correct input mode.
5 SLEEP Press to set a time period after which the TV will switch itself to
standby (15, 30, 45, 60, 90 or 120 minutes).
6 Number keys Press to select the TV channel.
1
7
11
2
10
6
3
9
8
4
5
12 13
15 16
17
14
18 19 20 21
10 Chapter 1
7 RECALL Press to return to the previous channel.
8 ENTER Press to confirm channel number selection.
9 MENU Press to open or close the Menu.
10 CC Press to select close caption and text service between CC1, CC2,
CC3, CC4, Text1, Text2, Twxt3, Text4.
11 Directional keys/OK
VOL (up/down)
CH (up/down)
N/A
12 WIDE Press to toggle scaling mode between 4:3, 16:9, Panorama and
Letterbox 1, 2, 3 modes.
13 MTS Press to switch the sound system between stereo, main and SAP.
Information is displayed on the top right-hand corner.
14 e (Empowering
Technology)
Press to activate Acer Empowering Technology.
15 VOL (+/-) Press to increase or decrease the volume.
16 CH (up/down) Press to sequentially select the TV channel.
17 PIP/PBP/POP Switch between PIP/PBP/POP modes.
18 SWAP For PIP/PBP mode: Toggle between the primary and sub-screens.
19 ACTIVE Toggle between primary and sub-screens.
20 POSITION When in PIP mode: Change sub-screen position.
21 SIZE/MODE When in PIP mode: Change sub-screen size. When in POP mode:
Switch POP mode from 1+5 to 1+12.
Chapter 1 11
AT4220B
# Item Description
1 POWER Press to turn your TV on/off.
2 DISPLAY Press to display input/channel information (dependent on input/
source type).
3 MUTE Press to toggle audio on and off.
4 Input buttons (TV/AV/
COMPONENT/PC)
Press to select correct input mode.
5 SLEEP Press to set a time period after which the TV will switch itself to
standby (15, 30, 45, 60, 90 or 120 minutes).
6 Number keys Press to select the TV channel.
7 RECALL Press to return to the previous channel.
8 ENTER Press to confirm channel number selection.
1
7
11
2
10
6
3
9
8
4
5
12 13
15 16
17
14
18 19 20 21
12 Chapter 1
Teletext
9 MENU Press to open or close the Menu.
10 TTX/MIX (TELETEXT/
MIX)
Press to return to the previous channel.
11 Directional keys/OK
VOL (up/down)
CH (up/down)
N/A
12 WIDE Press to toggle scaling mode between 4:3, 16:9, Panorama and
Letterbox 1, 2, 3 modes.
13 MPX Press to select the sound input, displayed in the top right-hand
corner (mono, stereo, bilingual).
14 e (Empowering
Technology)
Press to activate Acer Empowering Technology.
15 VOL (+/-) Press to increase or decrease the volume.
16 CH (up/down) Press to sequentially select the TV channel.
17 PIP/PBP/POP Switch between PIP/PBP/POP modes.
18 SWAP For PIP/PBP mode: Toggle between the primary and sub-screens.
18 ACTIVE Toggle between primary and sub-screens.
20 POSITION When in PIP mode: Change sub-screen position.
21 SIZE/MODE When in PIP mode: Change sub-screen size. When in POP mode:
Switch POP mode from 1+5 to 1+12.
# Item Description
1 Color buttons (R/G/Y/B) Operates corresponding button on the teletext page.
2 INDEX Press to go to the index page.
3 SIZE Press once to zoom teletext page to 2X. Press again to resume.
4 SUBTITLE Press to view subtitles on the screen.
5 SUBPAGE Press to access the teletext’s sub-pages directly.
6 HOLD Press to pause the current teletext page in multi-page viewing
mode.
7 REVEAL Press to reveal hidden teletext information.
3
1
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27
Chapter 1 13
AT4220
# Item Description
1 POWER Press to turn your TV on/off.
2 DISPLAY Press to display input/channel information (dependent on input/
source type).
3 MUTE Press to toggle audio on and off.
4 Input buttons (TV/AV/
SCART/PC)
Press to select correct input mode.
5 SLEEP Press to set a time period after which the TV will switch itself to
standby (15, 30, 45, 60, 90 or 120 minutes).
6 Number keys Press to select the TV channel.
7 RECALL Press to return to the previous channel.
8 ENTER Press to confirm channel number selection.
9 MENU Press to open or close the Menu.
10 TTX/MIX (TELETEXT/
MIX)
Press to return to the previous channel.
1
7
11
2
10
6
3
9
8
4
5
12 13
14 15
14 Chapter 1
Teletext
11 Directional keys/OK
VOL (up/down)
CH (up/down)
N/A
12 WIDE Press to toggle scaling mode between 4:3, 16:9, Panorama and
Letterbox 1, 2, 3 modes.
13 MPX Press to select the sound input, displayed in the top right-hand
corner (mono, stereo, bilingual).
14 VOL (+/-) Press to increase or decrease the volume.
15 CH (up/down) Press to sequentially select the TV channel.
# Item Description
1 Color buttons (R/G/Y/B) Operates corresponding button on the teletext page.
2 INDEX Press to go to the index page.
3 SIZE Press once to zoom teletext page to 2X. Press again to resume.
4 SUBTITLE Press to view subtitles on the screen.
5 SUBPAGE Press to access the teletext’s sub-pages directly.
6 HOLD Press to pause the current teletext page in multi-page viewing
mode.
7 REVEAL Press to reveal hidden teletext information.
3
1
456
27
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2
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