Acer AT4220A AT4220A Service Guide
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- Acer AT4220A | AT4220A Service Guide - Page 1
Acer AT4220A 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 TAIWAN - Acer AT4220A | AT4220A Service Guide - Page 2
Revision History Please refer to the table below for the updates of LCD TV AT4220A service guide. Date Chapter Updates II - Acer AT4220A | AT4220A Service Guide - Page 3
© 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 - Acer AT4220A | AT4220A Service Guide - Page 4
in this guide is subject to change without notice. Acer Incorporated makes 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 - Acer AT4220A | AT4220A Service Guide - Page 5
Conventions The following conventions are used in this manual. SCREEN MESSAGES NOTE WARNING CAUTION IMPORTANT Denotes actual messages . Gives precautionary measures to avoid possible hardware or software problems. Reminds you to do specific actions relevant to the accomplishment of procedures. V - Acer AT4220A | AT4220A Service Guide - Page 6
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 - Acer AT4220A | AT4220A Service Guide - Page 7
System Specification Specification LCD Panel • Max. resolution: 1366 x 768 • Display color: 16.7 million colors • Life 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 • - Acer AT4220A | AT4220A Service Guide - Page 8
• 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 - Acer AT4220A | AT4220A Service Guide - Page 9
System Block and Wiring Diagram INVERTER PANEL POWER Module MAIN Board I/O Board A-Tuner AV 1 AV 2 Component1 Component2 SPEAKER IR Receiver Key Board Chapter 1 3 - Acer AT4220A | AT4220A Service Guide - Page 10
LCD Main Board Block Diagram 4 Chapter 1 - Acer AT4220A | AT4220A Service Guide - Page 11
LCD TV Overview AT4220A/AT4220B/AT4220 Front Panel View 1 2 3 4 5 # 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 - Acer AT4220A | AT4220A Service Guide - Page 12
AT4220A Rear Panel View 1 2 34 5 6 7 8 9 # Item 1 Power switch 2 AC-in 3 HDMI 4 VGA-in 5 DVI-D # Item 6 PC Audio-in 7 AV-Audio L/R + COMPONENT 1/2 8 AV-Audio L/R + CVBS 1/2 9 Analog antenna 6 Chapter 1 - Acer AT4220A | AT4220A Service Guide - Page 13
AT4220B Rear Panel View 1 2 3 45 # Item 1 Power switch 2 AC-in 3 HDMI 4 VGA-in 5 PC Audio-in 6 7 8 9 # Item 6 Audio L/R + CVBS + COMPONENT 1/2 7 Audio L/R + CVBS + COMPONENT 1/2 8 Audio L/R + CVBS 1/2 + S-Video 9 Analog - Acer AT4220A | AT4220A Service Guide - Page 14
AT4220 Rear Panel View 1 2 3 45 6 7 8 # Item 1 Power switch 2 AC-in 3 HDMI 4 VGA-in # Item 5 PC Audio-in 6 AV-Audio L/R + CVBS + COMPONENT 7 SCART 8 Analog antenna 8 Chapter 1 - Acer AT4220A | AT4220A Service Guide - Page 15
Remote Control AT4220A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 # 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 - Acer AT4220A | AT4220A Service Guide - Page 16
Press to open or close the Menu. Press to select close caption and text service between CC1, CC2, CC3, CC4, Text1, Text2, Twxt3, Text4. N/A Press . Press to activate Acer Empowering Technology. Press to increase or decrease the volume. Press to sequentially select the TV channel. Switch between PIP - Acer AT4220A | AT4220A Service Guide - Page 17
AT4220B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 # 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 - Acer AT4220A | AT4220A Service Guide - Page 18
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. - Acer AT4220A | AT4220A Service Guide - Page 19
AT4220 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 # 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/ - Acer AT4220A | AT4220A Service Guide - Page 20
-hand corner (mono, stereo, bilingual). Press to increase or decrease the volume. Press to sequentially select the TV channel. 1 2 7 34 56 # Item 1 Color buttons (R/G/Y/B) 2 INDEX 3 SIZE 4 SUBTITLE 5 SUBPAGE 6 HOLD 7 REVEAL Description Operates corresponding button on - Acer AT4220A | AT4220A Service Guide - Page 21
Basic Connection Connecting the Power Cord 1. Connect the AC cord into the AC input on the back of the set. 2. Connect the male plug to the wall outlet as shown. For AT4220A For AT4220B Chapter 1 15 - Acer AT4220A | AT4220A Service Guide - Page 22
For AT4220 Connecting an Antenna/Cable Connect the antenna cable to the appropriate antenna terminal on the back of the TV set as shown below. Getting Started Watching Your TV 1 2 4 1 1. Select the setup language you prefer. 16 1 3 Chapter 1 - Acer AT4220A | AT4220A Service Guide - Page 23
beneath the screen. b. Press the power button, number keys or channel up/down button on the remote control. good 2 Setup Wizard The first time you switch on the TV, the Setup Wizard will guide you to complete the language selection and channel scanning. Press OK key to begin the setup process - Acer AT4220A | AT4220A Service Guide - Page 24
rear of your LCD TV as shown below. For AT4220A Source-IN Y Yellow R Red W White Blue Green S S-video Note: Acer recommends the following - Acer AT4220A | AT4220A Service Guide - Page 25
For AT4220B Y Yellow R Red W White Blue Green 6 6YLGHR Chapter 1 - Acer AT4220A | AT4220A Service Guide - Page 26
For AT4220 Source-IN Y Yellow R Red W White Blue Green Note: Acer recommends the following priority for connection types: HDMI > COMPONENT > SCART > Composite. TV-OUT Note: SCART-out only works with analog - Acer AT4220A | AT4220A Service Guide - Page 27
Connecting a PC or Notebook Computer To display PC output on your TV, please connect your PC or notebook computer to the TV as shown below. For AT4220A Note: For VGA and DVI input, Acer recommends setting your PC's external monitor resolution to 1360 x 768 at 60Hz - Acer AT4220A | AT4220A Service Guide - Page 28
For AT4220B For AT4220 22 Chapter 1 - Acer AT4220A | AT4220A Service Guide - Page 29
source. Press the corresponding button on the remote control to select the correct input source. For AT4220A/AT4220B TV AV COMPONENT PC 1 2 3 4 # Item 1 TV key 2 AV key 3 COMPONENT key 4 PC key For AT4220 Input Button Guide Toggle Analog TV (ATV) between input sources. Toggle AV1, AV2 - Acer AT4220A | AT4220A Service Guide - Page 30
following method to navigate these menus. 1 Press the MENU button on the remote control or the MENU button on the control panel. 2 Select your Adjusting the OSD Settings The OSD can be used for adjusting the settings of your LCD TV. Press the MENU key to open the OSD. You can use the OSD to - Acer AT4220A | AT4220A Service Guide - Page 31
from the OSD. 3. Use the directional keys to navigate the menus. 4. The Channel management menu can be used to set channel skipped, select TV system and scan channels automatically. Adjusting other Options 1. Press the MENU key to bring up the OSD. 2. Using the directional keys, select Options - Acer AT4220A | AT4220A Service Guide - Page 32
menu can be used to adjust the menu language and other important settings. Note: The options available on the OSD may vary depending on the TV signal source. 26 Chapter 1 - Acer AT4220A | AT4220A Service Guide - Page 33
than 2 seconds The Empowering Key brings up the Acer Empowering Technology functions. In TV mode, the choice is between Scenario mode and Favorite the Empowering Key for more than two seconds to open the menu. 2 TV mode Empowering Key settings menu will come out. 3 Use the directional keys - Acer AT4220A | AT4220A Service Guide - Page 34
enjoyment of the following scenario: Standard TV, Movie, Sport, Concert, Game, and User. Pressing the Empowering Key for less than range. Favorite Channel Mode in TV Storing Favorite channels 1 Select your desired channel, then press the MENU key on the remote control. 2 Use the directional - Acer AT4220A | AT4220A Service Guide - Page 35
number key to change channel. There are a total of five slots in which you can store TV programs. On the remote control, if you press the Empowering Key for less than two seconds, the TV will toggle between the five stored TV channels sequentially according to your list of favorites. Chapter 1 29 - Acer AT4220A | AT4220A Service Guide - Page 36
• Press twice to activate picture-by-picture (PBP). • Press three times to activate picture-on-picture (POP). Then, the POP screens will display the TV channel programs one by one. PIP PIP (Picture-in-Picture) Note: The OSD menu is not available in PIP/POP/PBP modes. PBP PBP - Acer AT4220A | AT4220A Service Guide - Page 37
toggle between POP screens. 2. Press the number keys or CH up or down to change TV channel on the active screen. 3. Press the SIZE/MODE key to access the 1+5 or POP Note: In PIP and PBP, the VGA and DVI sources only support input up to 1360 x 768 pixels at 60Hz. For resolution higher than this, - Acer AT4220A | AT4220A Service Guide - Page 38
to change the PIN. If you forget your PIN, please enter 6163 to reset. If you want to lock your TV, please follow the steps below. 1. Press the MENU key on the remote control to bring up the OSD. 2. Use the directional keys to navigate to the Settings menu. Then select Lock - Acer AT4220A | AT4220A Service Guide - Page 39
(Kg) Weight (lbs) Wall mounting Analog TV system TV color system Sound system Stereo system Closed caption V-chip Analog TV-tuner quantity Terminal Analog tuner in AV1 AV2 COMPONENT1 COMPONENT2 HDMI DVI VGA PC audio-in Audio system Speaker AT4220A 1366 x 768 500 nits 1200/1 16.7 million H: 178 - Acer AT4220A | AT4220A Service Guide - Page 40
60.2 - 75 - MAC Power Saving While VGA is selected to input, this LCD TV is equipped with a power management according to VESA DPMS. There is a delay of to another can be instantaneous. The recovery from off-state requires no manual power on. Mode Power-On Stand-by Suspend Off-state Power off - Acer AT4220A | AT4220A Service Guide - Page 41
is valid over the specified voltage and frequency range. Power consumption is measured from AC source. There are no power saving modes for TV, AV1, AV2, COMPONENT 1 and 2, DVI and HDMI inputs. Performance Specifications The performance is checked at 25oC environment. White Balance and Uniformity Set - Acer AT4220A | AT4220A Service Guide - Page 42
shall be fused and become electrically open as a result of an unsafe current condition. This fuse is inside the power supply converter and is not user replaceable, and must be returned for replacement. This fuse shall be well-selected to handle inrush current for all combinations of line voltage and - Acer AT4220A | AT4220A Service Guide - Page 43
measurable degradation in performance or detectable mechanical or cosmetic damage. Filter: 330 Hz Dropping way: 1 corner, 3 edges, 6 flats Dropping height: see the table below Weight(kg) 0~9 9~1 18~27 27~45 45~100 Corner, edge, F,R,Btm(cm) 76 61 46 31 25 L,R,Up side(cm) 76 61 46 20 15 Chapter - Acer AT4220A | AT4220A Service Guide - Page 44
1 HDMI AV2 AV1 TV DVI VGA Component 2 Component 1 HDMI AV2 AV1 TV Main Sub TV X X X X X AV1 X X X X X AV2 X X X X X HDMI X X X X X Component 1 X X X X X Component 2 X X X X X VGA O O O O O DVI X X X X X O : support X: not support POP(1+5,1+12) Main - Acer AT4220A | AT4220A Service Guide - Page 45
procedures on how to disassemble the AT4220A for maintenance and troubleshooting. To disassemble the TV, you need the following tools: against electric shock and must not touch the drive circuit portion and metallic part of module within 10 minutes. The capacitors in the drive circuit portion remain - Acer AT4220A | AT4220A Service Guide - Page 46
Disassembly Procedures 1. Release the four screws securing the TV Stand. 2. Then remove the TV Stand as the arrows indicate. 3. Release the two screws holding the TV Stand cover. 4. Then remove the TV Stand cover. 5. Release the four screws fastening the right speaker. 6. Push the latch as the - Acer AT4220A | AT4220A Service Guide - Page 47
8. Release all the screws marked in red. Then lift the TV back cover as shown. Chapter 2 41 - Acer AT4220A | AT4220A Service Guide - Page 48
9. Release all screws securing the PCB holder. 10. Then remove the PCB holder as the arrows indicate. 42 Chapter 2 - Acer AT4220A | AT4220A Service Guide - Page 49
11. Release the four screws holding the I/O board. 12. Then detach the I/O board as the arrow indicates. 13. At first disconnect all the cables that connect to the main board. 14. Release the four screws fastening the main board then detach the main board. 15. Release the eight screws fastening the - Acer AT4220A | AT4220A Service Guide - Page 50
17. Release the two screws holding the IR board then detach the IR board. 18. Release the three screws holding the button board then detach the function board. 19. Detach function key. 20. Disconnect the LVDS cable and release the four screws holding the PCB tray. 21. Then remove the PCB tray with - Acer AT4220A | AT4220A Service Guide - Page 51
to detach the left inverter bracket and the left inverter board. 26. Release the screws marked in red then remove the right and the left LCD brackets. 27. Release the eight screws holding the - Acer AT4220A | AT4220A Service Guide - Page 52
Board Placement Please refer to this section to reconnect all cables when you do the assembly. 1. Speaker cable connector: The other ends of this cable link to the two speakers. 46 Chapter 2 - Acer AT4220A | AT4220A Service Guide - Page 53
2. LVDS cable connector: The other end of this cable links to the LVDS board. 3. Inverter cable connector: This is a three-end cable. The other two ends link the right inverter and the power board. We define this cable as Inverter R to Power Board to Main Board. Please refer to the photos below. - Acer AT4220A | AT4220A Service Guide - Page 54
4. Main board to power board cable (eight pins and seven pins): The other end of this cable links to the power board. 5. Main board to power board cable (14 pins and 10 pins): The other end of this cable links to the power board too. 6. Main board to function board to IR board cable: The other two - Acer AT4220A | AT4220A Service Guide - Page 55
7. Power board to left inverter board cable: The other end of this cable links to the left inverter board. Please refer to the photos below. Chapter 2 49 - Acer AT4220A | AT4220A Service Guide - Page 56
50 Chapter 2 - Acer AT4220A | AT4220A Service Guide - Page 57
Chapter 3 Troubleshooting Use the following procedure as a guide for Acer LCD TV AT4220A problems. Note: The diagnostic tests are intended to test this model. Non-Acer products, prototype cards, or modified options could occur false errors and invalid system responses. 1. Duplicate symptom and - Acer AT4220A | AT4220A Service Guide - Page 58
Can Not Power on A Power code Plug in? no Check Power code LED Bright? no Replace Power board or Main board Or IO board or All cable / LED Bright Green color ? no LCD Panel no can Display ? END Check Remote control OK and keypad ? NG Replacement Remote control or IR board or - Acer AT4220A | AT4220A Service Guide - Page 59
LCD No Backlight B Inverter power Cable had Plug in no Change Inverter Power Cable LCD Panel Backlight no Bright ? Replacement Power/B LCD Panel Backlight Bright ? no Replacement LCD Panel Inverter /B LCD Panel Backlight no Replacement Main/B Bight END Chapter 3 52 - Acer AT4220A | AT4220A Service Guide - Page 60
Remote Control No Function C Remote Control have battery? Change Battery IR Board Cable plug in Check IR/B cable or Replacement IR/B Cable Press Remote Menu Key OSD can Display? Replacement IR/B Press Remote Menu Key OSD can Display? Replacement M/B END 53 Chapter 3 - Acer AT4220A | AT4220A Service Guide - Page 61
Button Keys No Function D Key Board Cable plug in Check K/B cable or Replacement K/B Cable Press Menu Key check have Function? Replacement K/B Cable Press Menu Key check have Function? Replacement K/B Cable End End Chapter 3 54 - Acer AT4220A | AT4220A Service Guide - Page 62
RF No Display E RF Cable plug in no Check RF cable or Replacement RF Cable Replacement I/O board RF Can Display END no Replacement M/B 55 Chapter 3 - Acer AT4220A | AT4220A Service Guide - Page 63
COMPONENT1 and COMPONENT2 No Display F Component Cable plug in? Check Component cable or Replacement Component Cable Replacement I/O Board Component cat display Replacement M/B Board END Chapter 3 56 - Acer AT4220A | AT4220A Service Guide - Page 64
AV1 and AV2 No Display H CVBS Cable plug in? Check CVBS cable or Replacement CVBS Cable Replacement I/O Board CVBS cat display END Replacement M/B Board 57 Chapter 3 - Acer AT4220A | AT4220A Service Guide - Page 65
Speaker No Sound H Audio R/L source had plug IN? no Check Audio R/L source cable Video can Display ? no Check Video cable or Replacement Video Cable Mute turn off Volume set 50 Speaker R/L cable plug IN? no Check Speaker cable or Replacement Speaker cable Speaker have Sound Output no - Acer AT4220A | AT4220A Service Guide - Page 66
VGA No Display P VGA Cable plug in? Read EDID DATA EDID Data Normal? Check VGA cable or Replacement VGA Cable Write EDID data VGA can display? Replacement M/B END 59 Chapter 3 - Acer AT4220A | AT4220A Service Guide - Page 67
DVI No Display Q DVI Cable plug in? Read EDID DATA EDID Data Normal? Check DVI cable or Replacement DVI Cable Write EDID data DVI can display? Replacement M/B END Chapter 3 60 - Acer AT4220A | AT4220A Service Guide - Page 68
HDMI No Display R HDMI Cable plug in? Read EDID DATA EDID Data Normal? Check HDMI cable or Replacement HDMI Cable Write EDID data HDMI can display? Replacement M/B END 61 Chapter 3 - Acer AT4220A | AT4220A Service Guide - Page 69
HDMI No Sound L HDMI Cable plug in ? Read EDID DATA EDID Data Normal ? Sound output? no Check HDMI cable or Replacement HDMI CABLE no Write EDID data no Replacement Main/B END Chapter 3 62 - Acer AT4220A | AT4220A Service Guide - Page 70
VGA/DVI No Sound M PC/DVI can Display ? Mute turn off Volume set to 50 Audio Line in Cable Plug IN? Sound Normal ? END no Check Video cable or PC or Replacement VGA/DVI cable no Check Line in cable or Replacement Line in Cable no Replacement Main/B 63 Chapter 3 - Acer AT4220A | AT4220A Service Guide - Page 71
COMPONENT No Sound Z Component Cable plug in? Mute turn-off Volume =30 Earphone remove Check Component cable or Replacement Component Cable Component Source can Display? Check Component cable or Replacement Component Cable Component Sound Normal? Replacement IO/B Component Sound Normal? L1 - Acer AT4220A | AT4220A Service Guide - Page 72
AV1/S-Video No Sound 1 AV1/S-Video/R-L Cable plug in? Mute turn-off Volume =30 Earphone remove AV1/S-Video Source can Display? Check Video and R-L cable or Replacement Video or R-L Cable Check Video and R-L cable or Replacement Video or R-L Cable AV1/S-Video Sound Normal? Replacement IO/B AV1/S- - Acer AT4220A | AT4220A Service Guide - Page 73
web or channel. For whatever reasons a part number change is made, it will NOT be noted on the service guide. For Acer authorized service providers, your Acer office may have a different part number code from those given in the FRU list of this printed service guide. You MUST use the local FRU list - Acer AT4220A | AT4220A Service Guide - Page 74
"CABLE ASSY SCART-SCART VA1(20P/ 20P,R3A)" POWER CODE - AUSTRALIA POWCORD(AUST)3P V54AB300012180Q1 1.8M POWER CODE - US POWER CORD SP-305+IS-14SVT 3P 1.8M /Cover/Bracket Assembly FRONT BEZEL ASSY HV4 LCD-BEZEL ASSY BACK COVER ASSY AH4T BACK COVER ASSY Acer Part No. 25.M25V7.001 25.M28V7.001 - Acer AT4220A | AT4220A Service Guide - Page 75
BRACKET - R MAIN PCB TRAY PCB HOLDER - PAL EU PCB HOLDER - NTSC NA PCB HOLDER - PAL AUS WIRE SADDLE CHA-4 WIRE SADDLE MWS-7 FUNCTION KEY LCD LCD TFT 42.0 IN. AU T420XW01 VER0 Speaker SPEAKER ASSY L SPEAKER ASSY R Label POWER LABEL I/O TURNER LABEL -PAL EU I/O TURNER LABEL - NTSC US I/O TURNER LABEL - Acer AT4220A | AT4220A Service Guide - Page 76
SCREW M4*6 P (NI) SCREW M4*22B(BNI+WASHER+SPRING) SCREW T4*12-B(BNI) "NUT IO EA1(MBEA1001,REV3D)" SCREW T3*8-B(BNI) SCREW M3*6-B(BNI) SCREW F3.0*6-B(NI) SCREW M4*6 P (NI) SCREW M4*22-B(BNI+WASHER+SPRING) SCREW T4*12-B(BNI) "NUT IO EA1(MBEA1001,REV3D)" SCREW T3*8-B(BNI) SCREW M3*6-B(BNI) SCREW F3 - Acer AT4220A | AT4220A Service Guide - Page 77
Exploded Diagram of AT4220A Please refer to the following table and exploded diagram. # Partname Description Acer Part No. Q'TY 1 FRONT BEZEL ASSY HV4 LCD-BEZEL ASSY 60.M34V7.001 1 2 LCD TFT 42.0 IN. AU T420XW01 VER0 "LCD(TFT)42"" T420XW01 VER0" 56.M34V7.001 1 3 "CLAMP AUO-R/L "CLAMP AUO - Acer AT4220A | AT4220A Service Guide - Page 78
30 FUNCTION KEY 31 WIRE SADDLE CHA-4 32 WIRE SADDLE MWS-7 33 SCREW T3*12-P (BNI) "FUNCTION KEY HV7E(EBHV7001,REV3A)" "WIRE SADDLE CHA-4 VV3(EBVV3006,REV3A)" "WIRE SADDLE MWS-7 VV3(EBVV3010,REV3A)" SCREW T3*12-P (BNI) 42.M25V7.001 1 42.M03V7.012 1 42.M03V7.013 6 86.M34V7.001 8 71 Chapter 4