Acer AT4220 Technical Information

Acer AT4220A/4220B/4220 LCD TVService Guide

4 Chapter 1LCD Main Board Block Diagram

Chapter 1 5LCD TV OverviewAT4220A/AT4220B/AT4220 Front Panel View# Item Description1 Power On/Off Powers on or off the LCD TV.2 Menu key Turns the OSD

6 Chapter 1AT4220A Rear Panel View# Item # Item1 Power switch 6 PC Audio-in2 AC-in 7 AV-Audio L/R + COMPONENT 1/23 HDMI 8 AV-Audio L/R + CVBS 1/24 VGA

Chapter 1 7AT4220B Rear Panel View# Item # Item1 Power switch 6 Audio L/R + CVBS + COMPONENT 1/22 AC-in 7 Audio L/R + CVBS + COMPONENT 1/23 HDMI 8 Aud

8 Chapter 1AT4220 Rear Panel View# Item # Item1 Power switch 5 PC Audio-in2 AC-in 6 AV-Audio L/R + CVBS + COMPONENT3 HDMI 7 SCART4 VGA-in 8 Analog ant

Chapter 1 9Remote ControlAT4220A# Item Description1 POWER Press to turn your TV on/off.2 DISPLAY Press to display input/channel information (dependent

10 Chapter 17 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.

Chapter 1 11AT4220B# Item Description1 POWER Press to turn your TV on/off.2 DISPLAY Press to display input/channel information (dependent on input/sou

12 Chapter 1Teletext9 MENU Press to open or close the Menu.10 TTX/MIX (TELETEXT/MIX)Press to return to the previous channel.11 Directional keys/OKVOL

Chapter 1 13AT4220# Item Description1 POWER Press to turn your TV on/off.2 DISPLAY Press to display input/channel information (dependent on input/sour

IIRevision HistoryPlease refer to the table below for the updates of LCD TV AT4220A service guide.Date Chapter Updates

14 Chapter 1Teletext11 Directional keys/OKVOL (up/down)CH (up/down)N/A12 WIDE Press to toggle scaling mode between 4:3, 16:9, Panorama and Letterbox 1

Chapter 1 15Basic ConnectionConnecting the Power Cord1. Connect the AC cord into the AC input on the back of the set.2. Connect the male plug to the w

16 Chapter 1For AT4220Connecting an Antenna/CableConnect the antenna cable to the appropriate antenna terminal on the back of the TV set as shown belo

Chapter 1 172. Please select country.3. Ensure that your co-axial cables connected correctly before proceeding.4. Scan for analog channels.5. Setup is

18 Chapter 1Connecting External Audio/Video DeviceConnecting a DVD, VCR, STB or Audio/Video EquipmentConnect your DVD player, VCR or audio/video equip

Chapter 1 19For AT4220BYYellowRedWhiteBlueGreenRW

20 Chapter 1For AT4220Note: Acer recommends the following priority for connection types: HDMI > COMPONENT > SCART > Composite.Note: SCART-out

Chapter 1 21Connecting a Camera, Camcorder or Video GameConnect your camera or camcorder to the video/audio ports on the rear of the TV set as shown b

22 Chapter 1For AT4220BFor AT4220

Chapter 1 23Selecting the Input SourceOnce you have connected your antenna or external equipment to the TV, you need to select the correct input sourc

IIICopyrightCopyright© 2006 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored

24 Chapter 1OSD NavigationMany of the advanced settings and adjustments are available through using the OSD (on-screen display) menus, as shown in the

Chapter 1 25general settings, and Empowering Technology. For advanced settings, please refer to following page.Adjusting the Picture Quality1. Press

26 Chapter 1Note: The options available on the OSD may vary depending on the TV signal source.Adjusting the Settings1. Press the MENU key to bring up

Chapter 1 27Empowering TechnologyThe Empowering Key brings up the Acer Empowering Technology functions. In TV mode, the choice is between Scenario mod

28 Chapter 1optimal enjoyment of the following scenario: Standard TV, Movie, Sport, Concert, Game, and User.Favorite Channel Mode in TVPressing the Em

Chapter 1 293 Navigate to a channel slot, use CH up/down button or number key to change channel.There are a total of five slots in which you can store

30 Chapter 1Advanced FeaturesPIP/PBP/POP• Press the PIP/PBP button once to display activate picture-in-picture (PIP).• Press twice to activate picture

Chapter 1 31Note: 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, “Out of

32 Chapter 1Lock TVLocking TV ContentLock TV is a handy feature that can block all TV sources. Lock TV allows you to enter a password and effectively

Chapter 1 33Hardware Specification and ConfigurationElectro/OpticalModel AT4220APanel specificationResolution (pixels) 1366 x 768Brightness (tpe.) 500

IVDisclaimerThe information in this guide is subject to change without notice.Acer Incorporated makes no representations or warranties, either express

34 Chapter 1Firmware SpecificationsPreset Mode for VGA Input16 factory preset modes for VGA inputs are saved during the manufacturing process.Power Sa

Chapter 1 35• Hsync: f < 1KHz, duty cycle > 25%• Vsync: f < 10Hz, duty cycle > 25%The power consumption is valid over the specified voltag

36 Chapter 1Line FuseThe AC input shall be fused and become electrically open as a result of an unsafe current condition. This fuse is inside the powe

Chapter 1 37Vibration TestThe packaged display shall be capable of passing sinusoidal vibration test below.• Test conditions• A duration of 30 minutes

38 Chapter 1Multi PictureWe only support video on graphic (VGA) multi-picture function. The configuration for multi picture is listed and described as

Chapter 2 39General InformationThis chapter contains step-by-step procedures on how to disassemble the AT4220 series for maintenance and troubleshooti

40 Chapter 2Disassembly Procedures1. Release the four screws securing the TV Stand.2. Then remove the TV Stand as the arrows indicate.3. Release the t

Chapter 2 418. Release all the screws marked in red. Then lift the TV back cover as shown.

42 Chapter 29. Release all screws securing the PCB holder.10. Then remove the PCB holder as the arrows indicate.

Chapter 2 4311. 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 cab

VConventionsThe following conventions are used in this manual.SCREEN MESSAGES Denotes actual messages that appear on screen.NOTE Gives bits and pieces

44 Chapter 217. Release the two screws holding the IR board then detach the IR board.18. Release the three screws holding the button board then detach

Chapter 2 4522. Release the five screws securing the right inverter bracket and the inverter board.23. Carefully disconnect the ten inverter backlight

46 Chapter 2Board PlacementPlease refer to this section to reconnect all cables when you do the assembly.1. Speaker cable connector: The other ends of

Chapter 2 472. 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 o

48 Chapter 24. 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 powe

Chapter 2 497. Power board to left inverter board cable: The other end of this cable links to the left inverter board. Please refer to the photos belo

50 Chapter 2

Chapter 3 50Use the following procedure as a guide for Acer LCD TV AT4220 series problems.Note: The diagnostic tests are intended to test this model.

51 Chapter 3SymptomsCan Not Power onCheck Power codePower codePlug in?Replace Power board or Main board Or IO board or All cable/LED Bright?Replacem

Chapter 3 52LCD No BacklightInverter power Cable had Plug inChange Inverter Power CableLCD Panel BacklightBright ?Replacement Power/BReplacement LCD P

VIPrefaceBefore using this information and the product it supports, please read the following general information.1. This Service Guide provides you w

53 Chapter 3Remote Control No FunctionRemote Control have battery?Change BatteryIR Board Cable plug inCheck IR/B cable or Replacement IR/B CablePress

Chapter 3 54Button Keys No FunctionKey Board Cable plug inCheck K/B cable or Replacement K/B CablePress Menu Key check have Function?Replacement K/B C

55 Chapter 3RF No DisplayRF Cableplug inCheck RF cable or Replacement RF CableReplacement I/O boardRF Can Display ENDReplacement M/BRF Cableplug inChe

Chapter 3 56COMPONENT1 and COMPONENT2 No DisplayComponent Cable plug in?Check Component cable or Replacement Component Cable Replacement I/O Board Com

57 Chapter 3AV1 and AV2 No DisplayCVBS Cable plug in?Check CVBS cable or Replacement CVBS Cable Replacement I/O Board CVBS cat displayENDReplacement M

Chapter 3 58Speaker No SoundAudio R/L sourcehad plug IN? Check Audio R/L source cableReplacement IO/B or Speaker Video can Display ?Check Video cable

59 Chapter 3VGA No DisplayVGA Cable plug in?Check VGA cable or Replacement VGA CableRead EDID DATAEDID Data Normal?ENDWrite EDID dataVGA can display?

Chapter 3 60DVI No DisplayDVI Cable plug in?Check DVI cable or Replacement DVI CableRead EDID DATAEDID Data Normal?ENDWrite EDID dataDVI can display?

61 Chapter 3HDMI No DisplayHDMI Cable plug in?Check HDMI cable or Replacement HDMI CableRead EDID DATAEDID Data Normal?ENDWrite EDID dataHDMI can disp

Chapter 3 62HDMI No SoundHDMI Cableplug in ?Check HDMI cable or Replacement HDMI CABLE Read EDID DATAEDID Data Normal ?Write EDID dataSound output? R

Chapter 1 1SpecificationLCD Panel• Max. resolution: 1366 x 768• Display color: 16.7 million colors• Life time: 60,000 hours• Input signal: one-channel

63 Chapter 3VGA/DVI No SoundSound Normal ? Replacement Main/BSound Normal ? Replacement Main/BMMute turn offVolume set to 50 PC/DVI can Display ? Chec

Chapter 3 64COMPONENT No SoundComponent Cable plug in?Check Component cable or Replacement Component CableComponent Sound Normal? Replacement IO/BENDC

65 Chapter 3AV1/S-Video No SoundAV1/S-Video/R-L Cable plug in?Check Video and R-L cable or Replacement Video or R-L CableAV1/S-Video Sound Normal? Rep

Chapter 4 66This section gives you the FRU (Field Replaceable Unit) list in global configurations of AT4220 series. Please refer to this chapter whene

67 Chapter 4PartsPartname Description Acer Part No.AccessoryREMOTE CONTROLLER - EU REMOTE CONTROL EURT54BEACQT1 25.M25V7.001REMOTE CONTROLLER - USA RE

Chapter 4 68STAND ASSY HV4 STAND ASSY 60.M34V7.003STAND COVER "STAND COVER HX4(EAHX4004,REV3B)" 42.M34V7.001STAND BRACKET "STAND BKT HX

69 Chapter 4SCREW M4*6 P (NI) SCREW M4*6 P (NI) 86.M01V7.002SCREW M4*22-B(BNI+WASHER+SPRING)SCREW M4*22-B(BNI+WASHER+SPRING) 86.M34V7.002SCREW T4*12-B

Chapter 4 70Exploded Diagram of AT4220 SeriesPlease refer to the following table and exploded diagram.# Partname Description Acer Part No. Q’TY1 FRONT

71 Chapter 430 FUNCTION KEY "FUNCTION KEY HV7E(EBHV7001,REV3A)"42.M25V7.001 131 WIRE SADDLE CHA-4 "WIRE SADDLE CHA-4 VV3(EBVV3006,REV3A

2 Chapter 1• Power consumption: 291W• Stand-by: 5W Max.Remote Control• Multi-function remote controlSpeaker• Internal speaker: 10W x 2• Amplifier: 10W

Chapter 1 3System Block and Wiring DiagramMAIN BoardSPEAKER IR Receiver Key BoardComponent2 Component1AV 2 AV 1 I/O Board A-TunerINVERTER PANELModule