Page 2 - Revision History
II Revision History Please refer to the table below for the updates of LCD TV AT4220A service guide. Date Chapter Updates
Page 4 - Disclaimer
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 purpo...
Page 5 - Conventions
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 actio...
Page 6 - Preface
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 requirem...
Page 7 - Specification; LCD Panel; Video Functions; Mechanical; Power Source; System Specification; Chapter 1
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/m 2 (Min) • Response time: AUO typical gray to gray Tr=8ms (Max.) • Viewing angle: 89...
Page 8 - Remote Control; Speaker; Others
2 Chapter 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 dri...
Page 9 - System Block and Wiring Diagram; MAIN Board; SPEAKER; Component1; INVERTER; Module
Chapter 1 3 System Block and Wiring Diagram MAIN Board SPEAKER IR Receiver Key Board Component2 Component1 AV 2 AV 1 I/O Board A-Tuner INVERTER PANEL Module POWER
Page 10 - LCD Main Board Block Diagram
Page 11 - LCD TV Overview
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, function...
Page 21 - Basic Connection; Connecting the Power Cord
Chapter 1 15 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
Page 22 - Connecting an Antenna/Cable
16 Chapter 1 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. Select the setup language you prefer. 1 2 4 1 1 3
Page 24 - Connecting External Audio/Video Device
18 Chapter 1 Connecting External Audio/Video Device Connecting a DVD, VCR, STB or Audio/Video Equipment Connect your DVD player, VCR or audio/video equipment using the SCART port located at the rear of your LCD TV as shown below. For AT4220A Note: Acer recommends the following priority for connectio...
Page 27 - Connecting a Camera, Camcorder or Video Game
Chapter 1 21 Connecting a Camera, Camcorder or Video Game Connect your camera or camcorder to the video/audio ports on the rear of the TV set as shown below. 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. Fo...
Page 29 - Selecting the Input Source
Chapter 1 23 Selecting the Input Source Once you have connected your antenna or external equipment to the TV, you need to select the correct input source. Press the corresponding button on the remote control to select the correct input source. For AT4220A/AT4220B For AT4220 # Item Input Button Guide...
Page 30 - OSD Navigation; Navigating the OSD with the Remote Control; Adjusting the OSD Settings
24 Chapter 1 OSD Navigation Many of the advanced settings and adjustments are available through using the OSD (on-screen display) menus, as shown in the example screenshot below. Basic operations required to navigate these menus (Picture, Audio, Channel management) Navigating the OSD with the Remote...
Page 33 - Empowering Technology; Set-up Empowering Mode; Default Setting in Different Empowering Mode
Chapter 1 27 Empowering Technology The Empowering Key brings up the Acer Empowering Technology functions. In TV mode, the choice is between Scenario mode and Favorite channel. Set-up Empowering Mode To change your Empowering Key’s default setting: Default Setting in Different Empowering Mode Scenari...
Page 36 - Advanced Features
30 Chapter 1 Advanced Features PIP/PBP/POP • Press the PIP/PBP button once to display activate picture-in-picture (PIP). • 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...
Page 38 - Lock TV
32 Chapter 1 Lock TV Locking TV Content Lock TV is a handy feature that can block all TV sources. Lock TV allows you to enter a password and effectively stop anyone without the password from watching TV. If you want to set a personal PIN, please follow the steps below. 1. Press the MENU key on the r...
Page 39 - Hardware Specification and Configuration
Chapter 1 33 Hardware Specification and Configuration Electro/Optical Model AT4220A Panel specification Resolution (pixels) 1366 x 768 Brightness (tpe.) 500 nits Contrast ratio (tpe.) 1200/1 Display color 16.7 million Viewing angle H: 178 degreesV: 178 degrees Response (tpe.) 8 ms (gray to gray) Pow...
Page 40 - Firmware Specifications
34 Chapter 1 Firmware Specifications Preset Mode for VGA Input 16 factory preset modes for VGA inputs are saved during the manufacturing process. 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 30 seconds before...
Page 41 - Performance Specifications; Power Supply Electrical Specifications
Chapter 1 35 • Hsync: f < 1KHz, duty cycle > 25% • Vsync: f < 10Hz, duty cycle > 25% The power consumption 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 H...
Page 42 - Overall Dimension
36 Chapter 1 Line Fuse The AC input 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 ...
Page 43 - Vibration Test; Drop Test
Chapter 1 37 Vibration Test The packaged display shall be capable of passing sinusoidal vibration test below. • Test conditions • A duration of 30 minutes in each orientation for the tested unit • Top and bottom side (z axis) • Left and right side (x axis) • Front and rear side (y axis) Drop Test Th...
Page 44 - Multi Picture
38 Chapter 1 Multi Picture We only support video on graphic (VGA) multi-picture function. The configuration for multi picture is listed and described as the tables below. Main Sub TV AV1 AV2 HDMI Com ponent 1 Com ponent 2 VGA DVI TV X X X X X X O X AV1 X X X X X X O X AV2 X X X X X X O X HDMI X X X ...
Page 45 - General Information; Before You Begin; Machine Disassembly and Replacement; Chapter 2
Chapter 2 39 General Information This chapter contains step-by-step procedures on how to disassemble the AT4220 series for maintenance and troubleshooting. To disassemble the TV, you need the following tools: • Wrist grounding strap and conductive mat for preventing electrostatic discharge • Small P...
Page 46 - Disassembly Procedures
40 Chapter 2 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...
Page 52 - Board Placement
46 Chapter 2 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.
Page 57 - Troubleshooting; Chapter 3
Chapter 3 50 Use the following procedure as a guide for Acer LCD TV AT4220 series 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 obtain the f...
Page 58 - Symptoms; Can Not Power on
51 Chapter 3 Symptoms Can Not Power on Check Power code Power codePlug in? Replace Power board or Main board Or IO board or All cable / LED Bright? Replacement Panel A Replacement M/B END no LED Bright Green color ? Check Remote control and keypad ? OK Replacement Remote control or IR board or Keypa...
Page 59 - LCD No Backlight
Chapter 3 52 LCD No Backlight Inverter power Cable had Plug in Change Inverter Power Cable LCD Panel Backlight Bright ? Replacement Power/B Replacement LCD Panel Inverter /B END LCD Panel Backlight Bright ? LCD Panel Backlight Bight Replacement Main/B Inverter power Cable had Plug in Change Inverter...
Page 60 - Remote Control No Function
53 Chapter 3 Remote Control No Function 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 C Press Remote Menu Key OSD can Display? Replacement M/B END
Page 61 - Button Keys No Function
Chapter 3 54 Button Keys No Function Key Board Cable plug in Check K/B cable or Replacement K/B Cable Press Menu Key check have Function? Replacement K/B Cable End Press Menu Key check have Function? Replacement K/B Cable End D
Page 62 - RF No Display
55 Chapter 3 RF No Display RF Cable plug in Check RF cable or Replacement RF Cable Replacement I/O board RF Can Display END Replacement M/B RF Cable plug in Check RF cable or Replacement RF Cable Replacement I/O board RF Can Display END Replacement M/B E no no
Page 63 - COMPONENT1 and COMPONENT2 No Display
Chapter 3 56 COMPONENT1 and COMPONENT2 No Display Component Cable plug in? Check Component cable or Replacement Component Cable Replacement I/O Board Component cat display END Replacement M/B Board F
Page 64 - AV1 and AV2 No Display
57 Chapter 3 AV1 and AV2 No Display CVBS Cable plug in? Check CVBS cable or Replacement CVBS Cable Replacement I/O Board CVBS cat display END Replacement M/B Board H
Page 65 - Speaker No Sound
Chapter 3 58 Speaker No Sound Audio R/L source had plug IN? Check Audio R/L source cable Replacement IO/B or Speaker Video can Display ? Check Video cable or Replacement Video Cable Speaker R/L cable plug IN? Check Speaker cable or Replacement Speaker cable END Mute turn offVolume set 50 Audio R/L s...
Page 66 - VGA No Display
59 Chapter 3 VGA No Display VGA Cable plug in? Check VGA cable or Replacement VGA Cable Read EDID DATA EDID Data Normal? END Write EDID data VGA can display? Replacement M/B P
Page 67 - DVI No Display
Chapter 3 60 DVI No Display DVI Cable plug in? Check DVI cable or Replacement DVI Cable Read EDID DATA EDID Data Normal? END Write EDID data DVI can display? Replacement M/B Q
Page 68 - HDMI No Display
61 Chapter 3 HDMI No Display HDMI Cable plug in? Check HDMI cable or Replacement HDMI Cable Read EDID DATA EDID Data Normal? END Write EDID data HDMI can display? Replacement M/B R
Page 69 - HDMI No Sound
Chapter 3 62 HDMI No Sound HDMI Cable plug in ? Check HDMI cable or Replacement HDMI CABLE Read EDID DATA EDID Data Normal ? Write EDID data Sound output? Replacement Main/B END HDMI Cable plug in ? Check HDMI cable or Replacement HDMI CABLE Read EDID DATA EDID Data Normal ? Write EDID data Sound ou...
Page 71 - COMPONENT No Sound
Chapter 3 64 COMPONENT No Sound Component Cable plug in? Check Component cable or Replacement Component Cable Component Sound Normal? Replacement IO/B END Component Sound Normal? Z L1 Mute turn-off Volume =30 Earphone remove Component Source can Display? Check Component cable or Replacement Componen...
Page 73 - Chapter 4
Chapter 4 66 This section gives you the FRU (Field Replaceable Unit) list in global configurations of AT4220 series. Please refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization). Please note that WHEN ORDERING FRU PARTS, you should check the most u...
Page 74 - Parts
67 Chapter 4 Parts Partname Description Acer Part No. Accessory REMOTE CONTROLLER - EU REMOTE CONTROL EURT54BEACQT1 25.M25V7.001 REMOTE CONTROLLER - USA REMOTE CONTROLLER (EURT54BCACQT1) 25.M28V7.001 REMOTE CONTROLLER - AUS REMOTE CONTROLLER (EURT54BAACQT1) 25.M38V7.001 Board POWER BOARD "PWR 29...
Page 77 - Exploded Diagram of AT4220 Series
Chapter 4 70 Exploded Diagram of AT4220 Series 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 &#...
