Acer AT4220- Manual

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...

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...

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...

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

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...

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

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

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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 ...

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...

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 ...

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...

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...

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.

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...

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...

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...

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

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

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

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

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

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...

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

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

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

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...

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...

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...

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...

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 &#...