Acer AT4230C Service Manual
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Acer AT4230C Service Manual

Acer AT4230C Service Manual

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Acer AT4230C
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

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  • Page 1 Acer AT4230C 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...

  • Page 2: Revision History

    Revision History Please refer to the table below for the updates of LCD TV AT4220A service guide. Date Chapter Updates January 15, 2007 initial release...
  • Page 3 Copyright © 2007 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,...
  • Page 4 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.

  • Page 5: Screen Messages

    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.
  • Page 6 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...

  • Page 7: Video Functions

    Chapter 1 System Specification Overview LCD Panel • Max. resolution: 1366 x 768 • 20 CCFTs backlight system • Display area: 42 inches • Display color: 16.7 million colors • Input signal: one-channel LVDS • Contrast ratio: 1200/1 (typical) • Brightness: 500 Cd/m (typical) •...
  • Page 8 Compatibility Multi-Sound System • MTS (NTSC), (Stereo/ SAP/ Mono sound system) Power Source • Input voltage: 90 ~ 264V, 47 ~ 63Hz • Input current: 3.47A (Max.) • Power consumption: 347W (Max.) • Stand-by: 3W (Max.) Remote Control • Multi-function remote control Speaker •...

  • Page 9: Main Board

    System Block and Wiring Diagram PANEL INVERTER DVBT-BOARD I/O Board POWER MAIN Board Module A-Tuner D-Tuner AV 1 AV 2 Comconnet1 Comconner2 SPEAKER IR Receiver Key Board HDMI MODULE Chapter 1...
  • Page 10 LCD Main Board Block Diagram Chapter 1...

  • Page 11: Hardware Specification And Configuration

    Hardware Specification and Configuration 1. LCD Panel Specification Panel specification Outline dimension 983.0 (H) x 576.0 (V) x 52.7 (D) Display area 42.02 inch Resolution (pixels) 1366 x 768 Pixel pitch 0.6 (H) x 0.6 (V) mm Pixel arrangement R, G, B vertical stripe Display color 16.7 million Display mode...
  • Page 12 2.2 Video Input CVBS Input Signal Type Analog Polarity Positive Level 1 Vp-p (with Sync.) Impedance Ω +/- 5% Interface RCA jack, yellow color S-Video Input Signal Type Analog Polarity Positive Level Y: 1 Vp-p (with Sync.) C: 0.286 Vp-p Impedance Ω...
  • Page 13 2.4 DVB-T RF Input: Technical Brief for SD DVB-T Module Features Specifications Parameters Terrestrial Input frequency VHF, UHF Band (Full Band) Tuner/Demodulator Standard DVB-T (ETS 300 744) Channel Bandwidth 6 MHz, Taiwan Channel COFDM System 2K, 8K carrier Hierarchical supported Demodulation type QPSK, 16QAM, 64QAM Guard Interval...

  • Page 14: Firmware Specification

    Line fuse The AC input is fused and becomes 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 is selected to handle inrush current for all combinations of line voltage and frequency.
  • Page 15 Preset Horizontal Horizontal Vertical Vertical Pixel Format Standard Mode Frequency (KHz) Polarity Frequency (Hz) Polarity 800 * 600 75 46.87 800 * 600 85 53.67 1024 * 768 60 48.36 1024 * 768 70 56.47 1024 * 768 75 60.02 75.02 1024 * 768 85 68.67...
  • Page 16 5. VESA DDC The VGA/ DVI/ HDMI inputs will be capable of continuously transmitting its Extended Display Indentification (EDID) information using Display Data Channel. It will automatically switch to DDC2 mode if a DDC2 capable host is detected in accordance with the VESA DDC standard. In addition, the display can respond to a request for EDID, to be transmitted using DDC2, level B commands.

  • Page 17: Physical Specification

    6. Factory Mode and Factory Default • Factory mode entrance SOP: press “Volume-“ + “Channel+“ + “Power“ then you can enter the factory mode. • Factory default reset SOP: press “Volume-“ + “Channel-“ + “Menu“ and all data will be recalled. 7.

  • Page 18: Environment Requirements

    8. Environment Requirements +/- 5 for purity, white point, mis-convergence, luminance Operating measurements and white uniformity measurement Operating temperature: C to 40 Operating humidity: 10% to 90% (non-condensing) Storage temperature: C to 60 Shipping temperature: C to 60 Storage and Shipping Storage humidity: 10% to 90% (non-condensing) Shipping temperature:...
  • Page 19 Operating altitude: 0 to 10,000 feet Altitude Shipping altitude: 0 to 40,000 feet Storage altitude: 0 to 40,000 feet Units tested at an altitude up to 12,000 feet must operate at normal conditions without exhibiting abnormal behavior such as arcing or shutdown.
  • Page 20 Chapter 2 Machine Disassembly and Replacement General Information This chapter contains step-by-step procedures on how to disassemble the AT4230C series for maintenance and troubleshooting. To disassemble the TV, you need the following tools: • Wrist grounding strap and conductive mat for preventing electrostatic discharge •...

  • Page 21: Disassembly Procedures

    Disassembly Procedures 1. Release the six screws securing the TV Stand. 2. Then remove the TV Stand as the arrows indicate. 3. Release all the screws marked in red. Then remove the TV back cover. Chapter 2...
  • Page 22 4. Release the two screws fastening the I/O box then you can pull out the I/O box. 5. Release the four screws fastening the HDMI box then you can pull out the HDMI box. 6. Release all screws securing the PCB holder, 14 screws in total. 7.
  • Page 23 8. Release the four screws securing the I/O transfer board and slightly detach the I/O transfer board. 9. Release the two screws holding the HDMI transfer board and slightly detach the HDMI transfer board. Chapter 2...
  • Page 24 10. Disconnect and remove all the cables on the power board and main board and I/O board. 11. Then release the eight screws securing the power board and remove the power board. 12. Release the five screws holding the main board and the I/O board. Then remove the main board and the power board altogether.
  • Page 25 15. Release the three screws holding the button board then detach the function board. 16. Detach function key. 17. Release the two screws holding the IR board then detach the IR board. 18. Release the six screws holding the TV stand bracket then remove the TV stand bracket. 19.
  • Page 26 20. Release the 8 screws marked in red then remove the right and the left LCD brackets. 21. Release the screws holding the LCD then you can remove the LCD. Chapter 2...
  • Page 27 Board and Cable Placement Please refer to this section to reconnect all cables when you do the assembly. 1. LVDS cable 2. Power board to main board to I/O board cable (14 pins/ 10 pins/ 8 pins) 3. Speaker cables: red/blace cable connected to right speaker, white/black connected to left speaker Chapter 2...
  • Page 28 4. Power board to right inverter board to main board cable (14 pins/ 10 pins/ 4 pins) 5. Power board to left inverter board cable (12 pins/ 10pins) Chapter 2...
  • Page 29 6. Audio to main board cable (8 pins/ 7pins) Chapter 2...
  • Page 30 7. Main board to function key board to IR board cable (10 pins/ 9 pins/ 8 pins). The other two ends of this cable link to function key board and IR board. Chapter 2...

  • Page 31: Troubleshooting

    Troubleshooting Use the following procedure as a guide for Acer LCD TV AT4230C 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.
  • Page 32 Symptoms No Power on Power Cord Replacement Power Cable Replacement Power Board Replacement Main Board Replacement Chapter 3...
  • Page 33 LCD Fails LCD No Display LCD No Back Light LCD Cable Inverter Board Replacement Main Board Main Board Replacement Replacement LCD Panel LCD Panel Chapter 3...
  • Page 34 ATV Channel Fails Button Board Replacement I/O Board Replacement Main Board Replacement Chapter 3...
  • Page 35 DDC/ POP PIP Fails Main Board Replacement Chapter 3...
  • Page 36 Remote Control Fails IR board Replacement IR Cable Replacement Main Board Replacement Chapter 3...
  • Page 37 RF No Signal/ HDMI Fails IO Board Replacement Translation Board Replacement Main Board Replacement Chapter 3...
  • Page 38 Unit Hang Up Suddenly Power Board Replacement Main Board Replacement Chapter 3...
  • Page 39 AV1, AV2, AV3 Speaker No Sound Speck Cable Replacement Speaker Replacement Main Board Replacement IO Board Replacement Chapter 3...
  • Page 40 Can Not Enter Factory Mode Button Cable Replacement Button Board Replacement IO Board Replacement Main Board Replacement Chapter 3...
  • Page 41 VGA No Display VGA Cable Replacement EDID CODE Write EDID Replacement Chapter 3...
  • Page 42 HDMI No Display HDMI Cable Replacement EDID CODE Write EDID HDMI BOX Replacement Replacement Chapter 3...
  • Page 43 DVT No Display Cable of DVT Replacement IO BOX Replacement Replacement Translation Board Replacement DTV Board Replacement Cable for DTV\PW Replacement Chapter 3...
  • Page 44 AV(CABS) No Display CVBS cable Replacement IO BOX Replacement Replacement Translation Board Replacement Chapter 3...
  • Page 45 YUV No Display YUV cable Replacement IO BOX Replacement Replacement Translation Board Replacement Chapter 3...

  • Page 46: Fru (Field Replaceable Unit) List

    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 provided by your regional Acer office to order FRU parts for repair and service of customer machines.
  • Page 47 Parts PARTNAME DESCRIPTION ACER PART NO. ACCESSORY REMOTE CONTROLLER - REMOTE CONTROL EURT54B007 25.M4207.001 BOARD FUNCTION BOARD JL7 KEYPAD/B ASSY 55.M25V7.002 IR BOARD JL7 IR/B ASSY(FOR HV7) 55.M25V7.003 POWER BOARD "PWR 291W,DPS-291AP A(90~264VAC)" 55.M34V7.001 CPU BOARD "AD6 CPU/B (DVB-T,TWN) ASSY"...

  • Page 48: Rating Label

    PARTNAME DESCRIPTION ACER PART NO. PCB SHELDING AH4T SHIELDING ASSY 60.M4207.002 PCB CHASSIS "CHASSIS AH4T(FAAH4001,REV3B)" 60.M4207.003 DUMMY IO BOX BRACKET "IO BOX BKT-DUMMY 33.M4207.001 HR7(FBHR7002,REV3C)" DUMMYHDMI IO BRACKET "HDMI IO BKT-DUMMY 33.M4207.002 HR7(FBHR7003,REV3B)" STAND COVER "STAND COVER HX4(EAHX4004,REV3B)" 42.M34V7.001 STAND BRACKET "STAND BKT HX4(FAHX4008,REV3A)"...
  • Page 49 PARTNAME DESCRIPTION ACER PART NO. SCREW M4*22- SCREW M4*22-B(BNI+WASHER+SPRING) 86.M34V7.002 B(BNI+WASHER+SPRING) SCREW F3.0*6-B(NI) SCREW F3.0*6-B(NI) 86.M25V7.002 SCREW T3*12-P SCREW T3*12-P(BNI)(WASHER) 86.M3507.004 SCREW T4*12-B(BNI) SCREW T4*12-B(BNI) 86.M25V7.003 "NUT IO "NUT IO EA1(MBEA1001,REV3D)" 86.M25V7.001 EA1(MBEA1001,REV3D)" SCREW T4*12-B(BNI) SCREW T4*12-B(BNI) 86.M25V7.003 SCREW M3*6-B(BNI) SCREW M3*6-B(BNI) 86.M08V7.003...
  • Page 50 Exploded Diagram of AT4230C Please refer to the following table and exploded diagram. Partname Description Acer Part No. Q’TY LCD BEZEL ASSY HV4T LCD-BEZEL ASSY 60.M4207.001 LCD 42 IN. AUO LCD (TFT) 42" T420XW01 V3 (QCI) LK.42005.001 T420XW01 V3 LCD BRACKET L PANEL BKT AUO L HX4 33.M34V7.002...

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