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Haier
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair
the product or products dealt with in this service information by anyone else could result in serious injury or death.
SERVICE MANUAL
Model No.
WARNING
©2010 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
Haier Group
Order No.
LCD TV
LET32H320
LET42H320
MT5310
TV1107S001V0
Chassis
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Related Manuals for Haier LET32H320
Summary of Contents for Haier LET32H320
- Page 1 Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death. ©2010 Qingdao Haier Electronics Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
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Page 2: Table Of Contents
Service Manual Model No.: LET32H320 LET42H320 CONTENTS Chapter 1. General Information 1-1. Document Information .............3 1-2. General Guidelines..............3 1-3. Important Notice ...............3 1-3-1. Follow the regulations and warnings ............. 3 1-3-2. Be careful to the electrical shock ............3 1-3-3. Electro static discharge (ESD) ............... 3 1-3-4. - Page 3 Service Manual Model No.: LET32H320 LET42H320 Chapter 6. Operation Instructions 6-1. Front Panel Controls ..............22 6-2 Back Panel Controls ...............22 6-3 Setting Up Your Remote Control ...........23 Chapter 7. Electrical Parts 7-1. Circuit Diagram...............24 7-2 . Wiring Connection Diagram ..........39 Chapter 8.
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Page 4: Chapter 1. General Information
Service Manual Model No.: LET32H320 LET42H320 Chapter 1. General Information 1-1. Document Information Document format: Adobe PDF Author: Zhao Xinjie Compiler: Bao Qinghong 1-2. General Guidelines When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. -
Page 5: About Lead Free Solder (Pbf)
Service Manual Model No.: LET32H320 LET42H320 components commonly are called Electrostatically Sensitive (ES) Devices. The following techniques should be used to help reduce the incidence of component damage caused by electros static discharge (ESD). Electrostatically Sensitive (ES) Devices Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. - Page 6 Service Manual Model No.: LET32H320 LET42H320 1. Always unplug the receiver AC power cord from the AC power source before: a. Removing or reinstalling any component, circuit board module or any other receiver assembly. b. Disconnecting or reconnecting any receiver electrical plug or other electrical connection.
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Page 7: Ordering Spare Parts
Service Manual Model No.: LET32H320 LET42H320 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static type solder removal device. Some solder removal devices not classi¿ ed as "anti-static" can generate electrical charges suf¿ cient to damage ES devices. - Page 8 Service Manual Model No.: LET32H320 LET42H320 Caution: A “caution” is used when there is danger that the reader, through incorrect manipulation, may damage equipment, loose data, get an unexpected result or has to restart(part of) a procedure. Warning: A “warning” is used when there is danger of personal injury.
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Page 9: Chapter 2. Specifi Cation
Service Manual Model No.: LET32H320 LET42H320 Chapter 2. Specifi cation 2-1. Specifi cation list Model LET32H320 LET42H320 Screen Size 32" 42" Aspect Ratio 16:9 16:9 Resolution 1920x1080 1920x1080 Response Time (ms) 8 (GRAY TO GRAY) 8 (GRAY TO GRAY) Angel of View H:178°, V:178°... -
Page 10: External Pictures (Four Faces)
Service Manual Model No.: LET32H320 LET42H320 2-2 External pictures (four faces) Front Side Left Side... - Page 11 Service Manual Model No.: LET32H320 LET42H320 Right Side Back Side...
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Page 12: Chapter 3. Disassemble And Assemble
Service Manual Model No.: LET32H320 LET42H320 Chapter 3. Disassemble and Assemble 3-3. Remove the Terminal Bracket 3-1 Remove the Stand Remove the screws indicated by the red circles in the picture. LET32H320 1. Lay down the TV set . 2. Remove the screw from the stand which is indicated with circle in the picture above. -
Page 13: Remove The Mainboard
Service Manual Model No.: LET32H320 LET42H320 3-6. Remove the KEY Board LET42H320 Remove the Key board indicated by red circles in below picture. 3-7. Remove the Remote Control Board 1. Remove the one screw indicated with circle. 2. Remove the Remote Control Board. -
Page 14: Chapter 4. Location Of Controls And Components
Service Manual Model No.: LET32H320 LET42H320 Chapter 4. Location of Controls and Components 4-1. Board Location LET32H320 Parts number Description A Board DH1HD1E0200M Mainboard(0090804469) B Board 0094002488 Power Supply Board C Panel 0094002883DA LCD Panel... - Page 15 Service Manual Model No.: LET32H320 LET42H320 LET42H320 Parts number Description A Board DH1GL2E0200M Mainboard(0090728289) B Board 0094001855A Power Supply Board C Panel 0094001903DB LCD Panel...
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Page 16: Mainboard
Service Manual Model No.: LET32H320 LET42H320 4-2. Mainboard LET42H320 LET32H320 Remote control connector J7 Connector Defi nition Pin number Signal name Mainboard power supply connector J1 LED_R Pin number Signal name LED_G Eye guide connector J17 Pin number Signal name... -
Page 17: Power Supply Board
Service Manual Model No.: LET32H320 LET42H320 4-3. Power Supply Board 24V connector CON3 LET32H320 Pin number Signal name +24V +24V +24V +24V +24V BL-ON/OFF E-PWM LET42H320 4-4. LCD Panel LET32H320 Connector Defi nition CON1 is the Power cord connector Mainboard power supply... - Page 18 Service Manual Model No.: LET32H320 LET42H320 LET32H320...
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Page 20: Chapter 5. Installation Instructions
Service Manual Model No.: LET32H320 LET42H320 Chapter 5. Installation Instructions 5-1 External Equipment Connections Accessories Batteries Remote Control User Manual 5-2 CONNECTING YOUR TV ANTENNA CONNECTION Connect your aerial to the back of the TV into the ANTENNA IN socket. -
Page 21: Connecting Your Tv
Service Manual Model No.: LET32H320 LET42H320 CONNECT YOUR PC TO THE TV You can use your TV as a monitor for your personal computer by connecting it with a VGA cable (not supplied). 1 Read your computer user guide and check it has a VGA connector. -
Page 22: Chapter 6. Operation Instructions
Service Manual Model No.: LET32H320 LET42H320 Chapter 6. Operation Instructions 6-1. Front Panel Controls 6-2 Back Panel Controls... -
Page 23: Setting Up Your Remote Control
Service Manual Model No.: LET32H320 LET42H320 6-3 Setting Up Your Remote Control... -
Page 24: Chapter 7. Electrical Parts
Service Manual Model No.: LET32H320 LET42H320 Chapter 7. Electrical Parts 7-1. Circuit Diagram... - Page 25 Service Manual Model No.: LET32H320 LET42H320...
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Page 40: Wiring Connection Diagram
Service Manual Model No.: LET32H320 LET42H320 7-3 . Wiring Connection Diagram LET32H320... - Page 41 Service Manual Model No.: LET32H320 LET42H320 LET42H320...
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Page 42: Chapter 8. Measurements And Adjustments
Service Manual Model No.: LET32H320 LET42H320 Chapter 8. Measurements and Adjustments 8-1. Service Mode 8-1-1.How to enter into Service Mode The way to the factory mode menu: Step 1: Press Menu, Step 2: Input 8893, Step 3: Press “OK” System will be into the factory mode menu when 3 steps above are done. -
Page 43: General Setting
Service Manual Model No.: LET32H320 LET42H320 8-2-2. General Setting Picture MODE Color MODE This page is control the picture Mode. This page is control the Color Mode. This page is control the sound effect Picture Mode This page is software version... -
Page 44: Eeprom Setting
Service Manual Model No.: LET32H320 LET42H320 8-2-3. EEPROM Setting RESET ALL is to clean up Eeprom data and it will make the TV come back to the default mode 8-2-4. Software UpDate In this page , you just consider the software update function.Plug USB... -
Page 45: Chapter 9. Trouble Shooting
Service Manual Model No.: LET32H320 LET42H320 Chapter 9. Trouble shooting 9-1. Simple check Verify if the television is properly plugged Verify if the television is properly supplied power No picture/ No sound Verify if electricity is available. Verify if correct signals are input... -
Page 46: Mainboard Failure Check
Service Manual Model No.: LET32H320 LET42H320 9-2. Mainboard Failure Check 1 Power supply trouble... - Page 47 Service Manual Model No.: LET32H320 LET42H320 2 Display trouble(exceptional screen)
- Page 48 Service Manual Model No.: LET32H320 LET42H320 3 Display trouble(white screen)
- Page 49 Service Manual Model No.: LET32H320 LET42H320 4 Display trouble(black screen)
- Page 50 Service Manual Model No.: LET32H320 LET42H320 5.Audio trouble(No sound)
- Page 51 Service Manual Model No.: LET32H320 LET42H320 6 PC no signal or abnormal picture...
- Page 52 Service Manual Model No.: LET32H320 LET42H320 7 HDMI problem 8 USB problem...
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Page 53: Pannel Failure
Service Manual Model No.: LET32H320 LET42H320 9-3. Pannel Failure Failure Mode... - Page 54 Service Manual Model No.: LET32H320 LET42H320...
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- Page 58 Sincere Forever Haier Group Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China http://www.haier.com Printed in China...