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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
WARNING
©2009 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
Haier Group
Model No.
Order No.
TV1012S002V0
LCD TV
LD42K3
MST6I48
Classis
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Table of Contents
Related Manuals for Haier LD42K3
Summary of Contents for Haier LD42K3
- 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. ©2009 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.: 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. - Page 3 Service Manual Model No.: Chapter 6. Operation Instructions 6-1. Front Panel Controls ................27 6-2. Back Panel Controls ................27 6-3. Setting Up Your Remote Control ............28 Chapter 7. Electrical Parts 7-1. Block Diagram ..................29 7-2. Circuit Diagram ..................30 7-3. Wiring Connection Diagram ...............48 Chapter 8.
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Page 4: Chapter 1.General Information
Service Manual Model No.: Chapter 1.General Information 1-1. Document Information Document format: Adobe PDF Author: Compiler: 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. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed. -
Page 5: About Lead Free Solder (Pbf)
Service Manual Model No.: Some semiconductor (solid state) devices can be damaged easily by static electricity. Such 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). - Page 6 Service Manual Model No.: 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. c.
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Page 7: Ordering Spare Parts
Service Manual Model No.: 12. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 13. 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. 14. -
Page 8: How To Read This Service Manual
Service Manual Model No.: 1-4. How to Read this Service Manual 1-4-1. Using icons: Icons are used to attract the attention of the reader to specific information. The meaning of each icon is described in the table below: Note: A “note” provides information that is not indispensable, but may nevertheless be valuable to the reader, such as tips and tricks. -
Page 9: Chapter 2. Speci¿ Cation
Service Manual Model No.: Chapter 2. Specifi cation 2-1. Specifi cation list PAL\SECAM\NTSC... - Page 10 Service Manual Model No.:...
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Page 12: External Pictures (Four Faces)
Service Manual Model No.: 2-2. External pictures (four faces) Front Side Left Side... - Page 13 Service Manual Model No.: Right Side Back Side...
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Page 14: Chapter 3. Disassemble And Assemble
Service Manual Model No.: Chapter 3. Disassemble and Assemble Remove the Bottom Remove the Backcover Remove the Soundbox Remove the bracket of soundbox... - Page 15 Service Manual Model No.: Remove the powerboard,mainboard and signal board Remove the connection of bottom Remove the bracket of the powerboard,mainboard Remove the panel from front cabinet...
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Page 16: Chapter 4. Location Of Controls And Components
Service Manual Model No.: Chapter 4. Location of Controls and Components 4-1. Board Location Parts number Description Power Supply 0094001962 DC18K0E0C00M Mainboard Assembly(0090727319A) 0090726964 Signal Board 0094001254BG Panel 4-2.Mainboard of LD42K3 CNE3 CN21 CN17 CN27 CN25 CN14... -
Page 17: Mainboard
Service Manual Model No.: Speaker connectors (CN 27) Remote connectors (CN25) Pin number Pin number Description Signal name Signal name IRIN IR IN LEDR LED-RED LEDB LED-BLUE Keypad connector (CN14) Pin number Signal name Connector(Power for mainboard) (CN7) 3.3V Description Pin number Signal name KEY0... -
Page 18: Power Supply Board
Service Manual Model No.: LVDS Connector (CN5) Pin number Pin number Description Description Signal name Signal name ODSEL2 ODSEL2 ODSEL1 ODSEL1 PNL_SDA PNL_SDA PNL_CLK PNL_CLK BRI_IN BRI_IN PB-ADJUST PB-ADJUST LVDS Connector (CN2) Pin number Pin number Signal name Description Signal name Description 4-3. - Page 19 Service Manual Model No.: Signal name Pin number CN2(Power for mainboard) Signal name Pin number Pin number Signal name 12V(Audio Amplifier) E-PWM 12V(Audio Amplifier) PW-ON/OFF GND(Audio Amplifier) No Connection GND(Audio Amplifier) Back Light ON/OFF...
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Page 20: Lcd Panel
Service Manual Model No.: 4-4.LCD Panel 4-4-1. Function Description: Display the signal. 4-4-2. Connector de¿ nition LVDS: Symbol Description Symbol Description Ground ‘H’ or NC= 10bit(D) , ‘L’ = 8bit Bit Select No Connection R2AN SECOND LVDS Receiver Signal (A-) No Connection R2AP SECOND LVDS Receiver Signal (A+) -
Page 21: Chapter 5. Installation Instructions
Service Manual Model No.: Chapter 5. Installation Instructions 5-1.Accessories SOURCE H.LOCK STILL pqrs wxyz MUTE Q.VIEW S.MODE P.MODE TV.MENU D.MENU EXIT BACK PLAY/PAUSE ZOOM D.CALL TIME SHIFT TV.CALL AUDIO GUIDE PAGE+ TV/FM INFO CH.LIST PAGE- SHOCK INTERACTION SLEEP GAME BUSINESS User's Guide Batteries Remote Control... - Page 22 Service Manual Model No.:...
- Page 23 Service Manual Model No.: PC/DVI AUDIO Y / VIDEO L - AUDIO - R PC IN COMPONENT / AV2 IN DSMB PC/DVI AUDIO Y / VIDEO L - AUDIO - R PC IN COMPONENT / AV2 IN DSMB SOURCE...
- Page 24 Service Manual Model No.: PC/DVI AUDIO Y / VIDEO L - AUDIO - R PC IN COMPONENT / AV2 IN DSMB...
- Page 25 Service Manual Model No.: Power source TO USE AC POWER SOURCE Use the AC polarized line cord provided for operation on AC. Insert the AC cord plug into a standard polarized AC outlet. Note ❏ Never connect the AC line cord plug to other than the specified voltage.
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Page 26: Chapter 6. Operation Instructions
Service Manual Model No.: Chapter 6. Operation Instructions 6-1. Front Panel Controls TV/AV Press this key to open/close signal source 1 TV/AV options menu. Menu display. Press to access the on-screen 2 MENU menu display. Press to adjust the volume. In the MENU screen, 3 VOL +/- these buttons serve as right/left buttons. -
Page 27: Setting Up Your Remote Control
Service Manual Model No.: 6-3. Setting Up Your Remote Control 1.POWER: Press this key to start TV from standby mode, press it again to return to standby mode. 2.USB: Press this key for quick switching of streaming media. 3.H. LOCK: Refer to the Functional Description on Page 23. 4.Press this key to open/close signal source options menu. -
Page 28: Chapter 7. Electrical Parts
Service Manual Model No.: Chapter 7. Electrical Parts 7-1. Block Diagram... -
Page 29: Circuit Diagram
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Page 41: Wiring Connection Diagram
Service Manual Model No.: 7-3. Wiring Connection Diagram Name Parts number Connection Wire(For Keyboard) 0090402750A Connection Wire(For Remote) 0090401643E Connection Wire(For Speaker) 0090401752E Connection Wire(Power For Mainboard) 0090402865 0090401850D Connection Wire(For Sensitization) 0090402925/0090402924 LVDS Wire 0090402724A LVDS Wire High Voltage connection cable 0090402340A 0090402697 Connection Wire(Between speaker and soundbox) -
Page 42: Chapter 8. Measurements And Adjustments
Service Manual Model No.: 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. 8-1-2.How to exit If you want to exit this factory menu, please press the button ”Exit”... -
Page 43: Video
Service Manual Model No.: 8-2-2. Video 8-2-3. Audio 8-2-4.Channel... -
Page 44: Adjust
Service Manual Model No.: 8-2-5.Function 8-2-6.Adjust 8-2-7.Timer... -
Page 45: Chapter 9. Trouble Shooting
Service Manual Model No.: 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 Press INPUT button to change signal input to TV input Blank screen Restart the television of power supply is interrupted... -
Page 46: Mainboard Failure Check
Service Manual Model No.: 9-2. Mainboard Failure Check 1R SRZHU 1R SRZHU SRZHU SRZHU &KHFN 9 SRZHU VXSSO\ YROWDJH DQG WKH FRQWDFW RI SRZHU VRFNHW &KHFN $& 9 YROWDJH DQG WKH FRQWDFWRI VRFNHW <(6 &KHFN 9 DQG 9 RXWSXW IURP 5HSODFH SRZHU FRUG RU SRZHU HPEHGGHG SRZHU VXSSO\ IRU DEQRUPLW\ VRFNHW... - Page 47 Service Manual Model No.: 3URWHFWLRQ 3URWHFWLRQ 3URWHFWLRQ 3URWHFWLRQ RU RU RU RU ZLWKRXW ZLWKRXW ZLWKRXW ZLWKRXW OLJKW OLJKW OLJKW OLJKW UHIHUV UHIHUV UHIHUV UHIHUV WR WR WR WR WKH WKH GLVDSSHDUDQFH GLVDSSHDUDQFH GLVDSSHDUDQFH GLVDSSHDUDQFH RI RI RI RI LPDJH LPDJH LPDJH LPDJH VHYHUDO...
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- Page 49 Service Manual Model No.: 3RRU 3RRU 3RRU 3RRU VRXQG VRXQG VRXQG VRXQG 3RRU VRXQG UHIHUV WR ZLWKRXW VRXQG RU ZLWK QRLVH FKHFN ZKHWKHU WKH VHOHFWLRQ RI VRXQG V\VWHP LV SURSHU <(6 6ZLWFK WR RWKHU DXGLR LQSXW FKHFN ZKHWKHU '9' 1R VRXQG FKHFN ZKHWKHU UHPRWH FRQWURO PXWH LV LQSXW DQG 3&...
- Page 50 Service Manual Model No.: 3RRU 3RRU 3RRU HPEHGGHG HPEHGGHG SRZHU SRZHU VXSSO\ VXSSO\ VXSSO\ RI RI RI RI 79 3RRU HPEHGGHG HPEHGGHG SRZHU SRZHU VXSSO\ 3RZHU RQ FKHFN HPEHGGHG SRZHU VXSSO\ 96% LQ 79 IRU 9 YROWDJH RXWSXW <(6 +LJK HOHFWULFDO OHYHO H[LVWHG DW &KHFN SRZHU VXSSO\ OLQH IRU ORRVHQHVV FKHFN LQGLFWRU...
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Page 51: Pannel Failure
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- Page 56 Sincere Forever Haier Group Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China http://www.haier.com Printed in China...