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LET42H320

Service Manual

Model No.: LET32H320 LET42H320

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Summary of Contents for LET32H320

Page 1: ... 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 Haier Group 2010 Qingdao Haier Electronics Co Ltd All rights reserved Unauthorized copying and distribution is a violation...

Page 2: ...ering Spare Parts 6 1 3 8 Photo used in this manual 6 1 4 How to Read this Service Manual 6 1 4 1 Using icons 6 Chapter 2 Specification 2 1 Specification list 8 2 2 External pictures four faces 9 Chapter 3 Disassemble and Assemble 3 1 Remove the Stand 11 3 2 Remove the Back Cabinet 11 3 3 Remove the Terminal Bracke 11 3 5 Remove the Mainboard 12 3 7 Remove the Remote Control Board 12 Chapter 4 Loc...

Page 3: ...Circuit Diagram 24 7 2 Wiring Connection Diagram 39 Chapter 8 Measurements and Adjustments 8 1 Service Mode 41 8 1 1 How to enter into Service Mode 41 8 1 2 How to exit 41 8 2 Measurements and Adjustments 41 8 2 1 The Main Menu 41 8 2 2 General Setting 42 8 2 3 EEPROM Setting 43 8 2 4 Software UpDate 43 Chapter 9 Trouble shooting 9 1 Simple check 44 9 2 Mainboard Failure Check 45 9 3 Pannel Failur...

Page 4: ... important thing is to list up the potential hazard or risk for the service personnel to open the units and disassemble the units For example we need to describe properly how to avoid the possibility to get electrical shock from the live power supply or charged electrical parts even the power is off This symbol indicates that high voltage is present inside It is dangerous to make any king of conta...

Page 5: ...nder test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 1 3 4 About lead free solder PbF This product is manufactured using lead free solder as a part of a movement within the consumer products industry at large to be environmentally responsible Le...

Page 6: ...l alcohol 90 99 strength CAUTION This is a ammable mixture Unless speci ed otherwise in this service manual lubrication of contacts is not required Capacitors may result in an explosion hazard 5 Do not defeat any plug socket B voltage interlocks with which receivers covered by this service manual might be equipped 6 Do not apply AC power to this instrument and or any of its electrical assemblies u...

Page 7: ...ns 8 Minimize bodily motions when handling unpackaged replacement ES devices Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted oor can generate static electricity suf cient to damage an ES device 1 3 7 Ordering Spare Parts Please include the following informations when you order parts Particularly the Version letter 1 Model n...

Page 8: ...t 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 Reference A reference guides the reader to other places in this binder or in this manual where he she will nd additional information on a speci c topic ...

Page 9: ...ish France etc English France etc Color System PAL SECAM PAL SECAM Audio System DK BG I M L DK BG I M L Audio Output Power Built in W 8W 2 8W 2 Audio Output Power outer W No No Total Power Input W 80W 130W Voltage Range V AC150V 240V AC150V 240V Power Frequency Hz 50 60Hz 50 60Hz Time of Sleep Timer MINS 120Min 120Min Net Weight KG 6 8 11 5 Gross Weight KG 8 5 14 5 Net Dimension MM 782X160X557 101...

Page 10: ...9 Service Manual Model No LET32H320 LET42H320 2 2 External pictures four faces Front Side Left Side ...

Page 11: ...Service Manual Model No LET32H320 LET42H320 10 Right Side Back Side ...

Page 12: ...wo screws indicated with circle 2 Remove all pins around the Cabinet 3 Carefully raise the Back Cabinet from bottom 3 3 Remove the Terminal Bracket 3 1 Remove the Stand Remove the screws indicated by the red circles in the picture LET32H320 LET42H320 3 4 Remove the Power Supply Module Remove the screws indicated by the red circles in below picture LET32H320 11 Service Manual Model No LET32H320 LET...

Page 13: ... by red circles in below picture 3 8 Remove the Speaker Remove the screws indicated by the red circles in below picture Take out the speakers 3 5 Remove the Mainboard 1 Remove the screws indicated with circle 2 Remove the Mainbord and the LED Driver Board LET42H320 LET32H320 LET42H320 LET32H320 LET42H320 Service Manual Model No LET32H320 LET42H320 12 LET32H320 LET42H320 ...

Page 14: ...s and Components 4 1 Board Location LET32H320 No Parts number Description A Board DH1HD1E0200M Mainboard 0090804469 B Board 0094002488 Power Supply Board C Panel 0094002883DA LCD Panel 13 Service Manual Model No LET32H320 LET42H320 ...

Page 15: ...LET42H320 No Parts number Description A Board DH1GL2E0200M Mainboard 0090728289 B Board 0094001855A Power Supply Board C Panel 0094001903DB LCD Panel Service Manual Model No LET32H320 LET42H320 14 ...

Page 16: ...7 5VS 8 ADJ 9 GND 10 PW 11 NC 12 ON OFF Remote control connector J7 Pin number Signal name 1 5VS 2 IR 3 LED_R 4 LED_G 5 GND Connector Definition Eye guide connector J17 Pin number Signal name 1 3V3 2 GND 3 SCL 4 SDA 15 Service Manual Model No LET32H320 LET42H320 LET32H320 LET42H320 LED light connector J700 Pin number Signal name 1 LED_R 2 LED_G 3 GND Remote control connector CN23 Pin number Signal...

Page 17: ...4V 2 24V 3 24V 4 24V 5 24V 6 GND 7 GND 8 GND 9 GND 10 GND 11 NC 12 BL ON OFF 13 E PWM 14 GND LET32H320 LET42H320 Mainboard power supply connector CON2 Pin number Signal name 1 12V 2 12V 3 GND 4 12V 5 GND 6 GND 7 5VS 8 ADJ 9 GND 10 PW 11 NC 12 ON OFF Connector Definition LET32H320 LET42H320 Service Manual Model No LET32H320 LET42H320 16 ...

Page 18: ...LET32H320 17 Service Manual Model No LET32H320 LET42H320 ...

Page 19: ...LET42H320 Service Manual Model No LET32H320 LET42H320 18 ...

Page 20: ...Connect your aerial to the back of the TV into the ANTENNA IN socket IMPROVE YOUR SIGNAL To improve picture quality in a poor signal area use a signal ampli er not supplied 5 2 CONNECTING YOUR TV Remote Control Batteries Accessories User Manual 19 Service Manual Model No LET32H320 LET42H320 ...

Page 21: ...ce cable to the VGA video interface connector on the PC Connect the other end of the cable to the PC interface connector on the TV Tighten the screws on the VGA connectors and connect the audio cable not supplied to the audio input socket on the back of the TV 4 Turn on the power of the TV rstly and then the PC 5 Press the button on the TV or TV remote control to set the video input mode to VGA 6 ...

Page 22: ...Chapter 6 Operation Instructions 6 1 Front Panel Controls 6 2 Back Panel Controls 21 Service Manual Model No LET32H320 LET42H320 ...

Page 23: ...6 3 Setting Up Your Remote Control Service Manual Model No LET32H320 LET42H320 22 ...

Page 24: ...Chapter 7 Electrical Parts 7 1 Circuit Diagram 23 Service Manual Model No LET32H320 LET42H320 ...

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Page 40: ...7 3 Wiring Connection Diagram LET32H320 39 Service Manual Model No LET32H320 LET42H320 ...

Page 41: ...LET42H320 Service Manual Model No LET32H320 LET42H320 40 ...

Page 42: ...e are done 8 1 2 How to exit If you want to exit this factory menu please press the button Exit on the remote 8 2 Measurements and Adjustments 8 2 1 The Main Menu In factory mode menu press up down button to choose the up down item press left right button to the submenu press OK button to af rm press MENU button go to the next page MT5310 Factory Menu This page is general function setting 41 Servi...

Page 43: ...icture Mode This page is software version This page is control the sound effect Color MODE This page is control the Color Mode Picture MODE This page is control the picture Mode Service Manual Model No LET32H320 LET42H320 42 ...

Page 44: ...ta 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 into the USB port select opposite software press right button 43 Service Manual Model No LET32H320 LET42H320 ...

Page 45: ...f correct channel is selected Adjust the antenna Make adjustments by Fine Tune and MANUAL Scan No color for some channel program black and white Verify if the same problem exists in other channels check out of picture and sound system Refer to relative instructions in the Manual for color adjust Spots with some or all pictures Verify if the antennal is correctly connected Verify if the antennal is...

Page 46: ...9 2 Mainboard Failure Check 1 Power supply trouble 45 Service Manual Model No LET32H320 LET42H320 ...

Page 47: ...2 Display trouble exceptional screen Service Manual Model No LET32H320 LET42H320 46 ...

Page 48: ...3 Display trouble white screen 47 Service Manual Model No LET32H320 LET42H320 ...

Page 49: ...4 Display trouble black screen Service Manual Model No LET32H320 LET42H320 48 ...

Page 50: ...5 Audio trouble No sound 49 Service Manual Model No LET32H320 LET42H320 ...

Page 51: ...6 PC no signal or abnormal picture Service Manual Model No LET32H320 LET42H320 50 ...

Page 52: ...7 HDMI problem 8 USB problem 51 Service Manual Model No LET32H320 LET42H320 ...

Page 53: ...n TCP lead cracking ACF bonding short Awful environment and something electric enter into LCD Mis align between TCP and Panel Panel failure TCP failure V Dim Vertal gray line V L D Vertical color line light or dark forever H B D Horizontal bar H Dim Horizontal gary line H L D Horizontal line light or dark forever Service Manual Model No LET32H320 LET42H320 52 ...

Page 54: ...dder between Polarizer and top glass Polarizer Scratch Polarizer Scratch Tine or rigidity arose F inside Polarizer Eyewinker inside Polarizer Eyewinker inside Polarizer Circuit Abnormal Display Abnormal Display 1 Chip lose action 2 IC ahort or jointiog bad 3 Pannel and vsc connect bad Flashing Bright and dark display alternately 53 Service Manual Model No LET32H320 LET42H320 ...

Page 55: ...d EDS Black Screen B L normal only Black screen display FIIcker Crosstalk LCD Vcom imbalance Abnormal Color Only color abormal Capacitance improper bring crosstalk inside LCD pannel Abnormal Color Only color abnormal 1 Chip lose action 2 IC short or jointion bad 3 Pannel and vsc connect bad Service Manual Model No LET32H320 LET42H320 54 ...

Page 56: ...nd electrode B L dark B L brightness darker than normal Connect badnessShort between wire and electrode B L wire damaged B L wire damaged Operation abnormal or systemic noise B L wire open Without backlight Operation abnormal or systemic noise B L shut down B L shutdown in sometime Short bitween lamp housing and wire Because consume power too much F M F M inB L white balck Rotundity or wirelike F ...

Page 57: ...r B L Light leakage Brightness at bottom of LCM brighter than normal B L unit badness Uniformity B L brightness asymmetric Sheet in B L unit is uneven Mount hole Lack screw or screw damage Lack screw Screw damage Service Manual Model No LET32H320 LET42H320 56 ...

Page 58: ...Sincere Forever Haier Group Haier Industrial Park No 1 Haier Road 266101 Qingdao China http www haier com Printed in China ...

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