Haier LE55B1381a Service Manual
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Haier LE55B1381a Service Manual

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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

Model No. LE55B1381a
WARNING
©2011 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
Haier Group
LED TV
MST 318
Chassis

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Summary of Contents for Haier LE55B1381a

  • Page 1: Service Manual

    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. ©2011 Qingdao Haier Electronics Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    Service Manual Model No.: Chapter 1: General Information 1-1. Table of Contents 1. General Information................1-1. Table of Contents 1-2. General Guidelines 1-3. Important Notice 1-4. How to Read this Service Manual ..................3. Location of Controls and Components........... 3-1. Board Location 3-2.
  • Page 3 Service Manual Model No.: 9. Trouble-shooting………….............. 9-2. Main Board Failure Check 9-3. Panel Failure - 02 -...

  • Page 4: General Guidelines

    Service Manual Model No.: 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: Safety Check After Repairment

    Service Manual Model No.: 1-3-6 Safety Check after Repairment in the original positions, or whether there are the positions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades. And be sure the safety of that. General Servicing Precautions 1.

  • Page 6: Ordering Spare Parts

    Service Manual Model No.: 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. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip"...

  • Page 7: How To Read This Service Manual

    Service Manual Model No.: 1-3-8. Photo used in this manual The illustration and photos used in this Manual may not base on the final design of products, which may differ from your products in some way. 1-4. How to Read this Service Manual Using Icons: each icon is described in the table below: Note:...
  • Page 8 Service Manual Model No.: Model LE55B1381a Screen Size 54.6inch Aspect Ratio 16:9 Resolution 1920x1080 6 (GRAY TO Response Time (ms) GRAY) Angel of View Color Display 16777216 No. of Preset Channels 203 OSD Language English/France/Spaish Color System NTSC Audio System Audio Output Power 10W×2...

  • Page 9: Location Of Controls And Components

    Service Manual Model No.: 3. Location of Controls and Components 3-1 Board Location Part Number Description Main board A Board 0113070686 0113050420 B Board Power board 0113060163 C Board 120HZ control board 3-2 Main Board J10: J4:IR&KEY J6:PANEL J5:POWER J3:DVD J8:AUDIO HDMI BOARD...
  • Page 10 Service Manual Model No.: 3-2-1 Function Description: Main Board Process signal which incept from exterior equipment then translate into signal that panel can display. Main board connector Power connectors (J1, J5) Notes: J1-Pin 4: Backlight on/off: The system can turn on or turn off the backlight of TFT LED Panel through the power supply unit path.
  • Page 11 Service Manual Model No.: Keypad and remote connector (J4) Pin number Signal name Description Ground Power key CH- key CH+ key Vol- key Vol+ key Meny key TV/AV key Ground IR Receive LED_G Green Indicator LED_R Red Indicator +5V DC Power Supply - 10 -...

  • Page 12: Power Board

    Service Manual Model No.: Speaker connector J12 Pin number Signal name Description Audio Right+channel Output Audio Right- channel Output Audio Left- channel Output Audio Left+channel Output 3-3. Power Board Pin-CON1 Connection And Function NO . P in C onnec tion Func tion AC -N AC INP UT NUTUR E...

  • Page 13: Led Panel

    Service Manual Model No.: 3-4. LED Panel V546H1-LE5 - 12 -...
  • Page 14 Service Manual Model No.: 3-5 Interface Connec t ions CNF2 Connector Pin Assignment(187059-51221(P-two) or equivalent) Symbol Description Symbol Descrip tion Ground CH2[0]- Second pixel Odd LVDS Signal- Second pixel Odd LVDS Signal+ CH2[0]+ Second pixel Odd LVDS Signal- CH2[1]- Second pixel Odd LVDS Signal+ CH2[1]+ CH2[2]- Second pixel Odd LVDS Signal-...
  • Page 15 Service Manual Model No.: CNF3 Connector Pin Assignment(187059-51221(P-two) or equivalent) Symbol Description Symbol Descrip tion CH3[4]- Ground Third pixel Odd LVDS Signal- CH3[4]+ Third pixel Odd LVDS Signal+ Four pixel Odd LVDS Signal- CH4[0]- Four pixel Odd LVDS Signal+ CH4[0]+ CH4[1]- Four pixel Odd LVDS Signal- Four pixel Odd LVDS Signal+...
  • Page 16 Service Manual Model No.: CN1(Header):CI0114M1HR0-LA(CviLux) +24V Normal (3.3V) Status Abnormal(0V) Extemal PWM E_PWM Control Ixtemal PWM I_PWM Control BLON BL ON/OFF Note(1)Pin12:Extemal PWM control (use pin 12):Pin 13 must open. Note(2)Pin13:Intemal PWM control (use pin 13):Pin12 must open. Note(3)Pin12 and Pin13 can’t open in the same period. 3-6 120HZ Control Board CON1 CON2...

  • Page 17: Disassemble And Assemble

    Service Manual Model No.: 4. Disassemble and assemble Front Back 4-1, Remove the10 screws as below picture - 15 -...
  • Page 18 Service Manual Model No.: 4-2, Remove the 21 screws on the back cabinet 4-3, Remove the 4 screws of the fixing board on the back cabinet. 4-4, Remove the 2 screws as below picture - 16 -...
  • Page 19 Service Manual Model No.: 4-5, Remove the 7 screws on the fixing board 4-6,Remove the 4 screws as below picture - 17 -...
  • Page 20 Service Manual Model No.: -7, Remove the 4 screws fixing the power board. 4-8,Remove the 2 screws as below picture - 18-...
  • Page 21 Service Manual Model No.: 4-9,Remove the 1 screws as below picture 4-10, Remove the 6 screws fixing the side iron stick. - 19 -...
  • Page 22 Service Manual Model No.: 4-11 - 20 -...

  • Page 23: Installation Instructions

    Service Manual Model No.: 5. Installation Instructions 5-1 External Equipment Connections Accessories PICTURE AUDIO MTS/SAP SLEEP INPUT MENU MUTE ENTER VOL+ EXIT RECALL USB PLAY/PAUSE STOP REPEAT PREV NEXT DISPLAY GUIDE FAVORITE CH.LIST Battery User GUIDE Remote Control Antenna Connection Connect one end of a coaxial cable (not included) to the ANT IN jack on the back of your TV/DVD combo, then connect the other end of the cable into the antenna or cable TV wall outlet.
  • Page 24 Service Manual Model No.: AV Input Connection Note: All cables shown are not included with the TV. RCA Video Cable RCA Audio Cable DVD or VCR - Connect the VIDEO and AUDIO output jacks on the DVD or VCR to the AV IN jacks on the TV set with a RCA cable.
  • Page 25 Service Manual Model No.: PC Connection Note: All cables shown are not included with the TV. - If using a sound card, adjust the PC sound as required. - Set the video resolution of your PC audio PC to 1024x768, 60Hz on its cable original monitor.

  • Page 26: Hdmi Connections

    Service Manual Model No.: 5-2 HDMI Connections When the source device(DVD player or Set Top Box) supports HDM How To Connect 1. Connect the source device to HDMI port of this TV with an HDMI cable(not supplied with this product). 2.
  • Page 27 Service Manual Model No.: Cable sample HDMI Cable (not supplied with the product) HDMI to DVI Cable ( not supplied with the product) Analog Audio Cable (Stereo to RCA type) (not supplied with the product) - 25 -...
  • Page 28 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. NOTES: Use the attached power cord only. electrician replace the obsolete outlet.

  • Page 29: Operation Instructions

    Service Manual Model No.: 6. Operation Instructions Basal information 6-1 Front panel controls 2). The functions of the buttons: INPUT: Press to display the input source menu. MENU: Press to display the OSD menu, press again to exit the menu. VOL+/-: Press to adjust the volume.

  • Page 30: Setting Up Your Remote Control

    Service Manual Model No.: 6-3 Setting Up Your Remote Control 1: POWER TO set the TV to standby or power on. AUDIO PICTURE 2:PICTURE ress repeatedly to cycle through the available. MTS/SAP SLEEP 3:CCD Press to display the closed caption. 4:ARC Adjust picture size.

  • Page 31: Electrical Parts

    Service Manual Model No.: 7. Electrical parts 7-1. Block diagram Schematics BlockDiagram LED PANNEL BACKLIGHT flash Antenna in TDA18273 lvds HDMI YPbPr MST318 SCART COAX Earphone POWER DDR2 512M TPA3124 SPEAKER TITLE: Cover page Design: MODEL:MST318 Checked: PART NO.: DWG NO.: Apprd: SHEET: 0 pages 8 VER:...

  • Page 32: Circuit Diagram

    Service Manual Model No.: 7-2. Circuit Diagram NC/100n NC/100n NC/100n NC/100n NC/100n NC/100n - 30 -...
  • Page 33 Service Manual Model No.: 100nC133 100n C133 - 31 -...
  • Page 34 Service Manual Model No.: MA_RASZ MA_CASZ MA_WEZ VDD1 MIUA_ODT MA_ODT VDD2 VDD3 VSSDL VDD4 VSSQ10 VDD5 VSSQ9 VDDQ1 VSSQ8 VDDQ2 VSSQ7 VDDQ3 VSSQ6 VDDQ4 VSSQ5 VDDQ5 VSSQ4 VDDQ6 VSSQ3 VDDQ7 VSSQ2 VDDQ8 VSSQ1 VDDQ9 VSS4 VDDQ10 VSS3 VDDL A_MVERF VSS2 VREF VSS1 7 5 3 1...
  • Page 35 Service Manual Model No.: CapRFAGC 2.2nH 1000mA +/- 0.2nH 2.2nH 1000mA +/- 0.2nH Test1 UHFH Xtal UHFSupply Xtalnot UHFL 2.4nH_220mA_+/-0.05nH 2.4nH_220mA_+/-0.05nH VCCSYN VCCRF Filter 8.2nH_110mA_+/-0.1nH 8.2nH_110mA_+/-0.1nH CAPREGVCO VHFH GNDSYNT VHFSens VTUN VHFL L11100nH_150mA_+/-5% L11100nH_150mA_+/-5% VHFSupply - 33 -...
  • Page 36 Service Manual Model No.: - 34-...
  • Page 37 Service Manual Model No.: - 35 -...
  • Page 38 Service Manual Model No.: C165 10U/10V C165 10U/10V C164 10u/10V C164 10u/10V R205 R205 R206 R206 C124NC/22n C124NC/22n C130 C130 NC/22n NC/22n C171 C171 220P 220P R168 R168 C145 C145 220P 220P R181 R181 R217 R217 R198 R198 C219 C219 C217 C217 - 36 -...
  • Page 39 Service Manual Model No.: NC/2.2u/0805 NC/2.2u/0805 100uF/16V 100uF/16V 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1...
  • Page 40 Service Manual Model No.: - 38 -...

  • Page 41: Tv Operation

    Service Manual Model No.: 8.TV Operation 8-1.TV OSD Menu Press MENU button to display the OSD menu as below: Main menu Picture, Audio, Time, Setup, Lock, Channel Submenu (Picture menu for example) HDMI CEC Hint you should operate the OSD menu according to the hint.
  • Page 42 Service Manual Model No.: CEC mode: Turn on/off the CEC mode. TV Auto Power: The connected device(DVD) will be powered on when the TV’s on. TV Auto Switch: The TV will be in the source which is suit for the connected device(DVD).
  • Page 43 Service Manual Model No.: Time menu Sleep timer: You may set the automatic shutdown timer choosing from 5 to 240 minutes, or deactivate this function. Time zone: Select between Pacific,Alaska,Hawaii,Eastern,Central and Mountain Daylight Saving Time: Select between On and Off. Clock: User can not change time manually during DTV mode, for time is from signal source directly.
  • Page 44 Service Manual Model No.: Setup menu Menu Language: Select OSD menu language. Zoom Mode: Select the zoom mode between 16:9, 16:9 zoom, 4:3, 4:3 zoom. Noise reduction: Select the noise reduction mode between Strong, Off, Weak and Middle. PC SETUP: If the video input signal comes from your PC, you may adjust the V-Position, H-Position, Clock, Phase or even perform an Auto adjustment.
  • Page 45 Service Manual Model No.: Lock menu You must enter the password to gain access to the Lock menu. The default password is 0000. You may modify the following options: Change password: Change the password,you must enter the new password twice to confirm it.
  • Page 46 Service Manual Model No.: 7. Channel menu Air/Cable: Allow you to select antenna between Air and Cable. If you selet “Cable”, the following items(Favorite, Show/Hide, Channel NO, Channel Label and DTV Signal) are unable to use. Auto Scan: Enter the Auto Scan menu to start auto scan. If you select “Cable”...

  • Page 47: Upgrade Software

    Service Manual Model No.: 8-2 Upgrade software Haier MST318 F/W upgrade with USB SOP Step 1: Ready for F/W Upgrade 1.1 Prepare a USB memory . 1.2 Copy the software file(merg.bin)from your computer to the USB memory,and remove it from computer’s USB port! Step 2: F/W Upgrade 2.1 AC ON...

  • Page 48: Factory Menu

    Service Manual Model No.: 8-3 Factory menu 1. You can press "MENU-8-8-9-3" to go into factory setting. Presse the key "exit" to shut the factory setting. content: 1:Version Info:the information about the TV and software - 46-...
  • Page 49 Service Manual Model No.: 2: ADC setup: set ADC value of YUV,VGA. It can also be auto-set. Adopt 100% color bar to yuv and Checkerboard signal to vga. adjust the color temperature and white balance of each signal source. Color Temp: - 47 -...
  • Page 50 Service Manual Model No.: 4: Video Quality:change value of each picture mode’s options 5:Sound Quality:change value of each sound mode’s options - 48 -...
  • Page 51 Service Manual Model No.: 6:Curve Setting:change Video and Sound curve (1):Video curve Setting (2):Sound curve Setting - 49 -...
  • Page 52 Service Manual Model No.: 7:OverScan:Change the display coordinate of the source single 8:Aging Mode:made the TV into aging mode.You can out the mode only use the Key Power 9:SW Upgrade:upgrade the software 10:Shipment:reset all the amend except ADC - 50 -...

  • Page 53: Trouble Shooting

    Service Manual Model No.: 9. Trouble shooting 9-1. Simple check - 51 -...

  • Page 54: Main Board Failure Check

    Service Manual Model No.: 9-2. Main board failure check Power Units Problem Solving In stand-by condition, Check pin 10of J5, Whether got 5V Whether main board testing TP8point got 3.3V? Normal booting Check U9 power Check external network power suppply After power on, check whether pin 3/4 of J5got 5v, pin 1 of J5 got 12v, testing...
  • Page 55 Service Manual Model No.: State: No Sound No sound If there is anyaudio signal input or Whether amplifier power supply is normal? Whether the volume, MUTE setting is normal? Whether there is signal output from J2? Whether there is signal input in U4 TPA3110 3/12? Check whether there is signal...
  • Page 56 Service Manual Model No.: state:black screen Black screen Whether the voltage that power panel supply to Inverter is normal? Check the socket that controls Inverter, whether the voltage output from pin 4 of J1 is in low level? Check and repair the Check the external power supply circuit Inverter is broken or network that controls...
  • Page 57 Service Manual Model No.: 9-3. Pannel failure Failure Mode Part Name Description Phenomena Failure cause Block Defect :TCP cracking or cracking Dim or L/D :TCP Sunken V B/D Vertical bar :TCP lead cracking :ACF bonding short :Awful environment and something electric enter V Dim Vertal gray line into LED...
  • Page 58 Service Manual Model No.: Failure Mode Part Name Description Phenomena Failure cause White Screen B/L normal, only white screen display M a y b e c a u s e d by surge current Black Screen B/L normal, and EDS only Black screen display FIIcker...
  • Page 59 Service Manual Model No.: Failure Mode Part Name Description Phenomena Failure cause Mechanlcal When Caused Nolse turn panel,appear b y M e c h a n i c a cacophony noise of backlight unit Ripple Connectric circle Causeed by between mechanism and pannel B/L off...
  • Page 60 Service Manual Model No.: Failure Mode Part Name Description Phenomena Failure cause Brightness B/L unit badness at bottom of LCM Light leakage brighter than normal B / L b r i g h t n e s s Sheet in B/L unit Mechanlcal or B/ asymmetric is uneven...
  • Page 61 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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