Haier LEC32B33200 Service Manual
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Haier LEC32B33200 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. LEC32B33200
WARNING
©2009 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
Haier Group
LCD TV
Z
Chassis
MSD318

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Summary of Contents for Haier LEC32B33200

  • 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. ©2009 Qingdao Haier Electronics Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    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  6SHFL¿FDWLRQV..................3. Location of Controls and Components........... 3-1. Board Location 3-2. Main Board & AV Board 3-3.
  • Page 3 8. TV Operation..…………............. 8.1 How to enter into the factory model 8.2 How to update software 9. Trouble-shooting………….............. 9-1. Simple Check 9-2. Main Board Failure Check 9-3. Panel Failure 10. DVD OPERATION … ……….............. 11. DVD TROUBLE SHOOTING ………….............. - 02 -...

  • Page 4: General Guidelines

    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

    1-3-6 Safety Check after Repairment &RQ¿UP WKDW WKH VFUHZV SDUWV DQG ZLULQJ ZKLFK ZHUH UHPRYHG LQ RUGHU WR VHUYLFH DUH SXW 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.

  • Page 6: Ordering Spare Parts

    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" components. The following techniques should be used to help reduce the ncidence of component damage caused by static by static electricity.

  • Page 7: How To Read This Service Manual

    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: ,FRQV DUH XVHG WR DWWUDFW WKH DWWHQWLRQ RI WKH UHDGHU WR VSHFL¿F LQIRUPDWLRQ 7KH PHDQLQJ RI each icon is described in the table below: Note:...
  • Page 8 Service Manual Model No.: 2. Speci¿cations Model LEC32B33200 Screen Size 31.5 inch Aspect Ratio 16:9 Resolution 1366x768 6.5 (GRAY TO Response Time (ms) GRAY) +88/-88(H), +88/-88 Angel of View (V) Typ. Color Display 16.7M Cable :1-135/ Air: No. of Preset Channels 2-69(ATV&DTV)

  • Page 9: Location Of Controls And Components

    3. Location of Controls and Components 3-1 Board Location A Board B Board LEC32B33200 Description A Board Main Board DH00DLM0000M B Board Power Board 514C3207M06 3-2 Main Board - 08 -...

  • Page 10: Lcd Panel

    3-2-1 Function Description: Main Board Process signal which incept from exterior equipment then translate into signal that panel can display. 3-2-2 Connector de fnition Main board connector Power connectors (J15 J16) high voltage Notes: J16-Pin 2: Backlight on/off: The system c an t urn o n or turn o ff t he backlight of T FT L CD P anel t hrough t he power supply unit path.
  • Page 11 remote connector (J6) Keypad and connector (J7) Speaker connector J11 Pin number Signal nameD escription - 10 -...

  • Page 12: Power Board

    3-3. Power Board 3-3-1 Function Description: Supply power for Main board, Panel. &RQQHFWRUGH¿QLWLRQ - 11 -...

  • Page 13: Lcd Panel

    3-4. LCD Panel MTC315LED-D01H(PANDA:LM315TA-T01) - 12 -...
  • Page 14 3-4-1 Function Description: Display the signal.  &RQQHFWRU GH¿QLWLRQ - 13 -...

  • Page 15: Disassemble And Assemble

    4. Disassemble and assemble 4-1 Remove the Pedestal /D\ GRZQ WKH XQLW VR WKDW UHDU FRYHU faces upward 5HPRYH WKH IRXU VFUHZ IURP WKH UHDU FRYHU LQGLFDWHG ZLWK 7KHQ UHPRYH WKH SHGHVWDO 4-2Remove the Back Cover 5HPRYH WKH WKHVH VFUHZ LQGLFDWHG RQ ¿JXUH DERYH E\ 7KHQ UHPRYH WKH EDFN FRYHU IURP WKH unit.

  • Page 16: Remove The Power Module

    4-4 Remove the power module 5HPRYH WKH IRXU VFUHZ LQGLFDWHG RQ WKH ¿JXUH DERYH E\ 7KHQ UHPRYH WKH SRZHU PRGXOH 4-5 Remove the Main board 5HPRYH WKH WZR VFUHZ LQGLFDWHG RQ WKH ¿JXUH DERYH E\ 'LVFRQQHFWHG WKH FRXSOHU J6 J7 J9 J15 J16 J5 J3 J11 J17 5HPRYH WKH 0DLQ ERDUG 4-6 Remove the speaker Take out the speaker...

  • Page 17: Remove The Remote Control Board

    4-7 Remove the remote control take out the remote control board 5. Installation Instructions 5-1 External Equipment Connections Accessories Battery User GUIDE Remote Control - 16 -...
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  • Page 21: Hdmi Connections

    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. No separated audio connection is necessary. How To Use If the source device supports Auto HDMI function, the output resolution of the source device will be automatically...
  • Page 22 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) Connecting Headphones You can connect a set of headphones to your set if you wish to watch a TV programmer without disturbing the other people in the room.
  • Page 23 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: 1HYHU FRQQHFW WKH $& OLQH FRUG SOXJ WR RWKHU WKDQ WKH VSHFL¿HG YROWDJH Use the attached power cord only.

  • Page 24: Operation Instructions

    6. Operation Instructions 6-1 Front panel controls - 23 -...
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  • Page 26: Electrical Parts

    7. Electrical parts 7-1. Circuit Diagram - 26 -...
  • Page 27 - 27 -...
  • Page 28 - 28 -...
  • Page 29 R192 R192 R193 R193 V800AA V800AA V800AA V800AA - 29 -...
  • Page 30 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 8 6 4 2 8 6 4 2 8 6 4 2 8 6 4 2 8 6 4 2 8 6 4 2 7 5 3 1...
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  • Page 33 R145 R145 R144 R144 R143 R143 - 33 -...
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  • Page 35: Wiring Connection Diagram

    7-2 .Wiring Connection Diagram NO.N Connection Wire(For Speaker) Connection Wire(Power For Mainboard) LVDS Wire Connection Wire(For Keyboard and Remote) Connection Wire(Control for Backlight on/off) Connection Wire(Control for DVD POWER) Connection Wire(Control for DVD) - 35 -...

  • Page 36: Tv Operation

    8. TV Operation 2. AUDIO menu 1. PICTURE MENU The first item of the MENU is the PICTURE MENU. The second item of the MENU is the AUDIO MENU. This menu provides several video adjustment options You can adjust sound options here. for fine tuning the video display.
  • Page 37 OPERATION 1): TV: Press , and the screen shown below will be 3.1. Parental Controls: displayed. Press to select Parental Controls , press , and the screen shown below will be displayed. Enter Password ---- Adjust Select Menu Exit Adjust Select Menu Exit...
  • Page 38 OPERATION 3.2 Timer Description Rating You can adjust the sleep timer and time related settings here. Press to select, press to adjust, press MENU Exempt: Includes news, sports, documents and other information programming: talk shows, music videos, and variety programming. to exit.
  • Page 39 OPERATION 3.4 Menu Settings You can adjust Menu Settings here. 1). Air/Cable: Select Air TV signal or Cable TV signal. Press to select, press to adjust, press MENU 2). Auto Scan: If it's the first time using the TV, you to exit.
  • Page 40 OPERATION 5. Multimedia MENU : play With an external storage device attached to the USB input, you can use the Multimedia Menu to display JPEG pictures : pause and play MP3 music. : stop Before starting operation, verify that the USB storage device : fast backward is using the FAT32 file system format.

  • Page 41: How To Enter Into The Factory Model

    8.1 How to enter into the factory model 1. You can press "source-2-5-8-0" to go into factory setting. Presse the key "exit" to shut the factory setting. Content: 1: ADC setting: set ADC value of YUV,VGA. It can also be auto-set. Adopt 100% color bar to yuv and Checkerboard signal to vga.

  • Page 42: How To Update Software

    8.2 How to update software Haier MSD318QT F/W upgrade with USB SOP Step 1: Ready for F/W Upgrade 1.1 Prepare a USB memory . from computer’s USB port! Step 2: F/W Upgrade 2.1 AC ON 2.2,Then input USB, press POWER.

  • Page 43: Simple Check

    9. Trouble shooting 9-1. Simple check - 43 -...

  • Page 44: Main Board Failure Check

    Service Manual Model No.: 9-2. Main board failure check 1) Black creen Is power LCD normal? Check Q2,Q3 and the 2) White screen on VCC pins of J9 Check if Q3 1 is working Signal on J9 Check if J9 is - 44 -...
  • Page 45 Service Manual Model No.: 3) Panel display abnormally connector is at normal level - 45 -...
  • Page 46 Service Manual Model No.: 4) No sound No sound Check the input Check if there is sound input source signal Check if the volume control is Reset at 0 level or muted volume Check the Check if there is output at speakers Check if the power supply Check if there is +12V input at...
  • Page 47 Service Manual Model No.: 5 TV failure TV no channel Fix the RF Check if there is RF signal input Check the power Check if there is supply circuit to +5V at PIN2 of this PIN2 Check if there is I2C signal at PIN &...
  • Page 48 Service Manual Model No.: (6) HDMI no picture or picture abnormal HDMI no picture or picture abnormal Y Y Y Y If CN2 is disconnected Re-solder it N N N N Check if R301,R310,R319,R317,R351, Y Y Y Y Re-solder them R338 are un-soldered N N N N Check Q35 and the circuit around it...
  • Page 49 Service Manual Model No.: (7)PC no picture or picture abnormal PC no picture or picture abnormal NO SIGNAL Picture abnormal Check the VGA cable AUTO ADJUST Check the circuit from PIN14,PIN13 to U11 Check the RGB circuit from PIN1,PIN2,PIN3 to U11 Replace U11 - 49 -...
  • Page 50 Service Manual Model No.: (8)YPBPR,AV,SCART NO Picture or picture abnormal (8)YPBPR,AV,SCART NO Picture or picture abnormal (8)YPBPR,AV,SCART NO Picture or picture abnormal YPBPR,AV,SCART YPBPR,SCART,RGB All NO SIGNAL color sast N N N N Check Y,PB,PR or Check power R,G,B input circuit - 50 -...
  • Page 51 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 Crosstalk Vcom imbalance...
  • Page 52 Part Name Description Phenomena Failure cause I n c o m i n g I n s p e c t i o n Standard Bright dot dark dot in Dot Defect pannel Bladder between Polarizer and top glass Polarizer Bubble Bladder in Polarizer P a n e l o r Tine or rigidity arose...

  • Page 53: Panel Failure

    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 LCD :Mis-align between TCP and...
  • Page 54 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 B/L lose action *Connect badness...
  • Page 55 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 Uniformity...

  • Page 56: Dvd Operation

    10. DVD OPERATION DVD SIDE PANEL Dolby Digital Multi-angle Disc with its content side (shiny side) facing the front of the unit, insert vertically PLAY/PAUSE into the disc tray Subtitle choices OPEN/CLOSE MP3 files on CD-R/CD-RW Audio choices DVD video How to play a DVD disc 16:9 R RESTRICTED...
  • Page 57 DVD OPERATION MENU OPERATION SYSTEM SETUP Press the SETUP button on the remote control, the SETUP MENU will be Aspect Ratio displayed. After accessing the setup menu, press to select an item, Select the aspect ratio. and press to select the SUBMENU item. Then press the ENTER/OK Notes: button to confirm.
  • Page 58 DVD OPERATION MP3/JPEG PLAYBACK PICTURE CD PLAYBACK The PICTURE CD disc has such a directory structure structure as shown in the following picture. The MP3 disc has a directory structure as shown picture above. Press to choose the root directory and then press ENTER/OK button to enter into the sub directory.

  • Page 59: Function Buttons

    DVD OPERATION Function Buttons DISPLAY Press this button to show the information of the current INSERT/EJECT disc. Press this button to insert/eject the disc. ENTER SUBTITLE Press the button to confirm your choice on the screen. Press this button to select different subtitles subtitles (This function must be supported on the disc) During DVD, CD MP3 or VCD playback, press REV to...

  • Page 60: Dvd Trouble Shooting

    11.DVD TROUBLE SHOOTING If you have any questions, please consult the troubleshooting guide below: NO PICTURE OR SOUND REMOTE NOT WORKING Ensure the power button is on. Ensure the batteries in the remote control are working. Ensure the power outlet is operational. Point the remote control directly at the player s IR sensor.
  • 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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