Service Manuals, User Guides, Schematic Diagrams or docs for : HAIER LCD LET-26C600 LEY-26C600 CHASSIS MSD306 haier_let-26c600_ley-26c600_chassis_msd306

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                                        SERVICE MANUAL
                                                                                                                 LED TV



                                                                      Model No. LET-26C600
                                                                                LEY-26C600



                                                                                   MSD306                             Chassis




                                                          WARNING
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.:



Chapter 1: General Information
1-1. Table of Contents
     1. General Information...........................................................................1
         1-1. Table of Contents                                                                                  1
         1-2. General Guidelines                                                                                 3
         1-3. Important Notice                                                                                   3
         1-4. How to Read this Service Manual                                                                    6

                             .................................................................................... 6
     3. Location of Controls and Components........................................... 8
         3-1. Board Location                                                                                     8
         3-2. Main Board & AV Board                                                                              8
         3-3. Power Board                                                                                      11
         3-4. LCD Panel                                                                                        12
      4. Disassemble and Assemble.......................................................... 15
         4-1 Remove the Pedestal                                                                               15
         4-2 Remove the Back Cover                                                                             15
         4-3 Remove the Adhesive Tape                                                                          15
         4-4 Remove the Terminal Bracket                                                                       16
         4-5 Remove the Power Module                                                                           16
         4-6 Remove the Main Board                                                                             16
         4-7 Remove the Speaker                                                                                17
         4-8 Remove the Remote Control Board                                                                   17
      5. Installation Instructions........................................................... 18
         5-1 External Equipment Connections                                                                    18
         5-2 HDMI Connections                                                                                  21
      6. Operation Instructions............................................................. 24
         6-1 Front Panel Controls                                                                              24
         6-2 Back Panel Controls                                                                               24
         6-3 Universal Remote Control                                                                          25
      7. Electrical Parts......................................................................... 26
         7-1. Block Diagram                                                                                    26
         7-2. Circuit Diagram                                                                                  27
         7-3. Wiring Connection Diagram                                                                        35
      8. Measurements and Adjustments................................................ 39
         8-1. How to enter into the factory model                                                              42
         8-2. How to update software                                                                           43

                                                - 01 -
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9. DVD OPERATION.......................................................................... 44

     9-2. DVD Trouble Shooting                                                             48




10. Trouble-shooting ....................................................................... 49
                   ...
    10-1. Simple Check                                                                      49
    10-2. Main Board Failure Check                                                          50
    10-3. Panel Failure                                                                     57




                                      - 02 -
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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.

      After servicing, make the following leakage current checks to prevent the customer from
      being exposed to shock hazards.
      1) Leakage Current Cold Check
      2) Leakage Current Hot Check
      3) Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive

1-3. Important Notice
      1-3-1. Follow the regulations and warnings
      Most 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 contact with any inside part of this product.
                  This symbol indicates that there are important operating and maintenance
                  instructions in the literture accompanying the appliance.

      1-3-2. Be careful to the electrical shock

      to rain or excessive moisture. This TV must not be exposed to dripping or splashing water,


      1-3-3. Electro static discharge (ESD)
      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).
      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. Lead-free solder
      must be used in the servicing and repairing of this product.


      Special parts which have purposes of fire retardant (resistors), high-quality sound
      (capacitors), low noise (resistors), etc. are used.
      When replacing any of components, be sure to use only manufacture's specified parts
      shown in the parts list.

         Safety Component


                                             - 03 -
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                                                                       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. 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. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic
capacitors may result in an explosion hazard.
2. Test high voltage only by measuring it with an appropriate high voltage meter or other
voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage
probe.
  Do not test high voltage by "drawing an arc".

3. Do not spray chemicals on or near this receiver or any of its assemblies.

4. Unless specified otherwise in this service manual, clean electrical contacts only by
applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or
comparable non-abrasive applicator; 10% (by volume) Acetone and 90% (by volume)
isopropyl alcohol (90%-99% strength).
CAUTION:

  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 unless
all solid-state device heat sinks are correctly installed.
7. Always connect the test receiver ground lead to the receiver chassis ground before
connecting the test receiver positive lead.
  Always remove the test receiver ground lead last. Capacitors may result in an explosion
hazard.


CAUTION:                                                                             eiver.

9. Remove the antenna terminal on TV and turn on the TV.

10. Insulation resistance between the cord plug terminals and the eternal exposure metal
should be more than Mohm by using the 500V insulation resistance meter.

11. If the insulation resistance is less than M ohm, the inspection repair should be required.
If you have not the 500V insulation resistance meter, use a Tester. External exposure
metal: Antenna terminal Headphone jack


                                      - 04 -
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         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.
      1. Immediately before handling any semiconductor component or semiconductor-
      equipped assembly, drain off any electrostatic charge on your body by touching a known
      earth ground. Alternatively, obtain and wear a commercially available discharging wrist
      strap device, which should be removed to prevent potential shock reasons prior to applying
      power to the unit under 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.

      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



      to damage ES devices.
      6. Do not remove a replacement ES device from its protective package until immediately
      before you are ready to install it.
      (Most replacement ES devices are packaged with leads electrically shorted together by
      conductive foam, aluminum foil or comparable conductive material).

      7. Immediately before removing the protective material from the leads of a replacement
      ES device, touch the protective material to the chassis or circuit assembly into which the
      device will be installed.
      CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other
      safety precautions.

      8. Minimize bodily motions when handling unpackaged replacement ES devices.
      (Otherwise harmless motion such as the brushing together of your clothes fabric or the

      an ES device.)



      1-3-7. Ordering Spare Parts
      Please include the following informations when you order parts. (Particularly the Version
      letter)
      1. Model number, Serial number and Software Version
      The model number and Serial number can be found on the back of each product and the
      Software Version can be found at the Spare Parts List.
      2. Spare Part No. and Description



                                          - 05 -
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     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:
     A "note" provides information that is not indispensable, but may nevertheless be valuable
     to the reader, such as tips and tricks.

     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.

     Reference:
     A "reference" guides the reader to other places in this binder or in this manual, where he/




                                           - 06 -
Service Manual
Model No.:




Model                   LET-26C430            LEY-26C430
Screen Size             26inch                    26inch
Aspect Ratio            16:9                      16:9
Resolution              1366x768                 1366x768
                        6.5 (GRAY TO            6.5 (GRAY TO
Response Time (ms)
                        GRAY)                   GRAY)
Angel of View           176o                     176o
Color Display           16777216                 16777216
No. of Preset Channels 400                         400
OSD Language            English                   English
Color System            PAL/SECAM              PAL/SECAM
Audio System            DK, BG, I, M, L, L'   DK, BG, I, M, L, L'
Audio Output Power
                        5W



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