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Sharp LC-52D62U OPC + Power LEDs on front bezel blink 3x, stop, repeat every 2 or so seconds. It was mentioned in the past that this is either Power board or the Main video board. I have inspected both - see no obvious issues. Could you point at the problematic component reference designator, please. Thanks for your help and expertise. Kind regards,

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  • yuryws Aug 22, 2010

    Perhaps CHU3505 would be able to contribute to this - many thanks.

  • yuryws Aug 31, 2010

    Capacitors are fine, and so is the power board. Thank you for your suggestion.

    The problem was the main tuner board - there is a reason as to why Shrap chose to heavily heatsink the three ICs on that board - one or more of them must have "died" as a result of overheating.

    Replaced the main tuner board - all is OK now.



    Kind regards,

  • yuryws Aug 31, 2010

    The problem was the main tuner board - there is a reason as to why Shrap chose to heavily heatsink the three ICs on that board - one or more of them must have "died" as a result of overheating.

    Replaced the main tuner board - all is OK now.

    Thanks for all of your comments.

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Look for Bad Capacityors on power supply board they will be vented,swollen or puffed up on top. 1000uf 16v 220uf 10v 330uf 10v

Posted on Aug 23, 2010

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I have the list of problem codes/error type and the repair required in hand. I need to know how many times power blinks on its own independently before there is a pause, and then I need to know the same about opc then I can provide more details.

Posted on Aug 22, 2010

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  • Loretta Northcutt
    Loretta Northcutt Aug 22, 2010

    I may as well type the full chart and you'll have it

    power light opc light Errror Type Repair

    -- AC Power failure Loose connection, Power Unit or Main Unit
    1(1/sec) Lamp Failure Loose connection to Inverters, reload firmware
    Inverter Unit or LCD Panel
    2X Power Failure Inverter Unit or LCD Panel
    2X 1X 13V/UR10V failure Power Unit or Main Unit
    2X 2X 3.3V Main Failure Power Unit or Main Unit
    2X 3X UR6V failure Power Unit or Main Unit
    2X 5X Panel 5V failure (1) LCD Control Unit or LCD Panel



    (1) SOF driver shorted on LCD Panel - disconnect one of the LCD Control Unit cables from panel, if TV power on with backlight or a crack is in panel, replace LCD Panel.
    Attempt force power on
    Enter into service mode set Lamp Error to 0


    This is the list for when the television does not turn on. There is a different list for when it is turning on and turning itself right back off with a blink pattern.

  • yuryws Aug 22, 2010

    Thanks you for your reply.
    The TV does turn ON and OFF a number of times, this follows by with power and OPC LEDs flashing in the following pattern: 3x in a row power and OPC LED blinking, then the LEDs go off for 2-3 sec, then the pattern repeats.

    The problem appears to be on the Main tuner board (the one with HDMI connectors).
    I swapped the board betweeen a working and a broken TV set - the problem stays with this board. The power supply is OK.

    Anything particular on the Main tuner board that needs to be inspected/repaired?

    Thanks.

  • Loretta Northcutt
    Loretta Northcutt Aug 23, 2010

    It is important to look at the lights separately. Look at power all by itself and see how many times it blinks before it pauses and then look at opc all by itself. If it is really 3X power and 3X opc the error type is communication and the repair is a main unit. Sharp does not point to a specific part of the main unit in particular that needs to be repaired; Sharp recommends replacing the entire main unit. If you notice that it is 3X power and 2X opc the error type is main failure and the repair strategy is replace the main unit or the LCD Control Unit. 3X power and 1X opc is communication error and replace the main unit.
    Do you have any lamp errors? Have you completed an INIT? Make sure you complete a lamp error reset or the tv will go into a coma.

  • yuryws Aug 23, 2010

    I do not beleive lamp error is present. I do have Power and OPC LEDs flash 3x together, not separate. So it looks like the comm error as described in the service manual.

    What is "INIT" you mentioned and will I have to perform a lamp error reset if I were to replace the main board?

    Thanks again

  • Loretta Northcutt
    Loretta Northcutt Aug 31, 2010

    An INIT is in industry initialization. You are literally going through the service menus. That the television is doing what it is doing indicates that when you go into the service menus you will see a number by lamp errors. That number will have to be cleared or the television will not turn on anymore without being forced on. Yes when you replace the main board an INIT including clearing any lamp errors will have to be completed.

    You must unplug the television and hold down the volume - and input button on the television set. Hold down and keep holding them down while plugging the television in. Keep holding them down until the green K appears on the screen. Then When you see the K press and hold down the volume - and channel down buttons on the television set until you get to the service menu. Then with the remote control use the channel down button to scroll down to lamp errors you may have to press the enter button and the <--- or ----> to clear them and them press enter. Then use the down arrow to go to page 2 of the service menu and press the ---> on INIT + cause to turn it on then press the enter button

    When the screen turns green unplug the set for half a minute.

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