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Sony KV-27EXR15 and STRS6301

Discussion in 'Electronic Repair' started by Ziggie, Nov 29, 2004.

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  1. Ziggie

    Ziggie Guest

    Hello,

    Friend brought this to me, so far I found not functioning IC 651 in
    converter board.
    Searched the net on this to find out that this is a common problem and it is
    hard to find the Sanken chip and not to be taken by a fake (read chip)
    replacement.
    So far I have following voltages on the chip, with reference to pin 7
    Pin 1 168 volts
    Pin 2 0 volts
    Pin 3 10 volts
    Pin 4 0 volts
    Pin 5 0 volts
    Pin 6 0 volts
    Pin 7 0 volts
    Pin 8 10 volts
    Pin 9 0 volts

    Got the datashet for the STRS6301 chip, drew the schematic of the primary
    site of the converter, all points bad IC, as I do not see so far any other
    problem, HOT is not shorted etc.
    Is there anything else that always goes on this set and where I can get the
    right part.

    Ziggie.
     
  2. Greg M

    Greg M Guest

    I usually replace this ic with all ecltrolytic caps on the pc board and have
    no more problems. Remember to resolder the hor drive transformer.

    Greg
     
  3. Jerry G.

    Jerry G. Guest

    In this model, we used to change the inverter IC, and all the caps on
    the board. Usually the set worked after, unless there were other
    problems as well. But, going by your readings, the first step is what is
    mentioned here.

    --

    Jerry G.
    ======

    Hello,

    Friend brought this to me, so far I found not functioning IC 651 in
    converter board.
    Searched the net on this to find out that this is a common problem and
    it is
    hard to find the Sanken chip and not to be taken by a fake (read chip)
    replacement.
    So far I have following voltages on the chip, with reference to pin 7
    Pin 1 168 volts
    Pin 2 0 volts
    Pin 3 10 volts
    Pin 4 0 volts
    Pin 5 0 volts
    Pin 6 0 volts
    Pin 7 0 volts
    Pin 8 10 volts
    Pin 9 0 volts

    Got the datashet for the STRS6301 chip, drew the schematic of the
    primary
    site of the converter, all points bad IC, as I do not see so far any
    other
    problem, HOT is not shorted etc.
    Is there anything else that always goes on this set and where I can get
    the
    right part.

    Ziggie.
     
  4. These IC's run hotter than hell! When you install the new one , make sure
    you clean the heatsink extremely well and apply a fresh " thin " coating of
    heatsink grease....not a ton of it , just a thin coating.

    Buy from a reputable Sanken parts distributor.


    Make sure you resolder the board up really well. On your main board also
    resolder all the heatsinked devices , connectors and transformers.

    --
    ==========================
    Jeff Stielau
    Shoreline Electronics Repair
    344 East Main Street
    Clinton,CT 06413
    860-399-1861
    860-664-3535 (fax)

    ========================
    "If you push something hard enough it will fall over."
    Fudd's First Law of Opposition - Sir Sidney Fudd
     
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