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Sanyo ST-21G1 dead set

I found that Shorted (K2647) MOSFET in primary section of SMPS resistors 1 ohm and 10 ohms open/burn. i try to replace then check all the primary components. all are ok but still no oscilation. i check linear side of the power supply i found 300 volts DC in Filter capacitor.

please help....

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  • djlans_12058 Sep 04, 2008

    sanyo st-21G1 dead seat and i replace k2647 ;resistor 1 ohm 10 ohm and TT2140 . i try to on it is ok but 1 day only dead set agian and i need a diagram couse the resistor are burn i cannt find the value.. help me pls......

  • Anonymous Mar 27, 2014

    the power supply cannot hold a steady voltage. I already changed the regulator but still the same result.

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There should be a small valued cap in the primary side (22ufd?) at 250V. Check that. Also, look for other small caps int he range of 2.2ufd with 200V ratings in the same general area.
Dan

Posted on May 07, 2008

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