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Sansui au 317 power amp problem

Discussion in 'Exclusively Sansui' started by Steve Pitts, Jul 15, 2017.

  1. Steve Pitts

    Steve Pitts New Member

    Messages:
    1
    Anyone willing to offer a little troubleshooting help? I am working on a Sansui AU 317. Dead left channel. I have isolated the problem with to a stage just after the input fet IC on the power amp board. TR01 collector has a nasty corrupted signal instead of a nice sine wave. I checked the input fet and all of the adjacent transistors with a transistor analyzer. They are all good. Do1 also checks ok. Tr_01.PNG
     

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