Kenwood KA7100. Help

Discussion in 'Kenwood-Trio/Kensonic-Accuphase' started by Shaun b, Sep 10, 2017.

  1. Shaun b

    Shaun b New Member

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    38
    Picked up a KA7100 week or so ago. It worked fine for a couple days. One morning I turned it on and it blew a fuse. I replaced it and it did it again. F3 fuse - 250v 4a. I was hoping someone smarter than me which is most of you, could advise me on where to start looking. I'm quite comfortable working inside the unit. Any help would be great. Thanks
     
  2. petehall347

    petehall347 the brandy coffee man

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    uk.. the middle bit
    shorted rectifier or a problem in main left amp section or other problem in power supply .
     
    Last edited: Sep 10, 2017
  3. petehall347

    petehall347 the brandy coffee man

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    for some dumb reason i was looking at fuse 4 . . yes of course fuse 3 is for left main amp . will edit my post .
    should make it easier to find the fault being as there are 2 supplies .
     
  4. hopjohn

    hopjohn Kenwood Krazy Subscriber

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    Dallas, TX
    Ha I thought I was wrong, so deleted my post. I had to go back and look. Agreed left side of the amp given the dual supply. Could be a short in left channel amp somewhere or possibly a bad rectifier at De19 or De23. That's where I'd start.
     
  5. petehall347

    petehall347 the brandy coffee man

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    glad it wasn't just me that got confused .
     
    hopjohn likes this.
  6. Shaun b

    Shaun b New Member

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    38
    Thanks. Work closed today for the storm so I will spend some time this morning in the shop working on it.
     

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