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Naim NAT-05 power supply board

Discussion in 'd.i.y.' started by oddrodedandy, May 21, 2020.

  1. oddrodedandy

    oddrodedandy New Member

    Just noticed a blown internal fuse in my NAT-05. Fuse blew again on replacement, so I popped the top off, and replaced the internal fuse again, it blew again. On my infra red camera attachment on the phone, the left hand diode (closest to the edge of the board) was very hot, and theres a crack in the side of it. The caps look physically fine.

    I can't work out how to attach an image to the post.

    I can't afford to ship it off for repair right now. Is it likely to be just the diode, the transformer, the caps, etc. Any bodgers between Manchester and Stoke prepared to help?
  2. Arkless Electronics

    Arkless Electronics Trade: Amp design and repairs.

    There's a reasonable chance it could just be the diode yes.
  3. MJS

    MJS Technical Tinkerer

    Based on my experiences with other Naim kit of that era then it is probably just the diode. The NAT05 was after my time but you could quickly snip it out and just try any old 1n4007 in there (I use that value because Naim seemed to settle on that variant).
  4. hp1

    hp1 pfm Member

    Hi ,
    I am near Stone if you want any help.
  5. oddrodedandy

    oddrodedandy New Member

    Thanks!!! I’ll get in touch.

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