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ARCHIVED FORUM -- April 2007 to March 2012
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This is the first Archived Forum which was active between 17th April 2007 and 1st March February 2012

 

Latest post 02-19-2012 4:08 PM by hemenex. 1 replies.
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  • 02-07-2012 5:29 AM

    • zeloff
    • Not Ranked
    • Joined on 02-07-2012
    • Posts 1
    • Silver Member

    Beomaster 3400 blowing primary fuses

    Hi everyone.

    I'm a proud owner of a Beomaster 3400, which blew the primary fuse a few days ago. I really would prefer to fix it myself (or try my very best) than to send it to the butchers on the official B&O repair service here in Portugal. The last time I sent it there it came back missing a few parts, namely the metal 'rods' that held the cover up when opened and the aluminum spacers thay lay between the wooden frame and the panel itself, plus a misplaced linear pot and they failed to tell me they didn't fix the tuning dial string thing-y which had broken off, although I requested it...

    Long story short: it's blowing the primary fuse and if it's a simple repair I'd very much rather do it myself. Does anyone have a clue on where to look?

    Although probably unrelated, the D8 rectifier has failed in the past. Testing the four 1N4007 diodes the official B&O repair service here in Portugal soldered together showed one of them was gone and I replaced the whole thing with a W01M.

    Also, somewhere along the way someone put a 1A (fast) fuse between the secondary and the D8, and TR8 has also been messed with. Does anyone have the original specs of D8 and TR8?

    All the best

    Zé Loff

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  • 02-19-2012 4:08 PM In reply to

    Re: Beomaster 3400 blowing primary fuses

    zeloff:
    the original specs of D8 and TR8

    As noone seems to step in....

    TR8 is BD136, D8 was B40C800

    zeloff:
    between the secondary and the D8

    There IS a fuse secondary just before D8 (F3) - but it's 1AT (slow)

    Which primary fuse blows - F1 or F2?

    The audio power amplifier has a strange design - if it fails it's supposed to blow F1 through a triac Confused

      Gunther

     

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