Marantz Pm-66SE

geddam · 27th April 2005, 03:55 AM

Can anyone help me out with a problem I'm having with my PM-66SE. The input fuse to the transformer keeps blowing. Each time I replace the fuse, the amp will work fine for a day or two before blowing again. Usually when I turn the unit on. Any Ideas?

jaycee · 27th April 2005, 10:58 AM

If the transformer is a toroid, look for an inrush limiting circuit. Check if it works.

Also check the main psu capacitors haven't gone faulty and are drawing excess current.

anatech · 28th April 2005, 02:15 AM

Hi geddam,
Is it possible you put a fast blow fuse in where there was a slow blow fuse? That would do what you are seeing.

-Chris

27th April 2005, 03:55 AM	#1
geddam diyAudio Member Join Date: Apr 2005 Location: San Francisco	Marantz Pm-66SE Can anyone help me out with a problem I'm having with my PM-66SE. The input fuse to the transformer keeps blowing. Each time I replace the fuse, the amp will work fine for a day or two before blowing again. Usually when I turn the unit on. Any Ideas?

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27th April 2005, 10:58 AM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	If the transformer is a toroid, look for an inrush limiting circuit. Check if it works. Also check the main psu capacitors haven't gone faulty and are drawing excess current.

28th April 2005, 02:15 AM	#3
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi geddam, Is it possible you put a fast blow fuse in where there was a slow blow fuse? That would do what you are seeing. -Chris

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