[Shop-talk] Audio receiver repair?

[Peter Murray]

The lower impedance should not have caused any damage, unless you cranked
the volume way up and blew the amp. It sounds like you have a power supply
inside the amplifier that has failed. Power supplies often have
electrolytic capacitors for filtering and stabilization, and they can dry
out over time and send the supply circuit out of spec. I would start there.

This page may have some helpful items:
http://www.davidreaton.com/Model_300_repair_experiences.htm

-Peter


On Wed, May 28, 2014 at 8:14 AM, Jim Franklin <jamesf at groupwbench.org>
wrote:

> I have an old Advent model 300, which was a nice unit back in the day. I
> put it in the garage and connected it to a pair of bookshelf speakers and a
> dual-speaker subwoofer. It made no noise for a few minutes and then went
> POP.
>
> THEN I read the manual which said don't plug it into 4 speakers of less
> than 8 ohms each. Mine are all 4 ohms :-\
>
> I found a blown fuse and replaced it but now it blows right away. Is there
> any way for someone mostly clueless about electronics to diagnose what's
> broke? I have a basic multimeter for tools, and I understand big electrons,
> but not the small ones...
>
> thanks,
> jim
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