"Alisdair" bravely wrote to "All" (13 Sep 03 18:38:54)
--- on the heady topic of "Help needed fixing Sansui AU-101 amp"

Being an old amp and assuming it has been sitting unused for a long
while, I would highly suspect the most typical problem being marginal
aluminum can electrolytic capacitors. You have to ESR every electro in
the amp and change all that turn up bad. Only then you can go on to
diagnose other faults. Everyone here will offer the same advice.


Al From: Alisdair

Al hi,

Al I've just got an old Sansui AU-101 amp, and it has a few problems:
Al - there's no output on the right channel until it's been on a few
Al minutes - both channels (but particularly the right) crackle when
Al balance or volume are adjusted. Once the unit has warmed up the
Al problem with the volume goes away.

Al The sound quality is ok though once it's warmed up.

Al I've done some searches and found suggestions for similar situations,
Al like freezing transistors or replacing caps (largest first), any idea
Al what to try first? I've done some electronics in the past so I'm not
Al completely ignorant, never tried to recondition a hi-fi before though.

Al I'd appreciate any suggestions as to what to try, especially related
Al to the AU-101 in particular.

Al Thanks,

Al Alisdair

.... A fail-safe circuit will destroy others.