On Wed, 18 Aug 2010 19:52:15 -0500, "William R. Walsh"
m wrote:

Hi!

Receiver is in a cabinet with little ventilation. Obviously likely to be a
heat related problem.

You should move it to a place where it can get better ventilation. Some of
these run quite hot.

I pulled the shelf above to give it more room. Put a little fan on
a stand, directed flow to the chassis vents. Ran for maybe a couple
hours before audio failed again.

Is this receiver losing power totally, or do some functions (like the
display and tuning buttons) continue to work?

The front display panel remains lighted. Looks normal but no sound.
Jiggling wires has no effect.

If it does, I'd bet that it's
going into protection to save your speakers from a disaster. Most--if not
all--of these units used Sanyo hybrid audio amplifier ICs (a large
many-legged black thing) and I think it's safe to say those were the weakest
point of them. They don't like heat and it seems like Technics skimped on
the heatsink in many of these units.

Could be for all I know. I'll put the unit on my work-bench today, take a
closer look.

I actually have 2 SA-R210 receivers. Both have problems. The other one,
with bad power switch and maybe cracked audio output joints, has been
pressed into service.

Thx,
P

"Law Without Equity Is No Law At All. It Is A Form Of Jungle Rule."