Barry & Nikki wrote:
Well I appreciate the advice. At least I now know a little more about
the "path" of what leads to the amp output block. I know there is
some other parts that are obviously bad but I did not have a clue
where to begin and I did not want to waste the time looking at
everything being there are a lot of components. Now I have at least a
few more items to check out before putting in my last two IC's. I
actually did replace a few of the 2SC3181 because they did test bad
as well.

"Dani" wrote in message
oups.com...
You usually have to also replace the 2SC3181, as well as the 2SA1264
outputs, & look for surface mount 220 ohm resistors
right by the outputs. They usually go also, make sure the mica
insulators are in the right location. These Pioneer units use
a 'self destruct' trigger that activates if the bias drifts which is
designed to intetionaly destroy the ouput transistors & blow the
fuse. Use fresh heat sink compound on the outputs to keep them cool.
Finally make sure the speakers that were on
the amp before it blew have good woofers, as this will blow it all
again. Hope this helps, Dani.

Don't give up on AC powered stuff just because of a bad experience on this
Pioneer model. Lots of people had bad experiences on these. It was a stupid,
bad design to start with. If you need me to fix it for you, I can - I have
an M-4000 "test bed" to hook it to.

Mark Z.