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Decoupling caps on the output stage of the amp... Is this stereo...?
If no then most definately look to the output stage.....
Coupling cap from first stage to output stage, and associated parts...
Be sure you check the speakers....
If a strong bass thump comes along and it seems like the thing momentarally
shuts off, then look to the power supply, if not its in the amp....
A lot of those sets had a good size cap coupling the push pull amp to the speakers....
check the cap, resistors, transistors, caps to ground...
Check everything carrying the lion's share of current in the output stage....
Be sure the power switch is working properly.....
You can easily have one of the output transistors with an open emitter or collector
and be lacking in proper drive current to drive the Whooffer to it's propper Whooff- !
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Last edited by Username1; 10-31-2014 at 09:12 AM.
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