found it, open junction on one of the small transistors (C556)
had to take it out to test it properly.


Mark D. Zacharias wrote:
bigtom wrote:

KENWOOOD KA-31 Amplifier

the left channel on this amp sounds distorted at lower volume and cuts
out at med to high volume.
i tried swapping the speakers but its definitely the amp
ive esr'd the caps on the main board but theyre ok.
there are 4 big transistors on heatsinks and 4 small ones next to them
they all test ok on a dmm set to diode test(readings are not exactly
the same, but close)
what should i be looking at first?


Solder connections, relay contacts, speaker switches...

Maybe a transistor has an open junction.

A 'scope would help. Often these types of problems are intermittent, and
pushing, poking, tapping around can lead to a suspect...

Mark Z.