Hello all...
I thought that I'd clean the badly pitted contacts on the protection relay in my Technics SA-560 receiver and got a little carried away. Turns out I broke some of the fine turns of magnet wire on the coil while I was trying to open the relay's case. So while I wait for my replacement relay, I pulled a little SA-310 out of storage.
The SA-310 basically works fine, but I've noticed that if I turn up the volume up high, the left channel starts to become weak and distorted. Turning the volume back down restores perfect sound. The controls are clean. I'm thinking it's a power supply problem, maybe weak filter caps not being able to keep up with the increased power demands. It dates from 1983, so maybe it's due for some maintenance...
Any thoughts on this? Am I on the right track?
William