1amplifier channel quieter now (?)

[kwkshift]

My Pioneer SA-8100 has recently started acting up. It's all original and I only gave it a deoxit cleaning when I got it a couple years ago. Recently, the right channel has lost some power and is noticeably quieter than the other.

What should I check or is it due for a service/ recap?

Thanks.

 

[avionic]

Possibly another Deoxit treatment. Slide switches are almost impossible to get a good deoxit treatment without disassembling them.

 

[kwkshift]

I went through it again yesterday with some DeoxIt and it’s working well, again.
I did notice that when I was putting it back in it’s home, I slightly bumped it against the cabinet side and the problem came back with the right channel being quieter.
I wiggled the RCA’s on the back, and bumped the amplifier again a couple times with my hand and it started working properly.
I guess there’s a loose connection somewhere in there, near the back panel of the amp. (?)

 

[Binkman]

Most likely with the 'bump test'... very common diagnostic method. You can also probe around with a pencil or non conductive stick of sorts.