hifi engine

pioneer sx550

my little 550 needs help.The sound on the right side fades out after unit is turned on.
Bought new in 76. Is it worth fixing,If so who can repair it.

Re: pioneer sx550

I would first clean all the controls and switches (like tape switches, etc). Also the contacts in the protection relay, if used. Next I would check for poor solder connections in the pre-amp and power amp sections. Any good tech should have no problem with this.