You should checdk the bias, page 34 of the SM. I'm somewhat hesitant in posting this, since what you've been through, however it's part of normal maintenance.
Maybe take the readings and post without attempt to adjust.
My listening chair position is pretty much nearfield, the amp is normally close enough for me to reach out with my toe to turn the volume knob.....that's my remote for all amps
I had a Marantz cd-72 without a remote, I got one for cheap on e-bay from china, it worked well.
You should checdk the bias, page 34 of the SM. I'm somewhat hesitant in posting this, since what you've been through, however it's part of normal maintenance.
Maybe take the readings and post without attempt to adjust.
Seen problems with other amps when switching between AB and A. I'd be inclined to power off before switching, including the bias procedure.Now when you switch between class A and AB, going by the manual, you are supposed to turn the amp off first.
Many of them are like that. But it's not the pot's fault.These pots are RUBBISH! I breath near them with a blade screwdriver I made out of a timber fork (didn't want to slip while adjusting and short it out all over again!) and I get a jump of dozens of mV with barely a touch!