[Barry777]

I have that one too, that is one beautiful machine. I hope and pray that you never need to remove the front panel, because it is an absolute nightmare to snap back into place and get all the switches lined up properly on the slanted portion. The worst I've ever seen in 40 years of electronic servicing. Mine works perfectly, except the drive motor is mildly intermittent and only malfunctions after the machine is all put back together and at the bottom of a stack on top of the TV.

Quite a shame. I ended up having to put a voltmeter AND ammeter on the motor to make sure it wasn't the driver chip. Sure enough - current quit and voltage stayed. Took motor apart, cleaned the brushes and replaced the anti-spark caps, worked great as long as it was on the bench!

On the muffled audio, have you tried gently tweaking the A/C head azimuth or front-to-back tilt? Usually a tiny adjustment will clear it up.