|
On the older SL-8200 and 8600 era machines, there's a series of switches that are the 20-ish pin connection slide type similar to what audio recorders used for the record changeover switch. These mechanical critters tend to get dirty and noisy, which would explain the change in whistling when tapping. Deoxit does wonders. I'd look for it on the main motherboard on the bottom. You'll have to remove the entire bottom to access. Often two or more of the connections act as convenient hinges so be sure not to unscrew them by mistake.
|