I have purchased 2 of the rr930's and the first thing that goes out is the play on the foot pedal. ....then one of my machines at times does not ff or rew...or if it does, I have to press so hard on the tab that it hurts...then the other transcriber just stopped playing at all! HELP...now I have 3 of these and only one works right now..!

They can be purchased thu Bernina as a separate item.
Cheers

Try to get another foot pedal. If that works then replace.

Have you found it? Check dictationmall.com

How do you remove tape protected symbol?

If you press Play, Rew or FF and can hear something in the machine (even though the tape doesn't turn), then it's more than likely a broken capstan belt.

there is a clutch operated by foot pedal. if the clutch is continuously engaged then it will run own its own. so adjust clutch lever.

You can purchase that singer sewing machine foot control here:

http://www.sewingpartsdirect.com/foot-control-w-cord-singer-979314-031.aspx

It's possible that there's a broken wire in the cable that connects the foot control to the machine. This usually happens near the plug that plugs into the machine, or by the end that goes into the foot control.

You can usually duplicate it if you put the auto-backspace up a bit and then hold down the play pedal on the foot control. While holding down the play pedal, try moving the cable near the machine or near the foot control in a circular motion. If the machine stops, rewinds or fast forwards, then odds are that the problem is with the cable.

Sounds like a feed back, make sure the mike is off, otherwise it gives a high pitched sound.

This unit is driven by belts. I would suspect that the belts have dried up a bit and are slipping. Replacing the belts should resolve the problem.
Dan