Tech: Rowe AMI R-89

I've been experiencing an intermittent problem with my Rowe AMI R-89. It plays
perfectly but at times goes into a mode where it picks up a record and places
on it on the turntable, then picks the record up again without playing it and
repeats this process.

Other times the record does start to play then this process starts before the
record has played all the way through. The first time this happened a few
months ago I tried to troubleshoot it and the problem stopped and the unit has
played perfectly since then. Today it started acting up again. Any ideas what
may be causing this problem?

Thanks,
Ray