You should always indicate the make and model number when asking a question!
There is fault with the servo control amplifier that drives the capstan
motor. In many of the lower end tape players this circuit is built in to the
motor itself. In the higher end players, this circuit is a separate circuit
board from the motor. Many of the higher end tape machines use a motor that
has a tacho feedback. If the tacho section is defective, the motor would be
changed to repair the problem.
In the case where the servo amp is built in to the motor, a new motor is
installed to service the machine. The other type are able to be serviced by
any knowledable technician.
--
Jerry G.
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This is weird :
motor runs faster and plays tapes comarable to playing a 33 1/2 speed record
in 45 rpm mode
panasonic RX-FS470 ( stereo radio tape recorder )
Thanks in advance for any suggestions