Dear Bijan,
The high speed error could be the result of corrosive damage of the lower board nearby the single electolytic capacitor. It is a known fault and as a result the motor speeds up. Please read all the messages for Philips DCC 130 which should be clone of your panasonic.
To fix this error a wire patch is needed. I had this error with two of my units after replacing belt and capacitors.
Please check in forum this header for placement of the patch:
DCC130 not playing digital tapes but when playing analog tapes it is playing fast
Hope this helps !
Good luck
Michael