Recently bought a DCC600 which was not playing cassettes, more ingesting the tape into the mechanism. If you pressed PLAY it would play audio for about a second and then STOP, with the tape being eaten. If FFWD or REV are pressed the unit display looks like it is doing that but will STOP after about a second. There is no actual movement in the tape.
Spoke to Dr DCC who suggested it could be the gear, so I ordered one. Whilst awaiting its arrival I decided to re-belt the unit and replace the greases.
On inspection, the gear looks OK. With a DVM I can see that the wind motor is getting +10v or -10v on pressing FFWD or REV for about a second and then reverting to 0v when STOP is displayed.
My question is, it could be the motor and I intend taking it out and bench testing it, but could any of the sensors in the deck cause the CPU to select a STOP so stopping the motor from working correctly?