Fault and repair guide
Stops in play or recordThe first thing to check is that there is adequate torque on the take up spool. If there isn't much then the cause is usually down to two contributing factors.
The first is the drive pendulum which can cease up and the second, and the second more serious factor, is wear on the reel motor bottom bearing. The pendulum is simple to replace but the bearing is moulded into the chassis and replacement necessitates that the entire chassis be replaced. One possible compromise is to fit a small piece of plastic into the bottom bearing to raise the rotor and allow it to move freely. Sony supply a repair kit for this purpose.
No head drum rotationYou may find that the head drum fails to rotate. This is due to a problem with the Hall effect device on the head drum motor which is secured by a blob of glue. Full details on how to fix this can be found on the head motor page.
Deck goes into rewindThis can be caused by failure of the tape end sensor. You can check this by unplugging the sensor at its socket on the PCB.
Failure to load a tapeThe cassette carriage can fail to operate. This is caused by breakage of the plastic gears in the side of the mechanism. When this happens they have to be replaced.
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