The right voltage to this motor but it is lacking torque. Turning the
"torque control" pot to maximum (upping volttage )improves things but not a
cure.
On retraction of the tape into the cassete, the motor is sluggish to respond
so the sliding guides are retracting before the tape is tensioned leaving a
loop of loose tape for a short while before total retraction,so not a brake
problem..
FF and REW are erratic/sluggish. Anyone know ,been here before, if it is
likely a bearing problem. Voltage and current seem correct to the motor and
it always starts, eventually, so not a shorted bit of rotor coils

e-mail (removing .....) electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse

Nigel,Diverse Devices,Southampton,England