Paul Conners prodded the keyboard with:

180 vdc, 1 hp, pm motor.

with dmm what should be the first tests? motor is in a difficult
location to examine visually so i'd like to start with electrical
evaluation.

it measures 1.2 ohms between the 2 armature leads.

thanks.

If it isn't turning, then check that it has actually got voltage
applied to it. You have to consider both the motor and controller !

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Best Regards:
Baron.