Printer Head Stepper
Confirm that you simply don't have bad solder connections
around the plug to the motor. This is common in printers and will
result in erratic or incorrect motor movement.
(From: Ralph Wade Phillips (ralphp@gcstation.net).)
What's common in some older Okidata 32x's and 39x's
is that the lithium battery *above* the stepper driver will spring
a leak, and drop the lithium compound onto the legs of the stepper.
I do not know for sure if it's corrosive, conductive, or just plain
nasty, but it kills the stepper deader'n'snot.
I'd LOVE to find a replacement - I've got a service
customer that has about 2,500(!!!) 320's and 321's in the field,
and I am not looking forward to having to exchange all those boards
over the next several years.
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