Re: CBM Drive Mechanisms

From: Nicolas Welte (
Date: 1999-08-16 12:41:37

Geoff Oltmans wrote:
> I guess I should have been a little more specific in my original post. I
> have isolated the problem to the spindle motor control board, since: A. an
> exact replacement mech works just fine in the machine. B. Spindle bearings
> are free with no excessive play. You CAN get the drive motor to spin if
> you give it a bit of a push-start by hand, but 9 out of 10 times the thing
> won't start on its own.

I wouldn't be so sure that the spindle motor is still okay. Did you try
to exchange the spindle motor control PCBs between the two drives?

I had a spindle motor problem on a 8250, the control transistor was
running hot and the drive wouldn't come up to full speed. It was a
spindle motor problem, opening the motor and cleaning the contacts
helped. Obviously carbon residue was sitting between the contacts and
causing some sort of short circuit.

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