3 Apr
2015
3 Apr
'15
10:41 a.m.
On 04/03/2015 12:06 PM, Robert Jarratt wrote:
Yes, it is 6 transistors. All this sounds like I am
going
to have to open up the disk to get inside as the motor is
on the inside. I don't think there is a way to turn the
spindle without opening it.
Some of the older disks in this vintage had the motor
outside the HDA, and there was a little fan on the end of
the motor that cooled the heat sinks, etc. You could see it
by folding the PC board away from the bottom of the drive.
I thought the RD54 was from that family, but I might be
remembering an older drive (RD53??)
Interestingly at one point it started working again.
Then
after I put it all back together again, it stopped working
once more. In one case, it seemed to start spinning when I
changed the disk's orientation (on its side rather than
flat), almost as if it just needed a mechanical
encouragement to get it moving. But now, no matter how
many times I try, and what different orientations I try,
it doesn't work. Does any of that help with pointing the
finger at all? Regards Rob
Well, I'd try wiggling connectors some more and see
if you
can get it to spin up again. Sticky motor bearings and
stuck heads are common on older drives. They put a landing
lube on the park areas of some drives, and that eventually
glued the heads to the disk, requiring more torque that the
spindle drive was allowed to provide.
But, your drive spun down while running, which is not
connected to that scenario.
Jon