6 Apr
2012
6 Apr
'12
2:15 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: 06 April 2012 19:32
To: cctalk at classiccmp.org
Subject: Re: RD53 Disk Not Rotating
heads).
I acquired an RD53 disk recently. I have just been trying it out. The
heads were stuck, as usual, but the main thing is that the disk itself
will not rotate. The locking mechanism that keeps the heads parked
releases on power up but that is all that happens.
I have not come across this particular kind of failure before, does
anyone have any suggestions for common causes of this kind of failure?
Not specifically for the RD53, but I've had winchesters that don't spin...
Firstly, I assume you openeed the HDA to free the heads, Can you try to
rotate the disks in the correct direction (obivous if you look at the Just to make sure it's not mechancially jammed.
Yes, I freed the heads, even though RD53s turn the disk if the pads have
turned to goo and stuck the arm. The disk turns freely when I turn it by
hand.
Common causes of problesm with the spindle motor electronics are the
power transsitors that drive the motor windings, whcih are easy to test
and
replace, and the hall-effect sensors inside the motor,
which are almost
impossible to get to
-tony
I have a copy of the fiche for the RD53, it is a bit hard to read but I will
see if I can find where these components are.
Thanks
Rob