8 Apr
2012
8 Apr
'12
12:58 a.m.
Rod,
You may have missed the other emails on this. I have isolated the fault to
the motor control board.
I have tested the power transistors on the board, although it seems that I
have not tested some of them in the correct manner, will try to do that
today. There does not appear to be a printset available for this board,
although it is small enough that I may be able to draw it out for someone
who has the electronics knowledge to direct me what to test.
Regards
Rob
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Rod Smallwood
Sent: 08 April 2012 07:05
To: 'General Discussion: On-Topic Posts Only'
Subject: RE: RD53 Disk Not Rotating
Yup! dead drive motor or something in its servo loop.
Regards
Rod Smallwood
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-
bounces at classiccmp.org]
On Behalf Of Rob Jarratt
Sent: 06 April 2012 16:32
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RD53 Disk Not Rotating
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?
Regards
Rob