7 Apr
2012
7 Apr
'12
2:38 a.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Rob Jarratt
Sent: 06 April 2012 23:16
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: RD53 Disk Not Rotating
RD53,
> Common causes of problesm with the spindle
motor electronics are the
> power transsitors that drive the motor windings, whcih are easy to
> test
I don't know how familiar you are with the motor control board on the but there appear to be a total of 8 largish
transistors along the two
edges of
the board (4 on each side), attached to the casing to
dissipate the heat.
I assume these are the ones you mean, correct? I will swap the motor
control board from another disk first. I know you don't like board
swapping,
but it seems like a quick way to narrow down where the
fault might be.
Regards
Rob
Swapping the motor control board did indeed resolve the problem. So now I
can look at the faulty board and see if one of the power transistors on
there has failed.
Thanks
Rob