18 May
2010
18 May
'10
11:44 a.m.
Yes "blipping" the coil with a 9V battery
moves the heads. When the
drive
was powered on I also measured the voltage by
attaching a probe to
each end
of the coil cable, in that case I measured about
1.3V only. So I am
guessing
the coil is OK. Next step is to swap the boards
back again.
And then fix the real fault :-) The problem for me is how to diagnose this. I am
pretty sure the motor is up
to speed. However one thing that does seem slightly odd is that it starts to
spin the disk down quite soon after power up. Previously with the old
Is it possible it doesn;t think the motor is properly up to speed? I
wonder how it senses that? if it thinks there's a problem with the motor,
it will spin down fairly quickly.
-tony