17 Sep
2011
17 Sep
'11
2:15 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: 17 September 2011 20:59
To: cctalk at classiccmp.org
Subject: Re: Opening up an RD54 Disk
we
It is a non-working drive (which is why I want to
open it), so I don't
have much to lose really. Thanks for the advice nonetheless.
I beleive the medical profession agree to 'first do no harm', and I think
should follow the same principle.
Yes, it's a non-working drive, but that could be due to a lot of things.
If the faultr is on the logic board, it may be able to be fixed (there are
custom ICs there, there are also a lot od standard parts). But if you open
up
the HDA, you are going to have a headcrash fairly soon
afterwards (unless
you happen to have a cleanroom...).
It's best ot avoid opening HDAs unless you know you hve to. I know I'd
have
done a lot more tests on the electronics befroe
removing that cover.
On the otehr hand, if you've undone the screws roufn the outside and freed
the gasket, you've let conaminants in anyway (5 micros is small, it
doesn't
take much a of a gap to let such particles in!), so
you migth was well go
the
full way and take the top off.
-tony
I suspect you are right (as ever) and will probably avoid removing the lid
on my other non-working ones. I don't think there is a printset though to
help with diagnosis, and I suspect that diagnosis here is going to need
expensive equipment I don't have to find a faulty component.
Regards
Rob