4 Jul
2007
4 Jul
'07
3:32 a.m.
Tony Duell wrote:
I'm guessing it is: There's an external motor in one corner of the unit; I
can't read most of the label, but the "0.9 deg./st" that I can see would
suggest it's a stepper.
It spins up,
by the sounds of it, but is not talking to the computer.
There's no head noises of any description.
Is it old enough to be a stepper motor positioned? Some of those do not
restroe to cylinder 0 at power-on, so the heads won't move unless told to do
so by the controller board. It's possible there's a problem with the
controller, therefore. >
> Where would I start in trying to diagnose & fix this drive? I have an
elderly
> oscilloscope, but little else in the way of
diagnostic tools (no logic
> analyser, for example). Or am I better off considering it scrap & trying to
> find a working replacement? Personally, I'd prefer to resurrect this one if
I
> can.
I assume this is a normal ST506 interface. I'd
start by looking at the
signals there -- is the machine trying to select thr drive, does it send
STEP pulses, and so on. At lest then you'll know which drvice (controller
or deive) has the problem
OK, that will give me something to work on, once I've figured out how to
re-assemble the thing whilst leaving the control board accessible....
I couldn't tell you if this was a normal ST506 i/f. The control board on the
drive has "TM600 uP 187345" printed on it; the Sirius' controller board has
only "XEBEC SYSTEMS INC." and "Assy 104526 rev-07" as identifying
marks.
Does any of that help at all? I've not looked for any schematics yet, I guess
that's the next thing to do.
Cheers,
Ade.
___________________________________________________________
Yahoo! Mail is the world's favourite email. Don't settle for less, sign up for
your free account today
http://uk.rd.yahoo.com/evt=44106/*http://uk.docs.yahoo.com/mail/winter07.ht…