28 May
1998
28 May
'98
3:12 a.m.
On 27 May 98 at 20:16, Tony Duell wrote:
On a related note, I have 3 Atari STs all with failed fdds. Any tips on
re-alligning these with-out the rather expensive reallign equipment ? Quite a
while ago I was able to revive another one by trial and error ,fiddling with
the head placement. More blind luck than skill. I've heard that most 3 1/2 fdds
will work by reversing the P-S connecter and I picked up a 720k Mitsumi to that
end recently to no avail. So rather than throwing away more money I would like
to try fixing the ones I have first. I have some test equipment but
unfortunately my old Dumont tube scope died the good death. (impossible to
find neon current limiter). Any suggestions ?
ciao larry
lwalker(a)interlog.com
oh well with
my 5150 it has two FH IBM drives in i and they both seem to be
dead, Ive replaced the controllor card check the dips,
checked power output, it seems here in Austrlaia these drives are almost
impossable to get a hold of......
I have schematics for these drives (in the IBM O&A TechRef) and the Tandy
instructions for aligning the single-sided version. So I think we can get
them working.
You say they're 'dead'. How dead? Why you access them, does the motor
start. Does the spindle rotate? Does the head carriage move to track 0
when you first boot up the machine (turn off, move the head towards the
spindle, turn on). Does the LED come on?
Or do they seem to work, and go through all the motions, but give you
data errors?
-tony