26 Oct
2007
26 Oct
'07
8:10 p.m.
On Friday 26 October 2007 22:51, B. Degnan wrote:
Question
I have a CS3 with a PerSci dual 8" internal drive that does not
recognize/respond when a disk is inserted in drive A, but drive B does
respond when a disk is inserted. Drives C and D are empty. The PerSci
dual 8" drive is the model with the one belt/on-board controller shared by
the two drives. When working correctly, the drive has a mechanical lock
that detects the insertion of the disk, engages the read head, and holds
the diskette in place. No latch arm needed. There are 4 buttons on the
front, one for each drive (A,B,C,D) - If you push the corresponding button
and there's a disk in the drive a motor ejects the diskette
automatically. Pretty cool for a 1979 micro.
Do the diskette detect sensors go bad on these?
I have one of those systems and it also has a problem with that drive. In
fact the problem was persistent enough that the disk that was in it was worn
clear at the track zero location.
I have some data on it here, and it appears that they use incandescent (!)
bulbs for things like index pulse, etc. in those drives. I strongly suspect
that these are related to the problems I'm seeing, but haven't done anything
with it pending me finding some of those rather odd connectors used to supply
power to the drive, as I'd need to make an extension for it to work on the
unit.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
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Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin