jtb@eisx.UUCP (J. Burgess) (07/02/85)
I have a Fourth Dimension disk drive on my Apple ][+.
It READs just fine. (Well, actually the heads are getting a bit out of align,
but that's a different story...)
Anyway, I cannot WRITE to it at all.
I've tried the following:
unplugged the pairs of leads to what appears to be a LED and sensor
on opposite sides of the write-protect notch. Then:
a) left either-one/both "open"
b) left one/both "wired" (i.e., I put a short wire from one pin
in the connector back into the other pin.)
c) shorted the "write-protect" pin (#19???) on the
connector to the disk controller to +5.
d) various combinatons of the above.
Whew. At least I didn't destroy anything!
The result is consistent in both drives 1 and 2. ... no luck.
Meanwhile my Apple-brand disk keeps on humming, four years later.
Questions: Why didn't at least one of the above work?
What CAN I do to be able to write on it?
(and at the same time still be able to control w-protect, if possible,
even if via external, manual switch!)
And on my other problem, what luck have people had in adjusting disk drives?
Is it a procedure that a software-type (i.e., 8-of-10-thumbs around
a soldering iron) can handle? How long does it take?
I have A.P.P.L.E.'s disk-analyzer, which has zillions of warnings
and caveats. Are they over-doing it or what?
If I go to a store, how much is it likely to cost?
Thanks, world.
John Burgess
--
John Burgess
ATT-IS Labs, So. Plainfield NJ (HP 1C-221)
{Action Central}!eisx!jtb
(201) 561-7100 x2481 (8-259-2481)