Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!accuvax.nwu.edu!tank!msuinfo!frith!conklin
From: conklin@frith.uucp (Terry Conklin)
Newsgroups: comp.sys.atari.8bit
Subject: Dead XF551
Summary: Steps in, but not out
Keywords: XF551, dead, step trouble
Message-ID: <1990Apr7.175012.26627@msuinfo.cl.msu.edu>
Date: 7 Apr 90 17:50:12 GMT
Sender: news@msuinfo.cl.msu.edu
Distribution: usa
Organization: Michigan State University, East Lansing
Lines: 24

[]

Recently, my XF551 stopped working (as in died.) As this is my only 
drive for my XL, it's a Bad Thing.

The controller is fine. I have been loading things (ie. Zybex) by
stealing a drive mechanism from the TRS Mod I long enough to load
something.

Today I checked the drive and it seems that it is not stepping backward
properly. Using a logic probe, it seems like the back-step signals are
being sent, but they don't always work. As it happens, I DID see it seek
in reverse a couple times, so this is a some-time problem.

As it is, the XF551 is a pile of junk right now. I'd really like to be
able to fix this drive. Is there a case history of this with the
Mitsumis? Might it be a dead driver IC suppling inadequate step singals?

Any suggestions would be _most_ appreciated.

Terry Conklin
conklin@egr.msu.edu
uunet!frith!conklin
The Club (517) 372-3131