Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!apple!sun-barr!decwrl!ucbvax!XEROX.COM!"Hugh_E._Wells.ElSegundo"
From: "Hugh_E._Wells.ElSegundo"@XEROX.COM
Newsgroups: comp.sys.atari.8bit
Subject: XF-551 Disk Drive
Message-ID: <890804-114131-3011@Xerox>
Date: 4 Aug 89 14:19:04 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 16

It appears that the XF-551 disk drive has an inherent controller board
problem which causes the drive to go to sleep.  This caused me to open it
up and attempt to find the difficulty.  I really need a schematic diagram.

Although I haven't located the problem as yet, I did notice that the drive
mechanism is a standard IBM 1/2 height 5-1/4 drive which is easily replaced
-- plug compatible.  I appreciate that fact as 1/2 height drive mechanisms
are readily available.

I would appreciate any info available on XF-551 schematic diagrams and/or
how to resolve the sleeping problem.

Thanks,

Hugh Wells
(213) 333-7923