Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!XEROX.COM!"Thomas_Logan.XSIS"
From: "Thomas_Logan.XSIS"@XEROX.COM
Newsgroups: comp.sys.xerox
Subject: Re: Can't Set Time--0572 MP Code
Message-ID: <900601-123510-7870@Xerox>
Date: 1 Jun 90 19:05:43 GMT
References: <31-May-90.12:44:19.PDT>
Sender: welch@tut.cis.ohio-state.edu
Distribution: inet
Organization: Info-1100
Lines: 14

Dave,

The problems you encounter with setting time are more than likely caused by
a faulty transformer (T1) on the AC Distribution Panel.  This transformer
provides 12vac to the Maintenance Panel, which in turn, converts it to a
5volt supply for powering the MP's logic circuitry.  The IOP also works in
conjunction with the Maintenance Panel to provide the Time-Of-Day Clock.
In nine times out of ten, the transformer breaks down over a period of
time, thus reducing the 12vac output enough to cause this failure mode.
Replacing T1 with a new Dale IPL-2329-25 transformer should solve your
problem.

Good Luck,
	Tom