Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!ukma!nrl-cmf!ames!ucbcad!ucbvax!utzoo.UUCP!henry
From: henry@utzoo.UUCP
Newsgroups: comp.laser-printers
Subject: Re: LW fuser problems?
Message-ID: <8711242112.AA22813@brillig.umd.edu>
Date: Mon, 16-Nov-87 19:21:22 EST
Article-I.D.: brillig.8711242112.AA22813
Posted: Mon Nov 16 19:21:22 1987
Date-Received: Sat, 28-Nov-87 11:07:32 EST
References: <8711121801.AA08578@brillig.umd.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 23
Approved: laser-lovers@brillig.umd.edu

> A recent issue of MacTutor reported that some (heavily used?)
> LaserWriters have been seen to have fuser roller damage caused by
> constant contact with the rubber guides above the roller.  They said
> that there is no known fix for this problem, short of rebuilding the
> engine.  Does anyone know more about the potential for trouble here?

We have seen this in our LaserJets.  There is no fix in the sense of
preventing it from happening, at least not that we know of.  However, it
is possible to replace either the whole fuser assembly or just the
roller.  The fuser assembly costs a few hundred $; the roller is much
less expensive but replacing it is more work.  Our electronics man, who
has replaced two rollers for us so far, says that replacing the roller is
several hours' work and that replacing the whole fuser assembly isn't
trivial.

The form of the damage, by the way, is that grooves get worn in the
Teflon coating on the roller.  Eventually they start to pick up toner,
resulting in vertical black streaking.  (Oh, also, the rubber guides
actually sit below the roller in operation, although they're above it
when you open up the fuser to look.)

				Henry Spencer @ U of Toronto Zoology
				{allegra,ihnp4,decvax,pyramid}!utzoo!henry