Path: utzoo!attcan!uunet!lll-winken!ames!bionet!agate!ucbvax!amperif.UUCP!dan
From: dan@amperif.UUCP (Dan Mehlhorn)
Newsgroups: comp.laser-printers
Subject: Re: HP series II fuser
Message-ID: <8908111548.AA10570@brillig.umd.edu>
Date: 8 Aug 89 21:10:00 GMT
References: <8907311721.AA01390@brillig.umd.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: LASER RECHARGE of Omaha
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Approved: laser-lovers@brillig.umd.edu


This is for Derrick and anyone else having fuser scoring problems.

My field engineer says, "There is a thermistor and thermal switch that are
in contact with the upper fuser roller.  The upper fuser roller is teflon
coated as are the thermistor and the thermal switch.

Canon toner (HP, Apple, QMS and others just license the print engine, the
cartridges are interchangable.) is magnitite coated with resin.  During the
heat-up and cool down cycle of the fuser toner sticks to the thermistor and
thermal switch causing wear on the upper fuser roller.  

Solutions:  Either A) Replace ALL three parts (thermistor, thermal switch,
and upper fuser roller) at the same time or B) clean the thermistor and 
thermal fuse with 91% (by volume) or 99% (by weight)  Isopropyl Alcohol.
The lower roller (the pressure roller) should be changed with the upper
roller."

Any questions to us will be answered at (402) 498-0936.  As I can only
follow up or reply to posted articles until my mailer is fixed.

                                       Dan Mehlhorn  
-- 

Every child deserves a home of his own. - Harry Holt
Dan Mehlhorn    uucp: dan@amperif.uucp
All comments are my own.  No one else should be blamed for them.