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From: laser-lovers@uw-beaver
Newsgroups: fa.laser-lovers
Subject: Canon-engine wires causing smudging?
Message-ID: <1008@uw-beaver>
Date: Tue, 9-Apr-85 13:36:05 EST
Article-I.D.: uw-beave.1008
Posted: Tue Apr  9 13:36:05 1985
Date-Received: Wed, 10-Apr-85 06:04:16 EST
Sender: daemon@uw-beaver
Organization: U of Washington Computer Science
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From: ihnp4!utzoo!henry@uw-beaver.arpa

We're encountering an odd problem on one of our LaserJets.  Almost
certainly the problem is in the Canon print engine, so it should be
generic to other small-Canon-based printers.  Low on the page, in two
quite distinct vertical bands, we get what we've been calling "the
smudgies":  the characters themselves are clear and sharp, but they've
also got gray shadows underneath them.  The severity varies.  The only
correlation we can find with the physical structure of the printer is
that two of the diagonal wires which keep the paper out of the slot
holding the transfer corona wire are in just the right places to line
up with the bands in which the smudgies occur.  Cleaning the wires does
not help, nor do any of the routine cleaning operations.  Putting in a
new toner cartridge does not consistently help.  It's annoying enough
that we're thinking of calling in maintenance, but first... has anyone
got any thoughts on this?

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