[comp.sys.hp] fuser roller

davidb@Pacer.UUCP (David Barts) (08/08/90)

We have an HP LaserJet Series II that we use as the primary printer on
an HP-UX system with about 20 users.  It gets fairly heavy use, and
about six months ago when changing the fuser roller cleaning wand, I
noticed that what appears to be a (non-stick?) plastic coating on the
roller had gotten a scratch all the way around its circumference in one
place.

The scratch at first made no difference in print quality, but it has
been growing gradually wider and now sometimes you can see a line down
the page where the scratch is, so I guess its time to do something
about it.

I called our local HP sales office and they said I'd need a new fusing
assembly (part No. RG1-039-00CN).  I was told that we must buy the
whole assembly and we couldn't buy just the roller.  (In case you don't
know, the fusing assembly is the part with the green felt door that
says "Danger--HOT!  Do not touch!" in at least four languages.)

I just want to verify that everything I have been told is true before
we order the new assembly.  In particular, I'd be interested to know if
it is possible to just replace the roller (since it's the only part
that needs replacing).  Also, how hard is it to replace?  Naturally the
sales rep said I'd better let an "expert" install it but I've fixed
electrical and computer equipment before so unless its really a nasty
chore I'll probably replace it myself.

-- 
David Barts			Pacer Corporation, Bothell, WA
davidb@pacer.uucp		...!uunet!pilchuck!pacer!davidb

edwin@praxis.cs.ruu.nl (Edwin Kremer) (08/08/90)

In <333@pacer.UUCP> davidb@Pacer.UUCP (David Barts) writes:

   | We have an HP LaserJet Series [...]
If I remember correctly, the HP laser is built around a Canon
unit; the Apple LaserWriter uses the same Canon unit.

   | about six months ago when changing the fuser roller cleaning wand, I
   | noticed that what appears to be a (non-stick?) plastic coating on the
   | roller had gotten a scratch all the way around its circumference in one
   | place.
We've had the same on one of our Apple laserwriters: the coating (Teflon ?)
was ripped off by one of the scrapers at the far outside. This happened
after appr. 200.000 copies.

   | I called our local HP sales office and they said I'd need a new fusing
   | assembly (part No. RG1-039-00CN).  I was told that we must buy the
   | whole assembly and we couldn't buy just the roller.
We had our LaserWriter repaired: the engineer replaced the fusing assembly,
but told us that it **is** possible to replace only the roller. Replacing
the entire assembly is very easy to do (took about 10 minutes, including
cleaning); he said replacing only the roller requires a fine two hours work
(and keeping the engineer fee per hour in mond, it is probably not worth
trying). If you manage to do it by yourself, the hardest thing to do is
probably to order just the roller :-)


				good luck,
						--[ Edwin ]--
--
Edwin Kremer (SysAdm), Dept. of Computer Science, Utrecht University
Padualaan 14,   P.O. Box 80.089,  3508 TB  Utrecht,  The Netherlands
Telephone: +31-30-534104  | UUCP: ...!uunet!mcsun!hp4nl!ruuinf!edwin
Telefax  : +31-30-513791  | Email: edwin@cs.ruu.nl    [131.211.80.5]