[comp.sys.mac.hardware] LWII toner cartridge smudgies?

nvi@mace.cc.purdue.edu (Charles C. Allen) (02/01/91)

[I can't seem to find a more appropriate newsgroup that's had any
traffic in the last several months.]

We have a LWII NTX that sometimes produces pages with a 1/8" black
smudge down the right side of the page.  Once it starts doing it, it's
essentially continuous.  Putting in another cartridge "fixes" things.
Reinstalling the "bad" cartridge brings back the smudgies, so the
problem definitely seems to be with the cartridge.

Any ideas or experience with this?  The cartridge had printed about
5200 pages, but the toner light had not yet come on.

Charles Allen				Department of Physics
Internet: cca@physics.purdue.edu	Purdue University
HEPnet:   purdnu::allen, fnal::cca	1396 Physics Building
talknet:  317/494-9776			West Lafayette, IN  47907-1396

adishian@dorm.rutgers.edu (Aram Adishian) (02/01/91)

nvi@mace.cc.purdue.edu (Charles C. Allen) writes:

>We have a LWII NTX that sometimes produces pages with a 1/8" black
>smudge down the right side of the page.  Once it starts doing it, it's
>essentially continuous.  Putting in another cartridge "fixes" things.
>Reinstalling the "bad" cartridge brings back the smudgies, so the
>problem definitely seems to be with the cartridge.

	Oh the top of the cartridge is a slot.  Inside this is a wire,
called the corona wire.  It needs cleaning.  You can use the green
brush that comes inside of the printer or a Q tip.

	Sometimes the drums wears out, but we encounter this problem a
lot at our labs and it is almost always the corona wire.

Aram Adishian
adishian@dorm.rutgers.edu

pj@pnet51.orb.mn.org (Paul Jacoby) (02/03/91)

Toss the cartridge.  This happens with our LW IINtx all the time, and is
typically a sign that the cartridge is dead.  I haven't actually dug into the
cartridge to see if part of it is worn or some such thing, but replacing the
cartridge always makes the problem go away.

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adishian@dorm.rutgers.edu (Aram Adishian) (02/04/91)

pj@pnet51.orb.mn.org (Paul Jacoby) writes:

>Toss the cartridge.  This happens with our LW IINtx all the time, and is
>typically a sign that the cartridge is dead.  I haven't actually dug into the
>cartridge to see if part of it is worn or some such thing, but replacing the
>cartridge always makes the problem go away.

	Sure, becuase the problem is usually inside the cartrige
itself.  As I mentioned in a previous post, the corona wire in the
slot on top of the cartridge probably needs cleaning.  If you are on a
budget where you do not have to worry about the number of cartridges
used, you can just toss the cartridge, but if you just clean the
corona wire, you can get more life out of the cartridge.

	We know this.  We are on a budget.

	BTW, in my experience there is a point where the line caused
by the dirty corona wire actually bakes onto the drum in the
cartridge.  At that point, cleaning can be a waste of time.  It is
best to catch the problem early.

Aram Adishian
adishian@dorm.rutgers.edu

amichiel@rodan.acs.syr.edu (Allen J Michielsen) (02/05/91)

In article <Feb.3.> adishian@dorm.rutgers.edu (Aram Adishian) writes:
>pj@pnet51.orb.mn.org (Paul Jacoby) writes:
>>Toss the cartridge.  This happens with our LW IINtx all the time, and is
>>typically a sign that the cartridge is dead.  I haven't actually dug into the
>>cartridge to see if part of it is worn or some such thing, but replacing the
>>cartridge always makes the problem go away.

>itself.  As I mentioned in a previous post, the corona wire in the
>slot on top of the cartridge probably needs cleaning.  If ...

   There are several more serious and common causes.
1. Too much Humidity in the paper (exhibits, thick paper is much better than
     thin for print quality...like bond or letterhead)
2. The Cartridge has absorbed moisture from the room which became damp 
   (did the heat go off, or does the building get very chilly at nights...)
    Toner is perfectly dry and just like a sponge.  WHen it get's even slighty
   damp is smears.  SHort of baking the cartridge to try to dry it, it;s junk.
   The long term solution may be to leave the printer on 24 hrs/7days, and
   avoid coat closets and near sinks as printer houses.
3. The transfer tension seperation belt maybe at the end of it's life and
   on the verge of snapping (it will be elongated in the middle).

al



-- 
Al. Michielsen, Mechanical & Aerospace Engineering, Syracuse University
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