12 Aug
2009
12 Aug
'09
11:54 a.m.
Date: Tue, 11 Aug 2009 21:54:16 -0500
Subject: HP 4100 printer, is this a bad toner cartridge or roller kit?
From: brianlanning at gmail.com
To: cctalk at classiccmp.org
Hi everyone. I'm ready to do the last fix on the hp 4100. Looks like
I fixed the mangled paper problem. I managed to pull a loose 1/8"
thick 1" square piece of black plastic out of the printer. So the
paper path is looks right now.
The last problem is a print quality problem. The left 1/2" of the
page prints strangely with some ghost images, from higher up the page
or the last page, copied every few inches down the page. This sounds
to me like the toner drum, but since I don't know exactly what the
roller kit is for, I'm not sure if that's the problem. Is the toner
not coming off of the drum and on to the page? Or is the drum
supposed to be cleaned off with something between pages and it's not?
Any ideas what's happening?
brian
Hi Brian
On an HP, this is most likely the toner cartridge. It is not usually
the drum that is bad though. It is a thing called a PCR. This is inside
the toner cartridge. It often gets covered with toner and will
cause ghosting. They can often be cleaned but it does require
opening the cartridge. This usually happens when the toner has
not been used for a long time and the rubber in the PCR breaks
down and becomes gooy (sp?). It then gets a coating of toner
that insulates it.
There is also a wiper that can fail. It removed the loose toner
that the PCR removes the difference in charge from. If that isn't
making good contact, it will also cause ghosting.
So, as you can see, both can case ghosting.
A drum failure is usually blank spots.
Dwight
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