ss wrote:
On 05/05/2021 03:31, Paul wrote:
ss wrote:
Just trying to understand this as I have a new cartridge which I can
install if necessary.
When I print I intermittently get faded black marks on the page, they
are regular markings so obviously coming from one of the rollers, if
I do nothing the page sometimes comes out clean for a 30 page run
then I get some ghosting and it eventually reverts back to a clean page.
I have dismantled the cartridge a couple of times, emptied what I
think is a collector compartment for excess toner and cleaned all the
rollers.
It then prints ok for a number of pages and then goes back to
ghosting (intermittently) If I do a run of printing its either all
pages clean or all pages with ghosting. The ghosting is on one side
only about 3cms wide.
I have never had this before with a toner cartridge so hoping someone
can identify what the issue is.

I am just curious as I will replace the cart if the problem becomes
excessive. I am on approx 3500 pages with this cart and refilled
once, I normally get around 5000 before it stops working due to the
chip.

Corona wire ?

If you tell us the model number, there might be a nice
manual with a picture of what to clean.

I only had to clean corona wire a couple times at work,
so as a maintenance item, it doesn't come up all that often.
(I'm the guy that pulls all the crumpled paper
out of the printer, when nobody else could be bothered.)

Paul
Samsung ML-2240 laser printer.
I have measured the ghosting image and it repeats every 38.2 mm which
would be approx a roller of 12.16 diameter, all of which I have
previously cleaned.

They mention the fuser unit and the transfer roller as
maintenance items, but there's no diagram showing
how to change out the transfer roller. It is referred
to as a "black roller", so maybe it has a rubber sleeve
on it ? There is no mention of a corona wire.

http://h10032.www1.hp.com/ctg/Manual/c05753018.pdf

And the Troubleshooting chapter doesn't mention ghosting.
They claim there is dirt on the paper path if "white spots
appear on the print", presumably with a stimulus of an
all-black page. Maybe the white spots are caused by paper
fibers.

But generally speaking, the design doesn't have a lot of
troubles, so no suggestions. If it was the transfer
roller, you're supposed to be able to buy a new one.

Paul