Red line on print Ricoh MP C2051

[slimslob]

Re: Red line on print Ricoh MP C2051

I have seen exactly the same result. A hospital was getting ready to start using a Hospital Information System. To cut costs they decided to the operating manuals for all the hospital staff. Like the sample you provided, every page had a wide colored border at the top. Magenta was one of the colors need to create the color of the border. This is caused by more toner being applied to the drum than the cleaning blade can handle. Before you go to the expense of ordering all new PCUs only to have the problem repeat within 500 or so sheets, try the following. Make sure everything is clean, including all four charge rollers and the image density sensor assembly. As long as everything is within PM standards the settings in the following document should help prevent putting too much toner on the drum and at the same time transfer more of the toner to the ITB and paper.Service Program (SP) Settings.pdf

[SteinarN]

Re: Red line on print Ricoh MP C2051

Then how did you clean it?

Sent from my SM-G960U using Tapatalk

There is one large drum, I suppose that is the "drum" we are talking about. Then there is one much smaller greyish axle/drum that rotates against the large one, and then there is one more thin cloth like axle under that again.
I removed the drum and put it carefully away letting it sit upright on one end. I carefully cleaned the small greyish one with the tip of a soft tissue in the affected area, that axle was covered with a thick layer of toner in that area. I then carefully picked on the cloth like axle with a small screw driver while I used a vacuum cleaner to suck excess toner out of it. I sucked with the vacuum cleaner close to the mylar strips too, without damaging them, and a few other places where there was excess toner. I put the drum back in place, I then rotaded the drum/axles of the assembly while I put pressure on the ends of the drum so all rotating parts was in contact like they are when the full PCDU assembly are operating. I found that after a couple full revolutions of the drum all toner had been picked up by the other axles or the film behind the drum. Removed the drum again to check behind it, sucked a little and put it all back together.

The first few printouts had some very small residue in the problem area. I changed the paper orientation from LEF to SEF, printed a few more examples and found no more magenta residue on the prints. Changed back to LEF.

[SteinarN]

Re: Red line on print Ricoh MP C2051

I have seen exactly the same result. A hospital was getting ready to start using a Hospital Information System. To cut costs they decided to the operating manuals for all the hospital staff. Like the sample you provided, every page had a wide colored border at the top. Magenta was one of the colors need to create the color of the border. This is caused by more toner being applied to the drum than the cleaning blade can handle. Before you go to the expense of ordering all new PCUs only to have the problem repeat within 500 or so sheets, try the following. Make sure everything is clean, including all four charge rollers and the image density sensor assembly. As long as everything is within PM standards the settings in the following document should help prevent putting too much toner on the drum and at the same time transfer more of the toner to the ITB and paper.[ATTACH]48888[/ATTACH]

Thanks for the document.
So, this can be a problem even if everything on the printer is within spec?
One way to circumvent it could be to print SEF in such a case I guess?

I had a look at the PM counters, all PCDU unit except the black one have been replaced only 20K pages ago. One of them has a replacement counter of 5, dont know if it have in fact been replaced four times though.

[copier tech]

Re: Red line on print Ricoh MP C2051

There is one large drum, I suppose that is the "drum" we are talking about. Then there is one much smaller greyish axle/drum that rotates against the large one, and then there is one more thin cloth like axle under that again.
I removed the drum and put it carefully away letting it sit upright on one end. I carefully cleaned the small greyish one with the tip of a soft tissue in the affected area, that axle was covered with a solid thick layer of toner in that area. I then carefully picked on the cloth like axle with a small screw driver while I used a vacuum cleaner to suck excess toner out of it. I sucked with the vacuum cleaner close to the mylar strips too, without damaging them, and a few other places where there was excess toner. I put the drum back in place, I then rotaded the drum/axles of the assembly while I put pressure on the ends of the drum so all rotating parts was in contact like when they are when the full PCDU assembly are operating. I found that after a couple full revolutions of the drum all toner had been picked up by the other axles or the film behind the drum. Removed the drum again to check behind it, sucked a little and put it all back together.

The first few printouts had some very small residue in the problem area. I changed the paper orientation from LEF to SEF, printed a few more examples and found no more magenta residue on the prints. Changed back to LEF.

As others have said what you had done is a temporary fix.

The line is caused by a worn cleaning blade. vacuuming out the unit helps but once they start to fail nothing you can do about it except replace the unit.

[slimslob]

Re: Red line on print Ricoh MP C2051

There is one large drum, I suppose that is the "drum" we are talking about. Then there is one much smaller greyish axle/drum that rotates against the large one, and then there is one more thin cloth like axle under that again.
I removed the drum and put it carefully away letting it sit upright on one end. I carefully cleaned the small greyish one with the tip of a soft tissue in the affected area, that axle was covered with a thick layer of toner in that area. I then carefully picked on the cloth like axle with a small screw driver while I used a vacuum cleaner to suck excess toner out of it. I sucked with the vacuum cleaner close to the mylar strips too, without damaging them, and a few other places where there was excess toner. I put the drum back in place, I then rotaded the drum/axles of the assembly while I put pressure on the ends of the drum so all rotating parts was in contact like they are when the full PCDU assembly are operating. I found that after a couple full revolutions of the drum all toner had been picked up by the other axles or the film behind the drum. Removed the drum again to check behind it, sucked a little and put it all back together.

The first few printouts had some very small residue in the problem area. I changed the paper orientation from LEF to SEF, printed a few more examples and found no more magenta residue on the prints. Changed back to LEF.

The large one is the OPC drum. The smaller grayish one is the charge roller. The cloth-like roller is the charge cleaning and is very easy to damage. Changing to SEF will will put the colored bar at the lead (or trail) edge of the paper will prevent the build up of toner against the cleaning blade, the charge roller and the drum.

[SteinarN]

Re: Red line on print Ricoh MP C2051

Thanks again
I should've read me up on the working principles of this area of a laser printing machine.

[mga]

Re: Red line on print Ricoh MP C2051

I was so happy I had got my printer working fully that I printet out a manual, some 300 pages. But midway it gradually appeared a pink line across the printout.
See pdf.
What can the problem be?

Just replace magenta pcu cleaning will not work when the dcb has gone it's gone good luck

[anothertech]

Re: Red line on print Ricoh MP C2051

Thanks for the document.
So, this can be a problem even if everything on the printer is within spec?
One way to circumvent it could be to print SEF in such a case I guess?

I had a look at the PM counters, all PCDU unit except the black one have been replaced only 20K pages ago. One of them has a replacement counter of 5, dont know if it have in fact been replaced four times though.

To answer your question, yes, one way to circumvent this problem is to run it SEF so the heavy line is not always in the same place. This can sometimes get you by for quite some time until you eventually replace the PCU.

[fshead]

Re: Red line on print Ricoh MP C2051

I Gotta chime in on these as i sold a lot of them and outside of the crappy trays,and right door plastics found the drums to be solid.
You can mod the "hard" charge roller but dont touch the soft charge cleaning roller as the will fall apart.If you use a soft paint brush you can clean the drum blade and then use yellow toner to lubricate it by dusting the drum lightly and turning drum in the "correct" direction.I actually saved a lot of these drums in case i needed them but might have only 3-4 of these models in the field.