Mp9000 dirty paper edge

[Codex]

Hello

I have a problem with some Mp9000... Every time i change developer, the machine for 50k copies or so make pri ts/copies with dirty paper edge.... I tried to clean out everything, the pcu unit.. Development unit... Cleaning unit and so on... But nothing... After about 100-200 copies the Problem is back again.

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[Zeldaman]

Re: Mp9000 dirty paper edge

Hi there!
Had this on 2 older machines, the mylar on the pcu-seal pn: B1402413 was a little (difficult to see!) deformed. Changed it with the brush - OK.Hope this will help.
Merry Christmas and a happy new year.
Greetings...

[mbolduc]

Re: Mp9000 dirty paper edge

Had something similar years ago. 3 techs and a trainer missed it. it was intermittent spots near lead edge. There is a tin foil type material on a vertical plate just before the fuser that is grounded to the machine. It collects loose toner and over time the toner builds up really thick. I needed 3 yellow rags to get it all the first time I had an issue with it. Hope this helps. (nice place to clean on a regular basis once you have seen it...)

Good Luck

[Codex]

Re: Mp9000 dirty paper edge

Thanks! I'll try it on my next visit... This is what i see under the drum frame.

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[slimslob]

Re: Mp9000 dirty paper edge

Had something similar years ago. 3 techs and a trainer missed it. it was intermittent spots near lead edge. There is a tin foil type material on a vertical plate just before the fuser that is grounded to the machine. It collects loose toner and over time the toner builds up really thick. I needed 3 yellow rags to get it all the first time I had an issue with it. Hope this helps. (nice place to clean on a regular basis once you have seen it...)

Good Luck

Thanks! I'll try it on my next visit... This is what i see under the drum frame.

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That's the usual cause that I have encountered. Also the bottom of the frame with the heat shield between the fusing unit and the PCU. Clean both every maintenance cycle and you will prevent problems. The firat time you clean the frame bottom will take some time as the toner will be caked on.

[Codex]

Re: Mp9000 dirty paper edge

You mean if the shield is not cleaned the toner sticks under the drum frame?

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[slimslob]

Re: Mp9000 dirty paper edge

You mean if the shield is not cleaned the toner sticks under the drum frame?

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No. Toner scattering will build up on both. Paper does rub against the bottom of the PCU frame as it is considered a guild plate. The machine frame between the PCU and fusing unit will rub the paper when the build up gets thick enough.

[Codex]

Re: Mp9000 dirty paper edge

Ok.. But my Problem is the tober dust under the drum frame... The machine has a new developer.. Only 20k...and if i clean up everything the Problem is back after a day

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[Bunce]

Re: Mp9000 dirty paper edge

Has the Dev unit got new filters on it? If they are not 100% clean, air pressure can build up in the Dev unit and puff toner out, seems to be worse after a Dev change. Failing that try replacing the Dev unit for a new one, I've had this problem with high mileage Dev units, as the mag roller gets covered in toner turning from silver to black! Toner then doesn't stick very well to the dev on the mag roller, and deposits itself everywhere. I have scrubbed the mag roller with a green kitchen scourer before now! Worth a try if you haven't already tried these things.

[slimslob]

Re: Mp9000 dirty paper edge

Has the Dev unit got new filters on it? If they are not 100% clean, air pressure can build up in the Dev unit and puff toner out, seems to be worse after a Dev change. Failing that try replacing the Dev unit for a new one, I've had this problem with high mileage Dev units, as the mag roller gets covered in toner turning from silver to black! Toner then doesn't stick very well to the dev on the mag roller, and deposits itself everywhere. I have scrubbed the mag roller with a green kitchen scourer before now! Worth a try if you haven't already tried these things.

MP 9000 is a Production model and does not have filters on the development unit. It has a suction system that draws the toner haze out of the development unit. Parts for that system may need to be replaced. This includes the tube from the development unit to the suction pump as it can become clogged. Also considering the age of this model, if the development seals have not been replaced recently, do them now.

[Codex]

Re: Mp9000 dirty paper edge

Thank you guys! Its a very bad problem.. Had the same with a Pro906.. The strange thing is that in the 906 the problem disapears after a week...

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[mbolduc]

Re: Mp9000 dirty paper edge

Did you scrub the developer mag roller? Is it dirty? What is the meter on the machine?

[Cipher]

Re: Mp9000 dirty paper edge

Had something similar years ago. 3 techs and a trainer missed it. it was intermittent spots near lead edge. There is a tin foil type material on a vertical plate just before the fuser that is grounded to the machine. It collects loose toner and over time the toner builds up really thick. I needed 3 yellow rags to get it all the first time I had an issue with it. Hope this helps. (nice place to clean on a regular basis once you have seen it...)

Good Luck

Yup often over looked, as you said it does get really caked in that entrance area under the long filter.

It's also worth cleaning all the filters regularly and increasing the fan speed and on time, good air circulation helps.

[Counsel]

Re: Mp9000 dirty paper edge

i would recommend what slimslob mentioned. That suction motor for the toner dust is replaced at so many hours when the meter goes a lot guys like to just reset the hour meter and leave the pump alone it really does get weak though. Best thing you can try is pull the right side covers off remove the pcu and dev unit take the hoses off the pump going up to the dev unit and suck it out with a vacum, make sure the hose from the pump to the suction bottle on the bottom is clear, make sure the bottle itself looks good this has a screen on the side to relieve pressure build up and is a pm item but hardly ever gets replaced. Check your history if you dont see a suction bottle or suction pump being replace in a long time might be a good idea to get new ones. Also clean the hose going from the toner hopper into the dev unit and clean out the plastc piece the hose connects to on the dev unit and clean your mag rollers.

Then i would replace the filter to your left of the drum that slides in, and the filter that drops in behind the LCD panel arm. Take note make sure you reconnect every hose and double check them if you leave one unattached you will have toner dust everwhere within 24 hours.

[slimslob]

Re: Mp9000 dirty paper edge

i would recommend what slimslob mentioned. That suction motor for the toner dust is replaced at so many hours when the meter goes a lot guys like to just reset the hour meter and leave the pump alone it really does get weak though. Best thing you can try is pull the right side covers off remove the pcu and dev unit take the hoses off the pump going up to the dev unit and suck it out with a vacum, make sure the hose from the pump to the suction bottle on the bottom is clear, make sure the bottle itself looks good this has a screen on the side to relieve pressure build up and is a pm item but hardly ever gets replaced. Check your history if you dont see a suction bottle or suction pump being replace in a long time might be a good idea to get new ones. Also clean the hose going from the toner hopper into the dev unit and clean out the plastc piece the hose connects to on the dev unit and clean your mag rollers.

Then i would replace the filter to your left of the drum that slides in, and the filter that drops in behind the LCD panel arm. Take note make sure you reconnect every hose and double check them if you leave one unattached you will have toner dust everwhere within 24 hours.

PM cycle says to replace the pump at 2.5M and the bottle at 3M. I replace both at around 2.5M. No reason to make 2 trips since most of my Pros are 45 minutes or more away.

I do not know if it applies to the B234/D101 series models, but on the D059, if you clear the fusing unit cleaning unit PM counter, it also clears both the pump and the bottle. I therefore clear the individual parts for the cleaning unit.

I have also had new bottles with small cracks near where the tube from the pump connects. Hot glue works to seal them.