Ricoh MPC2000 full coverage image defect

[cdog530]

Hopefully someone has seen this before....my initial thoughts was a transfer roller problem...replaced it...still there.

Here is what I have done so far: swapped out image transfer belt and transfer roller

It does it on all colors...it does it on test pattern prints...I have done a memory clear....I am still leaning toward a paper transfer roller voltage issue....I have also cracked open the laser unit just to make sure there wasn't any hazing or marks on the polygon mirrors or lenses throughout the assy.

I appreciate the help.

Thanks
C


burney problems.pdf

[TonerMunkeh]

Re: Ricoh MPC2000 full coverage image defect

That looks as if it might be coming from the fuser, are subsequent copies dirty? Try changing the oil supply roller and cleaning roller.

Also, don't expect the MPC2000 to do full colour prints reliably. They just don't have the fuser to tackle it.

[JustManuals]

Re: Ricoh MPC2000 full coverage image defect

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[cdog530]

Re: Ricoh MPC2000 full coverage image defect

I can see where you think it might be the fuser from my attachment. Its all properly fused and I get no repeat image. Fuser entrance guides are clean as is the fuser belt. Thanks manual guy I already have the manual though and its not helping..hehe.
-C

[Iowatech]

Re: Ricoh MPC2000 full coverage image defect

Kind of looks like the fusing unit pressure roller is done or maybe the hot roller bearings are out of position. If this was a black and white machine, I'd say it is likely that you have the wrong toner in the machine as well.
I mean. something has to be preventing the toner from being properly fused. (That picture you had in the first post was a sky shot after all, right?)

[jonezy999]

Re: Ricoh MPC2000 full coverage image defect

What steps did you take after the memory all clear? From my experience memory all clear doesn't tend to fix many things, especially print quality defects. You may need to input all non-default Sp's before you can fault find any further.

[neergish]

Re: Ricoh MPC2000 full coverage image defect

Have you tried removing the laser shutter assbly?

[Elmo]

Re: Ricoh MPC2000 full coverage image defect

All the times ive seen this fault its been the fuser

[cdog530]

Re: Ricoh MPC2000 full coverage image defect

I have attached a few more examples of what it looks like in color...I have removed the laser shutter....I could see where a messed up pressure roller could cause uneven fusing but it troubles me that the defect is consistently starting on the same spot on every page...the oil supply roller is clean and I am getting absolutely no fuser ghosting or improper fusing like running thick paper in normal paper fusing mode....I cleared the memory and ran a couple just to see if we still had the defect, it was still there so I just re-loaded the nvram with what it had.

Thanks
C



more examples.pdf

[Elmo]

Re: Ricoh MPC2000 full coverage image defect

If you run a thicker paper through do you still have the same fault ?

[redneckstylin]

Re: Ricoh MPC2000 full coverage image defect

how bout transfer roller on side door?

[cdog530]

Re: Ricoh MPC2000 full coverage image defect

how bout transfer roller on side door?

That was my initial thought...didn't make a difference...haven't tried thick paper...customer never runs it so didn't even think to.

[andy227]

Re: Ricoh MPC2000 full coverage image defect

I don't know the mpc2000, but I'm assuming its the same range as the mpc2500 etc. This not a memory thing or some such, thats barking up the wrong tree. Its a 'physical' problem. The fault is identical on all colours, transfer belt or fuser. You swopped out the trans belt, go with the fuser. Check the fusing belt carefully, is it rippled ? Check the plastic bushes on the hot roller carefully, these machines chew them up in no time for whatever reason. If they are chewed/ melted away, and they are not always obvious, the fusing belt will run not taunt, will run 'rippled' and may cause that. Strip the fuser and check those, I've changed them so many times, I don't know what gives with them.

[cdog530]

Re: Ricoh MPC2000 full coverage image defect [SOLVED]

I appreciate all the replies and help....It was the pressure roller. The fuser belt looked good along with all the bushings and bearings. The pressure roller had some lines and small wrinkling on it. This is the first time I have ran into issues with the C2500 series machines pressure roller....I usually reuse them a couple times when rebuilding a unit...I guess I am just so use to torn, scratched, etc fuser belts that I overlooked the pressure roller. I attached a picture of the pressure roller.

Thanks
C

IMG_20130724_152455_108.jpg

[andy227]

Re: Ricoh MPC2000 full coverage image defect

Glad you found it cdog. We were almost there, rippled fusing belt, rippled pressure roller. Even though looking at that small ripple in the pressure roller I would not have thought it enough to cause that fault. Good luck.