mpc2500 dog earring

[bcoulson]

I have issues with a few mpc2500 machines dog earing left hand front corner of a4 page, this is after replacing the fusing unit, bridging unit, and sr790 (not that sr790 is causing it), but due to dog earring the entrance to finisher catching dog ear and causing jam.

fusing unit was whole unit, brand new, can dog ear from all trays, not every copy approx 1 in 20 pages dog earring and folding back, is after the fusing hot roller and pressure roller as dog earing is not folded back and pressed, curled dog earring.

installed tray heaters for moisture in paper trays, increased fuser idle. clean and inspected gates and paper guides.

anymore advice would be helpful.

we have about 5 of these doing so not one machine issue.

[Oze]

so the paper is jamming in the bridge unit/finisher entrance?
I have seen machines that have been dragged around the office with the finisher still attatched cause similar issues.
It's usually the finisher guide plate being bent out of shape.
Also if the machine is on carpet they may want to consider placing it on a board to stop the finisher sinking into the carpet and causing a hight difference at the finisher entry point.

[beowolfe]

Are the additional paper guides installed with the bridge unit? There is two small ones on the outside and a larger one in the middle. Without these the paper dog ears and jams in the stapler.

[nmfaxman]

Are the dog ears flat?
If flat it is before the fuser.
If sticking up it is after.

[jonezy999]

Does the machine have the blue bridge unit mounts installed?

[bcoulson]

dog ears are not flat so after the fusing unit rollers, the paper is being dog earred after fuser and before bridging unit, even removing bridging unit and finisher paper still dog ears.

finisher entrance guide ok, thats why i swapped the sr790 across as the original unit was bent and twisted and had enough of reshaping finisher entrance guides.

i will check the bridging unit for the extra paper guides (blue ones) as i did not place new bridging unit on.

[zed255]

1+ for the blue guides.

[brodera]

have you checked the interchangeunit? sometimes the guides on it have smal white plastic that unsticks from the guides casuing this to dog ear the paper.

[jonw]

Are you using genuine toner ? have had a lot of problems with Katun stuff melting and sticking to fuser claws

[Smee]

Im pretty sure the blue guides for the finisher dont go into the MPC2500....only for the MPC4000, and 5000. Ive had the same problem twice and both times I replaced the fuser. I know youve already done this with a brand new unit, but I would try another one anyway. If that dosnt work try another paper exit assy.

About the fuser...im convinced that these machines and parts are all built with slightly different tolerances - like a micron out but thats enough to screw up the paper feed path, so a fuser that works fine in one machine dosnt work in another. Ive seen it too many times - the 4000 and 5000 fuser does the same thing.

[Mark Bbb]

Re: mpc2500 dog earring

Hello,
I'm a little bit late here, but i'm having exact the same problem now with two mpc2500.
Is there a solution already?
Many thanks in advance!
Greetings, Mark

[impetus73]

Re: mpc2500 dog earring

It might be the exit unit module between the bridge, and the fuser. I have had a few, where rollers were clogged with toner, and some where heat from the fuser really bended and twisted the guides inside there.

You have to take it out, to see both errors, can't see it from the "outside".

[Mark Bbb]

Re: mpc2500 dog earring

Dear Impetus,
thank you for your quick answer!
I have double checked and cleaned the interchange unit, won't help...
I have looked for bended guides, can't see any...
Although i believe you, the guides of the exit unit are going to be replaced.
I let you know the result (might take a week or so)
Greetings,
Mark

[pattyboy7]

Re: mpc2500 dog earring

Narrow down your possibilities. Did you run the machine without the bridge installed? It's super easy to take out.

Is it only doing it while duplexing? Rule that out.

Does it change if you change the orientation of the paper? SEF vs. LEF?

[Mark Bbb]

Re: mpc2500 dog earring

Pattyboy,
When it happens, the curl is formed with the first run of a duplex task.
There is no bridge unit installed
Curl is formed after the fusing rollers and before B238 4930 the Reverse receiving Tray (outside machine).
So... ???
(Thank you for your input...)
Greetings,
Mark