Paper Jam on Duplex printing MFP-M477FDN

miguelin_74 · ‎08-05-2019

I have 3 MFP-M477FND, 1 works, and 2 have the same problem, I can easily print single-sided pages. But if I want to print double-sided, the paper jam message appears. The sheet picks it up and just when it starts to come out of the fuser, just when the lid is lifted to remove the sheet, the paper jam message appears. When you open the back, there is no wrinkle on the paper. It comes out perfect. Always, it is just when the fuser cover is lifted and the paper appears, it shows approx 1mm and stops. The sheet is almost all printed, except for the part that has not yet been collected and of course, the second side is unprinted because it does not get to remove the sheet to pick it up again and print the second side. I have tried with 2 new Fusers, which on another printer print without two-sided problems, I have changed the Transfer Belt of another printer that is going well, I have changed the reverse driver assembly of another printer that prints well. I have also changed the Registration assembly, from another printer that prints well. And I change the Secondary Transfer Roller Assembly, also I have change the Motor near the fuser, and I have updated Drivers, Firmware and it always does the same. The truth is that I don't know what else to look at. I would appreciate a help. Thank you.

Repairatrooper · ‎08-05-2019

Have you tried a duplex engine test? Open and close the front door five time quickly and the machine will do a base level duplex print test. This will eliminate possible software problems. I would check the duplex tray and feed assembly as well to ensure that nothing is slowing down the paper.

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Shahzadg · ‎08-05-2019

It looks the duplex unit sensor is abnormal replace it or the duplex motor. If problem remain replace formatter. Hope this will help you

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miguelin_74 · ‎08-05-2019

Hello Repairatrooper, thanks for your reply.

I tried what you say, open the front door 4 times, make a test page that it's ok, print 6 horizontal lines. When I tried opening the front door 5 times, for duplex print, the paper stops just exiting from the fuser.

Here is a video.

All time that I make a duplex printing, the paper stops at the same location.

miguelin_74 · ‎08-05-2019

Hi, thanks for reply.

I have replaced the fuser motor and the formatter (CF378-60002)

No luck, the problem continue..

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