The paper is always jam when i copy in duiplex unit. {back to back]
SOURCE: HP LaserJet 4700DN Duplexer Jams
hmmm..check the paper for riffling(with fingers before placing in tray)..and the rollers can get slippery, after a period of time...
check your computer warranty for FREE here
SOURCE: DUPLEX PAPER JAM
I posted previously. After buying new paper, the duplex printing is working. It is probably heavier than my previous paper, but not particularly thick (don't know the exact grade.) So if you have this problem, try buying some new paper a little thicker than you are using now.
SOURCE: paper jam on hpc7280 printer noise from duplexer area NO PAPER JAM
Follow the instructions in this video. If you follow those instructions and still get the message, you may need to replace your printer or the rear door.
SOURCE: Ricoh Aficio 2022 jams duplexing only
You can't get that unit as one whole part, you would have to order each part separately. Also, if the paper is warped or curling, replacing that interchange unit won't change anything.
Try fanning the paper and flipping it over, or use a new **** of paper and see if that makes a difference.
SOURCE: Canon IR1018 forces duplexing
Go to service mode MENU and #, clear all and ok,
after that machine goes to factory sett., reenter your sett. it should work
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