HP Laserjet Duplex print Paper Jam error

[SergioAgostinho]

This has been a wonderful printer, but without any change on its setting, computer or software settings, a PAPER JAM error comes up every time I use duplex printing. (1- Tried also with laptop windows10 print. Same result. 2- Duplex copy. Same result).

It works fine on single side printing.

I noticed that error appears after one side prints and when it should pull paper back to print the other side, it doesn´t. Rollers are not inverting the rotation way after first side print.

Firmware is the latest. Software also.

Please help.

[Repairatrooper]

There was a known issue with the fusers on some of these units and this would prevent duplex printing. I would contact Tech Support and see if there are any current Service Advisories that cover your unit based on serial number.

[SergioAgostinho]

Thanks for your reply. I did find some info online about jamming in duplex printing but only when it pulls paper back it would jam in the fuser. Mine it’s not pulling the paper back to print second side. So its not jamming in the fuser

[SergioAgostinho]

Any ideas arround here? Please help!

[SergioAgostinho · Accepted solution]

I have just found the issue and fixed it!

To those that might have the same problem. If it´s not pulling paper back to print the second page, check the duplex unit on rear cover of the printer. Unscrew 3 bolts that holds it to the printer (no need to disconnect wires) and removel black plastic cover that covers the sensor lever (2 bolts). Check if the lever is running on the other plastic connection or if its loose. Mine was loose. Put it back on and it´s working 100%.