Re: laserjet 4700dn duplex paper path jam

Hello,

The previous posts are great suggestions.

Did you replace your Transfer Kit (ETB) just prior to getting the duplex jams?  The backside ETB feed roller assy (assy with 2-screws holding the little white rollers) may not be seated correctly.  You can remove the 2-screws and reseat the assy making sure the rollers are in contact with the black feed rollers on the back of the ETB.

Was there something else that was done to the printer just prior to the duplex jams occurring maybe inducing the issue? 

Here are some other posts that describe some common paper jam causes for the CLJ4700, CM4730 that you could review for knowledge:

http://h30499.www3.hp.com/t5/Printers-LaserJet-Experts-Online/Laserjet-4700-Paper-Jam-in-top-cover-area/m-p/5994383#M209639

http://h30499.www3.hp.com/t5/Printers-LaserJet-Experts-Online/HP-CLJ4700-13-10-Duplex-Jams/m-p/5934169

I hope this helps,

Regards,

DaveK.

I work for HP