Creasing Issue T642 w/duplexer

[mstarks67]

New to this forum...so greetings to all.

I have a T642 with the duplex option installed. When printing simplex, the output is perfect. When I print duplex, the paper will randomly crease. I have checked everything to include the plastic ribs in front of the fuser as well as the fuser itself, cleaned the printer innards completely, changed the pick-up rollers, replaced the duplexer assembly and replaced the entire back assembly. I am now at a complete loss as to the cause of this creasing. I am hoping that somebody in this community will have some insight to help me resolve this irritating problem.

Thanks in advance,

Mike

[cs_steve]

I would experiment with paper types, see if it is only happening on a certain type of paper --> if it isn't the paper's fault, I would change the fuser. (The fuser is where the most pressure is applied to the paper and so it is the most common place for creasing to occur).