asked Mar 14, 2007 at 11:20am
Hp HP LaserJet 4SI

HP Laserjet 4si

Failure code is internal jam. (13.1?)
Paper makes it through the fuser where the paper is routed around the backside of the printer, but before it gets to the exit tray on top.
Investigation appears to be worn gears at the bottom left side of the back of the printer.
Gear 'slips' off and alongside of the drive gear resulting in not driving roller properly to route paper to exit (amateur diagnosis).

Jam occurs as paper is roughly 2/3 of the way through the fuser...

What gear or gear set do I need to replace to fix this? Can I purchase just a replacement gear, or do I need to replace the roller assembly.

Any help appreciated.
A 13.1 normally indicates a paper pick-up problem from the paper tray. Can you tell us if you are printing a single sheet or multiple sheets?


by unknown on Mar 14, 2007 at 11:44am Add comment
Doesn't ever get past the first sheet whether I print single or multiple sheets...same error. Paper gets 2/3 way through the fuser and printer stops.

Dave - Anonymous
Your problem is the job offset assembly. It needs to be replaced but is not an easy job.
by dmzcompute on Mar 15, 2007 at 4:23am Add comment
I agree with dmzcompute. Would you try setting the output bin to the 'rear' in the setup menu on the control panel (it then will output the paper to the drop down bin at the rear of the printer and thus avoid the job offset), that way it would prove the thoughts we have.
(or otherwise).


by unknown on Mar 15, 2007 at 12:50pm Add comment
Just for information on that printer if you change the output from the facedown to the rear faceup bin when you make the change in the menu and save it you have to turn the printer off and then back on for it to take effect.
by dmzcompute on Mar 15, 2007 at 1:26pm Add comment
Thanks for that dmzcompute, when you do something automatically, it's so easy to forget to pass it on to the customer.


by unknown on Mar 15, 2007 at 2:52pm Add comment
that seems to work okay. just extended the useable life of this printer a bit further... Thanks all...
by unknown on Mar 16, 2007 at 8:02am Add comment