asked Jun 10, 2008 at 8:40pm
Hp HP LaserJet 4SI

Another HP Laserjet 4Si Paperjam Thread

My secondhand Laserjet 4Si jams when printing jobs of more than one page. I notice it has two pages moving through it at one time, which is evidently for the sake of doubling the job speed. The first page that goes through becomes jammed in the rollers at the end, while the second becomes trapped when trying to pass through the now occupied rollers.

My suspicion is it may be a sensor issue moreso than dirty rollers. Any thoughts on this? Nonetheless, I plan to acquire some Rubber Roller Rejuvenator and see if it clears up, and then there are a number of other options mentioned elsewhere on this site. In the meantime, is there a setting that can tell the printer to wait until a page has reached the out tray before taking another? At least then I wouldn't have to print things one page at a time.

I wouldn't try rubber roller rejuvenator, it won't do you a bit of good. Is the second page in registration? In other words, does the image shift downwards on the second page? If so, check the Printer Repair Kits section. There's a fix for the problem there.
by moe on Jun 10, 2008 at 10:02pm Add comment
Now that you mention it, that does seem to be the case. The second page is shifted down about an inch or so. I'll grab the Registration Shift Repair Kit. Thanks. Though I'd still like to know if there's a workaround I can use besides printing single pages until it gets here.

While I'm here, there's one other problem. The paper jams when being fed through to the top output tray. The front of the page gets to the top rollers, but doesn't feed through, or does so only partially after a moment, while it still continues to be forced from inside. This happens even with a single page job.
by Jimage on Jun 10, 2008 at 10:24pm Add comment
The other problem you are describing (...jams when being fed through to the top output tray), sounds like a Job Offset assembly issue. Do a search on that item.
Good luck!
by Anonymous on Jun 11, 2008 at 5:41am Add comment
That would be worn out delivery rollers. Those are a bit difficult to replace, requiring removal of the top assembly. Then you have to disassemble quite a bit of it to get the delivery assembly out so you can replace the rollers. We don't have any video instructions for it, but we might have the rollers in stock.
by moe on Jun 11, 2008 at 8:07am Add comment
Sounds like an adventure. Where might I find the delivery rollers if they're in stock? I don't see them listed anywhere on this site.
by Jimage on Jun 11, 2008 at 10:48pm Add comment