asked Oct 9, 2009 at 10:22am
Hp HP DeskJet Plus

13 Paper Jam in HP laserjet 4 plus after warmup.

Hi, I took this printer from my brother's house because he really never used it and we needed to replace our old one here at the office because it was folding the paper and what not when it prints. Anyway, the replacement printer has a different problem. From the bottom tray, I get an occasional 13 paper jam error right after the printer warms up and the paper hasn't even been picked up to get printed. I open and close the rear cover and top cover and then the paper prints fine afterwards.

I also noticed that whenever I open the rear cover it displays the paper jam error message. I checkd the bottom tray and the roller on the left side and everything appears ok. I even switched the tray with the one from the old hp laserjet and it still has the same problem. I also removed the fuser and checked it and it looked ok to me. I checked the rollers and tested them manually and they seemed fine. When it does print it prints perfectly fine, and the problem is sporadic. Anyone here know what the problem is?
It is normal to get a paper jam message when you open the rear door. I'd suspect the pickup roller is worn and not working all the time. You can try swapping it with your other printer. Wiping it with a damp cloth helps a bit.
by moe on Oct 13, 2009 at 12:32pm Add comment
The pickup roller is fine. I get the same problem when I feed the paper through the bypass in front. I send a print job, the printer warms up and right after the warmup I get the 13 paper jam error. All I do is open and close the front top cover and that resolves it. It's annoying having to do that occasionally when i'm printing from the other room.

I also hear some squeaking noise during warmup. I don't know if that is part of the problem.

P.S. I also did what you asked and swapped the bottom tray with the other printer and still the same problem. Any help is appreciated. - gjozefi
Not the tray but the pickup roller. If the roller turns on the manual feeder when you send the job but the paper does not move then the roller has an issue. It is possible for both rollers to be bad as this is a very old printer.
by dmzcompute on Oct 13, 2009 at 6:18pm Add comment
So your saying the rollers in both the bottom and front feed might be the issue? But isnt the bottom roller located on the tray itself? And where would the pickup roller for the front feed be located? - gjozefi
Over on the left side. You have to remove the black plastic front cover to access it. There's a pinch latch at the top.
by moe on Oct 14, 2009 at 2:30pm Add comment
I really don't think the rollers are bad. This printer was never used and the one that we replaced this with was used everyday and we never had a problem with the rollers. I'm thinking its a sensor problem.

I can't find the pinch latch your speaking of. There is something there that latches the front cover when you close it. If that's what your talking about, what do I do to get it open?
by gjozefi on Oct 14, 2009 at 3:09pm Add comment
You lower the MF tray by pushing in on the top. You are looking at the front opening. It is covered by a black plastic piece. At the top center of the black piece is a latch. You put your thumb and forefinger on either side of it and squeeze (pinch) and pull. The black plastic panel will come off and expose the innards, which include the roller on the left side.
by moe on Oct 14, 2009 at 3:13pm Add comment
I see where youre talking about but you can't squeeze it or anything. Its the piece that pushes in that keeps the feeder door closed when you close it.

I tried pressing with my thumb and forefinger but it doesnt move and the black cover seems to be blocked by this piece to prevent it from opening. I guess I'm missing something. Maybe it's different on the 4+ version of the printer? - gjozefi
OK, I thought I was being clear. Why on earth you are trying to pull the door latch off is beyond me. I clearly said to pinch the latches on the black plastic cover. Those sit behind that door latch.
by moe on Oct 15, 2009 at 10:56am Add comment
Ok.......I did that. I squeezed the sides behind the door latch and it doesnt do anything, its sill being blocked by the door latch. I even checked in the manual and the diagram shows what your describing but the difference is that the door latch is not shown in the picture. - gjozefi