HP Laserjet 1012

I acquired 3 of these units and they have gotten light use [less than 3,000 pages each]. 1 unit "squeaks" when feeding paper but I thought I'd be able to swap parts if needed one day. Recently, one unit started to consistently jam with the paper about 1/4 inch into the fuser area. Not feeding multiple pages so I think the separator pad is fine. I say 1/4 inch because when the page is extracted, there is a slight crease about 1/4 inch across the top. Sometimes I can get 10 pages through OK, but after its warmed up, maybe only

1 or 2. I changed the cartridge. No joy. I thought I'd swap the fuser units but first I tried the "squeaky" printer. Prints fine but exactly the same jam. I have the service manual and can take these part easily. But the manual isn't giving me a good clue as to the issue. Could be a timing issue but there aren't many sensors and the manual says sensors rarely fail. Anyone with experience able to focus me on the cause of the jam? Thanks.
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John Keiser
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John Keiser Inscribed thus:

On some machines the rubber on the drive roller detaches and migrates to one end and then fouls the metalwork causing creases and jams.

Best Regards:
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Separator Pad[s]!

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John Keiser

They all squeak when printing. Plastic against plastic will eventually squeak. The toner is basically plastic and will imbed itself into the nylon gears. Cleaning and grease helps, for a while. You can find the source of the squeaks with a stethoscope or a vinyl hose stuck in one ear and the other end for sniffing around the gears.

Try asking in the forum area.

The paper feed assumes that both feed rollers are feeding equally and evenly. If one of them starts to slip, or is a slightly different diameter, the paper will enter the laser area slightly sideways and eventually jam. Clean or preferably replace feed rollers if feeding even slightly sideways.

That doesn't sound like the rollers. My next guess would be that fuser film in the fuser roller assembly is shredded and catching the edge of the page. This looks close:

I can't tell from your description what you thought of doing or what you actually did. If you swapped fuser assemblies, and the problem stayed with the printer, then it's not the fuser. this is not an easy project.

The HP LaserJet 1012 is a PITA to take apart and repair. I don't think it was made to be disassembled. I have two that are about to go to the recyclers (dead PCB sensors or both).

Sensors don't fail. Instead they get filled with toner, dirt, dust, and in my case, drywall dust. Lots of ways to kill a printer.

It helps to have the plastic side panels removed so you can watch the gears move. A broken tooth might cause the same problem.

Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
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Jeff Liebermann

Anything blue is meant to be replaced. The paper pickup rollers are the first suspect. I don't know that printer, but the release mechanism for most rollers is difficult if you havn't seen how to release them. Usually that roller wears asymetricly causing the paper to feed at a slight angle or the paper fails to pick-up.

SOMETIMES you can turn the paper upside down and the printer won't jam because the curl of the paper is different, but it usually means it won't last long.

Reply to
Ron D.




The most likely squeak causes are inside the (replaceable) toner cartridge; that squeak might follow the toner if you were to swap it into another printer.

Paper jam usually responds to cleaning and reseating, but it COULD be that a gear-driven roller has a stripped gear. Examine the paper path carefully and look for jam-causing staples, beads, pencil stubs and such, in the gearing area.

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