Question about HP LaserJet 4050 Printer

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Keeps "jambing" - won't fully pick up the paper and move forward

It "picks up" the paper but does not feed the paper and then I get a paper jamb error message - although there is no paper in there.

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I work on these on a daily basis, the standard tray you are using is "Tray 2", which is the drawer tray on the bottom of the printer. If you open the front flap of the printer you will see a place where you can rest paper, This is known as "Tray 1". Remove Tray 2 and Try printing from Tray 1, (you may have to go through your menu items and make Tray 1 your default tray) If the printer is printing fine from tray 1 then the problem is one of two things.

1. Your rollers are worn
-you'll see one in the middle of the drawer tray when you pull it out
-the other one is located in the tray housing, remove tray 2 from the printer and slide your hand along the roof of the tray housing, you will be able to see/feel another roller.
Replacing both these rollers does the job 90% of the time.

2. The other thing that causes this problem is that the lifting mechanism in tray 2 is broken. This is usually not the case, and it is recommended that you replace the rollers before trying another repair.

Rollers should feel spongy and rough, they become hard and smooth the more they get wore down, until they are no longer able to catch and pull paper.

Posted on Jan 26, 2009

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Pull the paper cassette completely.

swap the gray roller in the cassette with the one up inside the printer

pinch blue tab to remove and make sure rollers snap in

Posted on Jan 26, 2009

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Most likely the rollers that pick up the paper need to be replaced. If you open the drawer that you are using there will be a roller in the tray itself and inside the machine where the tray just was there will be another on the "roof" of the tray hole. The easiest thing to do is to remove clean and switch their positions. This can get you up and running but you will probably want to replace them soon.
Part number RF5-1885-000CN
Hope this helps.

Posted on Jan 26, 2009

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