We have an HP Laserjet 4000 in our office that has started giving paperjam messages every so often. Ive replaced all the rollers, but it still does it. Ive checked the paperpath and nothing is stuck or anything. So, theres no paper going through the system. It just doesnt pick up the paper and reports it as paperjam.
Today it printer over 200 test pages before it jammed, but after it did it once it happens again fairly quickly.
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Pick your specific model from this link:
http://h20141.www2.hp.com/
View product diagram for Paper Pickup Drive Assembly. This shows the pickup assembly and how it breaks down. See if you can find anything that doesn't look right (I know, vague, look for chipped gears, etc).
Also look at the 500 Sheet Feeder parts list. You may need to replace the pickup drive assembly.
Since it won't pickup the paper to begin with, this is where you problem most likely lies.
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by: michkoPosted on 2007-11-21 at 09:03:08ID: 20329149
Make sure you've checked and cleared out all the possible areas. One little piece in the right spot, and you've got another paper jam. Here is a link from HP on clearing out paper jams:
http://h20000.www2.hp.com/
If the first page printed causes a 13.5 paper jam error, this support document from hp may help:
http://h20000.www2.hp.com/
Are you sure you replaced all the rollers? In the tray and in the pickup drive assembly? It really sounds as if the pickup drive assembly roller is still not picking up properly.