It is very hard to get to it and you will need the service manual. Your issue is the tray 2 pickup solenoid which controls the movement of the tray 2 pickup roller.
This is a common issue on older printers. The service manual glazes over how the various signals from the paper sensors are used (or for that matter, even where they are located), so I'm somewhat lost as to how to troubleshoot this further. With the covers off, I can see that the solenoid is engaging to let the feed roller turn to bring in the first page, but often remains engaged a bit too long, so a second sheet gets picked up *after* the first sheet is completely picked up.
The first page exits the printer normally, and then the printer stops (paper jam error) with an inch or so of the second sheet sticking out of the exit slot. It's almost like I'm printing a multiple-page job, even though it's only a single page (i.e., regular test page). However, when feeding from the main (bottom) tray, often (but not always), a second sheet will get fed into the printer AFTER the first sheet has been picked up and fed through (i.e., the end of the page has entered the printer). Pick-up from either tray seems to work fine, and always picks up a single sheet at a time. I've got an old and up until now very reliable LaserJet 2100.Īfter experiencing some paper pick-up problems, I replaced the feed rollers and separation pads for the MF tray and the main tray.
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