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My Phaser 6250 started printing the first page ok, but then the 2nd page comes out early and overlapping the first page. It appears that the printer is picking up the first page and then picks up the 2nd page and tries to continue printing on it as if it is a longer sheet of paper. The 3rd page jams inside the printer either in tray two (partially taken up) or behind door A. The only time this doesn't happen is if page 2 jams instead of page 3. I can never print more than 1 page without having to clear the jams in tray 2 and door A (sometimes there isn't actually paper anywhere in the system).
I cleaned the registration assembly and sensor and also applied the patch from this post https://fixyourownprinter.com/posts/37997 but the problem didn't change.
When I print from trays 3 and 4, I have the same problem.
Sometimes when printing from tray 2, the tray is ejected. When printing from tray 3 or 4, the tray is usually ejected.
I believe that the paper pickup problem is sensor-related because it happens from all trays but I'm not sure what to check after the registration assembly.
I'm unsure if the tray ejection is related to the printing problem.