My 840DP (22000 printouts) have begun to jam prints when printing doublesided. Often it happens after 30-40 pages. It prints first page of the sheet Ok, but the sheet got stuck in the upper exit when sheet has pulled back 2/3 length.
I remove the sheet, it jams again, after 3-4 jams it mostly continus printing OK until job is done. So the problem is rather erratic. No error messages.
Background:
Prior to this, I had a paper jam, leading to a small piece of paper getting stuck inside the printer. After 4 hours the printer finally spitted the piece out. Worked fine thereafter.
Almost at the same time the pins in the bottom of the maintenance drawer (sides) were so worn out that there were notches in them, leading to smeared and printouts. I attached stripes around the pins (tip from a phaser service technician), which solved the problem.
Any clues?
I remove the sheet, it jams again, after 3-4 jams it mostly continus printing OK until job is done. So the problem is rather erratic. No error messages.
Background:
Prior to this, I had a paper jam, leading to a small piece of paper getting stuck inside the printer. After 4 hours the printer finally spitted the piece out. Worked fine thereafter.
Almost at the same time the pins in the bottom of the maintenance drawer (sides) were so worn out that there were notches in them, leading to smeared and printouts. I attached stripes around the pins (tip from a phaser service technician), which solved the problem.
Any clues?