Hello:
I have 2 identical HP4100 printers and am using pre-printed forms.
Recently, one of these printers began to change the alignment beginning half way down the page: the top half of the page is exactly lined up but in the lower half the print varies vertically from where it should be, anywhere from 0.5mm to 6.0mm. Its like a roller begins to slip half way down the page. (I am accustomed to dot-matrix printers which is why I refer to this issue as a line feed adjustment.)
No jam/misfeed errors are being logged.
The feed and pickup rollers have been changed (2x RF5-1885 & 4x RB1-8957).
I have switched printers and jet-directs: It happens only on this particular printer, affecting 70% of the pages.
There are no print quality issues or fuser streaks.
Any ideas? Could this be a separation clutch/main motor or some other component?
Thanks for any and all suggestions.
-Seepink-
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