When I try to line
Have/had the same problem: Getting "paper size mismatch" on the C4280 status
screen, after we got a paper jam. Every time we hit OK and put in paper,
Message about "Now printing Alignment page", it feeds through quickly, with
nothing printed on the page and reverts back to Paper size mismatch. Finally
got rid of the error, not sure how, but now when I try to copy anything, we only
get the lower right postion of the document that I'm trying to copy. Printing
from the PC seems ok.
Powered off and back on, and it is back to P"now
printing alignment page, quick feed through and "paper size mismatch" error.
When copying directly from the glass panel,it will only print a quarter of
the page -however it prints and coorectly if we print directly from the
The problem is the paper size sensors. Remove the plastic access panel that
is for access to the rollers in the back and has 4 rollers on it. There are two
papaer sensors attached to the printer circuit board (PCB). The control arm for
the sensor is a small plastic piece that extends slightly into the paper path
above the PCB. The plastic can be broken when you are removing a paper jam. I
stuck a small piece of a match stick in the sensor to keep it open (as though a
wider piece of paper was passing throught the printer). I can't switch to
smaller card stock, etc, but who cares, it works.
The copying problem is caused because the C4280 will not scan correctly until
after it does the alignment phase.
on Jul 25, 2011