leading edge not constant from lu202 on c 5501

[primozks]

I just got lu202 installed on c5501, but when I print 10 copies, the leading edge is not constant. It differs for up to 2mm. This is not happening from any other tray or bypass tray.
Any suggestions?

[primozks]

Just a thought...
Is there any setting in service menu like "initial speed setting for tray4"?
I'd like to know, if it's possible when the roller takes the paper from tray to registration sensor, the paper overshoots the registration sensor... and in this case leading edge differs.