Copystar m2551 Image shift help

[vsluggo]

I have a customer who when making copies thru the feeder and copying from top tray number 1 has
a shadow edge line down the edge of the page (1 MM from rear edge) Tray two is fine. the scanner glass is not the problem!!
This is the same as a registration line usually at the bottom only its on the rear edge of copied page only ( and so minute its not very serious

Can someone tell me what code I need to input in to perform a image shift on tray one?
This model is new to us. see picture attached

[Kyo fan]

That picture is just a thumbnail. Post another one if you can where it's clearly visible.

[20gaugeO/U]

U034