Hi, I have a brand new DF629 installed on a brand new C258, the copies on the glass are fine and square but through the ADF the copies are moving up the page by about 3-4mm and leave a dark shadow line at the bottom of the image. It is not skewing, how do i adjust the front to back scan image on the ADF, is it through the service mode (can't see it)? or is it a manual adjustment? Many thanks

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