DC12 fade on edge (pic attached) need help, pls

[JimmyB]

the skew is about 1 mm. the lead edge in left side is 5mm and in right side is 4 mm.

Hi JimmyB, I've also got a fade much like yours and I'm curious to know how you played with Lead / Side Registration and ROS DELETION NVM? I've cleaned the Erase Lamp surface but that didn't do anything

GusG, try to set side reg NVM to factory setting, which is 7406. the quickes way is, with keypad NVM 720-007= 7406 for tray 5.

actualy, my problem is not solved in full. Now DC12 print fine, but cant do manual duplex from tray 5, because i cant align tray. When change side reg NVM for tray 5 to 7350, fade come on.
check ROS, serch in Eureca for "Faint Lines or Deletions in Process Direction", try solution and tell me for result.

[GusG]

GusG, try to set side reg NVM to factory setting, which is 7406. the quickes way is, with keypad NVM 720-007= 7406 for tray 5.

Thanks JimmyB. I checked 720-007 and it's already at 7406. When mine does print from tray 5 (which isn't always) it actually comes out very well registration wise but only when I send SEF, when I send LEF it is always skewed. This is actually the case with all the trays.
When my tech gets his PWS running again we'll have a look at your other suggestion.