Greetings! Just FYI.
We had one C4050i today with many C2153(Transfer belt spacing fault at K pressure switching) and few C2155(Transfer belt contact fault after K pressure established).
Machine was rebooting to clear the error and eventually stuck with it after few prints. After removing ITB and carefully inspecting ITB and vicinity inside of machine especially rear left upper inside area where is switch with pushing arm we put all back and machine start to work normally. Attached is diagram of switch and arm.
It's switch not photointerrupter like in A3 models.
c3350i sw4.jpg
We had one C4050i today with many C2153(Transfer belt spacing fault at K pressure switching) and few C2155(Transfer belt contact fault after K pressure established).
Machine was rebooting to clear the error and eventually stuck with it after few prints. After removing ITB and carefully inspecting ITB and vicinity inside of machine especially rear left upper inside area where is switch with pushing arm we put all back and machine start to work normally. Attached is diagram of switch and arm.
It's switch not photointerrupter like in A3 models.
c3350i sw4.jpg