For the past week or so, the print on my CP1525nw has been gradually degrading. The print has been fading on all cartridges, yet the status shows almost 70% full. There are dark streaks running down the left portion of the page, and I noticed corresponding streaks on the cartridge drums on the black and yellow cartridges. I removed all the cartridges and noticed excess toner in the same general location on the ITB in a continuous band. I've tried calibrating, run a cleaning page and even performed the belt cleaning function on the 2nd service menu to no avail. I don't have extra cartridges to swap to see if it's a cartridge problem (why would it affect all cartridges at roughly the same time?) or ITB problem.
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