Copies and prints are clean but blacks and colors are way too dark, so we did a full cleaning and ran Full Gradiation adjust and the copies were fine again. Fast forward 2 months 4 days later and the darker prints and copies returned again. Full Gradiation adjust resolved issue but not sure why the dark prints return after being stable for 2 months. Not sure what to replace to solve this issue. Any ideas what parts might cause this? Drums and all other parts are well within their life still. Nothing overdue for replacement.
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