one Canon IRC 3330I machine, the BLACK only printouts is OK, but color printouts are blurry, the Gradation Adjustment printout shows the black is not registered at the same level with color’s registration, (see below picture)
color_mismatch.jpg
I have tried to change the Black Drum unit and ITB unit, but nothing improved.

I have tried to change the Black Drum unit and ITB unit, but nothing improved.
I've tried maintenance function, color mismatch auto correction, but always got error message at the end, "auto correction is cancelled, please try again, if problem persist, please contact service representative."


Much appreciate for your help!