When printing black and white prints are ok but when printing in any color red lines appear on print. I am (almost) sure that is a drum problem . Machine made about 5,5 k prints . I checked visualy magenta drum (and all the others) it looks good but i beleave is the drum. Those red lines are classical for fatigued drum. On this machine have i to replace only magenta drum or all color drums?
Can it be something else?