C451 Black large areas in copies

[Guest]

I've this black large areas randomly in my copies
I have this problem in about every 4-5 sheets
I've replaced IU Black, no help

p.s. i've no problem with test page, it's fine

[Avskrap]

Re: C451 Black large areas in copies

Does this happen from the RADF aswell as the platen glass? If so, check/replace the CCD. If only from the platen glass, check and clean the optics. Try reseating the ribbon cable that goes from the CCD to the MFP PWB.