C652, the whole page black after drum and blade replacement

[rajabi1367]

I have changed the drum and the blade for Black Unit recently and after that the whole page is printed in black, no margins (exactly the whole page), it doesn't matter which color test page or demo page is printed.
I tested another Drum Unit (Black) and there was no problem so the Developing Unit is ok.

So is there a problem with drum or blade or something else?


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[alabovic]

Re: C652, the whole page black after drum and blade replacement

Check the charging corona.