Toshiba E Studio 600 huge problem

[copyalbania]

Hello friends,

I have a problem with a Toshiba e studio 600 that after i switch on and after 100 copies it begun to cover the page with a grey layer ( the copy it is made ).
I have changes this parts : original drum, cleaning blade and developer.
Also i have changed the charging belt unit, i have cleaned all the copier in every part but the same problem appears.
Than i thought the main board it is faulty and i have exchanged with a main board of a Toshiba 720, it does not cover the page with a grey layer but it stretches the image.

Does the two boards fit or is any procedure to get a good image?

PLEASE HELP!

[JustManuals]

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[michaelc]

Try cleaning the charger and replacing the grid. Also replace you ozone filters. Set the dev back up and do 05-290 then give it a go