Minolta CSPRO EP4000 Blank copies

[EricPogi]

Hi guys, I have Minolta CsPro EP 4000. Before it was working fine its just that after cleaning with a blower im getting blank copies with this machine, i dont know what went wrong.. I've already changed drum unit and corona from the other working machine but still i got the same problem. help me pls?

[Cantechman]

does the image form on the drum?

[EricPogi]

when i make a copy, no image formed on the drum.

[eg101]

Wow, haven't seen one of those lately but here goes.
No image on the drum likely means no charge, clean drum ground and H V connections on developer unit. Also, check that developer is turning.
Did you replace the whole charge corona unit or just change the wire? I've seen the corona end blocks short to ground.