I will Try
Thanks for everbody,
I will replace the drum unit.
The black drum unit with a durability is very small, around 3,000 copies. Someone achieves a better result?
I have another issues, anybody can help me?
01. When I calibrating the C-1, what is better? Use a kodak grayscale to auto-adjust, or perform a complete adjust (visual cal)?
In the complete adjust (visual cal) I don't know how do the "limits and 30% match" sheet.
02. When you print using only the black, even with new drum unit, the color 100% black leaves with many spots and is not plateau.
03. I'm using the EFI Postscript Driver v 2.1, but the dot printed is greater than using PCL 6.0 driver. But, in PCL, when I send a print, I need send only 1 copy, but if I send 10 copies, the filesize is 10 times higher.
thanks again.
dn_gustavo