CS-1620 Dark Band on Backside of copy.

[Big Al]

:confused: On the first copy, there is about a 2 inch dark band at the lead edge on the REVERSE side. I have replaced the transfer roller and drum unit. What am I missing

[mascara]

:confused: On the first copy, there is about a 2 inch dark band at the lead edge on the REVERSE side. I have replaced the transfer roller and drum unit. What am I missing
BAd toner. 2 years ago i have many machines with your problem.
1) Change toner to original..
2) Clean with vacuum cleaner developer unit
3) Do U130 with original toner
Sorry for my english..