Black streak on 7665 sample attached

[Lonnie]

Black streak on 7665, we have replaced black drum, cortron and fuser.
Any suggestion on correcting this problem. It does this on print or copy jobs.
Sample of print out attached.

 

[PricelineNegotiator]

Is this cyclical? As in appearing multiple times on the same page at the same frequency. Could be the developer unit, but I'm not familiar with the 7665. I don't think it's the toner blade, as that would lay extra toner down.

 

[tiger_scout]

Assuming its landscape and not portrait like in your sample it may be a dirty ros window, black developer housing or black 1st btr roller.

 

[adriansto]

Black streak on 7665, we have replaced black drum, cortron and fuser.
Any suggestion on correcting this problem. It does this on print or copy jobs.
Sample of print out attached.

Black developer assy. You need service manual to know how to remove developer housing.