Ricoh 1013f back side of copy dirty

[Rick]

I have a couple of units giving me dirty copies on the back side lead edge about 1 inch is there any adjustments Im missing ?

[iMind]

I have a couple of units giving me dirty copies on the back side lead edge about 1 inch is there any adjustments Im missing ?

The only thing that comes to mind is PCU over the limite, this causes the transfer roller to get dirty, nothing more to add.

[oldtech]

I have a 3350 doing the same thing, after a couple drum and dev changes without results, I noticed the charge bias was more positive than default, changed it to default and problem went away. Don't know yet if its a permanent fix yet tho.

[TonerMunkeh]

Check the transfer roller bushings as well, they can split and lead to copy quality issues like this.