NEC Super Script 4400 Maintenance Manual page 234

12. Banding - Banding line appears in the horizontal direction.
Main Causes
1. This is a transfer failure due to the shock caused when photoconductor belt's seam passes over the
cleaning blade.
Countermeasures
1. Replace the belt module with a new cartridge. (See Chapter 6)
OPC Belt Cartridge
Belt Seam
Cleaning Belt
Imaging Artifacts 225