NEC Super Script 4400 Maintenance Manual page 227

5. Wrinkle/Image Migration - Banding shadows of different optical density appear due to the wrinkle, image
migration and color misregistration occurring on the print paper.
Main Causes
1. Print paper other than the recommended paper is used.
2. Paper discharger unit of transfer unit is not functioning.
3. Fuser oil of fuser unit is nearly out.
4. One side of fuser unit was lifted when installed.
Paper Discharger Unit
Transfer Roller
Transfer Drum
Paper Feeding Roller
Countermeasures
1. Use a recommended paper.
2. Confirm that the transfer unit is properly installed in the paper discharger unit and functioning
normally.
3. Clean the paper discharger unit, or replace it with a new unit. (See Chapter 7)
4. Replace the fusing unit with a new one. (See Chapter 6)
218 SuperScript 4400 — Maintenance Guide
Fusing Unit
Transfer Unit