Waves: Trailing Edge (A4 and larger)
Waves appear on the trailing edge of the paper perpendicular to the feed direction.

Cause:
If fusing is performed too quickly for paper delivery, the resulting slack at the trailing edge of the paper may produce ripples in the sheet.
Solution:
In the [Machine: Maintenance] group on the [Operator Adjust.] menu, execute 0512: [Fuser Unit Speed Adjustment].