Xerox 700 User Manual page 199

Problem Solving
Preventing Fuser Damage
To avoid 11" lines and wear marks, you may
require the use of two Fusers – one when
running 8.5x11" stock, and the other when
running 12x18" or larger stock. This is
especially true for the Graphic Arts people.
Image quality defects such as marks or spots
will occur every 110mm on the prints if the
Fuser roll is damaged. Defects which occur
every 98mm indicate a damaged Fuser belt.
Xerox 700 Digital Color Press User Guide 8-49