Transfix System - Xerox Phaser 8400 Service Manual

Transfix System

The Transfix Roller applies pressure to the back side of the paper as it moves between
the Transfix Roller and drum. This pressure transfers the image from the drum to the
paper. A set of springs determines how much pressure the Transfix Roller applies in
the load module against the drum. The pressure must be uniform across the length of
the Transfix Roller to avoid paper wrinkles and light spots on the prints.
After the Transfix Roller is engaged, the drum rotates to advance the paper during the
transfix process. The drum continues to advance the paper until the Transfix Roller is
disengaged. The Transfix Roller is lifted and lowered by the action of the Process
Drive. All gears move to rotate the transfix camshaft to bring the Transfix Roller into
contact with the drum. The gears reverse to rotate the Transfix Roller back to its
original position, except when printing from Tray 1 or on envelopes. The transfix load
springs and double lever arms increase the force when the camshaft is engaged.
Warning
Never attempt to adjust or increase the transfix pressure on the springs.
Transfix load arm
Transfix load
module
Transfix
load
spring
Cam
2-18
Transfer roller
Drum
Phaser 8400 Printer Service Manual
s8400-119