Xerox Phaser 8400 Service Manual page 191

Check Menu Value Key Table (Continued)
6 Turnaround
Power Blip Width
(watts)
Transfix Drive Fast, Transfix Drive Slow - With the drum turning at a constant velocity, the
transfix roller is loaded against the drum, held for one revolution, then raised. The velocity with
which the transfix roller is moved differs for the two tests.
Test ID# R Definition
#
Transfix Drive 0 Time to first
Fast, Transfix contact (sec)
Drive Slow
1 Loaded average
Y-axis following
error (mpts)
2 Loaded Y-axis
following error
ripple (mpts)
3 Time to last
contact (sec)
Drum Maintenance Drive - With the Y-axis rotating, the drum maintenance unit is loaded
against the drum for a short time in each configuration (roller and blade/blade only).
Test ID# R Definition
#
Drum 0 Time to blade
Maintenance first contact (sec)
Drive
1 Time to roller
first contact (sec)
4-46
Reports the width of the
momentary drop in the required
drive power when the printhead
motion is being reversed. An
abnormal value may indicate an
unusual amount of play in the
drive mechanism.
Results Interpretation/Actions
Reports the time from the load
command to the engine until the
drum indicates contact with the
pressure roller.
Reports the average Y-axis
following error during the Roll
With Transfix Roller Down
interval.
Reports the difference between
the max and min Y-axis
following errors during the Roll
With Transfix Roller Down
interval
Reports the time from the
unload command to the engine
until the drum indicates no
further contact.
Results Interpretation/Actions
Reports the time from the load
command to the engine until the
drum indicates blade contact.
Reports the time from the load
command to the engine until the
drum indicates roller contact.
Phaser 8400 Printer Service Manual