Xerox Phaser 8400 Service Manual page 169

Check Menu Value Key Table (Continued)
Tray 1 Pick Shaft - Runs the media path drive train and engages the tray 1 pick solenoid on
the fly. The pick shaft goes through 2 full revolutions while drive requirements are determined.
Test ID# R Definition
#
Tray 1 Pick Shaft 0 Off average MP
fe. (mpts).
1 On response
time. (sec)
2 Initial average
MP fe. (mpts).
3 Transition MP fe
min. (mpts).
4-24
Results Interpretation/Actions
Reports the average MP fe
during the run in interval before
the pick shaft is engaged.
Reports the time between pick
solenoid activation and a
detectable response from the
MP drive system indicating that
pick shaft engagement. A higher
value of R1 could indicate that
the missing tooth gear engaged
more slowly than usual, which
could be a problem with the lift
plate spring tension, the
condition of the sliding surfaces
between the cams and the
followers, drag on the pick shaft,
or problems with the drive gears
(missing teeth, etc.).
Reports the average MP fe
immediately following the pick
shaft engagement.
A higher value of R2 could
indicate extra friction between
the cams and the lift plate
followers (wear, contamination,
etc), as well as high lift plate
spring tension or higher shaft
bearing drag. Also if the missing
tooth gear did not kick forward
and engage, this value would be
unchanged from R0.
Reports the minimum MP fe
value at the transition point
between breaking separator pad
contact and the continued
depression of the lift plate.
Value reflects the effort needed
to rotate the pick shaft and
compress the lift spring. A
higher value of R3 could show
higher cam/bearing friction and/
or lift plate spring strengh.
Phaser 8400 Printer Service Manual