Xerox Phaser 8400 Service Manual page 165

Tray 2, Tray 3, and Tray 4 Pick Shaft (Continued)
Test is the same for each pick shaft although for tray 2 the media path motor is used and for the
525-sheet feeders the corresponding pick/transport motor is used. Test determines if the shaft
can be driven by the clutch, if the nudger rollers are being driven, and the pick pad/nudger roller
friction.
R# Definition
6 Time to lift plate up
(sec).
7 Plate lifted average
fe.
Paper Drive Power
Test picks paper from selected tray (test currently supports picking from Tray 2 only) and moves it
through either the simplex or duplex paper path to determine paper path power requirements.
R# Definition
0 Tray
1 Paper Size
2 Unused
3 Unused
4 Tray 2 Pick Average
Power (watts)
General Troubleshooting
Typical Typical
Value Value
(8400) (8500/
8550)
Typical Typical
Value Value
(8400) (8500/
8550)
Actions
Reports the time between the
activation of the Tray 2 lift motor
and the detection of the raised lift
plate. Out of range values may
indicate a problem with the lifting
mechanism (which could effect
the following friction
measurement), or media left in
the tray.
Reports the peak effort required
to drive the pick shaft when the
nudger roller is in contact with
the separator pad.
A smaller value could indicate a
slipping clutch, missing nudger
assembly pressure spring, or
glazed/dirty roller/pad.
Actions
Reports the tray from which the
test paper was picked.
Reports the size of the picked
paper.
Reports average of the power
over the pick interval (begin pick
to Deskew sensor).
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