Xerox Phaser 8500, Service Manual

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4-22 Phaser 8400/8500/8550/8560 Color Printer Service Manual
General Troubleshooting
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.
Paper is picked and moved through either simplex or duplex paper path to
determine leading edge arrival time at each paper path sensor. R values have
alternate definitions or are unused depending on the pick tray and if simplex
or duplex path was selected.
7 Plate lifted average
fe. 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.
Paper Drive Power
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550/8560)
Actions
0 Tray Reports the tray picked from.
1 Paper Size Reports the media size picked.
2 Unused
3 Unused
4 Tray 2 Pick Average
Power (watts) Reports average power over
the pick interval (begin pick to
Deskew Sensor).
Paper Lead Edge Times
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550/8560) Actions
Common
0 Tray Reports the tray from which
the test paper was picked
1 Paper Size Reports the size of the picked
paper.
Tray 2, Tray 3, and Tray 4 Pick Shaft (Continued)
R# Definition
Typical
Value
(8400) Typical
Value
(8500/
8550/8560)
Actions