Xerox Phaser 8500, Service Manual

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4-26 Phaser 8400/8500/8550/8560 Color Printer Service Manual
General Troubleshooting
Paper is picked and moved through either the simplex paper path to
determine the paper trailing edge bounce interval 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.
Simplex Path
7 Exit Trailing Edge
Interval (us) Reports the interval from the
time the engine software is
commanded to start the duplex
pick process until the Exit
sensor deactivates.
Paper Sensor Bounce Times
R# Definition
Typical
Value
(8400) Typical
Value (8500/
8550/8560)
Actions
Common
0 Tray Reports the tray from which
the paper was picked.
1 Paper Size Reports picked media size.
Tray 4 Pick
2 Tray 4 Pick Bounce
Interval (us) Reports the interval during
which the Tray 4 Pick sensor
bounces following the passage
of the paper trailing edge.
Tray 3 Pick
3 Tray 3 Pick Bounce
Interval (us) Reports the interval during
which the Tray 3 pick sensor
bounces following the passage
of the paper trailing edge.
Tray 2 Pick
2 unused
3 unused
Tray 1 Pick
2 unused
3 unused
Common
4 Deskew Bounce
Interval (us) Reports the interval during
which the Deskew sensor
bounces following the passage
of the paper trailing edge.
Paper Trail Edge Times (Continued)
R# Definition
Typical
Value
(8400) Typical
Value (8500/
8550/8560)
Actions