Xerox Phaser 840 Service Manual page 144

Table 4-4 Check Menu Value Key
Paper Path Timing (Test ID# 17 and 4) - This test reports the timing from one sensor or event
to the next sensor in the paper path. The results are broken into two ID's: 17 includes pick
events from all trays up to the standard ick sensor, ID 4 coves the remaining paper path
sensors. In the case of the Preheat entry sensor to the A width sensor the locations are so
close that skewed paper may result in negative timings.
Test ID#
Paper Path Timing
ID# 17
4 - 128 Phaser 840/850/860/8200 Color Printer - Service Manual
R# Definition
0 Tray 3 pick motor
to tray 3 pick flag
1 Tray 3 feed motor
to tray 2 pick flag
2 Tray 2 pick flag to
tray 1 pick flag
3 Tray 3 feed motor
to tray 1 pick flag
4 Tray 2 pick motor
to tray 2 pick flag
5 Tray 2 feed motor
to tray 1 pick flag
6 Tray 1 pick clutch
to tray 1 pick flag
Results Interpretation/Actions
The paper is not being picked
> 850 reliably. Ensure that the paper is
not too heavy and the at the tray
is loaded properly.
Paper is not feeding smoothly
through the trays. Ispect the trays
for obstructions, trays are loaded
> 975
properly, the correct media
weight is used and the tray is
properly seated in the printer.
Paper is not feeding smoothly
through the trays. Inspect the
trays and pick up guide for
> 1000
obstructions. Are the trays loaded
with the supported media and
properly seated?
The paper is not being picked
reliably. Ensure that the paper is
> 850
not too heavy and the tray is
properly loaded.
The paper is not being picked
reliably. Ensure the paper is not
too heavy. The pick roller may be
> 800
contaminated with paper debris
and coatings from specialty
media, try cleaning the roller and
pick pad.