Xerox Phaser 840 Service Manual page 83

Table 2-6 22,000 Fault Codes and Actions
Error code
Additional clues
4. Excess skew
5. Media deformed or
damaged in media tray
6. Media perfectly straight
7. Media goes back down
simplex path
22,700.02 Command-stop event while transfixing. Typically becuase of a positioning error at the
start of drum maintenance or imaging.
1. More than one sheet of
media in the path
2. Media perfect in media path
(exit door area)
Probable cause
a. Last sheet in tray
b. First sheet in tray
c. Failure of deskew system
d. Exit roller is out of position
a. Left corner folded in tray
(simplex trailing edge)
a. Media path motor stall
b. Bad gear in drive train
c. Duplex sensor not snapped
into front panel assembly
d. Bad duplex sensor
a. Roller slip
b. Media impeded from exiting
by top cover
c. Media impeded from exiting
by a tall stack of paper
a. Multiple pick
a. Check for drum rotation
b. Y-axis encoder defective, or
not seated properly
c. Drum maintenance clutch
d. PostScript fault
e. Front panel error
f. Power supply problem
Error Codes and Messages
Action
a. Refill tray(s)
b. Make sure tray(s) is
loaded properly and
media is square in tray
c. Check deskew fingers. If
chronic check preheat
entry assembly for
deformation
d. Reseat exit roller
b. Remove media, inspect
and reload
a. Use diags to run "verify
drive current
requirements" from the
paper path group to
check for stall, or feel for
unevenness in motor
rotation by manually
turning. Replace paper-
path motor if needed.
Check electronics if
needed
b. Replace stripped gears
c. Reassemble front panel
d. Replace front cover
display assembly
a. Replace exit roller, insure
exit idler rollers are
providing adequate force
b. Reassemble top cover
c. Remove media from
output tray
a. Verify that the lower tray
is properly loaded.
b. Try heavier media
c.
a. Try again
a. Check for Y-axis motion
blockage
b. Reseat or replace
encoder
c. Replace the drum
maintenance clutch
d. Try again, cycle power, or
NVRAM reset
e. Replace front panel
assembly
f. Replace power supply
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