Tektronix Phaser 840, Service Manual

Page: 58 / 207

Service Guide
47
22,511.02 Unexpected right-width sensor (A/A4 sensor) event
1. Media stops just inside
preheat entry rollers a. A4-width media in A-size
tray
a. Check media and
replace with good
media; verify tray-type
plug position
2. Media folded, damaged,
or deformed in tray a. Media gets out of the
tray but hits the sensors
at the wrong times
a. Remove media, inspect
and reload
22,512.14 Time-out on preheat exit sensor
1. Damage on the right
corner of A Size media a. Probable preheater
problem
a. Replace preheater
2. Tight wrinkles across
media a. Short-grained media
b. Too much drag in
preheater
a. Use long-grained or
heavier weight media
b. Replace preheater
3. Media found flat inside
preheater a. Too much drag in drive
train stalling media path
motor
a. Use PC-based
diagnostics 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.
4. Media found flat right at
deskew roller a. Feed clutch problem a. Replace feed clutch
22,514.05 Unexpected duplex sensor event
1. Media in both duplex
path and simplex path a. Media was pulled from
exit into duplex path
while printing
b. Short-grained media
c. Label stock curling
d. Extreme environment
a. Make sure exit tray is
not overfilled or messy;
empty tray
b. Use long grain media
c. Empty the exit tray often
d. Do not leave media out
of wrapper for extended
periods of time in
extreme environments
22,538.13 Time-out on preheat exit sensor (duplex) with media in the front door area
1. Skew a. Last sheet in tray
b. First sheet in tray
c. Failure of deskew
system
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
Error code
Additional clues Probable cause Action