Lexmark C77x Service Manual page 80

5061
Step Actions and questions
4 See if the paper is trying to feed from the tray.
Note: You can observe the autocompensator feed rolls
and the paper through the tray access door.
Run the Tray x feed test from the Diagnostics menu to
help diagnose a feed problem. See
page
Is the media leaving the tray?
5 Are both of the autocompensator pick rolls installed
and turning?
6 Check the autocompensator pick rolls for wear or
contamination.
Are the autocompensator pick rolls worn or
contaminated?
7
Check the pass thru sensor for correct operation by
running the Tray x sensor test from the Diagnostics
Menu. See
Does the pass thru sensor operate correctly?
8 Make sure the pass thru sensor is correctly connected
to the Tray x system board.
Is the sensor cable connected correctly?
9
Check the autocompensator cable for correct
installation to Tray x system board.
Is the cable connected correctly?
2-38
Service Manual
3-20.
"Sensor Test" on page
Yes
Go to step 8
"Feed Test" on
Go to step 6
Replace the pick
arm rolls.
Replace both
rolls at the same
time.
Check for any
obstructions that
3-20. might catch the
media and create
a paper jam.
Replace the
FRUs in the
following order:
1. Pass thru
2. Electronics/
Replace the
option or replace
the following
parts in the order
until the error is
cleared:
• Autocompen-
• Tray x system
No
Go to step 5
Go to step 9
Go to step 7
Go to step 8
Install the cable
correctly.
sensor
assembly.
size sensing
assembly
with system
board.
Install the cable
correctly.
sator pick
assembly.
See "Auto-
compensa-
tor pick
assembly
removal" on
page 4-27.
board.