Lexmark C750 Service Manual page 112

5060-00x
Step Action and questions
5 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?
6 Are the autocompensator pick arm rolls turning?
7 Check the autocompensator pick arm rolls for wear or
contamination.
Are the autocompensator pick arm rolls worn or
contaminated?
8 Check paper tray wear strips for wear or contamination.
Are the wear strips worn or contaminated?
9 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?
10 Make sure the pass thru sensor is correctly connected
to the Tray x system board.
Is the sensor cable connected correctly?
11 Check the autocompensator cable for correct
installation to Tray x system board.
Is the cable connected correctly?
12 Check the base door assembly, paper guide, wall
support plate and door spring for damaged parts,
warped parts or obstructions that might cause the
paper to jam over the pass thru sensor.
Did you find any problems with these parts?
2-78
Service Manual
3-24.
"Sensor Test" on page
Yes
Go to step 9
"Feed Test" on
Go to step 7
Replace the Pick
Arm Rolls. See
"Pick rolls" on
page
Replace both rolls
at the same time.
Replace the wear
strips
Check for any
obstructions that
3-24. might catch the
media and create a
paper jam
Replace the FRUs
in the
following order:
1. Pass thru
sensor
assembly
2. Electronics/size
sensing
assembly.
Go to step 12
Repair or replace
parts as necessary
No
Go to step 6
Go to step 11
Go to step 8
4-48.
Go to step 9
Go to step 10
Install the cable
correctly
Install the cable
correctly
Replace the auto-
compensator
assembly. See
"Autocompensa-
tor pick assembly
removal" on
page 4-17.