Lexmark CS720 Service Manual page 131

Action
Step 3
Check the paper path for partially fed or jammed paper.
Is the paper path free of partially fed or jammed paper?
Step 4
Remove the partially fed or jammed paper.
Does the problem remain?
Step 5
a
Enter the Diagnostics menu, and then navigate to:
Additional input tray diagnostics > Sensor tests
b
Find the sensor (Trailing edge (tray [x])).
Does the sensor status change while toggling the sensor?
Step 6
Reseat the sensor cable, and then check the sensor for
misalignment and damage.
Is the sensor properly installed and free of damage?
Step 7
Reinstall or replace the sensor. See
trailing edge) removal" on page
Does the problem remain?
Step 8
a
Enter the Diagnostics menu, and then navigate to:
Additional input tray diagnostics > Sensor tests
b
Find the sensor (Pass-through (tray [x])).
Does the sensor status change while toggling the sensor?
Step 9
Reseat the sensor cable, and then check the sensor for
misalignment and damage.
Is the sensor properly installed and free of damage?
Step 10
Reinstall or replace the sensor. See
through) removal" on page
Does the problem remain?
"Sensor (550-sheet tray
380.
"Sensor (550-sheet tray pass-
379.
Diagnostic information
131
Yes No
Go to step 5. Go to step 4.
Go to step 5. The problem is
solved.
Go to step 8. Go to step 6.
Go to step 8. Go to step 7.
Go to step 8. The problem is
solved.
Go to step 11. Go to step 9.
Go to step 11. Go to step 10.
Go to step 11. The problem is
solved.
5028