Lexmark CS720 Service Manual page 203

Motor (tray 1 pick) lifting error service check
Action
Step 1
Reset the printer.
Does the problem remain?
Step 2
Make sure that the tray insert is properly seated or fully inserted.
Does the problem remain?
Step 3
a
Enter the Diagnostics menu, and then navigate to:
Printer diagnostics & adjustments > Sensor tests
b
Find the sensor (Pick roller index (tray 1)).
Does the sensor status change while toggling the sensor?
Step 4
Check the cable that connects the sensor (tray 1 pick roller index)
to the controller board.
Are both ends of the cable properly seated?
Step 5
Reseat the cable.
Does the problem remain?
Step 6
Check the sensor cable for damage.
Is the cable free of damage?
Step 7
Replace the sensor. See
on page 386.
Does the problem remain?
Step 8
Check the cable that connects the motor (tray 1 pick) to the
controller board.
Are both ends of the cable properly seated?
Step 9
Reseat the cable.
Does the problem remain?
"Sensor (550-sheet tray index) removal"
Diagnostic information
Yes
Go to step 2.
Go to step 3.
Go to step 8.
Go to step 6.
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 10.
Go to step 10.
203
5028
No
The problem is
solved.
The problem is
solved.
Go to step 4.
Go to step 5.
The problem is
solved.
Go to step 12.
The problem is
solved.
Go to step 9.
The problem is
solved.