Lexmark C752 Service Manual page 136

5060-2XX
The printer detects paper low in tray x when adequate paper is installed in the tray.
Step Action and questions
1 Run Tray x sensor test from the Diagnostics Menu.
Does the test pass for sensor L2?
2 Check the cable connection for the paper low/out
sensor to tray x system board.
Is the cable correctly installed?
3 Check the paper level sensing assembly for correct
installation. Check the following for damaged or broken
parts:
• Check the paper level sensing flag bellcrank.
• Check the paper level sensor is seated correctly.
• Check the paper level sensing flag.
• Check the paper level sensing flag spring.
Is the paper level sensing assembly installed correctly?
4 Is the paper level sensing assembly damaged or
broken?
The printer detects paper out in tray x when adequate paper is installed in the tray.
Step Action and questions
1 Run Tray x Sensor Test from the Diagnostics Menu.
Does the test pass for Sensor L1?
2 Check the cable connection for the paper level sensing
assembly to tray x system board.
Is the cable correctly installed?
3 Check the paper level sensing assembly for correct
installation.
Is the paper level sensing assembly installed correctly?
4 Check continuity of the paper level sensing assembly
cable.
Do you measure continuity?
5 Check the paper level sensing assembly for correct
installation. Check the following for damaged or broken
parts:
• Paper level sensing flag bellcrank
• Paper level sensing flag
• Paper level sensing flag spring
Is the paper level sensing assembly installed correctly?
2-102
Service Manual
Yes No
Go to step 3 Go to step 2
Go to step 3 Install the cable
correctly
Go to step 4 Install the paper
level sensing
assembly
correctly
Replace the
paper level
sensing
assembly
Yes No
Go to step 5 Go to step 2
Go to step 3 Install the cable
correctly
Go to step 4 Reinstall the
assembly if not
installed correctly
Go to step 5 Replace the
cable
Replace the Go to step 6
paper level
sensing
assembly