Lexmark C920 - Density Sensor Error

2-26 Service Manual
5056-XXX
994 - Density Sensor Error
Step Questions/actions Yes No
1 Is the front door fully closed? Go to step 2. Close the front
door.
2
Is the density sensor actuator stuck in place? Release the
density sensor
actuator.
Go to step 3.
3
Are connectors CN406 and CN407 on the sensor
board connected properly?
Go to step 4. Plug the
connector in
securely.
4
Is connector CN15 on the printer controller board
connected properly?
Replace the
density sensor.
Go to step 5.
Plug the
connector in
securely.
5
Did replacing the density sensor fix the problem? Problem solved. Replace the
printer controller
board.