Lexmark C910 - Black Drum Sensor Error; Cassette Error

Diagnostic Information 2-15
5055-01X
935 - Black Drum Sensor Error
936 - 939 Cassette Error
3 Did replacing the
color drum sensor fix
the problem?
Problem solved. Replace the
printer controller
board.
Step
Questions /
Actions
Yes No
1 Is connector CN27
connected properly?
Go to step 2. Plug the connector
in securely.
2 Clean the black
drum sensor LED.
Did this fix the
problem?
Problem solved. Replace the black
drum sensor.
Go to step 3.
3 Did replacing the
black drum sensor
fix the problem?
Problem solved. Replace the printer
controller board.
936 Service
Paper Option
Step
Questions /
Actions
Yes No
1 Are connectors
CN35 and CN36
on the printer
controller board
connected
properly?
Replace the printer
controller board.
Plug the connector in
securely.
Step
Questions /
Actions
Yes No