Color Drum Sensor Error; Black Drum Sensor Error; Cassette Error - Lexmark C920 Service Manual

934 - Color Drum Sensor Error

934 Service
Drum Sensor
Step Questions/actions
1 Clean the color drum sensor LED.
Did this fix the problem?
2 Swap the yellow photo developer with a different color
photo developer. Did this fix the problem?
3
Is connector CN2 on the printer controller board
connected properly?
4 Did replacing the sub frame fix the problem?

935 - Black Drum Sensor Error

Step Questions/actions
1 Clean the black drum sensor LED.
Did this fix the problem?
2 Swap the black photo developer with a different color
photo developer. Did this fix the problem?
3 Is connector CN2 on the printer controller board
connected properly?
4 Did replacing the sub frame fix the problem?

936 - 939 Cassette Error

936 Service
Paper Option
Step Questions/actions
1 Are connectors CN8 and CN6 on the printer controller
board connected properly?
Yes No
Problem solved. Go to step 2
Replace the Go to step 3.
photo developer
that called the
error.
Replace the sub Plug the
frame assembly. connector in
securely.
Problem solved. Replace the
printer controller
board.
Yes No
Problem solved. Go to step 2
Replace the Go to step 3.
photo developer
that called the
error.
Replace the sub Plug the
frame assembly. connector in
securely.
Problem solved. Replace the
printer controller
board.
Yes No
Replace the Plug the
printer controller connector in
board. securely.
Diagnostic information
5056-XXX
2-15