Lexmark C910 - Cpu Error

2-28 Service Manual
5055-01X
992 - Temperature/Humidity Sensor Error
993 CPU Error
Replace the printer controller board.
2 Test the sensor.
While actuating the
sensor, does the
voltage fluctuate
between 0 V and +5
between pins 2 and
3 of connector CN7
of the printer
controller board?
Replace the printer
controller board.
Replace the upper
and lower
transparency
sensor.
Step
Questions /
Actions
Yes No
1 Is connector CN3 on
the printer controller
board connected
properly?
Go to step 2. Plug the connector
in securely.
2 Replace the
temperature and
humidity sensor (a
component of the
paper feed solenoid
assembly). Did this
fix the problem?
Problem solved. Replace the
printer controller
board.
Step
Questions /
Actions
Yes No