Lexmark 11A4006 - Optra K 1220 B/W Laser Printer Service Manual page 58

"Remove Paper Standard Bin" message never appears:
FRU
1 • Standard
Bin Full
Sensor
• Sensor
Cable
• Engine
Board
"Remove Paper Standard Bin" message always appears when
attempting printing:
FRU
1 • Standard
Bin Full
Sensor
• Sensor
Cable
• Engine
Board
2-28
Action
Check the flag for damage or improper operation. If
incorrect, replace the sensor.
Disconnect the sensor cable from the engine board
and check the cable for continuity.
Check the voltage on the engine board at CNSF-1
It should be +5 V dc. If it is incorrect, replace the
engine board. If it is correct, replace the sensor.
Action
Check the flag for damage or improper operation. If
incorrect, replace the sensor.
Disconnect the sensor cable from the sensor and
print a test page. If the "Remove Paper Standard
Bin" message does not appear and the test page
prints successfully, replace the sensor.
Disconnect the sensor cable from the engine
board. Attempt another test page. If successful,
replace the sensor cable.
If you still have a problem, replace the engine
board.engine board and check the cable for conti-
nuity.
Check the voltage on the engine board at CNSF-1
It should be +5 V dc. If it is incorrect, replace the
engine board. If it is correct, replace the sensor.