Action Yes No
Step 2
a Remove the rear cover.
b Make sure that the sensor (3000-sheet tray set) is properly installed.
c Make sure that the sensor is free of debris or dust.
d Reseat the cable on the sensor and the cable CN5 on the controller
board.
e Check the sensor for damage.
Is it free of damage?
Go to step 3. Go to step 4.
Step 3
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > 3000‑Sheet Tray Sensor Tests > Tray set
Does the sensor status change while toggling the sensor?
Go to step 5. Go to step 4.
Step 4
Replace the sensor. See
“Sensor (3000-sheet tray set) removal” on
page 516.
Does the problem remain?
Go to step 5. The problem is solved.
Step 5
a Reseat the cable on the rest of the sensors.
b Reseat the cable CN5 on the controller board.
c If necessary, reseat all the junction connectors on the cables.
d Make sure that the cables do not block the path of moving parts.
e Check the cables for damage, and replace if necessary.
Does the problem remain?
Go to step 6. The problem is solved.
Step 6
a Reseat the cable on all of the motors and on the top door switch.
b Reseat the cables CN3 and CN4 on the controller board.
c If necessary, reseat all the junction connectors on the cables.
d Make sure that the cables do not block the path of moving parts.
e Check the cables for damage, and replace if necessary.
Does the problem remain?
Contact the next level
of support.
The problem is solved.
7421
Diagnostic information
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