C, M, Y, K Imaging Drum Unit Failure
1.
Reseat the indicated Image Drum Unit
2.
Cycle the printer's power.
3.
If the problem persists follow the procedure below.
1.
C, M, Y, K Imaging Drum Unit
2.
C, M, Y, K Unit Motor
3.
Imaging Drum Unit Sensor Board
4.
Imaging Drum Unit Up/Down Mechanism
4.
Engine Control Board
Steps
Action Taken
Yes
No
1
Check the following for evidence of
fault or damage:
Imaging Unit
Imaging Unit Drive Gears
Imaging Unit Sensor Board
Imaging Unit Lift Up/Down Mechanism
Is there any damage?
Replace any damaged
parts.
Go to Step 2.
2
Test the Drum Phase Sensor.
Run the Scan Switch test
for the
indicated Imaging Unit.
Does the sensor function correctly?
Go to Step 5
Go to Step 3.
3
Use the Scan switch Test
to check
the Imaging Unit Phase signal:
C-Drum Phase Sensor
M-Drum Phase Sensor
Y-Drum Phase Sensor
K-Drum Phase Sensor
Does the Drum Phase signal change
when the sensor is blocked?
Go to Step 4.
Replace the Imaging
Unit Sensor Board
4
Check the harness continuity.
Disconnect the Harness from the
Imaging Unit Sensor Board and from
the Engine Control Board.
Is the harness conductive?
Replace the Engine
Control Board
Replace the harness.
Error Codes that Apply
Initial Troubleshooting Actions to Take
Parts of the Printer that Apply
Troubleshooting Procedure
340
Yellow Image Drum Unit Failure
342
Cyan Image Drum Unit Failure
341
Magenta Image Drum Unit Failure
343
Black Image Drum Unit Failure