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2
Dark background density
� Has the image drum been exposed to external light? �
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Yes
Mount the image drum in the printer and wait for about 30 minutes.
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No �
Is the heat roller of the fusing unit dirty? Yes Clean the heat roller.
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�
No
Is the contact of the cleaning roller of the image drum cartridge contacted with a contact assembly properly? (See Figure 6-5 C .) No Adjust the contact of the cleaning roller to contact the contact assembly properly. Replace the image drum cartridge.
�
w � w
Yes
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Has the trouble been removed? � YES END
Note:
After replacing the image drum cartridge, set the printer in the user maintenance mode by turning the power on while pressing the MENU key, and reset the drum counter. (Refer to User's Manual.)
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�
No
Replace the Main board or Power Supply Unit (High Voltage).
3
Black paper is output.
� Is the LED head connected properly? (Check connector HEAD1 (14P), HEAD2 (12p) on the Main board and PC connector on the LED head.) �
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No
Connect the LED head properly or replace the head cable. Is the contact of the image drum cartridge contacted with the ground contact properly. (See Figure 6-5 D .)
Yes
�
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No
Check the ground contact of the image drum cartridge. Check the connectors HEAD1 (14P) and HEAD2 (12P)
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Yes � No
Replace the LED head. Replace the connector
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� �
Yes
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Has the trouble been removed. � YES END
Note:
After replacing the LED head, set the printer in the engine maintenance mode by turning the power on while pressing the FORM FEED and ENTER keys. Set the LED head drive time. (Refer to Section 4.2.)
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�
No
Replace the Main board or Power Supply Unit (High Voltage).
