CHAPTER 4 TROUBLESHOOTING
Confidential
4-54
(I-19) Hollow print
Possible cause Step Check Result Remedy
Yes Recommend to use the
specified types of paper.
Print paper 1 Is thick paper of more than
43lb being used or extremely
rough surface paper?
No Refer and compare with I-15.
(I-20) Downward fogging of solid black
Possible cause Step Check Result Remedy
Toner cartridge
failure
1 Is the problem solved after
replacing the toner cartridge?
Yes Replace the toner cartridge.
High-voltage
power supply
PCB failure
2 Is the problem solved after
replacing the high-voltage
power supply PCB?
Yes Replace the high-voltage power
supply PCB.
(I-21) Horizontal lines
Possible cause Step Check Result
Remedy
Paper tray
contacts
1 Are the ground contacts on the
right side of the paper tray
connecting correctly?
No Clean the contacts.
Drum unit 2 Are the high-voltage power
supply and drum unit contacted
correctly?
No Clean the contacts.
User Check
(1) Check the paper used meets the recommended paper specifications.
(2) Select the ‘Thick paper mode’ in the printer driver, or use thinner paper than you
are currently using.
(3) Check the printer’s environment, conditions such as high humidity may cause this
situation to occur.
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