Brother MFC-8220 - Page 226

CHAPTER 6 TROUBLESHOOTING
6-48
I-21 Horizontal lines
Possible cause Step Check Result Remedy
Ground
contacts
Paper tray
connection
failure
1 Are the ground contacts on the
back of the paper tray
connecting correctly?
No Clean the electrodes.
(7)
I-22 Light rain
Possible cause Step Check Result
Remedy
Ground
contact
Drum unit failure 1 Is the problem solved after
replacing the drum unit?
Yes Replace the drum
unit.
Drum unit
connection
failure
2 Is the contact between the
drum unit and machine
connected correctly?
No Clean contact
electrode both on the
drum unit and in the
machine.
(8)
High-voltage
power supply
PCB failure
3 Is the problem solved after
replacing the high-voltage
power supply PCB?
Yes Replace the high-
voltage power supply
PCB.