Brother MFC8440D Service Manual page 251

7/13/2019
CHAPTER 6 TROUBLESHOOTING
I-17 Black band
Possible cause
Corona failure
Corona failure
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Step Check
1 Is the wire cleaner at its home
position?
2 Is the corona wire dirty?
Brother 8840D Service Manual
Result
No Return the wire cleaner
to its home position.
Yes 1) Clean the corona
2) If the problem still
6-48
Ground
Remedy
contacts
(2)
wire.
(2)
appears after
cleaning, replace
the drum unit.
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