Brother International HL 1850 Service Manual - Page 216
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HL-1850/1870N SERVICE MANUAL 1-17 Black band P Possible cause Step Check Result Remedy Corona failure Corona failure 1 Is the wire cleaner at its home position? 2 Is the corona wire dirty? No Return the wire cleaner to its home position. Yes 1) Clean the corona wire. 2) If the problem still appears after cleaning, replace the drum unit. Ground contacts (2) (2) 6-49
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HL
-1850/1870N
SERVICE
MANUAL
1-17
Black
band
P
Possible
cause
Step
Check
Result
Remedy
Ground
contacts
Corona
failure
1
Is
the
wire
cleaner
at
its
home
position?
No
Return
the
wire
cleaner
to
its
home
position.
(2)
Corona
failure
2
Is
the
corona
wire
dirty?
Yes
1)
Clean
the
corona
wire.
2)
If
the
problem
still
appears
after
cleaning,
replace
the
drum
unit.
(2)
6-49