Brother HL-2030 Service Manual page 204

CHAPTER 7 TROUBLESHOOTING
I-17 Black band
Possible cause
Corona failure
Corona dirty
I-18 Gray background
Possible cause
Print paper
Toner sensor
failure
(printer side)
Toner cartridge
failure
Drum unit failure
NOTE:
The following cases increase the possibility of this problem.
• Acid paper is being used.
• The drum unit is at the end of its life.
• There is dust or paper powder.
Step Check
1 Is the wire cleaner at its home
position?
2 Is the corona wire dirty?
Step Check
1 Does the paper being used
meet the paper specification
(weight, etc.).
2 Is Ready LED still lighted after
the toner cartridge and drum
unit are taken out? (The front
cover is closed.)
3 Is the problem solved after
replacing the toner cartridge?
4 Is the problem solved after
replacing the drum unit?
Result
No Return the wire cleaner
to its home position.
Yes 1) Clean the corona
2) If the problem still
Result
No Recommend to use the
specified types of paper.
Yes Recommend to change to
freshly unpacked paper.
Yes Toner sensor failure. Clean the
toner sensor and check the
toner sensor connection.
Yes Replace the toner cartridge.
Yes
Replace the drum unit.
No Replace the high-voltage power
supply PCB.
7-40
Remedy
contacts
wire.
appears after
cleaning, replace
the drum unit.
Remedy
Confidential
Ground
(2)
(2)