Brother HL-3140CW User Manual page 122

Routine Maintenance
i
Repeat step c and step h to clean each of three remaining corona wires.
NOTE
When you clean the corona wires, you do not have to remove the toner cartridge from the drum unit.
j
Slide the toner cartridge and drum unit assembly into the machine. Make sure that you match the toner
cartridge colour to the same colour label on the machine.
BK
C
M
Y
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4