Brother HL-5280DW Service Manual

HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Confidential
4-41
(I-3) Completely blank
Possible cause Step Check Result Remedy
Ground
contacts
Developing bias
contact failure
1 Are the developing bias
contacts between the printer
body and drum unit dirty?
Yes Clean the electrodes
at both sides.
(4)
Yes Clean the shaft and
the electrode.
(1)
Drum unit 2 Are the drum shaft and drum
electrode of the printer body
connected correctly?
No Check the connection
between the shaft and
the electrode.
(1)
Drum unit failure 3 Is the problem solved after
replacing the drum unit?
Yes Replace the drum
unit.
Toner cartridge
failure
4 Is the problem solved after
replacing the toner cartridge?
Yes Replace the toner
cartridge with a new
one.
Scanner
harness
connection
failure
5 Is the scanner harness
connected securely?
(Check if there is any play in
the connection.)
No Reconnect the
connector correctly.
Main PCB
failure
6 Are printing signals being input
to the laser unit?
Is the problem solved after
replacing the main PCB?
Yes Replace the main
PCB.
Yes Replace the laser unit. Laser unit failure 7 Is the scanner interlock lever
damaged?
Is the scanner mirror broken or
loose?
No Replace the high-
voltage power supply
PCB.

Brother HL-5280DW Specifications

General

Brand	Brother
Model	HL-5280DW
Category	Printer
Language	English