Brother MFC-8480DN - B/W Laser - All-in-One User Manual

3-52
Confidential
■ Completely blank
■ Image distortion
<User Check>
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step Cause Check
Result Remedy
1
Developing bias
voltage
conduction
failure
Are the electrodes on
the drum unit and
machine body dirty?
Yes
Clean both electrodes.
(Refer to Fig. 3-2, Fig. 3-3.)
2
Scanner harness
of the laser unit
connection
failure
Is the scanner harness
of the laser unit
connected securely?
No
Reconnect the scanner
harness of the laser unit.
3
Laser unit failure Is the problem solved
after replacing the laser
unit?
Yes
Replace the laser unit.
4
HVPS PCB
failure
Is the problem solved
after replacing the
HVPS PCB ASSY?
Yes
Replace the HVPS PCB
ASSY.
5
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
Step Cause Check
Result Remedy
1
Laser unit not
assembled
correctly
Is the laser unit
assembled into the
machine securely?
(Check if there is no
gap.)
No
Assemble the laser unit
correctly and secure the
screw.
2
Incorrect
radiation angle of
scanner diode of
laser unit.
Scanner motor
rotation failure
Is the problem solved
after replacing the laser
unit?
Yes
Replace the laser unit.
3
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.

Brother MFC-8480DN - B/W Laser - All-in-One Specifications

General

Printer Type	B/W Laser
Functions	Print, Copy, Scan, Fax
Scan Resolution	Up to 19200 x 19200 dpi (interpolated)
Automatic Duplex Printing	Yes
Connectivity	USB 2.0, Ethernet
Paper Input Capacity	250 sheets
Standard Paper Capacity	250 sheets
ADF Capacity	50 sheets
Print Speed	32 ppm
Copy Resolution	1200 x 600 dpi
Scan Type	Flatbed, ADF
Max Paper Size	Legal (8.5 in x 14 in)
Print Resolution	1200 x 1200 dpi
Copy Speed	Up to 32 cpm
Dimensions	531 mm x 451 mm x 475 mm