Brother HL-5450DN Service Manual

2-75
Confidential
4.6 Troubleshooting for Control Panel Problems
4.6.1 Nothing is displayed on the LCD
4.6.2 LEDs are not activated
4.6.3 Control panel is inoperable
Step Cause Remedy
1 AC cord failure Replace the AC cord.
2
Connection failure of the panel
harness
Check the connection of the panel harness,
and reconnect it if necessary.
3
Connection failure of the backlight
harness
Check the connection of the backlight
harness, and reconnect it if necessary.
4
Connection failure of the LCD
harness
Check the connection of the LCD harness,
and reconnect it if necessary.
5 LCD failure Replace the LCD.
6 Backlight PCB failure Replace the backlight PCB ASSY.
7 Panel PCB failure Replace the panel PCB ASSY.
8
Low-voltage power supply PCB
failure
Replace the low-voltage power supply PCB
ASSY.
9 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 AC cord failure Replace the AC cord.
2
Connection failure of the panel
harness
Check the connection of the panel harness,
and reconnect it if necessary.
3 Panel PCB failure Replace the panel PCB ASSY.
4
Low-voltage power supply PCB
failure
Replace the low-voltage power supply PCB
ASSY.
5 Main PCB failure Replace the main PCB ASSY.
<User Check>
- Check that the function lock is not set.
Step Cause Remedy
1 Panel unit attachment failure Reattach the panel unit.
2
Connection failure of the panel
harness
Check the connection of the panel harness,
and reconnect it if necessary.
3 Rubber key failure Replace the rubber key printed ASSY.
4 Panel PCB failure Replace the panel PCB ASSY.
5
Low-voltage power supply PCB
failure
Replace the low-voltage power supply PCB
ASSY.
6 Main PCB failure Replace the main PCB ASSY.

Brother HL-5450DN Specifications

General

Color	No
N-up printing	2, 4, 9, 16, 25
Duplex printing	Yes
Print technology	Laser
Maximum resolution	2400 x 600 DPI
Time to first page (black, normal)	8.5 s
Print speed (black, normal quality, A4/US Letter)	38 ppm
Duplex print speed (black, normal quality, A4/US Letter)	9 ppm
Maximum duty cycle	- pages per month
Recommended duty cycle	1000 - 3500 pages per month
Number of print cartridges	1
Memory type	DDR2
Processor family	Star Sapphire
Maximum internal memory	320 MB
Sound power level (standby)	34 dB
Sound pressure level (printing)	59 dB
Sound pressure level (quiet mode)	54 dB
Total input capacity	250 sheets
Total output capacity	150 sheets
Maximum input capacity	800 sheets
Total number of input trays	2
Multi-Purpose tray input capacity	50 sheets
Custom media width	76.2 - 215.9 mm
Maximum print size	216 x 356 mm
Custom media length	127 - 355.6 mm
Paper tray media types	Plain paper, Recycled paper
Paper tray media weight	60 - 105 g/m²
Non-ISO print media sizes	Letter
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6
Multi-purpose tray media types	Bond paper, Envelopes, Heavyweight paper, Labels, Plain paper, Recycled paper
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 163 g/m²
Standard interfaces	Ethernet, USB 2.0
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
AC input voltage	220 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (off)	0.41 W
Power consumption (standby)	4.7 W
Power consumption (printing)	665 W
Power consumption (PowerSave)	0.6 W
Package weight	11.900 g
Sustainability certificates	ENERGY STAR

Weight and Dimensions

Dimensions (WxDxH)	371 x 384 x 245 mm