Brother HL-5450DN Service Manual

2-79
Confidential
4.10 Troubleshooting for PCB Problems
4.10.1 Main PCB failure
4.10.2 High-voltage power supply PCB failure
4.10.3 Low-voltage power supply PCB failure
<User Check>
- Turn the power switch OFF and then ON again.
- Install the latest firmware.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1
Connection failure of the high-
voltage power supply PCB harness
Check the harness connection between the
high-voltage power supply PCB and the
main PCB ASSY, and reconnect it if
necessary.
2
Contact failure of electrode
terminals of the high-voltage power
supply PCB
Clean the electrode terminals of the high-
voltage power supply PCB.
3
High-voltage power supply PCB
failure
Replace the high-voltage power supply 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.
Step Cause Remedy
1
Connection failure of the low-
voltage power supply PCB harness
Check the connection of the low-voltage
power supply PCB harness, and reconnect
it if necessary.
2
Low-voltage power supply PCB
failure
Replace the low-voltage power supply PCB
ASSY, and reset the irregular power supply
detection counter.
3 Main PCB failure Replace the main PCB ASSY.
CAUTION:
• The irregular power supply detection error (error code EF00) occurs when there is a
large distortion in the power supply voltage supplied to the machine. In this case, if the
same power supply is used, the same error may occur even when the low-voltage
power supply PCB ASSY is replaced. Ask the user to review the installation
environment.
The following LED status also indicates that this error is current: When the Back Cover,
Toner, Drum, Paper, Error and Ready LEDs flash, press the [Go] button. The Toner,
Drum, Paper and Error LEDs remain lit. Press the [Go] button again, and the Toner and
Ready LEDs remain lit.

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