Brother HL-L2372DN User Manual

2-83
Confidential
4.8 Troubleshooting for Fuser Unit Problems
4.8.1 Fuser unit failure
4.9 Troubleshooting for Laser Unit Problems
4.9.1 Laser unit failure
<User Check>
• Turn ON the power switch, then open the front cover and the back cover. Leave the machine
for a while to remove condensation.
Step Cause Remedy
1
Connection failure of the
center thermistor harness
Reconnect the center thermistor harness.
2
Connection failure of the side
thermistor harness
Reconnect the side thermistor harness.
3
Connection failure of the
heater harness
Reconnect the heater harness.
4
Connection failure of the eject
sensor PCB harness
Reconnect the eject sensor PCB harness.
5 Eject sensor PCB failure Replace the eject sensor PCB ASSY.
6
Low-voltage power supply
PCB failure
Replace the low-voltage power supply PCB
ASSY.
7 Fuser unit failure Replace the fuser unit.
8 Main PCB failure Replace the main PCB ASSY.
Note:
• Turn the power switch OFF and then ON again. Leave the machine for 15 minutes.
This problem may then be cleared.
• The machine may recover from the error, when the test printing of the maintenance mode
for service personnel is started. However, conducting this operation while the heater has
not yet cooled may cause the fuser unit to melt. Be careful.
Step Cause Remedy
1 Laser unit attachment failure Reattach the laser unit.
2
Connection failure of the laser
unit flat cable
Reconnect the laser unit flat cable.
3
Connection failure of the
polygon motor harness
Reconnect the polygon motor harness.
4 Laser unit failure Replace the laser unit.
5 Main PCB failure Replace the main PCB ASSY.

Brother HL-L2372DN Specifications

General

Color	No
N-up printing	2, 4, 6, 9, 16, 25
Duplex printing	Yes
Print technology	Laser
Maximum resolution	1200 x 1200 DPI
Duplex printing mode	Auto
Warm-up time (from sleep mode)	9 s
Print speed (black, normal quality, A4/US Letter)	34 ppm
Duplex print speed (black, normal quality, A4/US Letter)	16 ppm
Sustainability certificates	Blue Angel, ENERGY STAR
Display	LCD
Certification	Nordic Swan, GS Mark
Product color	Black
Market positioning	Home & office
Display number of lines	1 lines
Internal memory	64 MB
Noise level (ready)	30 dB
Maximum internal memory	- MB
Sound pressure level (printing)	49 dB
Sound pressure level (quiet mode)	44 dB
Power consumption (off)	0.03 W
Power consumption (ready)	48 W
Power consumption (standby)	6 W
Power consumption (printing)	510 W
Energy Star Typical Electricity Consumption (TEC)	1.227 kWh/week
Printer fonts	Barcode, Bitmap, PCL, Scalable
Maximum duty cycle	15000 pages per month
Recommended duty cycle	0 - 2000 pages per month
Page description languages	PCL 6
Quantity per pack	1 pc(s)
Package depth	360 mm
Package width	356 mm
Package height	183 mm
Package weight	7200 g
Cables included	AC
Included cartridge capacity (black)	700 pages
Cabling technology	10/100Base-T(X)
Security algorithms	SMTP-AUTH, SNMPv3, SSL/TLS
Ethernet LAN data rates	10, 100 Mbit/s
Mobile printing technologies	Apple AirPrint, Brother iPrint & Scan, Google Cloud Print, Mopria Print Service
Supported network protocols (IPv4)	ARP, RARP, BOOTP, DHCP, APIPA(Auto IP), WINS/NetBIOS name resolution, DNS Resolver, mDNS, LLMNR responder, LPR/LPD, Custom Raw Port/Port9100, SMTP Client, IPP/IPPS, FTP Server, SNMPv1/v2c/v3, HTTP/HTTPS server, TFTP client and server, ICMP, Web Services (Print), SNTP Client
Supported network protocols (IPv6)	NDP, RA, DNS resolver, mDNS, LLMNR responder, LPR/LPD, Custom Raw Port/Port9100, IPP/IPPS, SMTP Client, FTP Server, SNMPv1/v2c/v3, HTTP/HTTPS server, TFTP client and server, ICMPv6, SNTP Client, Web Services (Print)
Mac operating systems supported	Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac OS X 10.14 Mojave, Mac OS X 10.15 Catalina, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks
Server operating systems supported	Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016
Windows operating systems supported	Windows 10, Windows 7, Windows 8
Custom media width	76.2 - 215.9 mm
Custom media length	127 - 355.6 mm
Duplex media weight	60 - 105 g/m²
Paper tray media types	Plain paper, Recycled paper
Paper tray media weight	60 - 163 g/m²
ISO A-series sizes (A0...A9)	A4, A5, A6
Multi-purpose tray media types	Bond paper, Envelopes, Labels, Plain paper, Recycled paper
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 230 g/m²
Total input capacity	250 sheets
Total output capacity	150 sheets
Total number of input trays	1
Multi-Purpose tray input capacity	1 sheets

Weight and Dimensions

Depth	283 mm
Width	438 mm
Height	519 mm