Name: Brother HL-L2372DN
Brand: Brother
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CHAPTER 5 SERVICE FUNCTIONS

1. MAINTENANCE MODE ............................................................................................................... 5-1

1.1 How to Enter Maintenance Mode ....................................................................................... 5-1

1.1.1 Method of entering maintenance mode for service personnel ............................... 5-1

1.1.2 Method of entering end-user accessible maintenance mode ................................. 5-2

1.2 List of Maintenance Mode Functions .................................................................................. 5-3

1.2.1 List of maintenance mode functions for LCD models ............................................. 5-3

1.2.2 List of maintenance mode functions using [Go] (LED models) .............................. 5-4

1.3 Details of Maintenance Mode Functions for LCD Models ................................................... 5-6

1.3.1 Initialize EEPROM parameters (Function code 01, 91) .......................................... 5-6

1.3.2 Transition to shipping state (Function code 03) ..................................................... 5-7

1.3.3 Monochrome print quality test pattern (Function code 09) ..................................... 5-9

1.3.4 Set worker switches (WSW) and

print worker switch setting data (Function code 10, 11) ....................................... 5-10

1.3.5 Check LCD operation (Function code 12) ............................................................ 5-13

1.3.6 Check control panel key operation (Function code 13) ........................................ 5-14

1.3.7 Display software version (Function code 25) ....................................................... 5-15

1.3.8 Check sensor operation (Function code 32) ........................................................ 5-16

1.3.9 Display LAN connection status (Function code 33) .............................................. 5-17

1.3.10 Change USB No. return value / Adjust left-end print position /

Adjust upper-end print position /

Change ON/OFF setting for lower case compensation /

Change ON/OFF setting for fixation strength improvement

(Function code 45) ............................................................................................... 5-18

1.3.11 Check toner cartridge (Models with cartridge sensor only) (Function code 57) ... 5-22

1.3.12 Continuous print test (Function code 67) ............................................................. 5-24

1.3.13 Print frame pattern (single-side printing) (Function code 69) ............................... 5-28

1.3.14 Print frame pattern (duplex printing) (Function code 70) ...................................... 5-29

1.3.15 Print test pattern (Function code 71) .................................................................... 5-30

1.3.16 Setting by spec (Function code 74) ...................................................................... 5-33

1.3.17 Print maintenance information (Function code 77) ............................................... 5-36

1.3.18 Check fan operation (Function code 78) .............................................................. 5-38

1.3.19 Display machine log information (Function code 80) ........................................... 5-39

1.3.20 Display machine error code (Function code 82) ................................................... 5-41

1.3.21 Reset irregular power supply detection counter of

low-voltage power supply PCB (Function code 88) .............................................. 5-41

1.3.22 Quit maintenance mode (Function code 99) ........................................................ 5-41

1.4 Details of Maintenance Mode Functions Using [Go] (LED models) .................................. 5-42

1.4.1 Test printing .......................................................................................................... 5-42

1.4.2 Change USB No. return value .............................................................................. 5-43

1.4.3 Factory reset / Settings reset ............................................................................... 5-43

1.4.4 Engine error ignore mode ..................................................................................... 5-44

1.4.5 Check sensor operation ....................................................................................... 5-45

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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