Brother MFC-L5750DW Service Manual

2-122
Confidential
4.13 Troubleshooting for Fax Problems
4.13.1 Fax cannot be sent
<User Check>
• Check that the line cord is inserted into the socket correctly.
• Check that the dial function setting (tone/pulse) is correct.
• Check that the fax document is set in the ADF correctly.
• Check that the handset curled cord is inserted into the socket correctly.
• Check that the handset is placed on the handset holder correctly.
• Check that the number to be dialed is saved correctly in the telephone directory.
• Check that the receiver's machine works normally or the function you want to perform is
equipped with the receiver's machine.
• Move the machine to the other place to check whether there is any noise source near
the machine.
• Replace the telephone line.
Step Cause Remedy
1
Connection failure of modem flat
cable
Reconnect the modem flat cable.
2 Connection failure of CIS flat cable Reconnect the CIS flat cable.
3
Connection failure of panel flat
cable
Reconnect the panel flat cable.
4
Connection failure of touch panel
flat cable
Reconnect the touch panel flat cable.
5
Connection failure of key PCB flat
cable
Reconnect the key PCB flat cable.
6
Connection failure of ADF cover/
document detection sensor PCB
harness
Reconnect the ADF cover/document
detection sensor PCB harness.
7
Document detection actuator
coming off
Reattach the document detection actuator.
8
First or second side CIS flat cable
failure
Replace the first or second side CIS flat
cable.
9 First or second side CIS unit failure Replace the first or second side CIS unit.
10 ADF drive gear failure Replace the ADF unit.
11 Document scanner unit failure Replace the document scanner unit.
12 Panel PCB failure Replace the panel PCB ASSY.
13 Touch panel failure Replace the touch panel ASSY.
14 Key PCB failure Replace the panel unit.
15 Modem PCB failure Replace the modem PCB ASSY.
16 Main PCB failure Replace the main PCB ASSY.

Brother MFC-L5750DW Specifications

General

N-up printing	2, 4, 9, 16, 25
Secure printing	Yes
Print technology	Laser
Maximum resolution	1200 x 1200 DPI
Duplex printing mode	Auto
Time to first page (black, normal)	7.2 s
Print speed (black, normal quality, A4/US Letter)	40 ppm
Scan to	E-mail, E-mail Server, FTP, File, Image, OCR, USB
Scan drivers	ICA, ISIS, SANE, TWAIN, WIA
Scanner type	Flatbed & ADF scanner
Grayscale levels	256
Input color depth	48 bit
Maximum scan area	A4 (210 x 297) mm
Output color depth	24 bit
Image formats supported	JPG
Maximum scan resolution	19200 x 19200 DPI
Document formats supported	PDF
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
Maximum number of copies	99 copies
N-in-1 copy function (N=)	2
Copy speed (black, normal quality, A4)	40 cpm
Faxing	Mono faxing
Fax memory	500 pages
Modem speed	33.6 Kbit/s
Fax transmission speed	2.5 sec/page
Digital sender	-
Printing colors	Black
Maximum duty cycle	50000 pages per month
Recommended duty cycle	0 - 3500 pages per month
Number of print cartridges	1
Page description languages	BR-Script 3, Epson FX, IBM ProPrinter, Microsoft XPS, PCL 6, PDF 1.7
Display	LCD
Control type	Touch
Product color	Black, Graphite
Display diagonal	3.7 \
Market positioning	Business
Email protocols	APOP, IMAP4, POP3, SMTP
Wi-Fi standards	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Cabling technology	10/100Base-T(X)
Security algorithms	64-bit WEP, 128-bit WEP, 802.1x RADIUS, APOP, EAP-FAST, EAP-MD5, EAP-PEAP, EAP-TLS, EAP-TTLS, HTTPS, IPPS, IPSEC, PEAP, SMTP-AUTH, SNMP, SSL/TLS, WPA2-PSK
Ethernet LAN data rates	10, 100 Mbit/s
Online services supported	Box, Dropbox, Evernote, Facebook, Flickr, Google Drive, OneDrive, OneNote, Picasa
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, POP3, SMTP Client, IPP/IPPS, FTP Client and Server, CIFS Client, TELNET Server, SNMPv1/v2c/v3, HTTP/HTTPS server, TFTP client and server, ICMP, Web Services (Print/Scan), SNTP Client, LDAP, IMAP4
Supported network protocols (IPv6)	NDP, RA, DNS resolver, mDNS, LLMNR responder, LPR/LPD, Custom Raw Port/Port9100, IPP/IPPS, POP3*, SMTP Client, FTP Client and Server, CIFS Client, TELNET Server, SNMPv1/v2c, HTTP/HTTPS server, TFTP client and server, ICMPv6, SNTP Client, LDAP, Web Services (Print/Scan), IMAP4
Processor family	ARM Cortex
Card reader integrated	No
Sound power level (standby)	35 dB
Sound pressure level (copying)	54 dB
Sound pressure level (quiet mode)	52 dB
Mac operating systems supported	Mac OS X 10.0 Cheetah, Mac OS X 10.1 Puma, Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.2 Jaguar, Mac OS X 10.3 Panther, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks
Mobile operating systems supported	Windows Phone, Windows RT
Server operating systems supported	Windows Server 2003, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2
Windows operating systems supported	Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 Pro, Windows 10 Pro x64, Windows 2000, Windows 2000 Professional, Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64, Windows 8.1, Windows 8.1 Enterprise, Windows 8.1 Enterprise x64, Windows 8.1 Pro, Windows 8.1 Pro x64, Windows 8.1 x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Enterprise, Windows Vista Enterprise x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64
Standard interfaces	Ethernet, USB 2.0, Wireless LAN
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.
Package depth	520 mm
Package width	545 mm
Package height	641 mm
Package weight	20200 g
Power consumption (off)	0.04 W
Power consumption (sleep)	8 W
Power consumption (standby)	34 W
Power consumption (PowerSave)	390 W
Power consumption (average operating)	645 W
Energy Star Typical Electricity Consumption (TEC)	1.832 kWh/week
Sustainability certificates	Nordic Swan Ecolabel, Blue Angel, ENERGY STAR
Paper tray media types	Plain paper, Recycled paper, Thick paper, Thin paper
Paper tray media weight	60 - 120 g/m²
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Legal (media size), Letter (media size)
ISO A-series sizes (A0...A9)	A4, A5, A6
Multi-purpose tray media types	Bond paper, Envelopes, Labels, Letterhead, Plain paper, Recycled paper, Thick paper, Thicker paper, Thin paper
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 200 g/m²
Auto Document Feeder (ADF) media weight	64 - 90 g/m²
Paper input type	Paper tray
Total input capacity	250 sheets
Total output capacity	150 sheets
Auto document feeder (ADF) input capacity	50 sheets
Certification	GS Mark
Harmonized System (HS) code	84433100

Weight and Dimensions

Depth	427 mm
Width	435 mm
Height	486 mm