Brother MFC-L6700DW Service Manual

2-1
Confidential
CHAPTER 2 ERROR INDICATIONS &
TROUBLESHOOTING
1. INTRODUCTION
Troubleshooting is a collection of solution procedures that service personnel should follow if
an error or malfunction occurs in the machine. It is difficult to determine troubleshooting
procedures for all possible problems that may occur in the future. Therefore, this chapter
describes typical problems and recovery procedures for these. These will help service
personnel identify and repair other similar defective sections.
1.1 Precautions
Be sure to observe the following precautions to prevent any secondary problems occurring
during troubleshooting:
(1) Be sure to unplug the AC cord before removing any covers or PCBs, or adjusting the
machine.
(2) Do not hold the cable when connecting or disconnecting the cable. Be sure to hold the
connector.
(3) Static electricity charged in your body may damage electronic parts.
Before handling the PCBs, touch a metal section of the machine to discharge static
electricity. When transporting PCBs, be sure to wrap them in conductive sheets.
When replacing the PCBs, wear a grounding wrist band and perform replacement on an
antistatic mat.
Also take care not to touch the conductor sections on the flat cables.
(4) Be sure to always observe all warnings.
(5) After repair is completed, check that the repaired sections, including those removed
once and then remounted, operate normally.
A certain interface or function could be set to invalid to serve the needs of customers. Ask
sales representative if this is the case before performing the check.
Warning
Hazard labels as shown below are attached to the machine. Fully understand the
descriptions on the hazard labels and observe them during troubleshooting. Take
extreme care not to remove or damage the hazard labels.
Warning
DO NOT use any flammable spray or flammable solvent such as alcohol, benzine,
or thinner in or around the machine. Otherwise a fire or electric shock may result.

Brother MFC-L6700DW Specifications

General

Duplex printing	Yes
Print technology	Laser
Maximum resolution	1200 x 1200 DPI
Time to first page (black, normal)	7.5 s
Print speed (black, normal quality, A4/US Letter)	48 ppm
Digital sender	-
Maximum duty cycle	100000 pages per month
Recommended duty cycle	0 - 5000 pages per month
Page description languages	BR-Script 3, Epson FX, IBM ProPrinter, PCL 6, PDF 1.7
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
N-in-1 copy function (N=)	2, 4
Copy speed (black, normal quality, A4)	48 cpm
Scan to	E-mail, FTP, File, Image, OCR, USB
Scan drivers	ICA, ISIS, SANE, TWAIN, WIA
Scanner type	Flatbed & ADF scanner
Scan speed (black)	28 ppm
Scan speed (color)	20 ppm
Image formats supported	BMP, JPG, PNG, TIF
Maximum scan resolution	19200 x 19200 DPI
Duplex scan speed (black)	56 ppm
Duplex scan speed (color)	34 ppm
Document formats supported	DOCX, PDF, PPTX, XML, XPS
Email protocols	APOP, IMAP4, POP3
Wi-Fi standards	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Cabling technology	10/100/1000Base-T(X)
Security algorithms	64-bit WEP, 128-bit WEP, 802.1x RADIUS, APOP, EAP-FAST, SMTP-AUTH, SSL/TLS, WPA-PSK, WPA2-PSK
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Online services supported	Dropbox, Evernote, Google Drive, OneDrive
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
Faxing	Mono faxing
Fax memory	500 pages
Modem speed	33.6 Kbit/s
Fax transmission speed	2.5 sec/page
Total input capacity	520 sheets
Total output capacity	150 sheets
Multi-Purpose tray input capacity	50 sheets
Auto document feeder (ADF) input capacity	70 sheets
Envelopes sizes	6 3/4, 7 3/4, 9, 10
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Recycled paper
ISO A-series sizes (A0...A9)	A4, A5, A6
Duplex media weight (imperial)	17 - 24 lbs
Multi-purpose tray media types	Bond paper
Maximum ISO A-series paper size	A4
Paper tray media weight (imperial)	16 - 32 lbs
Multi-Purpose Tray media weight (imperial)	16 - 53 lbs
Display	LCD
Control type	Touch
Product color	Black
Display diagonal	4.85 \
Market positioning	Business
Internal memory	512 MB
Sound power level (standby)	35 dB
Sound pressure level (printing)	55 dB
Sustainability certificates	ENERGY STAR
AC input voltage	120 V
AC input frequency	50 - 60 Hz
Power consumption (ready)	36 W
Power consumption (sleep)	1.8 W
Power consumption (average operating)	680 W
Operating relative humidity (H-H)	20 - 80 %
Package depth	525.78 mm
Package width	599.44 mm
Package height	657.86 mm
Package weight	22089.95 g

Weight and Dimensions

Width	495.3 mm