Brother MFC-J3930DW Service Manual

Confidential
2-1
CHAPTER 2 TROUBLESHOOTING
1 INTRODUCTION
This section gives the service personnel some of the troubleshooting procedures to be
followed if an error or malfunction occurs with the machine. It is impossible to anticipate
all of the possible problems which may occur in future and determine the
troubleshooting procedures, so this section covers some sample problems. However,
those samples will help service personnel pinpoint and repair other defective elements
if he/she analyzes and examines them well.
1.1 Precautions
For precautions in a check based on troubleshooting, see "Precautions for
Troubleshooting and/or Disassembly/Assembly". (Refer to page: x)
1.2 Initial Check
Prior to proceeding to the troubleshooting procedures, make the following initial
checks:
Environmental conditions
(1) The machine is placed on a flat, firm surface.
(2) The machine is used in clean environment with temperature (10 to 35 degree-C)
and humidity (20 to 80 %.)
(3) The machine is not exposed to direct sunlight, excessive heat, moisture, or dust.
(4) The machine is transported in level.
Power requirements
(1) The power requirements described in label of the machine is supplied. Its variation
is within +/-10% of the rated voltage.
(2) All cables and harnesses are firmly connected.
(3) The fuses are not blown.
Recording paper
(1) A recommended type of paper is being used (refer to Chapter 1, Section 10 "PAPER")
(2) The recording paper is not dampened.
Consumable Parts
(1) Ink cartridge (4 colors) is correctly set, or ink is properly refilled.
Head/carriage unit
(1) Repeat purge action (maintenance code 76) for a couple of times. (Refer to
Chapter 5, Section 1.3.28 "Purge Operation (Maintenance mode 76)".)
Others
(1) Low temperature
Motor may not run correctly due to excessive load for each drive in low
temperature environment. Warm the room temperature in such case.

Brother MFC-J3930DW Specifications

General

Card reader integrated	No
Sound power level (printing)	63.8 dB
Sound pressure level (printing)	50 dB
Scan to	E-mail, E-mail Server, FTP, File, Image, OCR, USB
Scan drivers	ICA, SANE, TWAIN, WIA
Scanner type	ADF scanner
Duplex scanning	Yes
Grayscale levels	256
Input color depth	48 bit
Maximum scan area	297 x 431.8 mm
Output color depth	24 bit
Duplex scanning mode	Auto
Input grayscale depth	16 bit
Output grayscale depth	8 bit
Image formats supported	JPEG, TIFF
Maximum scan resolution	19200 x 19200 DPI
Document formats supported	PDF, XPS
Optical scanning resolution	1200 x 2400 DPI
N-up printing	2, 4, 6, 9, 16, 25
Print technology	Inkjet
Maximum resolution	4800 x 1200 DPI
Duplex printing mode	Auto/Manual
Print speed (ISO/IEC 24734) mono	22 ipm
Print speed (ISO/IEC 24734) color	20 ipm
Time to first page (color, normal)	6 s
Print speed (black, normal quality, A4/US Letter)	35 ppm
Print speed (color, normal quality, A4/US Letter)	27 ppm
Display	LCD
Control type	Buttons, Touch
Product color	Gray
Display diagonal	3.7 \
Market positioning	Home & office
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Cabling technology	10/100Base-T(X)
Security algorithms	802.1x RADIUS, APOP, 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, IPP, FTP/FTPs Client FTP Server, SNMPv1/v2c/v3, TFTP server, SMTP Client, ICMP, Web Services (Print/Scan), CIFS Client, SNTP Client, POP3, LDAP, IMAP4, HTTP Server
Supported network protocols (IPv6)	NDP, RA, mDNS, LLMNR Responder, DNS Resolver, LPR/LPD, Custom Raw Port/Port9100, IPP, FTP/FTPs Client FTP , SNMPv1/v2c/v3 , TFTP server, Web Services (Print/Scan), SMTP Client, POP3*, CIFS Client, SNTP Client, LDAP, IMAP4*, ICMPv6, HTTP Server
Printing colors	Black, Cyan, Magenta, Yellow
Duplex functions	Copy, Fax, Print, Scan
Maximum duty cycle	2000 pages per month
Recommended duty cycle	0 - 30000 pages per month
Number of print cartridges	4
Copier resize	25 - 400 %
Maximum copy resolution	600 x 600 DPI
Maximum number of copies	99 copies
N-in-1 copy function (N=)	2, 4
Package depth	568 mm
Package width	681 mm
Package height	500 mm
Package weight	28300 g
Quantity per pack	1 pc(s)
Paper input type	Paper tray
Total input capacity	650 sheets
Paper tray 1 input capacity	250 sheets
Multi-Purpose tray input capacity	100 sheets
Auto document feeder (ADF) input capacity	50 sheets
Faxing	Color faxing
Fax memory	200 pages
Modem speed	33.6 Kbit/s
Fax forwarding to	E-mail, Fax, PC
AC input voltage	220 - 240 V
Power consumption (off)	0.04 W
Power consumption (ready)	6.5 W
Power consumption (sleep)	1.7 W
Power consumption (copying)	29 W
Envelopes sizes	Com-10, DL, Monarch
Photo paper sizes	9x13, 10x15, 13x18 cm
Custom media width	105 - 297 mm
Custom media length	148 - 431.8 mm
Paper tray media types	Coated paper, Envelopes, Glossy paper, Photo paper, Plain paper, Recycled paper
Paper tray media weight	64 - 220 g/m²
ISO A-series sizes (A0...A9)	A3, A4, A5, A6
Maximum ISO A-series paper size	A3
Multi-Purpose Tray media weight	64 - 260 g/m²
Auto Document Feeder (ADF) media weight	60 - 120 g/m²
Mac operating systems supported	Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.9 Mavericks
Other operating systems supported	ChromeOS
Server operating systems supported	Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2
Windows operating systems supported	Windows 10, Windows 7, Windows 8, Windows 8.1

Weight and Dimensions

Depth	477 mm
Width	575 mm
Height	374 mm