Brother MFC-8480DN Service Manual

3-77
Confidential
11. DOCUMENT FEEDING PROBLEMS
Problems related to document feeding are end user recoverable if following the User Check
items. If the same problem occurs again, follow each procedure in the order of the number
described in the Step column in the tables below.
11.1 No Feeding
<User Check>
- Check if the document is inserted correctly to the depths.
- Check whether the document is 50 or less sheets. (CCD model)
Check whether the document is 20 or less sheets. (CIS model)
- Check if the ADF cover is closed.
Step Cause Check
Result Remedy
1
Document front
actuator 1
catching on some
position
Does the document front
actuator 1 move
smoothly?
No
Re-assembly the
document front actuator
1.
2
Document front
sensor 1 harness
connection failure
Is the harness of the
document front sensor 1
connected securely?
No
Reconnected the harness
of the document front
sensor 1.
3
ADF motor
harness
connection failure
Is the harness of the ADF
motor connected
securely?
No
Reconnected the harness
of the ADF motor.
4
Document front
sensor 1
malfunction
Does the document front
sensor 1 move smoothly?
(Check it following the
procedure described in
“Maintenance mode 32”)
No
Replace the document
front sensor 1.
5
Feed roller holder
ASSY failure
Though the ADF motor
rotates, does the supply
roller rotate?
Yes
Replace the feed roller
holder ASSY.
6
ADF relay PCB
failure
Is the problem solved
after replacing the ADF
relay PCB?
Yes
Replace the ADF relay
PCB.
7
Driver PCB failure Is the problem solved
after replacing the driver
PCB?
Yes
Replace the driver PCB.
8
ADF motor failure Is the problem solved
after replacing the ADF
motor?
Yes
Replace the ADF motor.
9
Main PCB failure Is the problem solved
after replacing the main
PCB?
Yes
Replace the main PCB.

Brother MFC-8480DN Specifications

General

Print technology	Laser
Maximum resolution	1200 x 1200 DPI
Economical printing	Yes
Print speed (black, normal quality, A4/US Letter)	32 ppm
Grayscale levels	256
Input color depth	48 bit
Image formats supported	BMP, JPG, TIF
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	600 x 2400 DPI
Copier resize	25 - 400 %
Maximum number of copies	99 copies
Copy speed (black, normal quality, A4)	32 cpm
Faxing	Mono faxing
Fax memory	600 pages
Modem speed	33.6 Kbit/s
Power supply type	AC
Weight (imperial)	40.3 lbs
Dimensions (WxDxH)	530.8 x 449.5 x 474.9 mm
Power requirements	110 - 240V, 50/60 Hz
All-in-one functions	Copy, Fax, Scan
Standard media sizes	2.75'' - 8.5\
Maximum internal memory	0.576 GB
Color all-in-one functions	scan, n
Compatible operating systems	Windows OS Mac OS
Package dimensions (W x D x H)	24.7 x 22.3 x 22.6 \
Total input capacity	250 sheets
Total output capacity	150 sheets
Auto document feeder (ADF) input capacity	50 sheets
Display	LCD
Market positioning	Business
Internal memory	64 MB
Sound pressure level (copying)	56 dB
Sound pressure level (printing)	30 dB
Maximum print size	216 x 356 mm
Paper tray media types	Bond paper, Envelopes, Plain paper, Recycled paper, Transparencies
Non-ISO print media sizes	Executive
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6
Maximum ISO A-series paper size	A4
Supported network protocols (IPv4)	ARP, RARP, BOOTP, DHCP, APIPA, LLMNR, LPR/LPD, IPP/IPPS, FTP, HTTP/HTTPS, SSL/TLS, TFTP, SMTP, APOP, POP, SMTP, SMTP-AUTH, SNMPv1/v2c/v3, ICMP, LLTD, CIFS, SNTP, NDP, RA, DNS, mDNS, ICMPv6
Standard interfaces	USB 2.0
USB 2.0 ports quantity	1
Power consumption (standby)	18 W
Power consumption (average operating)	680 W
Package weight	21645 g
Sustainability certificates	ENERGY STAR
Maximum duty cycle	30000 pages per month
Recommended duty cycle	3500 pages per month
Operating temperature (T-T)	10 - 32.2 °C
Operating relative humidity (H-H)	20 - 80 %