Brother MFC-9420CN Service Manual

Confidential
9-50
[ 3 ] Paper transport error
Paper is transported through the path shown in Fig.9-27. Paper jams at the following locations are
easily cleared.
• Paper Feeding Part • Fuser Part
• Transfer Part • Paper Exiting Part
Fig. 9-27
(1) Feed Jam
Problem item P# Check item Result Corrective action
1
Is the print paper the
recommended paper?
NO
Use the recommended
paper.
Print Paper
2
Is the print paper humid?
(Has the paper been
abandoned?)
YES
Replace the existing
papers with new papers.
3
Is the print paper set in
place?
NO
Set the paper in the proper
place.
Paper Cassette PU
4
Is the end plate properly set
up?
NO
Set the end plate to meet
the paper size.
5
Is the print paper caught in
the paper feeder part?
YES
Remove the paper being
caught.
Pick-up Roller PU
6
Is the paper feed roller
damaged?
NO
Replace the damaged
paper feed roller.
Toner cartridge PU
(K, Y, M, C)
Paper tray PU
Belt cartridge PU
Transfer belt
Paper feed roller PU
Transfer roller ASSY PU
Registration roller ASSY PU
Top cover PU
Paper exit roller ASSY PU
Cleaning roller PU
Fusing Unit FU
Back cover ASSY PU

Brother MFC-9420CN Specifications

General

Print technology	Laser
Maximum resolution	1200 x 2400 DPI
Economical printing	Yes
Print speed (black, normal quality, A4/US Letter)	31 ppm
Print speed (color, normal quality, A4/US Letter)	8 ppm
Digital sender	No
Number of print cartridges	4
Scanner type	Flatbed scanner
Scanner features	Scan to: e-mail, image, OCR, file
Copier resize	25 - 400 %
Maximum copy resolution	600 x 600 DPI
Maximum number of copies	99 copies
Copy speed (black, normal quality, A4)	31 cpm
Copy speed (color, normal quality, A4)	8 cpm
Faxing	Color faxing
Fax memory	500 pages
Modem speed	33.6 Kbit/s
Fax speed dialing (max numbers)	200
Total input capacity	750 sheets
Maximum input capacity	250 sheets
Auto document feeder (ADF) input capacity	35 sheets
Maximum internal memory	576 MB
Bundled software	ScanSoft PaperPort Presto! PageManager
I/O ports	IEEE-1284 USB 2.0
Dimensions (WxDxH)	483.5 x 514 x 530 mm
Printer management	BRAdmin Professional, MIB-II
Networking features	10Base-T/100Base-TX
All-in-one functions	Fax, Scan
Color all-in-one functions	copy, fax, print, scan
Compatible operating systems	Windows 98(SE)/ Me/ NT WorkStation 4.0/ 2000 Professional/ XP Mac OS 9.1 - 9.2, Mac OS X 10.2.4+
Sustainability certificates	ENERGY STAR
Power consumption (standby)	85 W
Power consumption (PowerSave)	16 W
Power consumption (average operating)	1090 W
Operating temperature (T-T)	10 - 32 °C
Operating relative humidity (H-H)	20 - 80 %
Market positioning	Business