Brother MFC-9420CN Service Manual

Confidential
3-22
3.2.3 Paper Transportation System
(1) Outline
This machine employs the automatic paper feeding with the paper tray.
When toner images are formed on the transfer belt through the operations of print system and
transfer system, a paper is fed by the paper feed roller and transported to the registration roller.
The transported paper is further transported to the transfer, fuser and exit part by the
registration roller synchronizing with the rotation of the transfer belt.
(2) Structure of paper transportation system (Refer to Fig.3-25.)
Paper transportation system consists of following parts.
1 Paper Tray PU: Case to accommodate papers to be automatically fed.
2 Paper Feed Roller PU: Roller to feed paper one by one, preventing multi-feed.
3 Registration Roller PU: Roller to transport papers as synchronizing with the
transfer belt.
4 Transfer Roller PU: Component to be built in the paper exit unit, consisting of
the paper guide, registration roller and transfer roller.
5 Fusing Unit FU: Mechanical part to fuse the toner image with the heat
roller and fix it on the paper.
6 Back Cover ASSY PU
(Paper Exit Unit):
Component to consist of the paper guide and paper exit
roller that exits the fusing-completed paper.
7 Exit Roller ASSY PU: Roller to exit papers from of the machine.
Fig. 3-25
1. Paper Tray PU
2. Paper Feed Roller PU
3. Registration Roller PU
4. Transfer Roller PU
Transfer Belt
6. Back Cover ASSY PU
(Paper Exit Unit):
5. Fusing Unit FU
7. Exit Roller 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