Brother MFC-9420CN Service Manual

Confidential
3-2
3.2 PRINTING MECHANISM
<Mechanical & Electrical Structures>
This laser beam color printer (hereinafter called “Machine”) consists of five mechanical systems;
Print, Scanning, Transfer, Paper transport and control system. The machine produces color
printing through the interactive operations of these five systems as shown in Fig.3-2.
(1) Print System
The print system consists of the following 6 (six) functional parts located around the OPC
belt which form a toner image on the OPC belt.
• Charger Part
• Exposure Part
• Development Part
• First Transfer Part
• Discharger Part
• Cleaner Part
(2) Laser Scanning System
The scanning system consists of the following 2 (two) functional parts which form an
electrostatic latent image on the OPC belt by scanning it with a laser beam.
• Scanner Unit
• Scanner Motor (SCM)
(3) Transfer System
The transfer system consists of the following 3 (three) functional parts and transfers the toner
image formed on the transfer drum onto the page.
• First Transfer (Transfer Belt)
• Second Transfer Part (Paper Transfer)
• Drum Cleaner Unit
(4) Paper Transport System
The paper transport system consists of the following 5 (five) functional parts and picks up
paper from the paper tray, separates the paper from the transfer drum and exits it from the
machine body after fusing the toner image on the paper.
• Paper Tray
• Transport Rollers
• Paper Discharger
• Fusing Unit
• Paper Exit

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