Brother MFC-9420CN Service Manual

Confidential
3-16
(2) Process of first transfer (Refer to Fig.3-19.)
1) OPC belt that has been through the development process rotates as contacting and
synchronizing with the transfer belt and drum.
2) OPC belt has been biased to the potential of -CBV(V). Potential of the transfer belt is
nearly GND.
3) Toner on the OPC belt is moved onto the transfer belt due to the difference of
potential between the OPC belt and transfer belt.
4) Toner that has been developed by each color is moved from the OPC belt onto the
transfer belt, and two color toner image is overlapped on the transfer belt.
5) Upon completion of the first transfer process, the toner image is transferred onto a
paper in the process of paper transfer.
Residual Charge
Residual Toner
OPC Belt Discharging
(Erase Lamp PU)
OPC Belt Cleaning
(Brade)
OPC Belt
First Transfer
Fig. 3-19

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