Brother MFC-9420CN Service Manual

Confidential
3-11
[ 3 ] Details of each process
1 Charging
The charging process means that OPC belt is evenly charged by the OPC charger roller PU.
(1) Structure of the charger unit (Refer to Fig.3-9 and Fig.3-12)
1) OPC charger roller PU is located as shown in Fig.3-9.
2) Charge high voltage is applied to the OPC charger roller PU.
3) Brush surface of the charger roller contacts and charges the OPC belt surface evenly.
CHV
OPC Belt
OPC Charger Roller PU
Fig. 3-12
(2) Process of charging (Refer to Fig.3-13.)
1) The status of the OPC belt surface before charging is -CBV(V).
2) OPC charger roller PU charges evenly the OPC belt surface till -V
0
(V) by generating
negative charge.
Charging
Cleaning
(Blade)
OPC Charger Roller PU
Fig. 3-13

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