Brother MFC-9420CN Service Manual

Confidential
3-25
3.3 STRUCTURE OF THE CONTROL SYSTEM
3.3.1 Basic Structure
[ 1 ] Electrical system and function
Most of the main electrical parts of this machine are controlled by the MCTL (engine controller)
PCB.
<Structure of the Sequence Control>
The basic structure of the sequence control is shown in Fig.3-28.
Print Process Control: To control the print process from the paper feed through
paper exit.
Laser Output Control: To control automatically the laser output to the default.
Fuser Temperature Control: To control the fuser heater so that temperature of fuser
roller and back-up roller will be the default.
Toner Sensing Control: To control the sensing procedures of toner empty status.
Interface Control:
(Video Signal)
To process the input and output signal with the external
controller (host).
Control Panel Indicator: To display the machine operation status in the operator
panel indicator.
Error Control: To control the safe stop procedures when errors occur in
the machine.

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