Brother MFC-9420CN Service Manual

Confidential
3-17
5 Belt Discharging (Erase Lamp)
OPC belt discharging process means that upon completion of the first transfer process, LED
light is radiated on the OPC belt prior to cleaning the belt to discharge the residual charge for
electrical cleaning.
(1) Structure of erase lamp PU
1) Erase lamp PU is located as shown in Fig.3-9.
2) Luminous source of erase lamp is the 6 pieces of light emitting diodes (LED).
(2) Process of discharging (Refer to Fig.3-20.)
1) Though a toner image is transferred to the transfer belt in the first transfer process,
there is still a residual charge on the OPC belt.
2) Residual charge -VR(V) on the OPC belt is discharged by the radiation of erase
lamp's light prior to cleaning the belt.
OPC Belt
Discharging
(Erase Lamp PU)
OPC Belt Cleaning
(Brade)
First Transfer
OPC Belt
Fig. 3-20

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