Brother MFC-9420CN Service Manual

Confidential
5-7
5.1.4 Fusing Unit
[ Caution and Request for Replacement of Maintenance Parts ]
(1) The fuser unit is the unit replaceable component and consists of the important
parts that are important for the product safety. The disassembly and replacement
of the maintenance parts shall be performed by the skillful personnel having
completed the appropriate training and at the appropriate location having the
test facilities for the product safety test.
(2) The wiring of the fusing unit is different subject to the voltage specification,
and therefore the wrong installation may cause the H2 error.
(3) When replacing the fusing unit, leave the machine for approx. ten minutes while
the power supply of the machine is ON. Then, turn it off and replace the unit.
[ Description of Applicable Work ]
Replacement of Fuser Lamp, Installation of Heater, and Internal Wiring:
Pin Assignment : 120V - , 240V -
1
.
THS1
THS2
940W
Fuser Connector
Discharge Terminal
Fuser Lamp
Connector Pin No.
To be connected to
the fuser metal frame
(Side Panel)
Insulation Resistance Tester
Thermostat (1)
Thermostat (2)
120V
240V
FG
1
3
4
2
2 3 4
[ Confirmation of Safety ]
Method of
Measurement for
Insulation Resistance:
Connect the insulation
resistance tester as
shown in the figure
above.
Judgment Criteria:
The insulation
resistance to be
100M or greater.
1
2
Caution
1
4
1
3

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