Brother MFC-9420CN Service Manual

Confidential
5-9
(14) Pull out the fuser lamp from the fuser roller (HT).
NOTE: Since the voltage of heater lamp is subject to the destination, confirm the specified
rated voltage. (US : 120V 940W, EC : 240V 940W, JP : 100V 940W)
(15) Remove the setscrew (J) (ST3x6 with washer, 2 pieces) to remove the two terminals of the
fuser connector harness.
(16) Disconnect the connector connecting to the fuser connector FU.
(17) Remove the FU shoulder screws (K) (2 pieces) to remove the fuser connector FU from the
bottom fuser cover FU.
(18) Remove the setscrew (L) (BT3x6, 1 piece and BT3x12, 1 piece) to remove the thermistor
ASSY FU from the bottom fuser cover FU.
CAUTION
• This is the replacement work of important part in terms of the product safety. Therefore,
this work should be performed by the skillful personnel having the sound knowledge and
at the location where the safety is ensured. (Measurement of the insulation resistance
needs to be done.)
• The fusing unit and its peripheral parts are very hot (approximately 100°C). Prior to
starting the replacement work, confirm that the fusing unit and its peripheral parts are
well cooled down.
Fig. 5-5
(A): BT3x6
(A’):
Shoulder screw
Lock knob KIT FU
Top fuser cover FU
(B): Screw
Lock knob KIT FU
(C): BT3x8
(C): BT3x8
(D): Fuser shoulder screw
(G): SM3x6 with
washer
(D): ST3x6
Front fuser cover FU Bottom fuser cover FU
Fuser roller (HT)
(E): SM3x6 with washer
(F): ST3x6
Tube
(B): Screw

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