Brother MFC-9420CN Service Manual

Confidential
5-58
5.1.47 Power Supply Fan PU / Interlock Switch PU (Top, Paper Exit) / Power Supply Fan
Duct PU
(1) Remove the setscrew (BT4x10, 1 piece) of the power supply fan ASSY PU.
(2) Remove the power supply fan ASSY PU from the frame.
(3) Disconnect the connector connecting to the power supply fan ASSY PU.
[Interlock switch PU (top, paper exit)]
(4) Remove the power supply fan PU from the power supply fan duct PU.
(5) Remove the interlock switch PU (top) from the power supply fan duct PU.
(6) Remove the interlock switch PU (paper exit) from the power supply fan duct PU.
CAUTION
• Do not have the fan duct ASSY step on the harness.
• Interlock Switch is the important part in terms of the safety. The replacement work of the
interlock switch should be done by the skilled personnel having the sound knowledge on
the product safety.
• This interlock switch PU is the part of unique specification. Do not use any switch other
the specified.
• Each interlock switch PU (3 kinds) at the front, top and paper exit is the same
specification.
• After the replacement, confirm the normal operation of the interlock switch.
• Confirm that the message "Door open" is indicated on the operator panel when the front
door is open.
Fig. 5-94
Powe
r
supply fan duct PU
Power supply fan ASS
Y
PU
Interlock switch PU (top)
Interlock switch PU (paper exit)
BT4x10
Powe
r
supply fan PU

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