Brother MFC-9420CN Service Manual

6-23 Confidential
6.4.6 Replacement of Transfer Unit PU (120K KIT)
<Criterion of Replacement>
Since the transfer drum is defined as periodic replacement parts as per Table 6-1, it should be
replaced when the print quality failure occurs due to failed transfer drum. The following message
appears in LCD of the control panel.
Replace 120K Kit
NOTE: At the same time, replacement of the paper feed roller, the cleaning roller, the separator
pad and the transfer unit is strongly recommended.
<Work Procedures>
Sequence of Disassembling
(1) Turn off the printer power switch.
(2) Open the
back cover.
(3) Remove the knob screw (2 pieces) of the transfer unit PU from rear.
(4) Holding the band provided at the top side of the transfer unit PU, pull out the transfer unit
PU from the inside of the frame. In this instance, do not cause the belt surface touch the
peripheral parts.
Fig. 6-32
Transfer unit PU
Knob screws
Back cover

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