Brother MFC-9420CN Service Manual

Confidential
9-5
[ 2 ] Error codes shown in the "MACHINE ERROR X
X" messages
Error Code
(Hex)
Symptom Probable Cause Solution
Connector LCN does
not properly connected
Connect the connector
properly.
Laser unit defective Replace the laser unit
20 Laser power error
Engine controller board
defective
Replace the engine
controller board
Connector LCN does
not properly connected
Connect the connector
properly.
Laser unit defective Replace the laser unit
21 Beam detector error.
Engine controller board
defective
Replace the engine
controller board
22
NVRAM error
Main PCB defective
Replace the main PCB
Control error
Try the Power Switch
Off/On
23 Engine controller hardware
error
Engine controller board
defective
Replace the engine
controller board
Main motor defective
Replace the main motor 24 Process timing clock error.
Engine controller board
defective
Replace the Engine
controller board
Toner cartridge gear
defective
Replace the toner
cartridge.
Developer gear unit
defective
Replace developer gear
unit
Developer motor
defective
Replace the developer
motor
25 Developing motor error
Engine controller board
defective
Replace the engine
controller board.
Main motor defective
Replace the main motor 26 Main motor error.
Engine controller board
defective
Replace the engine
controller board.
Connector LCN does
not properly connected
Connect the connector
properly.
Laser unit defective Replace the laser unit
27
Scanner motor error
Engine controller board
defective
Replace the engine
controller board.

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