Brother MFC-9420CN Service Manual

Confidential
9-6
Error Code
(Hex)
Symptom Probable Cause Solution
28 Charge HV unit error HV Power Supply
defective
Replace the HV Power
Supply PCB
29 LVPS error. LV Power Supply
defective
Replace the LV Power
Supply PCB
Fuser thermistor
defective
Replace the fuser unit
2A Fuser thermistor error
Engine controller board
defective
Replace the engine
controller board.
Breakdown of Heater
On/Off Circuit
Replace the LV Power
Supply PCB
2B
Fuser heater error.
Breakdown of Temp
Control Circuit
Replace the engine
controller board
Contact Failure of
Harness Connector
Confirm the connection of
Harness Connector
2C
Fuser temperature low error at
warming-up.
Low Input Voltage Connect the printer with
the rated voltage
source.
2D
Fuser temperature low error Low Input Voltage Connect the printer with
the rated voltage
source.
Breakdown of Heater
On/Off Circuit
Replace the LV Power
Supply PCB
2E
Fuser temperature high error
Breakdown of Temp
Control Circuit
Replace the engine
controller board
Breakdown of Heater
On/Off Circuit
Replace the LV Power
Supply PCB
2F
Fuser ACOFF error.
Breakdown of Temp
Control Circuit
Replace the engine
controller board
Erase lamp defective Replace the erase lamp 30
Erase LED error
Engine controller board
defective
Replace the engine
controller board.
Power supply fan
defective
Replace the power supply
fan
31
Power supply fan error
Engine controller board
defective
Replace the engine
controller board.
Exit fan defective
Replace the exit fan 32
Exit fan error
Engine controller board
defective
Replace the engine
controller board.
Laser unit fan ASSY
defective
Replace the Laser unit fan
ASSY
33
Laser unit fan ASSY 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