Brother MFC-9420CN Service Manual

Confidential
9-20
9.2.4 Troubleshooting Based on Problem Type
[ 1 ] Software setting problems
The machine may not print the data correctly if there are incorrect software settings.
S-1
“There was an error writing to LPT1: (or BRUSB) for the machine” error message
appears.
User Check
(1) Check that the machine cable is not damaged or broken. Check also that the cable is
connected to the correct interface connectors of both the machine and PC.
(2) Check that the correct machine is selected if you have an interface switching device.
(3) Check that the appropriate printer driver is selected as ‘Set as Default’. Check also that the
correct print port is set for the selected printer driver.
(4) Check that the machine is not connected to the same port which is also connected to a mass
storage device or scanner. Remove all other devices and connect the port to the machine
only. Turn off the machine status monitor in the device options tab in the printer driver.
(5) If the print port is set as an ECP port, change it to a normal port.
(6) Try printing the test page.
(7) Try resetting the factory settings.
Possible cause
Step
Check
Result
Remedy
Failure inside
the machine
1 Is it possible to print the
test page with the method?
No Identify the error type, then refer
to the specified section of this
chapter.
No Replace the main PCB. Main PCB
failure
2 Is it possible to print with
another PC and printer
cable?
Yes This problem may appear under
the specified system
environment. Check the
environment which the user
used.

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