Brother MFC-8220 Service Manual

CHAPTER 6 TROUBLESHOOTING
6-24
6. TROUBLESHOOTING OF THE CONTROL PANEL
L-1 Nothing is displayed on the LCD.
User Check
(1) Verify if the power switch is turned off.
Possible cause Step Check Result Remedy
Connection
between main
PCB, and
control panel
PCB
1
Main PCB and control panel
PCB are properly connected.
No Fix the connector properly.
Harness
between main
PCB, and
control panel
PCB
2
Harness wire is damaged. Yes Replace the harness with a
normal part.
Connection
between main
PCB and low-
voltage power
supply PCB
3
Main PCB and low-voltage
power supply PCB are
properly connected.
No Fix the connection properly.
Harness
between main
PCB and low-
voltage power
supply PCB
4
Harness wire is damaged. Yes Replace the harness with a
normal part.
LCD 5
Replacement of LCD solves
the problem.
Yes Replace the LCD with a
normal part.
Control panel
PCB
6
Replacement of control panel
PCB solves the problem.
Yes Replace the control panel
PCB with a normal part.
Low-voltage
power supply
PCB
7
Replacement of low-voltage
power supply PCB solves the
problem.
Yes Replace the low-voltage
power supply PCB with a
normal part.
Main PCB 8
Replacement of main PCB
solves the problem.
Yes Replace the main PCB with
a normal part.

Brother MFC-8220 Specifications

General

Type	all in one
Tray Capacity	250
Automatic Document Feeder Capacity	30 sheets
Paper Size	letter, legal, a4, b5, a5, b6, a6, exe
Paper Handling	up to 250 sheets
Mono Print Speed	21 pages per minute
Print Resolution Mono	up to 2400 x 600
Maximum Number of Pages Per Month	up to 20, 000
Scanner Type	sheetfed
Scan Resolution	up to 300 x 600
Copier Resolution Mono	up to 600
Fax Function	yes
Cartridges	n/a
Number Of Cartridges	2
Internal Memory	yes
Network	not applicable
Connectivity	parallel, usb 2.0
OS Compatibility	pc: windows 95, 98, 98se, me, nt workstation 4.0, 2000 professional or xp, mac: os 8.6 to 9.2, os x 10.1, 10.2.1 to 10.3 or later, available usb 2.0 or parallel port
Mobile Devices Connection	no

Weight and Dimensions

Height	13.2 inches
Width	17 inches
Net Weight	25.6 pounds