Brother MFC-8220 Service Manual

CHAPTER 6 TROUBLESHOOTING
6-32
8.3 Troubleshooting Image Defect
Several types of the image defects can be cleared by end users. For those defects, instruct
the user to check the ‘User Check’ items described in each table. Even if the same image
defect appears, the following procedures should be followed in the event of specific image
defects.
See also subsection 8.4 ‘Location of Ground Contacts’ in this Chapter for information about the
location of the grounding contacts.
!
CAUTION:
When using the machine for a special job, such as printing of name cards, print quality cannot
be guaranteed.
I-1 Light
Possible cause Step Check Result Remedy
Ground
contacts
Toner sensing
failure
(machine side)
1 Can printing be started with the
drum unit and toner cartridge
removed?
Yes Check if the toner
sensor is dirty and
check the toner
sensor connection.
Toner sensing
failure
(toner cartridge
side)
2 Is the problem solved when 4
or 5 pages are printed after the
toner cartridge is replaced with
a full one?
Yes The wiper of the toner
cartridge is defective.
Replace the toner
cartridge.
Drum
connection
failure
3 Are all the contacts between
the drum unit and machine
connected correctly?
No Clean contact
electrodes both on the
drum unit and in the
machine.
(1), (4),
(5), (6)
High-voltage
power supply
PCB failure
4 Is the harness connection
between the high-voltage
power supply PCB and the
engine PCB correct?
Yes Replace the high-
voltage power supply
PCB.
Engine PCB /
Main PCB
failure
5 Is the harness connection
between the engine PCB and
the main PCB correct?
Yes Replace the engine
PCB or the main PCB.
Dirt on the
scanner window
6 Is there any dirt on the scanner
window?
Yes Wipe it off with a soft
clean paper.
Laser unit failure 7 Is the problem solved after
replacing the laser unit?
Yes Replace the laser unit.
User Check
(1) Check the printer’s environment. Conditions such as humidity, high
temperatures, etc. may cause this situation to occur.
(2) If the whole page is light, toner save mode may be on. Disable toner save mode
within Printer Properties tab of the driver.
(3) Try installing a new toner cartridge or drum unit.

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