Brother MFC-8220 Service Manual page 201

NOTE:
•
This problem will be cleared if leaving the printer power ON for ten minutes.
•
If the heater is cooled down sufficiently, this problem may be cleared by enter the
maintenance mode after press 9 key twice. Be warned, however, that this operation
will melt the fixing unit if the heater is hot.
M-10 Main PCB failure
Possible cause Step
Main PCB 1
failure
Software bug 2
M-12 Engine PCB failure
Possible cause Step
Fixing unit 1
ground wire
connection
Harness 2
connection
failure
Engine PCB 3
failure
Main PCB 4
failure
M-14 DIMM failure
Possible cause Step
DIMM failure 1
Check
Is it possible to copy?
Does this problem appear
when printing specific data or
printing under a specific
environment?
Check
Is the ground wire on the fixing
unit secured with the shoulder
screw correctly?
Is the connection of the
connector between the main
PCB and the engine PCB
connected correctly?
Is the problem solved by
replacing the engine PCB?
Is the problem solved by
replacing the main PCB?
Check
Try installing DIMM into
another machine, then check
the memory size in Print
Settings.
Is it possible to print the data?
6-23
Result Remedy
No Replace the main PCB.
Yes Inform the Brother office of
the used specific data,
machine condition and
system environment.
Result Remedy
No Secure the ground wire
correctly with the shoulder
screw.
No Reconnect the connectors
securely.
No Replace the engine PCB.
No Replace the main PCB.
Result Remedy
Yes Replace the main PCB.
No Replace the DIMM.
MFC-8220
SERVICE MANUAL