Brother MFC-8220 - Page 201

MFC-8220
SERVICE MANUAL
6-23
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 Check Result Remedy
Main PCB
failure
1 Is it possible to copy? No Replace the main PCB.
Software bug 2 Does this problem appear
when printing specific data or
printing under a specific
environment?
Yes Inform the Brother office of
the used specific data,
machine condition and
system environment.
M-12 Engine PCB failure
Possible cause Step Check Result Remedy
Fixing unit
ground wire
connection
1 Is the ground wire on the fixing
unit secured with the shoulder
screw correctly?
No Secure the ground wire
correctly with the shoulder
screw.
Harness
connection
failure
2 Is the connection of the
connector between the main
PCB and the engine PCB
connected correctly?
No Reconnect the connectors
securely.
Engine PCB
failure
3 Is the problem solved by
replacing the engine PCB?
No Replace the engine PCB.
Main PCB
failure
4 Is the problem solved by
replacing the main PCB?
No Replace the main PCB.
M-14 DIMM failure
Possible cause Step Check Result Remedy
DIMM failure 1 Try installing DIMM into
another machine, then check
the memory size in Print
Settings.
Yes Replace the main PCB.
Is it possible to print the data? No Replace the DIMM.