Brother HL-5040 - Page 203

HL-5030/5040/5050/5070N SERVICE MANUAL
6-23
M-12 Engine PCB error
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 between
connector CN8(HL-
5030/5040/5050), CN9(HL-
5070N) on the main PCB and
connector CN10 on the engine
PCB secure?
No Reconnect the connectors
securely.
Engine PCB 3 Is the problem solved by
replacing the engine PCB?
Yes Replace the engine PCB.
Main PCB 4 Is the problem solved by
replacing the main PCB?
Yes Replace the main PCB.
M-14 DIMM failure
Possible cause Step Check Result Remedy
DIMM failure 1 Try installing DIMM into
another printer, then check the
memory size in Print Settings.
Yes Replace the main PCB.
Is it possible to print the data? No Replace the DIMM.