Brother HL-1870N - Page 217

HL-1850/1870N SERVICE MANUAL
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M-10 ROM error / D-RAM error / NV-RAM error
Possible cause Step Check Result Remedy
Main PCB 1 Is it possible to print the test
page with the method of 9.
INSPECTION MODE in this
Chapter?
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, printer
condition and system
environment.
M-11 SXX error
Possible cause Step Check Result Remedy
Main PCB 1 Is it possible to print the test
page with the method of 9.
INSPECTION MODE in this
Chapter?
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, printer
condition and system
environment.
M-12 E41 error
Possible cause Step Check Result Remedy
Process unit
ground wire
connection
1 Is the ground wire on the
process unit secured correctly?
No Secure the ground wire
correctly with the shoulder
screw
If the ground wire is bent, fix it
to a right shape with a pair of
pliers.
Corona failure 2 Is the corona wire on the
process unit dirty?
Yes Clean the corona wire with
the wire cleaner.
High-voltage
power supply
PCB failure
3 Is the high-voltage power
supply PCB fixed correctly?
Yes Reinstall the high-voltage
power supply PCB correctly.
Metallic parts
failure
(electrostatic
discharge when
feeding paper)
4 Are any metallic parts loose? Yes Secure the parts correctly.