2 ] "Machine Error 4F" Error Message; 3 ] Ink-Related Problems - Brother MFC260C Service Manual

[ 2 ] "MACHINE ERROR 4F" error message

The error message "MACHINE ERROR 4F" appears if the head drive voltage drops from the high
to low level in an abnormally short period. The source of the problem is mainly the head/carriage
unit.
Check
Head/carriage unit
Main PCB
Carriage PCB

[ 3 ] Ink-related problems

Problems of this nature may arise not only due to machine malfunction but also to the user's actions.
IMPORTANT: In many cases, the user fails to set ink cartridges in place.
Problems due to the user's actions
Check
Ink cartridges
Possible causes
- The carriage-head flat cable is
disconnected from the carriage
PCB.
- Piezoelectric ceramic actuator
defective. (Cracks or rare short)
- A power failure when the
machine was in operation resulted
in a damaged part.
- The drive voltage and current
supplied are too low to drive the
head/carriage unit.
- Voltage detection circuit
defective.
- Head power circuit insulation
failure.
Possible causes
- Ink cartridges are not inserted
fully into the ink refill ASSY.
- One or more of the ink cartridges
are not loaded.
- One or more of the ink cartridges
has run out of ink.
4 - 4 0
Problems that may result
At the start of printing or head
cleaning operation, correct
voltage will not be applied to
the electrodes on the surface of
the piezoelectric ceramic
actuator (described in
3, Section 3.2.2.1).
The head drive voltage drops
from the high to low level in an
abnormally short period.
The head drive voltage
becomes too high or low.
Problems that may result
The machine will not be able to
print.
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