Brother MFC-3340CN Service Manual page 256

Error Code
(Hex)
40 Not used.
41 The head drive voltage has
dropped from the high to
low level in an abnormally
short period.
42 The head drive voltage has
not dropped from the high
to low level within the
specified period.
43 The head thermistor has
been opened or shorted
abnormally.
44 The temperature of the
print head driver has risen
abnormally.
The head driver chip
temperature sensor in the
COF detects abnormally
high temperature.
45 Not used.
46 The number of performed
purge sequences has
reached the limit.
The number of flushing
operations has reached the
limit.
47 Not used.
48 Weak connection of the
head flat cables.
Symptom
9 - 5
Probable Cause
Piezoelectric (PZT)
ceramic actuator
defective (Cracks or rare
short)
Piezoelectric (PZT)
ceramic actuator
defective
Head flat cables broken
Head flat cables and
carriage-head flat cable
not connected correctly
Carriage PCB defective
Main PCB defective
Head property
parameters incorrect in
the EEPROM
Head/carriage unit
broken
Head flat cables and
carriage-head flat cable
not connected correctly
Main PCB defective
Purge counter
overflowed
Flushing counter
overflowed
Head flat cables or
carriage-head flat cable
broken or not connected
Solution
Replace the head/carriage
unit.
Replace the head/carriage
unit.
Replace the head flat
cables.
Correct those flat cables.
Replace the carriage
PCB.
Replace the main PCB.
Enter the correct
parameter values.
Replace the head/carriage
unit.
Correct those flat cables.
Replace the main PCB.
Replace the ink absorber
box and reset the purge
counter.
Replace the flushing case
and reset the flushing
counter.
Replace those cables or
correct their connection.
Confidential