Brother MFC640CW - Page 257

9-6 Confidential
Error Code
(Hex)
Symptom Probable Cause Solution
40-41 Not used.
Replace the
head/carriage unit.
Replace the power
supply PCB.
42 The head drive voltage has
not dropped from the high
to low level within the
specified period.
Piezoelectric (PZT)
ceramic actuator
defective
Replace the main PCB.
Head flat cables broken Replace the head flat
cables.
Head flat cables and
carriage-head flat cable
not connected correctly
Correct those flat
cables.
Carriage PCB defective Replace the carriage
PCB.
43 The head thermistor has
been opened or shorted
abnormally.
Main PCB defective Replace the main PCB.
Head property
parameters incorrect in
the EEPROM
Enter the correct
parameter values.
Head/carriage unit
broken
Replace the
head/carriage unit.
Head flat cables and
carriage-head flat cable
not connected correctly
Correct those flat
cables.
Head flat cables broken Replace the carriage
PCB.
Carriage-head flat
cable broken
Replace the
head/carriage unit.
44 The temperature of the
print head driver has risen
abnormally.
The head driver chip
temperature sensor in the
COF detect abnormally
high temperature.
Main PCB defective Replace the main PCB.
45 Not used.
The number of performed
purge sequences has
reached the limit.
Purge counter overflown Replace the ink absorber
box and reset the purge
counter to zero.
46
The number of flushing
operations has reached the
limit.
Flushing counter
overflown
Replace the flushing
case and reset the
flushing counter to zero.
47 Not used.