Brother MFC 5490CN - Color Inkjet - All-in-One, Service Manual

Page: 100 / 439

4-10 Confidential
Error Code
(Hex)
Symptom Probable Cause Solution
43 The head thermistor has
been opened or shorted
abnormally. Head flat cables not
connected correctly Correct those flat cables.
Head flat cables broken Replace the carriage PCB
ASSY.
Carriage PCB defective
Main PCB defective Replace the main PCB.
44 The temperature of the
print head driver has
risen abnormally.
The head driver chip
temperature sensor in
the head driver detects
abnormally high
temperature.
Head property parameters
incorrect in the EEPROM Enter the correct parameter
values.
Air bubbles in the head/
carriage unit Perform the initial purge.
Head flat cables and
carriage-head flat cable not
connected correctly Correct those flat cables.
Head flat cables broken Replace the carriage PCB
ASSY.
Carriage-head flat cable
broken Replace the head/carriage unit.
Head/carriage unit broken
Main PCB defective Replace the main PCB.
45 Not used.
46 The number of
performed purge
sequences has reached
the limit.
The ink absorber box
may be filled with
drained ink.
Purge counter overflown Replace both the ink absorber
box and flushing box and reset
their counters. (When you need
to replace the ink absorber box
or flushing box, replace both.)
(Refer to page 7-35 or page 9-
48 .)
The number of flushing
operations has reached
the limit.
The flushing box may be
filled with drained ink.
Flushing counter overflown
47 Not used.
48 Weak connection of the
head flat cables. Head flat cables or carriage-
head flat cable broken or not
connected Correct the connection of the
head flat cables.
Replace the carriage PCB
ASSY.
Replace the head/carriage unit.
Replace the main PCB.