Brother MFC5490CN Service Manual page 105

Error Code
Symptom
(Hex)
72 Cannot detect the origin
of the cap lift cam.
73 Fails to switch the cap
lift cam positions.
74-79 Not used.
7A Abnormal stop of cap
lift cam.
7B-7C Not used.
7D Current protection for
the driver IC activated
when the cap lift cam
was being driven.
7E No head parameters
stored in the EEPROM.
(This code may appear
only in the maintenance
mode.)
7F Not used.
Probable Cause
Cap lift cam switch defective Replace the maintenance unit.
ASF encoder sensor
defective
ASF motor defective
Main PCB defective
Cap lift cam switch defective Replace the maintenance unit.
ASF encoder sensor
defective
ASF motor defective
Main PCB defective
Foreign materials in the
head capping mechanism
ASF encoder sensor
defective
ASF motor defective
Cap lift cam switch defective Replace the maintenance unit.
Main PCB defective
Foreign materials in the
head capping mechanism.
ASF encoder sensor
defective
ASF motor defective
Cap lift cam switch defective Replace the maintenance unit.
Main PCB defective
No head property data has
been entered
Main PCB defective
4-15
Solution
Replace the ASF motor ASSY.
Replace the main PCB.
Replace the ASF motor ASSY.
Replace the main PCB.
Remove foreign materials and
clean the mechanism.
Replace the ASF motor ASSY.
Replace the main PCB.
Remove foreign materials and
clean the mechanism.
Replace the ASF motor ASSY.
Replace the main PCB.
Enter the head property data.
Replace the main PCB.
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