Brother DCP6690CW Service Manual page 126

Error Code
Symptom
(Hex)
2E Not used.
2F Ink cartridge cover
opened.
3* Head/carriage unit travel
(except error.
3E)
Probable Cause
Ink cartridge cover sensor
(carbon switch) defective
Ink cartridge cover's tab
broken
Ink cartridge cover sensor
actuator unhooked
Rubber keypad defective
Control panel PCB defective Replace the control panel PCB.
Main PCB defective
Software malfunction
Any obstacles on the travel
path of the head/carriage unit
CR timing belt come off
CR encoder strip stained or
scratched
Carriage PCB defective
Head/carriage unit broken
Carriage motor defective
Main PCB defective
Power supply PCB defective Replace the power supply
Maintenance unit defective
4-14
Solution
Replace the control panel PCB.
Replace the ink cartridge
cover.
Set the ink cartridge cover
sensor actuator into place.
Replace the rubber keypad.
Replace the main PCB.
Open and close the scanner
cover.
Unplug and plug the AC cord.
Clean and lubricate the CR
guide rail and CR support
chassis.
Set the CR timing belt into
place.
Replace the CR encoder strip.
Replace the carriage PCB
ASSY.
Replace the head/carriage unit.
Replace the carriage motor.
Replace the main PCB.
PCB.
Replace the maintenance unit.
Confidential