Brother MFC-9420CN - Page 264

Confidential
9-8
Error Code
(Hex)
Symptom Probable Cause Solution
Toner cartridge
defective
Replace the toner
cartridge
Toner retract solenoid
assy defective
Replace the toner retract
solenoid assy
3B Black switching solenoid error
Engine controller board
defective
Replace the engine
controller board.
Transfer unit
defective
Replace the transfer unit
Marker sensor defective Replace the marker sensor
3C Transfer belt error
Engine controller board
defective
Replace the engine
controller board.
Transfer roller solenoid
defective
Replace the transfer roller
solenoid
3D
Transfer roller solenoid error.
Engine controller board
defective
Replace the engine
controller board.
Transfer belt cleaning
solenoid defective
Replace the transfer belt
cleaning solenoid
3E
Transfer belt cleaning solenoid
error.
Engine controller board
defective
Replace the engine
controller board.
Fuser unit clutch
defective
Replace the fuser unit
clutch
3F
Fuser unit clutch error.
Engine controller board
defective
Replace the engine
controller board.
Belt marker sensor
defective
Replace the belt marker
sensor
40 Belt marker sense error
Engine controller board
defective
Replace the engine
controller board.
LV Power Supply PCB
defective
Replace the LV Power
Supply PCB
41 HVU connection error
Engine controller board
defective
Replace the engine
controller board.
Toner sensor defective Replace the toner sensor
42
43
Toner empty sensor
connection error 1, 2
Engine controller board
defective
Replace the engine
controller board.
Lower feeder unit
connector damaged
Replace the lower feeder
unit
44 Lower feeder unit connection
error
Engine controller board
defective
Replace the engine
controller board.