Brother MFC-9420CN - Page 262

Confidential
9-6
Error Code
(Hex)
Symptom Probable Cause Solution
28 Charge HV unit error HV Power Supply
defective
Replace the HV Power
Supply PCB
29 LVPS error. LV Power Supply
defective
Replace the LV Power
Supply PCB
Fuser thermistor
defective
Replace the fuser unit
2A Fuser thermistor error
Engine controller board
defective
Replace the engine
controller board.
Breakdown of Heater
On/Off Circuit
Replace the LV Power
Supply PCB
2B
Fuser heater error.
Breakdown of Temp
Control Circuit
Replace the engine
controller board
Contact Failure of
Harness Connector
Confirm the connection of
Harness Connector
2C
Fuser temperature low error at
warming-up.
Low Input Voltage Connect the printer with
the rated voltage
source.
2D
Fuser temperature low error Low Input Voltage Connect the printer with
the rated voltage
source.
Breakdown of Heater
On/Off Circuit
Replace the LV Power
Supply PCB
2E
Fuser temperature high error
Breakdown of Temp
Control Circuit
Replace the engine
controller board
Breakdown of Heater
On/Off Circuit
Replace the LV Power
Supply PCB
2F
Fuser ACOFF error.
Breakdown of Temp
Control Circuit
Replace the engine
controller board
Erase lamp defective Replace the erase lamp 30
Erase LED error
Engine controller board
defective
Replace the engine
controller board.
Power supply fan
defective
Replace the power supply
fan
31
Power supply fan error
Engine controller board
defective
Replace the engine
controller board.
Exit fan defective
Replace the exit fan 32
Exit fan error
Engine controller board
defective
Replace the engine
controller board.
Laser unit fan ASSY
defective
Replace the Laser unit fan
ASSY
33
Laser unit fan ASSY error
Engine controller board
defective
Replace the engine
controller board.