Brother MFC-9420CN - 2 ] Error Codes Shown in MACHINE ERROR X X Messages

Confidential
9-5
[ 2 ] Error codes shown in the "MACHINE ERROR X
X" messages
Error Code
(Hex)
Symptom Probable Cause Solution
Connector LCN does
not properly connected
Connect the connector
properly.
Laser unit defective Replace the laser unit
20 Laser power error
Engine controller board
defective
Replace the engine
controller board
Connector LCN does
not properly connected
Connect the connector
properly.
Laser unit defective Replace the laser unit
21 Beam detector error.
Engine controller board
defective
Replace the engine
controller board
22
NVRAM error
Main PCB defective
Replace the main PCB
Control error
Try the Power Switch
Off/On
23 Engine controller hardware
error
Engine controller board
defective
Replace the engine
controller board
Main motor defective
Replace the main motor 24 Process timing clock error.
Engine controller board
defective
Replace the Engine
controller board
Toner cartridge gear
defective
Replace the toner
cartridge.
Developer gear unit
defective
Replace developer gear
unit
Developer motor
defective
Replace the developer
motor
25 Developing motor error
Engine controller board
defective
Replace the engine
controller board.
Main motor defective
Replace the main motor 26 Main motor error.
Engine controller board
defective
Replace the engine
controller board.
Connector LCN does
not properly connected
Connect the connector
properly.
Laser unit defective Replace the laser unit
27
Scanner motor error
Engine controller board
defective
Replace the engine
controller board.