2 ] Error Codes Shown In "Machine Error X X" Messages - Brother MFC-9420CN Service Manual

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