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Confidential
9-5
[ 2 ] Error codes shown in the "MACHINE ERROR X X" message
s
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.
Summary of Contents for MFC-9420CN
Page 1: ...Confidential FACSIMILE EQUIPMENT SERVICE MANUAL MODELS MFC 9420CN ...
Page 16: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Page 22: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 33: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 48: ...Confidential 3 1 4 CBV DBV Fig 3 16 Y M C K Fig 3 17 ...
Page 69: ...Confidential 3 3 5 Fig 3 35 ...
Page 73: ...Confidential 3 3 9 3 Interface Circuit Printer side Fig 3 38 ...
Page 82: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Page 85: ...Confidential 4 2 Cover page sample End page sample Fig 4 1 ...
Page 86: ...Confidential CHAPTER 5 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 94: ...Confidential 5 5 5 1 1 AC Cord 1 Disconnect AC cord from the machine Fig 5 1 AC cord Machine ...
Page 175: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 203: ...Confidential CHAPTER 7 CLEANING ...
Page 205: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Page 213: ...8 6 Confidential Fig 8 2 Scanning Compensation Data List a b c d e f g h i j k l m n q ...
Page 224: ...8 17 Confidential Cover page sample End page sample Fig 8 8 ...
Page 255: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Page 279: ...Confidential 9 23 2 Image failure 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ...
Page 280: ...Confidential 9 24 15 a 15 b 16 17 18 19 20 21 22 23 24 25 Fig 9 1 ...
Page 325: ...App 1 5 Confidential 6 Transfer Unit X X X X X X 7 1 2 3 Location SERIAL NO YEAR MONTH DATE ...
Page 398: ...B Power Supply PCB 100V 127V Confidential ...