Confidential
9-12
Error Code
(Hex)
Symptom Probable
Cause
Solution
Hook of the front open
switch on the front
cover broken
Replace the front cover.
A1
Front cover (scanner unit)
opened.
Front open switch
broken
Replace the front open
switch.
Document jam
Remove the jammed
document.
Document rear sensor
actuator caught on the
surrounding parts
Correct the surrounding
parts on which the
actuator caught.
A2
Document length exceeding
the scan limitation.
During scanning, 90 cm or
longer of a document is
detected.
During document feeding or
ejecting, 400 cm or longer of a
document is detected.
Document rear sensor
broken
Replace the document
rear sensor.
Document jam
Remove the jammed
document.
Document rear sensor
actuator caught on the
surrounding parts
Correct the surrounding
parts on which the
actuator caught.
A3
The document rear sensor does
not come ON during document
pull-in operation.
Document rear sensor
broken
Replace the document
rear sensor.
A4
50% or more faulty of white
level data. (Not used.)
---
---
A5
FAX scanning failure.
(1st time)
CIS defective
White-level reference
film stained in the
scanner cover
Replace the scanner cover
(scanner unit).
A6
FAX scanning failure. (retry)
Main PCB defective
Replace the main PCB.
A7-AA Not
used.
CIS defective.
Replace the scanner cover
(scanner unit).
AB
CIS Resolution failure.
Main PCB defective
Replace the main PCB.
AC
Less than 50% faulty of white
level data. (Not used.)
--- ---
AD-AE Not
used.
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 ...