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Confidential
3 - 1
3.1 OVERVIEW
PARARELL I/F
(CDCC I/F)
128kbit
EEPROM
144pin SO DIMM
(MAX 512MB)
ENGINE
CDCC GA
DC POWER
SUPPLY
Color CIS
Network IC
(LAN91C115)
LAN
V34 MODEM IC
8MB
FLASH
USB
32MB SDRAM
NiMH
battery
32MB SDRAM
NCU PCB
EXTEL
SPEAKER
LINE
Analog SW
AMP
AMP
ADF DOCUMENT FRONT SENSOR
PANEL CPU
(or PANEL GA)
LCD
KEY Matrix
MAIN ASIC
2MB SDRAM
CPU
(2.0)
ADF DOCUMENT REAR SENSOR
(3cell:3.6V)
Back Light LED
(DFX336)
MAIN PCB
PANEL PCB
SENSOR PCB
FB MOTOR
ADF MOTOR
16MB ROM
Image
processing
ASIC2
Image
processing
ASIC1
Fig. 3-1
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 ...