Brother DCP-8045D Посібник з експлуатації - Сторінка 4
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CHAPTER 3 THEORY OF OPERATION................................................. 3-1
1. E LECTRONICS ...................................................................................................... 3-1
1.1
1.2
1.3 Main
1.4 Engine
1.5 Pow er Supply.................................................................................................................. 3-11
2. M ECHANICS ........................................................................................................ 3-13
2.1
2.2 Sc anner Mechanism....................................................................................................... 3-14
2.3 Paper
2.4 Sens ors .......................................................................................................................... 3-17
fineline6
3.2.2 For Parallel Interface Cable Users
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(For Windows
95/98/98SE/Me/2000 Professional/XP) ...................................................2-13
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3.2.3 For Windows NT
Workstation Version 4.0 Users ............................................................2-18
3.2.4 For Network Interface Cable Users
®
(For Windows
95/98/98SE/Me/NT/2000 Professional/XP) ..............................................2-20
3.2.5 For USB Interface Cable Users (For Mac
3.2.6 For USB Interface Cable Users (For Mac
3.2.7 For Network Interface Cable Users (For Mac
3.2.8 For Network Interface Cable Users (For Mac
General Block Diagram .................................................................................................... 3-1
Main PCB Block Diagram ................................................................................................. 3-2
PCB ......................................................................................................................... 3-3
1.3.1 CPU .....................................................................................................................................3-3
1.3.2 USB .....................................................................................................................................3-3
1.3.3 IEEE 1284 ...........................................................................................................................3-4
1.3.4 RO M ....................................................................................................................................3-4
1.3.5 Flash ROM ..........................................................................................................................3-5
1.3.6 SDRAM ...............................................................................................................................3-5
1.3.7 O ptional RAM ......................................................................................................................3-6
1.3.8 EEPRO M.............................................................................................................................3-7
1.3.9 Reset circuit ........................................................................................................................3-7
1.3.10 Engine I/O ...........................................................................................................................3-7
1.3.11 Panel I/O .............................................................................................................................3-7
1.3.12 Video I/O .............................................................................................................................3-8
1.3.13 Scanner control ...................................................................................................................3-8
1.3.14 Power supply.......................................................................................................................3-9
PCB .................................................................................................................... 3-10
1.5.1 Low-voltage power supply.................................................................................................3-11
1.5.2 High-voltage power supply ................................................................................................3-12
Overview of Printing Mechanism .................................................................................... 3-13
Transfer ............................................................................................................... 3-15
2.3.1 Paper supply .....................................................................................................................3-15
2.3.2 Paper registration..............................................................................................................3-15
2.3.3 Paper eject ........................................................................................................................3-16
2.3.4 Duplex printing ..................................................................................................................3-16
2.4.1 Cov er sensors ...................................................................................................................3-17
2.4.2 T oner sensors ...................................................................................................................3-17
2.4.3 Cassette sensor / Paper empty sensor .............................................................................3-18
2.4.4 Paper eject sensor ............................................................................................................3-18
2.4.5 M P-PE sensor ...................................................................................................................3-19
2.4.6 Document cover sensor ....................................................................................................3-19
2.4.7 Document front sensor / Document rear sensor ...............................................................3-20
2.4.8 DX-sensor PCB ASSY.......................................................................................................3-20
MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN
®
OS 8.6 to 9.2 Users) ......................................2-23
®
OS X 10.1/10.2.1 or greater Users) ...............2-24
®
OS 8.6 to 9.2 Users) ................................2-25
®
OS X 10.1/10.2.1 or greater Users) .........2-26
iii
SERVICE MANUAL