Brother MFC-8220 Service Manual

MFC-8220
SERVICE MANUAL
iii
3.2.2 For Parallel Interface Cable Users
(For Windows
®
95/98/98SE/Me/2000 Professional/XP)...................................................2-18
3.2.3 For Windows NT
®
Workstation Version 4.0 Users............................................................2-23
3.2.4 For Optional NC-9100h Network Interface Users
(For Windows
®
95/98/98SE/Me/NT/2000 Professional/XP)..............................................2-25
3.2.5 For USB Interface Cable Users (For Mac
®
OS 8.6 to 9.2 Users)......................................2-28
3.2.6 For USB Interface Cable Users (For Mac OS
®
X 10.1/10.2.1 or greater Users)...............2-29
3.2.7 For Optional NC-9100h Network Interface Users (For Mac OS
®
8.6 to 9.2 Users)...........2-30
3.2.8 For Optional NC-9100h Network Interface Users
(For Mac OS
®
X 10.1/10.2.1 or greater Users).................................................................2-31
CHAPTER 3 THEORY OF OPERATION................................................. 3-1
1. ELECTRONICS ...................................................................................................... 3-1
1.1 General Block Diagram ....................................................................................................3-1
1.2 Main PCB Block Diagram.................................................................................................3-2
1.3 Main PCB .........................................................................................................................3-3
1.3.1 CPU.....................................................................................................................................3-3
1.3.2 USB.....................................................................................................................................3-4
1.3.3 IEEE 1284...........................................................................................................................3-4
1.3.4 ROM....................................................................................................................................3-5
1.3.5 Flash ROM..........................................................................................................................3-6
1.3.6 SDRAM ...............................................................................................................................3-6
1.3.7 Optional RAM......................................................................................................................3-7
1.3.8 EEPROM.............................................................................................................................3-7
1.3.9 Reset circuit ........................................................................................................................3-8
1.3.10 Engine I/O ...........................................................................................................................3-8
1.3.11 Panel I/O .............................................................................................................................3-8
1.3.12 Video I/O .............................................................................................................................3-8
1.3.13 Scanner control...................................................................................................................3-9
1.3.14 Power supply.......................................................................................................................3-9
1.4 Engine PCB....................................................................................................................3-10
1.5 Power Supply..................................................................................................................3-11
1.5.1 Low-voltage power supply.................................................................................................3-11
1.5.2 High-voltage power supply................................................................................................3-12
2. MECHANICS ........................................................................................................ 3-13
2.1 Overview of Printing Mechanism....................................................................................3-13
2.2 Scanner Mechanism.......................................................................................................3-14
2.2.1 Document feeding and ejecting mechanism .....................................................................3-14
2.2.2 Scanner.............................................................................................................................3-14
2.3 Paper Transfer ...............................................................................................................3-15
2.3.1 Paper supply .....................................................................................................................3-15
2.3.2 Paper registration..............................................................................................................3-15
2.3.3 Paper eject........................................................................................................................3-16
2.4 Sensors ..........................................................................................................................3-17
2.4.1 Document cover sensors ..................................................................................................3-17
2.4.2 Toner sensors ...................................................................................................................3-17
2.4.3 Cassette sensor / Paper empty sensor.............................................................................3-18
2.4.4 Paper eject sensor ............................................................................................................3-18
2.4.5 Document front sensor / Document rear sensor ...............................................................3-19
2.4.6 Regist sensor ....................................................................................................................3-19

Brother MFC-8220 Specifications

General

Type	all in one
Tray Capacity	250
Automatic Document Feeder Capacity	30 sheets
Paper Size	letter, legal, a4, b5, a5, b6, a6, exe
Paper Handling	up to 250 sheets
Mono Print Speed	21 pages per minute
Print Resolution Mono	up to 2400 x 600
Maximum Number of Pages Per Month	up to 20, 000
Scanner Type	sheetfed
Scan Resolution	up to 300 x 600
Copier Resolution Mono	up to 600
Fax Function	yes
Cartridges	n/a
Number Of Cartridges	2
Internal Memory	yes
Network	not applicable
Connectivity	parallel, usb 2.0
OS Compatibility	pc: windows 95, 98, 98se, me, nt workstation 4.0, 2000 professional or xp, mac: os 8.6 to 9.2, os x 10.1, 10.2.1 to 10.3 or later, available usb 2.0 or parallel port
Mobile Devices Connection	no

Weight and Dimensions

Height	13.2 inches
Width	17 inches
Net Weight	25.6 pounds