Brother MFC-8220 Service Manual

TABLE OF CONTENTS
iv
2.5 Drum Unit ....................................................................................................................... 3-20
2.5.1 Photosensitive drum.......................................................................................................... 3-20
2.5.2 Primary charger................................................................................................................. 3-20
2.5.3 Transfer roller.................................................................................................................... 3-20
2.5.4 Cleaner ............................................................................................................................. 3-20
2.6 Toner Cartridge .............................................................................................................. 3-20
2.7 Print Process.................................................................................................................. 3-20
2.7.1 Charging ........................................................................................................................... 3-20
2.7.2 Exposure stage ................................................................................................................. 3-21
2.7.3 Developing ........................................................................................................................ 3-22
2.7.4 Transfer............................................................................................................................. 3-22
2.7.5 Fixing stage....................................................................................................................... 3-23
CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY ............................. 4-1
1. SAFETY PRECAUTIONS..........................................................................................4-1
2. DISASSEMBLY FLOW..............................................................................................4-2
3. DISASSEMBLY PROCEDURE .................................................................................4-3
3.1 Power Cord ...................................................................................................................... 4-3
3.2 Drum Unit ......................................................................................................................... 4-3
3.3 Paper Tray ....................................................................................................................... 4-4
3.4 Rear Cover C ................................................................................................................. 4-13
3.5 Access Cover / Battery ASSY........................................................................................ 4-14
3.6 Control Panel ASSY....................................................................................................... 4-16
3.7 Document Scanner ........................................................................................................ 4-21
3.8 Outer Chute.................................................................................................................... 4-26
3.9 Rear Cover L/R .............................................................................................................. 4-27
3.10 Side Cover L/R............................................................................................................... 4-28
3.11 Top Cover ASSY............................................................................................................ 4-29
3.12 Front Cover ASSY.......................................................................................................... 4-34
3.13 NCU ............................................................................................................................... 4-35
3.14 Fixing Unit ...................................................................................................................... 4-36
3.15 Laser Unit....................................................................................................................... 4-45
3.16 Main PCB ASSY ............................................................................................................ 4-46
3.17 Base Plate / LV Insulation Sheet ................................................................................... 4-48
3.18 Engine PCB ASSY......................................................................................................... 4-49
3.19 High-voltage PS PCB ASSY .......................................................................................... 4-50
3.20 Low-voltage PS PCB ASSY........................................................................................... 4-50
3.21 Paper Feeder ................................................................................................................. 4-52
3.22 Frame L / Drive Unit ....................................................................................................... 4-59
3.23 Thermistor ASSY ........................................................................................................... 4-63
3.24 Fan Motor 60 Unit LV / Fan Motor 60 Unit..................................................................... 4-63
3.25 Frame R ......................................................................................................................... 4-64
4. PACKING ................................................................................................................4-66
5. GUIDELINES FOR LEAD FREE SOLDER..............................................................4-67
6. SCREW TORQUE LIST ..........................................................................................4-70
7. LUBRICATION ........................................................................................................4-71
8. HARNESS ROUTING..............................................................................................4-73

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