Brother MFC-8220 Service Manual

CHAPTER 3 THEORY OF OPERATION
3-12
1.5.2 High-voltage power supply
The high-voltage power supply generates and outputs the voltages and currents for the
charging, development and transfer functions.
For the circuit diagram of the high-voltage power supply PCB, see APPENDIX 4.13 and 4.14
‘HIGH-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM’ in this manual.
Transfer Roller
Supply
Roller
Photosensitive
Drum
Development
Roller
Corona
Unit
Current
Regulator
Current
Regulator
Voltage
Regulator
Voltage
Regulator
T10
T402 Q405
T401 Q407
Voltage
Regulator
Z301 VR302
24VI
GND
VR401
Voltage
Regulator
VR301
Cleaning Brush
Fig. 3-18

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