Power Supply; Low-Voltage Power Supply - Brother MFC-8220 Service Manual

1.5

Power Supply

1.5.1

Low-voltage power supply

The power supply uses a switching regulation system to generate the regulated DC power
(+3.3V, +8V [non regulated] and +24V), which are converted from the AC line.
The regulated output is listed below;
Regulated Output
+3.3V / 1.5A
+8V / 0.7A
+24V / 2.9A
For the circuit diagram of the low-voltage power supply PCB, see
VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM'
Fuse
Lightning
Surge
Absorber
Line
Filter
Heater
Circuit
Fuse
Rectifier
24V
Regulation
Circuit
3.3V
Regulation
Circuit
Fig. 3-17
3-11
APPENDIX 4.12 'LOW-
in this manual.
(Heater)
Thermal
Fuse
Feedback
Oscillator
(Engin Circuit / Main Circuit)
24V
8V
3.3V
MFC-8220
SERVICE MANUAL
Lamp