Panel Sensor Pcb; Power Supply; Low-Voltage Power Supply - Brother HL-820 Service Manual

1.4

Panel Sensor PCB

The following parts are on the panel sensor.
• Control Panel ........... 1 Switch, 4 lamps
• Connector ................ Low-voltage, high-voltage, solenoid, main motor, toner sensor,
• Registration sensor
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 (+5V and +24V), which are converted from the AC line.
The regulated output and the production code of each power supply vary depending on
the printer model as listed below;
Model
HL-820/1020/1040
HL-1050
laser, polygon motor, connector for main PCB
Regulated Output
+5V / 0.6 A
+24V / 2.0 A
+5V / 1.2A
+24V / 2.0A
Lightning
Fuse
Surge
Absorber
Line
Rectifier
Filter
24V
Regulation
Circuit
5V
Regulation
Circuit
Fig. 2-27
II-24
Production Code
100V: MPW1547
200V: MPW1447
100V: MPW1550
200V: MPW1450
(Heater)
Thermal
Fuse
Heater
Circuit
Feedback
Oscillator
(Panel Sensor Circuit)
24V
5V
Lamp