Low Voltage Power Circuit - Canon LBP6000 Series Service Manual

Chapter 2
Noise filter
Protection
circuit

2.6.1.1.2 Low voltage power circuit

LBP6000 / LBP6000B
This circuit is to convert the AC power that is input by the power receptacle to the DC power and supply it to each load.
AC power is supplied to the low voltage circuit when the power switch (SW1) is turned ON. Then, AC power is converted to the DC power; +24V, +5V or +3.3V
that is required for the host machine in this circuit.
The following is the block diagram of low voltage circuit and the DC power supply route.
2-28
FU101
Noise filter
FU201
(110-127V model only)
Frequency detection circuit
(220-240V model only)
+24V
generation circuit
+24V
output switch circuit
+5V
generation circuit
+3.3V
generation circuit
+3.3V
output switch circuit
Hornet Plus/ Hornet Base/ Wasp only
Engine controller
Low-voltage power supply
FREQSNS
+24V
PWSV
+24V
24VOFF
+5V
+3.3V
+3.3V
+3.3VOFF
F-2-37
Fixing High-voltage
control power supply
+24V
SW501
CPU
+3.3V
SW502
0025-1182