Power Supply; Power Supply Block Diagram - Canon imagePROGRAF iPF670 Service Manual

2.4.5 Power Supply

2.4.5.1 Power supply block diagram

Operation panel
POWER ON
The power supply converts AC voltages ranging from 100 V to 240 V from the AC inlet to DC voltages for driving the ICs, motor, and others.
The voltage generator circuits include the +26 V generation circuit for driving motors, fans, and sensors and a +21.5 V generator circuit for driving sensors, heads,
logic circuits, and others.
When the power is turned off, +26 V and +21.5 V are reduced to about 12 V and 9 V respectively (power save mode).
Power ON/OFF operation is controlled by the main controller PCB.
Main controller PCB

Power supply

DC power supply
control circuit
+5V/+3.3V
generation circuit
F-2-34
+26V
generation circuit
Transformer
+21.5V
generation circuit
Chapter 2
AC inlet
100V to 240V
Noize filter circuit
Rectifying circuit
0013-4333
2-45