Maintenance Cartridge Relay Pcb; Maintenance Cartridge Relay Pcb Components; Power Supply; Power Supply Block Diagram - Canon iPF720 Service Manual

Chapter 2

2.4.5 Maintenance Cartridge Relay PCB

2.4.5.1 Maintenance cartridge relay PCB components

a) EEPROM (IC1)
The 128-KB EEPROM stores all information written in the EEPROM on the main controller PCB.

2.4.6 Power Supply

2.4.6.1 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 +32 V generation circuit for driving motors, fans, and the +5.1V generator circuit for driving sensors, logic circuits.
When in the power saving mode, the power supply cut outs the +32 V and the +5.1 V.
Power ON/OFF operation is controlled by the main controller PCB. When the upper cover is open, the power supply cut outs only the +32V power to the carriage.
2-36
IC 1
F-2-29
Main controller PCB

Power supply

DC power supply
control circuit
+5V/+3.3V
generation circuit
F-2-30
+32V
generation circuit
Transformer
+5.1V
generation circuit
AC inlet
100V to 240V
Noize filter circuit
Rectifying circuit
0013-6972
0013-6974