Canon iR2270 Series, Service Manual

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Chapter 10
10-9
10.4 Power Supply System
10.4.1 Power Supply
10.4.1.1 Route of Power Inside the Printer Unit
0008-0541
iR2270 / iR2870 / iR3570 / iR4570
The machine's DC power is controlled by the printer unit power supply PCB.
The following shows the functions of the individual power supply PCBs used or accessories and the distribution of
power:
T-10-6
Name Description Remarks
Printer unit power
supply PCB Generates DC power (24 V, 13 V); supplies
DC power to the controller power supply
PCB and cassette pedestal.
Accessories power
supply PCB Supplies power to the side paper deck,
buffer path, and finisher.
Main switch Turns on/off the power to the AC driver
PCB.
Door switch Turns on/off 24 VU1 to the DC controller
PCB.
Leakage breaker Cuts power in the event of an error.
Environment heater
switch PCB Turns on/off power to the cassette heater,
printer unit heater, and deck heater. Optional
High-voltage power
supply PCB Generate various high voltage.
AC driver PCB Supplies AC power to the printer unit power
supply PCB, accessories power supply
PCB, Supplies AC power to all-night power
supply PCB; drives the fixing system.
Controller power
supply PCB Supplies DC power to the 3-way unit, fax
board, controller, HVT and DC controller
PCB; generates DC power (13V, 5V, 3.3V).
Generates DC power (5V,3.3V).