Power Supply - Canon CLC5000 Service Manual

CHAPTER 2 NEW FUNCTIONS

7.4 Power Supply

The machine's DC power is supplied to its loads directly or by way of a respective con-
troller PCB from three power supply PCBs: DC power supply PCB 1 (upper), DC power
supply PCB 1 (lower), and DC power supply PCB 2.
The DC power supply PCB 1 supplies DC voltage in sync with the power switch, while
the DC power supply PCB 2 supplies DC voltage independently of the power switch.
F02-704-01 shows how AC power is supplied to each power supply PCB, while F02-704-
02 shows the destinations of the voltage and the outputs of each power supply PCB.
The machine is equipped with a power save switch (SW8) so that the cassette heater and
the like may be supplied with power "at all times" or "only when the power switch is on."
The heaters that are subject the settings of the switch are shown in F02-704-01.
The cassette heater may be operated in ways that are selected in service mode, and it is
turned on according to the selected settings if the power save switch is on even when the
power switch is off.
When the machine's power switch is turned off, the power to the loads other than the cir-
cuits around the CPU on the DC controller PCB or the reader controller PCB is cut off; to
back up the data in RAMs on these PCBs, the machine is equipped with lithium batteries.
Power switch (SW2)
ON
ON
OFF
OF
2-154
Power save switch
(SW8)
1(ON)
0(OFF)
1(ON)
0(OFF)
T02-704-01
COPYRIGHT © 2001 CANON INC.
Cassette 1 heater
Cassette 2 heater
Paper deck heater
ON
ON
ON
OFF
2000 2000 2000 2000
C drum heater
M drum heater
Y drum heater
K drum heater
ON
ON
ON
OFF
CANON CLC5000 REV.0 JAN. 2001