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CHAPTER 2 FUNCTIONS & OPERATION
V. POWER SUPPLY
1. Power Supply
The machine uses an AC adapter for its
power supply. Its rated input voltage is
100-240 VAC, 50/60 Hz and whose output
is 24 VDC. Use the AC adapter bundled
with this machine. The power output from
the AC adapter is input to the control PCB.
In case of excess voltage or current
applied to the AC adapter output, the safety
system cuts the power. In this case, unplug
the AC plug. After removing the cause, plug
it back.
The power switch for the machine is
mounted on the operation PCB. When the
switch is turned on, a DC/DC converter
activates to generate each of the DC
voltages and supply power to each of the
components.
When no documents have been fed or
there has been no communication via this
USB I/F for an extended period of time, the
machine enters the sleep mode (Energy
Star mode). When the machine is in the
sleep mode, the electrical circuits enter a
sleeping state. However, the CPU does not
enter a sleeping state. This machine
automatically returns from the sleep mode
when it receives communication from a
computer or when a key on the operation
panel is pressed.
Furthermore, on the user setting screen,
user can set the power to be turned OFF if
no operations are performed for a long
period of time (4 hours).
Power
switch
Control PCB
DC/DC
converter
24 V
24 V
Each DC
voltage
AC adapter
Figure 2-501
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CANON ELECTRONICS INC. 2011 CANON DR-M140 FIRST EDITION
2-17