Service manual

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 9 EXTERNAL/AUXILIARY MECHANISM
9-5
C. Energy save function control
1. Overview
This unit is equipped with an Energy Save function (referred to hereafter as ESS),
which serves to reduce the energy consumption while the unit is in standby mode.
When the main unit has been in stand-by mode for the specified length of time, it
switches over to the ESS function.
The settings for the activation times of the ESS function and the settings for the
stand-by time can be registered in the user mode.
Stand-by time: from 3 to 30 minutes (factory setting: 3 minutes)
2. Control
The ESS is controlled by the image processor PCB.
The main unit stays in the stand-by mode until the ESS activation time specified in
the user mode has elapsed. Then, the ESS control signal is emitted by the ESS con-
troller assembly, which is located on the image processor PCB.
The DC controller PCB, the control panel and the electrical loads are controlled by
this signal.
■ Power consumption during stand-by mode
Normal stand-by mode: 20W ± 10%
When the ESS is activated: approximately 14W
Figure 9-202
Cassette feeder
and
each electrical
load
DC
controller
PCB
Electrical loads
ADF relay
PCB
Control
panel
DC power supply PCB
Image
processor
PCB
ESS
controller
assembly
DC power supply
DC power supply
DC power
supply
DC power
supply
DC power
supply
ESS
controller signal
ESS
controller signal
DC power
supply
ESS
control signal
IC
IC
IC
IC
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