Power Supply; Outline - Canon GP200 Service Manual

VIII. POWER SUPPLY
A. Outline
The machine's DC power is generated by the
composite power supply PCB. The composite
power supply PCB serves as the DC power sup-
ply and also as a lamp unit and a high-voltage
transformer unit.
Figure 3-801 is a block diagram of the entire
composite power supply PCB, and Figure 3-801
gives an outline of the DC power supply.
Composite Power Supply Output
Output voltage
24VR
24VU
+7V
+15V
–12V
5.1V
+5V
Table 3-801
COPYRIGHT © 1996 CANON INC.
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Output voltage
24V±5%
24V±10%
8.75V±26%
15V±5%
–12V±5%
5.1V±3%
5V±%
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3. OPERATIONS AND TIMING
2. Power Supply with the Control
Panel Power Supply OFF (SLEEP)
The state in which the control panel power
switch if OFF is called SLEEP state, and it may be
either power saving mode (SLEEP 2) or quick
start mode (SLEEP 1) as selected by the power
saving switch.
a. Power Saving Mode (SLEEP 2)
In power saving mode, power is supplied only
to the CPU on the composite power supply PCB.
( Power to the system power supply circuit need-
ed when the Printer Board or the like is installed
will not be cut.)
In power saving mode, FAX reception is
enabled. When a communication arrives, the CI
signal is generated within the NCU. The CI signal
is sent to the CPU on the composite power sup-
ply PCB through the FAX Motherboard, thereby
turning ON the composite power supply PCB to
start supply power to each PCB.
In power saving mode, however, printer func-
tions are not enabled. (For this reason, software is
programmed so that a switch to power saving
mode is not allowed if the Printer Board is
installed or a FAX function is set to start at a spe-
cific time.)
b. Quick Start Mode (SLEEP 1)
In quick start mode, the image processor PCB
and the DC controller PCB (white areas in Figure
3-802) are supplied with power. In this mode, FAX
and printer functions are enabled.
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