Power Supply - Canon NP-1010 Service Manual

V. POWER SUPPLY
A. Power
Supply
The DC power supply is supplied with AC power as soon as the door switch and POWER switch
are turned ON; the DC power supply, in turn, generates 24 VDC and 5 VDC.
B. Protection Mechanism for Power Circuit
The DC power supply circuit is of a switching regulation type; and, if an over-current flows be-
cause of a short circuit (problems in loads). the protection mechanism is activated and stops the
output.
When the output stops, it can be started by turning the POWER switch OFF, correcting the prob-
lem in the load, and turning the POWER switch ON once again. Repeated short-circuiting of the
load(s) and repeated resetting can cause the fuse built inside the DC power supply to melt.
Power supply/AC driver circuit PCS
~_________________________--------~
1
I
1
I
/
I
i
DWSl SW1
AC
,
I
components
ynlo'"'
I
DC
power
SUPPlY
Figure 3-45
3-32
COPVRICHT 019811 CANON INC.
CANON HP-1010 AN.0 DEC. 1988 PAINTED IN JAMN [IMPRIME till JIPONI