Filter
Top Products
3–102
OPERATIONS AND TIMING
COPYRIGHT
©
1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
B. Power Supply Circuitry
The machine’s power supply unit uses a single
main transformer (T101) to supply DC power.
AC power is supplied to the DC power supply
when the power switch (SW1) and the door switch
are turned ON.
Since DC power to the DC controller circuit will
be cut off in this condition, the machine is equipped
with a lithium battery (BAT301) to back up the RAM
(Q308) in the DC controller circuit.
Caution:
The AC power supply unit remains supplied
with voltage even when the power is OFF.
Reference:
The tolerances of the DC voltage are as follows:
• +30 V +10%, -5%
• +24 V ±5%
• +5V ±5%
However, the above stand when the AC input
inaccuracy is ±10%.
Figure 3-502
DS1 PWSW
FU1
T101
DC controller
BAT
301
Power supply unit
Q308
DC Power
supply
unit
+30V
+24V
+5V