Date/Time Display Power Supply - Canon NP6251 Service Manual

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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
The power supply PCB is equipped with a fuse on its AC power input side and an
overcurrent protection circuit in its DC circuit.
If an overcurrent flows because of a short circuit in the line or the like, the protection
circuit turns on to turn off the output of the power supply unit. In such a case, disconnect
the copier's power plug, and remove the cause of activation before turning on the power.
The protection circuit may be reset by keeping the AC power supply of the power
supply unit off for about 30 sec before turning on the AC power supply.
Caution:
If an overcurrent flows in the output of the power supply unit, the protection circuit
will normally turn on before the AC input fuse melts. Keep in mind that repeatedly
turning on and off the AC power supply of the power supply unit with a short circuit
in the output of the power supply unit can melt the fuse of the AC input.
C. Date/Time Display Power Supply
The DC controller PCB is equipped with a lithium battery to back up the data when
the power plug is disconnected.
The lithium battery is designed to last for about five years with the power plug
disconnected.
The date/time indication stops when its life ends, and the indication starts once again
when the power plug is connected.
The lithium battery cannot be re-charged, requiring replacement (available as a
service part, which will last for five years starting at the point of use—it will not discharge
unless connected by its terminals).
Keep in mid that the back-up data will be lost when the battery comes to the end of
its life—enter the appropriate data after replacement.
!
Caution:
Replace the lithium battery only with the one listed in the Parts Catalog.
Use of another battery may present a risk of fire or explosion.
The battery may present a fire or chemical burn hazard if mistreated.
Do not recharge, disassemble or dispose of it in fire. Keep the battery out of reach
of children and discard any used battery promptly.
7-12
COPYRIGHT © 1997 CANON INC.
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

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