3–104OPERATIONS AND TIMINGCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)D. Protection Mechanisms forthe Power Supply CircuitThe composite power supply PCB isequipped with an overcurrent detection circuit;its protection mechanism turns ON to stop theoutput if a short circuit occurs because of afault in the loads.When the output is stopped, open the frontdoor to turn OFF the door switch, correct theload, and turn ON the door switch and thepower switch to return the output.Caution:Be sure to disconnect the connector (J4) beforeperforming the above work.Do not repeat resetting short-circuits; otherwise,the built-in fuse (F2) can blow.Note:Replace the lithium battery only with the onelisted in the Parts Catalog. Use of differentbattery may present a risk of fire or explosion.The battery may present a fire or chemical burnhazard if mistreated. Do not recharge, disas-semble, or dispose of it in fire.Keep the battery out of reach of children anddiscard any used battery promptly.
