46. The Add Toner indicator fails to turn ON.47. The Add Toner message fails to turn OFF.COPYRIGHT © 1997 CANON INC. CANON NP6045 REV. 1 MAR. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 10 TROUBLESHOOTING10-102CauseToner sensor(hopperassembly), DCcontroller PCBDC controllerPCB, ControlpanelChecksIs toner in the hopper assembly?Select 'PC002' in service mode( ). Move the toner aroundthe toner sensor (TS1) so that thesensor is exposed. At this time, isthe indication for bit 10 on themessage display '0', indicating theabsence of toner?Open the upper cover of thedeveloping assembly. Is the tonerlevel sensor covered by toner?]2]Step123YES/NOYESNOYESYESActionGo to step 3.1. Replace TS1.2. Replace the DCcontroller PCB.1. Replace the DCcontrol.2. Replace the controlpanel.End.CauseTonerToner sensor(TS1)DC controllerPCB, ControlpanelChecksIs toner present at the rear of thehopper?Select 'PC002' in service mode( ). At this time, is theindication for bit 10 on themessage display '0', indicating theabsence of toner?]2]Step12YES/NONOYESNOActionThe amount of tonerinside the hopper is toolittle. Supply toner.Replace the tonersensor (TS1) in thehopper assembly.1. Replace the DCcontroller PCB.2. Replace the controlpanel.
