13. E26114. E710, E711, E712, E71715. E803COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-69CHAPTER 10 TROUBLESHOOTINGChecksTurn off and on the power supply.Is the problem corrected?Replace the composite powersupply PCB. Is the problemcorrected?CausePower supplyfrequencyCompositepower supplyPCBDC controllerPCBStep12ResultsYESYESNOActionEnd.• If the problem occursfrequently, advise theuser to obtain afrequency stabilizer.End.Replace the DCcontroller PCB.ChecksTurn off and on the power switch.CauseDC controllerPCBStep1ResultsYESNOActionEnd.Replace the DCcontroller PCB.ChecksTurn off and on the power switch.Is the problem corrected?Replace the DC controller PCB. Isthe problem corrected?CauseMalfunctionDC controllerPCBCompositepower supplyPCBStep12ResultsYESYESNOActionEnd.End.Replace the compositepower supply PCB.
