Canon NP6621 Service Handbook

Also see for NP6621: Service manual Service manual

4–2TROUBLESHOOTING MALFUNCTIONSCauseThermistorFixingheaterdriver PCBDC control-ler PCBStep12Yes/NoYESYESNORemedyReplace the upper fixingassembly.End.Replace the DC controller.ChecksDisconnect the connector (J4) of thefixing heater, and press the powerswitch while holding down the servicemode switch. (This will reset E001;about 2 sec later, the power switch willturn OFF automatically.)Let the fixing assembly cool, anddisconnect J47. Is the resistancebetween J47-1 and -2 about 0 ý? Isthe resistance between J47-3 and -4about 0 ý?Replace the fixing heater driver. Is theproblem corrected?2 E001CauseWiringDC control-ler PCBFixingheater driverStep123Yes/NoYESNOYESNORemedySee “E000.”Correct it.End.Replace the fixing heaterdriver PCB.ChecksDisconnect the connector J4 of thefixing heater, and press the powerswitch while holding down the servicemode switch. (This will reset the errorcode; about 2 sec later, the powerswitch will be turned OFF automati-cally.)Is ‘E000’ indicated when the powerswitch is pressed?Are the wiring and connector connec-tions from connectors J324A-1, 2, 5, 6to J47 normal?Replace the DC controller PCB. Is theproblem corrected?3 E002, E003