Canon NP6621 Service Handbook

Also see for NP6621: Service manual Service manual

6–3ARRANGEMENT AND FUNCTIONS OF THE ELECTRICAL PARTSSymbol NamePhotointerrupterToner sensorThermistorVolumeThermal fuseNotationPS1PS2PS3PS4PS5PS6PS7PS8PS10PS11PS12PS13PS14PS15PS16PS19PS23PS21ATSTH1TH2VR1FU1DescriptionScanner home position detectionLens home position detectionBlank shutter home position detectionPaper in cassette 1 detectionPaper in multifeeder detectionRegistration roller detectionPaper for separation detectionPaper for delivery detectionRight door open/closed detectionCopyboard cover open/closed detectionPaper at vertical path roller 2 detectionPaper in cassette 2 detectionPaper at duplexing unit outlet detectionPaper at duplexing unit inlet detectionPaper at vertical path roller detectionDuplexing unit horizontal registration roller detectionOriginal size detection 1Original size detection 2Developing assembly toner sensorFixing heater thermal detection 1Fixing heater thermal detection 2Multifeeder paper width detectionFixing heater overheating detectionTable 6-600PS