10-83COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 10 TROUBLESHOOTINGSymbol NamePhotointerrupterToner sensorThermistorVolumeThermal fuseRef.PS1PS2PS3PS4PS5PS6PS7PS8PS9PS10Q561Q562Q563Q564ATSTH1TH2TH3TH4VR1FU1Descriptiondetects scanner home positiondetects lens home positiondetects blank shutter home positiondetects presence/absence of paper in cassettedetects presence/absence of paper in multifeederdetects paper in front of registration rollerdetects paper in separation assemblydetects paper in delivery assemblydetects beltdetects right door (open/closed)cassette size detection 1cassette size detection 2cassette size detection 3cassette size detection 4detects toner inside developing assemblyfixing heater temperature detection 1fixing heater temperature detection 2fluorescent lamp temperature detectionambient temperature detectionmultifeeder paper width detectionfixing heater overheating detectionTable 10-601PS