2. Relationship between Scanner Sensor and SignalsTable 3-301COPYRIGHT © 1997 CANON INC. CANON NP6045 REV. 1 MAR. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 3 EXPOSURE SYSTEM3-7Scanner sensorScanner homeposition sensor(PS1)Originaldetectionleading edge 1sensor (PS3)SignalSCHPSCDP1Description• The scanner is at homeposition.• The scanner has reached homeposition.• The registration clutch turnsON.• The scanner is checked againstreference travel distance.• The brakes are applied to thescanner to slow down.ScannerForward Reverse