HP Color LaserJet 9500 Service Manual - Page 80

Sensors Multifunction finisher PI17 PI16 PI15 MS2 PI4 MS1 MS3 MS4 PI23 PI22 PI13 Figure 39. Sensors-multifunction finisher (1 of 5) Number Description PI4 Aligning plate home-position sensor (front) PI13 Booklet bin-full sensor PI15 Shift upper limit sensor PI16 Shift lower limit sensor PI17 Shift motor clock sensor PI22 PI23 Front door sensor Upper cover sensor MS1 MS2 Front door switch Interlock switch MS3 Stapler safety-area switch 1 MS4 Stapler safety-area switch 2 Function Location Detects the aligning plate (front) at the home position Whole unit Detects the paper-full condition in the booklet bin Whole unit Detects the delivery tray at the upper-limit Whole unit position Detects the delivery tray at the lower-limit Whole unit position Detects the clock signal from the shift motor Whole unit Detects the front door opening or closing Whole unit Detects the upper cover opening or closing Whole unit Detects the front door opening or closing Switch only Detects whether or not the multifunction Switch only finisher is attached to a printer Detects the stack height of job that is being stapled Switch only Detects the stack height of job that is being stapled Switch only 78 Theory of operation ENWW