Figure 1-53 HCI signal flow Table 1-16 HCI electrical components Component Abbreviation Component name Motor M3301 HCI right cassette pickup motor M3302 HCI right cassette lifter motor M3303 HCI left cassette lifter motor M3304 HCI left cassette pickup motor Solenoid SL3301 HCI right cassette pickup solenoid SL3302 HCI left cassette pickup solenoid Photointerrupter PS3101 HCI right cassette media stack surface 2 sensor PS3102 HCI right cassette media stack surface 1 sensor PS3103 HCI right cassette media out sensor PS3201 HCI left cassette media stack surface 2 sensor PS3202 HCI left cassette media stack surface 1 sensor PS3203 HCI left cassette media out sensor PS3301 HCI media feed sensor PS3302 HCI right cassette media feed sensor PS3303 HCI right cassette media size sensor PS3304 HCI left cassette media size sensor PS3305 HCI left cassette media feed sensor PS3306 HCI long edge feed guide open detection sensor Switch SW3301 HCI right door open detection switch SW3302 HCI right cassette open detection switch SW3303 HCI left cassette open detection switch 68 Chapter 1 Theory of operation ENWW DC controller +24V 3,500-sheet paper deck Motor Solenoid HCI controller Photointerrupter Switch