HP 4550 Service Manual - Page 311
Printer solenoids and clutches, Table 7-32, Sensor function and locations continued, Function
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Table 7-32 Sensor function and locations (continued) Name Function PS13 Waste toner sensor PS14 Density sensor PS301 OHT sensor (multipurpose tray PCB) PS3001 Paper feed detection sensor PS3101 Reversing unit paper sensor PS3102 Face-up sensor PS3103 Reversing unit stationary paper sensor PS3104 Duplex pick-up paper sensor PS3105 Side registration home position sensor CTLS Continuous toner level sensor CL2 CL3 CL1 CL4 SL2 SL1 Figure 7-23 Printer solenoids and clutches Table 7-33 Solenoid and clutch functions and locations Name Function SL1 Multipurpose tray pick-up solenoid SL2 Paper pick-up solenoid CL1 Registration clutch CL2 ITB unit separation clutch CL3 ITB cleaning roller separation clutch CL4 Secondary transfer roller separation clutch C7085-90921 Chapter 7 Troubleshooting 309