176 Theory of operation ENWW
• PS7: Fuser delivery paper sensor
• PS8: Face-down delivery unit paper sensor
• PS9: Reversed paper sensor (P850HP only)
• PS10: Duplexing feed delivery paper sensor (P850HP only)
• M1: Feed motor
•M2: Delivery motor
• M3: Drum motor
• SL1: Tray 1 (multipurpose tray) pickup solenoid
• SL2: Tray 2 (cassette) pickup solenoid
• SL4: Secondary transfer roller engaging solenoid
• SL5: Duplexing feed solenoid (3700 printer only)
• CL1: Registration clutch
The pickup/feed system can be divided into the following three blocks.
1 Pickup/feed unit: each pickup source to fuser inlet
2 Fuser/delivery unit: fuser to delivery source
3 Duplexing feed unit (3700 printer only): fuser delivery source to registration roller inlet
Figure 5-57 Pickup/feed system blocks
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