Ricoh MP 7503SP Field Service Manual page 1100

5. Detailed Descriptions
No.
4 Feed Roller
5 Separation Roller
6 Pick-up Roller
7 Tray 2 (Universal Tray)
8 Tray 3 (Universal Tray)
Here is a summary of the PFU mechanisms and features.
Paper Bank
• Paper Separation and Feed. The FRR system employs a maintenance free, nip release torque limiter
in the separation roller. Driven by the feed motor.
• Tray Movement. A lift motor raises and lowers the bottom plate. Pulling out a paper tray
disengages a coupling at the back of the tray and this lowers the bottom tray automatically.
• Paper Stack Height Detection. The lift motor can detect paper near-end and trigger a paper near-
end alert.
• Paper End Detection. A reflective photo-interrupter sensor detects paper end (paper out).
• Paper Size Detection. For Tray 1 (tandem tray) SP5959-001 must be set for the size of the paper
loaded in the tray. The universal trays have actuators connected to the side fences that will activate
switches in a 5-switch array, indicating the size of the loaded paper.
• Vertical Paper Feed. Each PFU has a grip roller that pulls the paper fed out of the tray by the feed
roller and sends it into the vertical paper path.
• Tray Set Mechanism. Each tray locks in place automatically when pushed into the machine.
• Anti-Condensation. Two paper bank heaters are provided as standard equipment with the
machine.
• Tandem Tray. The left tray of Tray 1 has a mechanism that can move a stack of paper into the right
tray.
Bypass Feed
• Bypass Feed Tray. The bypass feed tray which can be opened and closed against the right side of
the machine can hold up to 100 sheets of paper.
• Paper Separation and Feed and Separation. A maintenance free torque limiter (slip clutch) is
employed in an FRR (Feed and Reverse Roller) system. Driven by bypass feed motor and bypass
feed clutch.
• Paper End Detection. A drop feeler and photo-interrupt sensor comprise the paper end detection
mechanism.
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Part Name