Ricoh D391, Service Manual

Page: 453 / 490

Paper Pickup and Feed
The tray lift motor (M4) turns on and lifts Tray A until the paper feed sensor (S4 (INS)) detects the top of
the paper stack and stops the motor with the pickup roller [1] resting on top of the stack.
The feed mechanism is the standard FRR design. The tray feed motor (M1 (INS)) turns on and rotates both
the pickup roller [1] and the feed roller [2]. The pickup roller pulls out the paper tray and the feed roller
feeds it out of the tray. The separation roller [3] is equipped with a torque limiter to prevent double-feeding.
Skew Correction at the Registration Roller
The registration sensor (S5 (INS)) [1] goes ON just as the paper reaches the registration roller [2] and
switches the tray feed motor off. This brief pause in paper feed causes the paper to buckle slightly against
the registration roller and corrects skew. .
The normal pause for skew correction may not be long enough to correct skew of thick paper or coated
paper. When either type of paper is selected for the job, the registration clutch (CL1 (INS)) is switched on
Inserter-C1 (D391)
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