Ricoh D3G1 Manual de serviço de campo - Página 12

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1.Detailed Descriptions

Mechanism

The tray unit and paper feed transport unit are integrated. The pick-up roller, feed roller and reverse

roller are common with the main frame's paper feed unit. Both paper feed and paper separation

mechanisms use the same RF paper feed system.

In order to feed the paper at regular intervals, there is a paper feed sensor between the pick-up roller

and the feed roller, and this sensor is used to adjust the paper feed timing.

The paper feed motor (M2) turns ON, and feeds the first sheet of paper.

To prevent the next sheet from being transported, the pick-up solenoid (SOL1) turns ON just before

the trailing edge of the first sheet passes through the pick-up roller, and the pick-up roller leaves

the paper surface.

Just before the trailing edge of the first sheet leaves the paper feed roller, the paper feed motor

(M2) turns OFF.

However, at this time, if the paper feed sensor (S1) does not detect paper (the second sheet is not

transported to the paper feed sensor position), the paper feed motor (M2) does not turn OFF. Pre-

feed is performed as follows:

The pick-up solenoid (SOL1) turns OFF, and the second sheet of paper is transported to the

paper feed sensor position.

When the trailing edge of the second sheet passes the feed roller, the paper feed motor (M2)

is turned OFF. The pick-up solenoid (SOL1) remains OFF.

Just before the trailing edge of the first sheet passes the feed roller, the pick-up solenoid (SOL1)

turns OFF. The pick-up roller is brought into contact with the paper surface.

If paper is pre-fed, the pick-up solenoid (SOL1) will remain OFF, and this operation will not

performed.

When the first sheet is transported a specified distance by the downstream transport roller, the

paper feed motor (M2) turns ON to feed the second sheet.