Samsung MultiXpress X4 Series Service Manual page 124

2. Product Specifications and Description
5) Paper feeding system
No. Name
1 Pickup Roller (Cassette 3)
6 Pickup Roller (Cassette 4)
2 Forward Roller (Cassette 3)
7 Forward Roller (Cassette 4)
3 Retard Roller (Cassette 3)
8 Retard Roller (Cassette 4)
4 Feed Roller (Cassette 3)
9 Feed Roller (Cassette 4)
5 Idle Roller (Cassette 3)
10 Idle Roller (Cassette 4)
11 nP_Empty_DCF1
14 nP_Empty_DCF2
12 Limit_DCF1_IDCF
15 Limit_DCF2_DCF
13 Feed_DCF1_IDCF
16 Feed_DCF2_DCF
2-108
Description
This roller transports the paper from the cassette3 or 4.
This roller transports the paper from the pickup roller to the feed roller.
When two sheets of paper or more are transported from the pickup roller,
the torque limit load is bigger than the resistance between the sheets. As
the result, retard roller is stopped and the lower paper is not advanced any
further. When the last sheet is transported from the pick up roller, the
retard roller rotates following the feed roller.
This roller transports the paper from the forward roller to the basic
machine.
When the paper is passed at the feed roller, this roller makes paper
transporting be smooth.
This sensor detects the paper in the cassette3 or 4.
This sensor detects whether the paper is at pickup position or not.
This sensor detects the leading edge of the paper that is passing on the
feed roller.
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