Ricoh M C250FW, Field Service Manual

Page: 270 / 324

7.Detailed Descriptions
258
ADF (MF Model Only)
Overview
No. Part name No. Part name
1 ADF pick-up roller 7 Original set sensor (S11)
2 Original set sensor feeler 8 Original exit roller
3 ADF feed roller 9 ADF exposure glass *At scanner unit side
4 ADF separation pad 10 Back ADF exposure glass
5 Transport roller 11 Back CIS
6 Back registration sensor (S13) 12 Front registration sensor (S12)
Mechanism
Paper Path
The original feed unit, comprising the pick-up roller [2] and feed roller [3], waits in a raised position to
allow the original to be loaded easily.
When you load the original, the feeler of the original set sensor [1] is lifted, and the machine detects
that the original has been loaded.
When you press the [B&W Start] key or [Color Start] key, the ADF motor drives the pick-up roller and
feed roller, and the original feed unit descends to pick up the original.
During the continuous scanning of multiple sheets, the original feed unit stays down to feed the next
original further through the original feed path while preventing double feeding with the media stopper. If
the back registration sensor [5] or the front registration sensor [9] does not detect the original within a
certain period after original feeding starts, the machine determines that the original has jammed.
In the case of duplex scanning, the original fed by the transport roller [4], is scanned by the back CIS [7]
located under the back ADF exposure glass [6], passes the transport roller [8], has its front scanned by
the CIS at the ADF exposure glass [10], and then is finally delivered to the output tray by the original
exit roller [11].