MX-FN15, MX-FN16. Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 123

When the leading edge of a sheet has moved past the inlet flapper, the intermediate feed roller

and the crescent roller start to move the sheet forward.

The intermediate feed roller is normally not in contact with the path bed. When the leading

edge of a sheet reaches the intermediate feed roller contact section, the Finisher Paper Transport
Solenoid (FPTS) causes the roller to come into contact with the path bed so as to move the sheet.
The contact is broken as soon as the leading edge of the sheet reaches the paper positioning plate.
This series of operations is executed each time a sheet arrives.

When the leading edge of the first sheet reaches the paper positioning plate, the Finisher Saddle

Paper Alignment Tray Paper Detector (FSATPD) turns ON. The arrival of the second and subse-
quent sheets will not be checked since the first sheet will still be over the sensor.

The crescent roller keeps rotating while sheets are being output, butting the leading edge of

each sheet against the paper positioning plate, and ultimately, keeping the leading edge of the stack
in order.

The Finisher Saddle Paper Alignment Motor (FSPAM) drives the alignment plates for each

sheet so as to put both left and right edges of the sheet in order.

1) The solenoid turns ON while paper is being moved so that the feed plate comes into contact.

FPTS

Finisher Paper 

Transport Solenoid

ON

Finisher Paper 

Transport Motor4

Intermediate feed roller

FPTM4