First Sheet - Sharp AR-FN8 Service Manual

CHAPTER 2 FINISHER UNIT BASIC OPERATION
2.

First Sheet

The finisher controller PCB stops the delivery motor (M2) as soon as the trailing edge of the
first sheet has moved past feed roller 2. Then it rotates the delivery motor clockwise to switch the
gear drive to the swing motor (M7), causing the swing guide to move up. When the swing guide
open sensor (PI18) finds the swing guide at the up position, the swing motor stops, maintaining the
swing guide at the up position.
When the swing guide has moved up, the feed belts of feed roller 2 move the sheet to the
stapling tray. (The first sheet is fed to the stapling tray while the swing guide is moving up.) The
presence of paper on the stapling tray is detected by the stapling tray sensor (PI4).
The finisher controller PCB drives the alignment motor (M3) when the stapling tray sensor has
detected paper to put sheets in order. The alignment plate is kept waiting in advance at a point 10
mm behind the trailing edge of the paper.
The swing guide is kept waiting at the up position until the last sheet is output onto the stapling
tray.
2-26
Swing guide
1st sheet
Delivery roller
Tray 1/2
Stapling tray
Figure 2-225
Feed roller 2
Knurled belts
Stapler