AR-CF1 (serv.man4). Saddle stitch unit basic operation - Sharp Copying Equipment Service Manual (repair manual). Page 41

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CHAPTER 3   SADDLE STITCH UNIT BASIC OPERATION
b.
B4 Stack
(PI18S)
(PI19S)
(PI18S)
(PI19S)
No.1 paper sensor
No.1 paper sensor
No.2 paper sensor
No.2 paper sensor
Feed motor
Feed motor
T: feeding of (paper length x 1.5) mm
T: feeding of (paper length x 1.5) mm
Normal
Normal
Jam
Jam
Load stops
Note: The diagram shows two sensors 
checking for jams. Single detection, 
however, uses only one sensor.
Figure 3-604
c.
A4-R/LT-R Stack
(PI18S)
(PI19S)
(PI20S)
(PI18S)
(PI19S)
Note:  The diagram shows three sensors checking 
for jams. Single detection, however, uses 
only one sensor.
No.1 paper sensor
No.1 paper sensor
No.2 paper sensor
No.3 paper sensor
(PI20S)
No.3 paper sensor
No.2 paper sensor
Feed motor
Feed motor
Jam
Jam
Jam
T: feeding of (paper length x 1.5) mm
T: feeding of (paper length x 1.5) mm
Load stops
Normal
Normal
Normal
Figure 3-605
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