AR-CF1 (serv.man4). Saddle stitch unit basic operation - Sharp Copying Equipment Service Manual (repair manual). Page 5

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3-4
CHAPTER 3   SADDLE STITCH UNIT BASIC OPERATION
2.
Inputs to the Saddle Stitch Controller PCB
PI8S
J105-3
-1
-2
-1
-3
-2
-3
-1
-2
J6-1
+5V
When paper is present at the 
paper positioning plate, “1”.
PPOSPAR
-3
-2
J301A
J225
J425
J301
J201
PI9S
J124-3
-1
-2
J10-6
+5V
When the inlet cover is 
closed, “1”.
 
INLTCVR
-8
-7
PI11S
J525-3
-1
-2
-2
-4
-3
-3
-1
-2
J9-1
+5V
When paper is present in 
the delivery sensor unit, “1”.
 
DELV
-3
-2
J425
J325
-2
-4
-3
-3
-1
-2
J225
J125
PI12S
J126-3
-1
-2
J9-4
+5V
When the flag of the crescent 
roller is at the sensor, “1”.
FDRLHP
-6
-5
PI13S
J127-3
-1
-2
J9-7
+5V
When the guide is at home 
position, “1”.
GIDHP
-9
-8
PI14S
J128-3
-1
-2
J9-10
+5V
When the paper pushing plate 
is at home position, “1”.
LUNGEHP
-12
-11
PI15S
J129-3
-1
-2
J9-13
+5V
When the paper pushing plate 
is at the leading edge, “1”.
LUNGETOP
-15
-14
PI16S
J131-3
-1
-2
J13-1
+5V
When the stitch unit is 
housed, “0”.
STPLHP*
-3
-2
PI17S
J132-3
-1
-2
-1
-3
-2
-4
-2
-3
J13-4
+5V
When paper is present in the 
vertical path, “1”.
When the paper folding roller 
is at home position, “0”.
VPJM
-6
-5
J308A
J308
J208
PI21S
J130-3
-2
-1
J18-1
+5V
PAFLDHP*
-3
-2
Saddle stitch controller PCB
Paper positioning 
plate paper sensor
Inlet cover sensor
Delivery sensor
Crescent roller 
phase sensor
Guide home 
position sensor
Paper pushing 
plate home 
position sensor
Paper pushing 
plate top position 
sensor
Stitch unit IN 
sensor
Vertical path 
paper sensor
Paper folding 
home position 
sensor
Figure 3-104

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