MX-FN19, MX-FN20, MX-PN12. All Sections - Sharp Copying Equipment Specification (repair manual). Page 127

MX-FN19  OPERATIONAL DESCRIPTION  6 – 26

The saddle stitch unit identifies any of the following conditions as a jam, and sends the jam signal to the host machine. In response, the host
machine may stop copying operation and indicate the presence of a jam on its control panel.
When all the doors are closed after the user has removed the jam, the saddle stitch unit checks whether the vertical path paper sensor
(FSVPPD) has detected the presence of paper. If the sensor has detected paper, the unit will identify the condition as being faulty jam removal
and send the jam signal to the host machine once again.

FSPIND

FS1PD

FS2PD

FS3PD

FSVPPD

FSPDD

FSPPPD

FSLGTD

FSLGHPD

No.

Name of sensor

FSPDD

Delivery sensor

FSVPPD

Vertical path paper sensor

FS1PD

No.1 paper sensor

FS2PD

No.2 paper sensor

FS3PD

No.3 paper sensor

FSPIND

Saddle inlet sensor

Inlet delay

FSPIND

The saddle inlet sensor (FSPIND) does not detect paper sheet even if 
predetermined time (distance) has passed after receiving saddle delivery request 
signal from the finisher.

1793

Inlet stationary

FSPIND

The sheet does not move past from the saddle inlet sensor (FSPIND) even if 
predetermined number of sheets have been delivered by the feeder motor (FSFM) 
after the saddle inlet sensor (FSPIND) detects the top edge of sheet.

17A3

Feed delay

FS1PD

The NO.1 paper sensor (FS1PD) does not detect paper sheet even if 
predetermined time (distance) has passed after the saddle inlet sensor (FSPIND) 
detects the top edge of sheet.

1791

Feed stationary

FS1PD, FS2PD, FS3PD

The sheet does not move past from the No.1 paper sensor (FS1PD), No.2 paper 
sensor (FS2PD), and the No.3 paper sensor (FS3PD) even if predetermined 
number of sheets have been delivered by the feed motor (FSFM) after the 
No.1paper sensor (FS1PD) detects the top edge of sheet.

17A1

Delivery delay

FSPDD

The paper sensor (FSPDD) does not detect paper even if predetermined number of 
sheet stacks have been delivered by the paper folding motor (FSFOM) after paper 
is pushed by the paper pushing plate.

1792

Delivery stationary

FSPDD, FSVPPD

The paper stack does not move past from the delivery sensor (FSPDD) even if 
predetermined number of stacks have been delivered by the paper folding motor 
(FSFOM) after the delivery sensor (FSPDD) detects the top edge of sheet. The 
paper stack does not move past from the vertical path paper sensor (FSVPPD) 
even if predetermined number of stacks have been delivered by the paper folding 
motor (FSFOM) after the delivery sensor (FSPDD) detects the stacks.

17A2

Stitcher stapler

FSSHP2, FSSHP1

When the stitcher motor (FSFSTM/FSRSTM) is rotating clockwise, the stitcher 
home position sensor (FSSHP2/FSSHP1) does not turn ON within 0.4 secs after it 
has turned OFF. In addition, the sensor turns ON within 0.4 secs after the motor 
has been rotated counterclockwise.

1786

Power-On

FSPPPD, FSPDD, 
FSVPPD, FS1PD, 
FS2PD, FS3PD, FSPIND

One of the sensors on the paper sensor PCB (No.1 paper sensor (FS1PD), No.2 
paper sensor (FS2PD), No.3 paper sensor (FS3PD), vertical path paper sensor 
(FSVPPD), delivery sensor (FSPDD), paper positioning plate paper sensor 
(FSPPPD), saddle inlet sensor (FSPIND) detects a sheet when power is supplied.

1787

Door open

FSINDD, FFDD

The inlet cover sensor (FSINDD) detects opening of the cover during operation. 
The front cover open/close sensor (FFDD) detects opening of the cover while paper 
is on the stapling tray.

1788