MX-FNX8. MX-FNX8 - Sharp Copying Equipment Service Manual (repair manual). Page 14

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MX-FNX8  DETAILS  4 – 3
B. ELECTRICAL COMPONENT SUMMARY
Here is a general summary of all the electrical components.
Motors
No.
Name
Description
M1
ENT_M
Entrance Motor
Controls the rollers that feed paper 
into the booklet finisher.
M2
EXIT_M
Upper Transport 
Motor
Controls the rollers that feed paper 
out of the booklet finisher.
M3
DRRLVI_M
Clamp Roller 
Retraction Motor
Drives a large cam that alternately 
clamps and unclamps the clamp 
retraction roller, the idle roller of the 
clamp roller pair. When these rollers 
are clamped, they are part of the 
paper feed path and feed the stack 
toward the bottom fence of the fold 
unit. When the idle roller is retracted, 
the stacks falls a very short distance 
(3 mm) onto the fold unit bottom 
fence below. These rollers remain 
unclamped while the bottom fence 
positions the stack for folding and 
while the stack is folded by the fold 
rollers.
M4
FINENT
Feed Out Belt 
Motor
Drives the feed out belt that moves 
the stapled stacks out of the stapling 
tray after stapling.
M5
FLDPLT_M
Fold Plate Motor
Drives the fold plate that pushes the 
center of the stack into the nip of the 
fold rollers to start the fold.
M6
FLDROL_M
Fold Roller Motor 
Rotates forward and drives the fold 
rollers that fold the stack and feed it 
out of the fold unit, reverses to feed 
the fold once more into the fold unit, 
and then rotates forward again to 
feed the fold out of the fold unit.
M7
TALFNC_M
Fold Unit Bottom 
Fence Lift Motor
Raises the bottom fence and stops 
when the center of the vertical stack 
is opposite the edge of the horizontal 
fold blade. The distance for raising 
the blade is prescribed as one-half 
the size of the paper selected for the 
job. For large paper, (A3, B4) the 
bottom fence first lowers the stack 
10 mm below the fold position, and 
then raises it to the fold position.
M8
JOG_M
Jogger Fence 
Motor
Drives the jogger fences in the 
stapling tray to jog both sides of the 
stack before stapling.
M9
LOTRS_M
Lower Transport 
Motor
Drives paper feed rollers forward 
and reverse in the stack tray for the 
switchback, and drives the other 
rollers in the lower transport area.
M10
PORLDR_M
Positioning Roller 
Motor
Drives the positioning roller in the 
stapling tray.
M11
BDJCTG_M
Stack Junction Gate 
Motor
Controls the junction gate at the 
entrance of the booklet finisher
PCBs
No.
Name
Description
PCB1
Booklet Stapler 
Board
A separate board that controls 
booklet finishing.
PCB2
Main Board
The main board that controls the 
finisher.
Sensors
No.
Name
Description
S1
SDLFLLF
Booklet Output Tray 
Full Sensor - Front
This front sensor is the higher 
sensor of the booklet tray full sensor 
pair. Two actuators are attached to 
the actuator arm that touches the 
top of stapled and folded booklets as 
they feed out. The on/off 
combinations of the two sensors are 
used to detect when the tray is full 
and stop the job. (The booklet tray is 
stationary. At tray full, the job halts 
until booklets are removed from the 
booklet tray.)
S2
SDLFLLR
Booklet Output Tray 
Full Sensor - Rear
This rear sensor is the lower sensor 
of the booklet tray full sensor pair. 
Two actuators are attached to the 
actuator arm that touches the top of 
stapled and folded booklets as they 
feed out. The on/off combinations of 
the two sensors are used to detect 
when the tray is full and stop the job. 
(The booklet tray is stationary. At 
tray full, the job halts until booklets 
are removed from the booklet tray.)
S3
CLPROLHP
Clamp Roller HP 
Sensor
Controls the movement of the clamp 
retraction roller (the idle roller of the 
clamp roller pair).
S4
FINENT
Finisher Entrance 
Sensor
Provides two functions: (1) Detects 
paper entering the finisher from the 
copier, and (2) Signals a jam if it 
detects paper at the entrance when 
the copier is switched on.
S5
FLDBTMHP
Fold Bottom Fence 
HP Sensor
Controls the movement of the 
bottom fence in the folding unit using 
pulse counts based on the size of 
the paper selected for the job to 
position the stack correctly for 
feeding.
S6
FLDCMHP
Fold Plate Cam HP 
Sensor
Along with the fold plate HP sensor 
(S29), this sensor controls the 
movement of the fold plate. The 
actuator mounted on the end of the 
roller that drives the folder plate 
forward and back makes three full 
rotations, i.e. the actuator passes 
the sensor gap twice and stops on 
the 3rd rotation and reverses. This 
accounts for the left and right 
movement of fold plate.
S7
FLDPLTHP
Fold Plate HP 
Sensor
Along with the fold plate cam HP 
sensor (S30) this sensor controls the 
movement of the fold plate. The fold 
plate has arrived at the home 
position when the edge of the plate 
enters the gap of this sensor.
S8
FLDUNENT
Fold Unit Entrance 
Sensor
Detects 1) the leading edge of the 
stack during booklet stapling, and 2) 
also used to signal an alarm if a 
paper is detected at the entrance of 
the fold unit when the copier is 
turned on.
S9
FLDUNEXT
Fold Unit Exit 
Sensor
1) Detects the folded edge of the 
stack as it feeds out from the nip of 
the fold rollers, stops the rollers, and 
reverses them so the fold feeds 
back into the nip, 2) when the folded 
booklet finally emerges from the nip 
of the fold rollers, detects the leading 
and trailing edge of the booklet to 
make sure that it feeds out correctly.
S10
JOGHPS
Jogger Fence HP 
Sensor
Detects the home position of the 
jogger fences. When the actuator on 
the jogger fence interrupts this 
sensor, the jogger fence is in its 
home position and the jogger fence 
motor (M15) stops.
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