Sharp AR-LC5 (serv.man3) Service Manual ▷ View online
AR-LC5 OPERATIONAL DESCRIPTIONS 5 - 2
3. Paper feed operation
When the tray is stationary at the paper feed position (upper limit sen-
sor: LUD ON position) and there is paper on the tray, paper feed oper-
ation can be performed.
sor: LUD ON position) and there is paper on the tray, paper feed oper-
ation can be performed.
Paper feed operation is performed by the transport motor (LPFM), the
transport clutch (LTRC), the paper feed clutch (LPFC), and the paper
feed solenoid (LPFS) at the following timing.
transport clutch (LTRC), the paper feed clutch (LPFC), and the paper
feed solenoid (LPFS) at the following timing.
With the transport motor (LPFM) ON (rotating), when the transport
clutch (LTRC) is turned on, the transport roller rotates. When the paper
feed clutch (LPFC) is turned on under this state, the paper feed roller
and the take-up roller rotate. (With the transport clutch OFF, though
the paper feed clutch is turned on, the paper feed roller and the take-
up roller don't rotate.)
clutch (LTRC) is turned on, the transport roller rotates. When the paper
feed clutch (LPFC) is turned on under this state, the paper feed roller
and the take-up roller rotate. (With the transport clutch OFF, though
the paper feed clutch is turned on, the paper feed roller and the take-
up roller don't rotate.)
When the paper feed solenoid (LPFS) is turned on, the take-up roller is
pushed down to press paper.
pushed down to press paper.
4. Paper empty detection
When the tray moves up and stops at the paper feed position, and dur-
ing paper feed operation, paper empty in the tray is detected by the
paper empty sensor (LPED).
ing paper feed operation, paper empty in the tray is detected by the
paper empty sensor (LPED).
When paper empty in the tray is detected, the lift motor is turned on to
move the tray down, and the tray stops at the tray open/close allow
position (lower limit sensor ON position).
move the tray down, and the tray stops at the tray open/close allow
position (lower limit sensor ON position).
1
Paper feed roller clutch
2
Take-up roller
3
Paper feed roller
4
Paper feed solenoid
1
2
4
3
4
2
3
JOB start reception
JOB end reception
Paper feed start reception
LPFM
(Transport motor output)
LTRC
(Transport clutch)
LPFC
(Paper feed clutch)
LPFS
(Paper feed solenoid)
LPFD
(Transport sensor)
PPD2
(Machine sensor)
AR-LC5 DISASSEMBLY, ASSEMBLY 6 - 1
[6] DISASSEMBLY, ASSEMBLY
A. Transport section (Transport roller)
1) Remove the screw A, and remove the exteriors left front/rear B.
Remove the screw C and the connector D, and remove the trans-
port unit E.
port unit E.
2) Remove the E-ring etc. A, and remove the paper feed roller B.
Note *1:Be careful not to install the one way gear in the wrong direc-
tion.
B. Paper feed section
1) Remove the screw A, remove the top cover B, and remove the tray
C.
(1) Paper feed unit
1) Remove the connector A and the screw B, and remove the paper
feed unit C.
A
A
B
B
C
C
D
E
A
A
*1
B
A
B
C
A
B
C
B
B
AR-LC5 DISASSEMBLY, ASSEMBLY 6 - 2
(2) Paper feed roller, pick-up roller
1) Remove the resin ring A and the bearing B, and lift the pick-up
roller unit C.
Remove the resin ring D, pull out the shaft E, remove the pick-up
roller lever R, and remove the paper feed roller G and the pick-up
roller H.
roller lever R, and remove the paper feed roller G and the pick-up
roller H.
Note: (*1) When installing the paper feed roller, take care of the
installing direction.
(The rib of the paper feed roller must be set toward the rear
frame.)
(The rib of the paper feed roller must be set toward the rear
frame.)
(*2) When installing the paper feed clutch, check that the clutch
stopper is caught by the pawl.
(3) Reverse roller
1) Remove the resin ring A. Pull out the reverse roller unit B, and
remove the reverse roller C.
C. Control PWB
1) Remove the connector A, and remove the control PWB B.
A
C
B
2
1
D
F
G
E
H
[ a ]
The assembly method
A
B
C
B
A
AR-LC5 DISASSEMBLY, ASSEMBLY 6 - 3
D. Paper feed/transport motor
1) Remove the connector A and the screw B. Remove the motor C.
E. Lift-up motor
1) Remove the connector A and the screw B. Remove the screw C
and remove the lift-up motor D.
F. Clutch
1) Remove the4 screw A and remove the CL plate B.
Remove the connector C and remove the clutch D.
A
B
C
A
A
B
D
C
C
A
B
C
D
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