Read Sharp MX-LC12 (serv.man10) Service Manual online
MX-LC12 OPERATIONAL DESCRIPTION 5 – 1
MX-LC12
Service Manual
[5] OPERATIONAL DESCRIPTION
1. Lift operation
When the main unit is turned ON, if the tray is at the lower limit
position (lower limit sensor: LDD ON position), the lift motor is
turned ON to lift the tray.
When the paper presence/empty sensor (LPED) is turned ON
within 800 pulses of the encoder signal from start of lifting up the
tray, the lift motor is turned OFF to stop the tray, and the paper feed
solenoid is turned ON to move down the pickup roller. After that,
the lift motor is turned ON to lift the tray. The tray is stopped when
the upper limit sensor (LUD) is turned ON.
position (lower limit sensor: LDD ON position), the lift motor is
turned ON to lift the tray.
When the paper presence/empty sensor (LPED) is turned ON
within 800 pulses of the encoder signal from start of lifting up the
tray, the lift motor is turned OFF to stop the tray, and the paper feed
solenoid is turned ON to move down the pickup roller. After that,
the lift motor is turned ON to lift the tray. The tray is stopped when
the upper limit sensor (LUD) is turned ON.
If the paper presence/empty sensor (LPED) is not turned on within
800 pulses, the paper feed solenoid is turned ON with the lift motor
ON to move down the pickup roller. The lift motor is stopped at the
upper limit sensor (LUD) ON position, and the paper feed solenoid
is turned OFF.
When the machine power is turned on, if the tray is on the paper
feed position, lifting is not performed.
When the tray is pulled out, it moves down by its own weight.
800 pulses, the paper feed solenoid is turned ON with the lift motor
ON to move down the pickup roller. The lift motor is stopped at the
upper limit sensor (LUD) ON position, and the paper feed solenoid
is turned OFF.
When the machine power is turned on, if the tray is on the paper
feed position, lifting is not performed.
When the tray is pulled out, it moves down by its own weight.
Lifting up operation (When LPED is turned ON within 800 pulses of encoder.)
Lifting up operation (When LPED is not turned ON within 800 pulses of encoder.)
2. Paper feed operation
When the tray is stationary at the paper feed position (upper limit
sensor: LUD ON position) and there is paper on the tray, paper
feed operation 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.
sensor: LUD ON position) and there is paper on the tray, paper
feed operation 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.
When the transport clutch (LTRC) is turned ON with the transport
motor (LRFM) ON (rotating), 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. When the paper feed sole-
noid (LPFS) is turned ON, the take-up roller is pushed down to
press paper.
motor (LRFM) ON (rotating), 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. When the paper feed sole-
noid (LPFS) is turned ON, the take-up roller is pushed down to
press paper.
LCC paper feed time chart
LLM
(Lift motor output)
LLD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPFS
(Solenoid)
Within 800 pulses
200 msec
LRE
(Encoder signal)
LLM
(Lift motor output)
LLD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPFS
(Solenoid)
LRE
(Encoder signal)
Within 800 pulses
LPFM
(Transport motor)
LPFD
(Transport sensor)
TRC
(Main unit
synchronous signal)
LTRC
(Transport clutch)
LPFC
(Paper feed clutch)
LPFS
(Paper feed solenoid)
Paper feed start
Clearance-between-
papers control timer
PIC drop timer
PIC drop timer
PIC drop timer
PIC drop timer
Clearance-between-
papers control timer
Clearance-between-
papers control timer
Clearance-between-
papers control timer
Resist stop
Resist stop
Resist stop
Resist stop
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Preliminary
paper feed start
First sheet
Preliminary
paper feed start
Second sheet
Preliminary
paper feed start
Third sheet
Preliminary
paper feed start
Fourth sheet
Preliminary
paper feed start
Fifth sheet
Preliminary paper
feed complete
Paper feed start
feed complete
Paper feed start
Preliminary paper
feed complete
Paper feed start
feed complete
Paper feed start
Preliminary paper
feed complete
Paper feed start
feed complete
Paper feed start
Preliminary paper
feed complete
feed complete
Preliminary paper
feed complete
feed complete
Click on the first or last page to see other MX-LC12 (serv.man10) service manuals if exist.