Read Sharp MX-LCX1 (serv.man2) Service Manual online
MX-LCX1 OUTSIDE VIEW AND INTERNAL STRUCTURE 4 – 2
B. Sensors and Switches
No.
Signal
Name
Type
Function/operation
Activation condition
1
LDD
Tray lower limit sensor
Transmission
type
type
This sensor detects when the tray has
reached its lower limit.
reached its lower limit.
The signal becomes High level when the tray is
at its lower limit.
at its lower limit.
2
LRE
Lift motor encoder sensor
Transmission
type
type
This sensor detects when the lift motor
rotates.
rotates.
Pulse signal.
3
LCD
Tray insertion sensor
Transmission
type
type
This sensor detects when the tray is
inserted.
inserted.
The signal becomes High level when the tray is
inserted.
inserted.
4
LTOD
Main unit connection sensor
Transmission
type
type
This sensor detects when the paper feeder is
connected to the main unit.
connected to the main unit.
The signal becomes Low level when connected
to the main unit.
to the main unit.
5
LPFD
Transport sensor
Transmission
type
type
This sensor detects when paper is
transported.
transported.
The signal becomes Low level when paper is
transported (when paper exists).
transported (when paper exists).
6
LUD
Tray upper limit sensor
Transmission
type
type
This sensor detects when the tray has
reached its upper limit.
reached its upper limit.
The signal becomes High level when the tray is
at its upper limit (with the lift-up motor stopped).
at its upper limit (with the lift-up motor stopped).
7
LPED
Paper-on-tray sensor
Transmission
type
type
This sensor detects whether there is paper in
the tray.
the tray.
The signal becomes Low level when paper is in
the tray.
* When the tray is being lifted up and this
the tray.
* When the tray is being lifted up and this
signal is at Low level with the LRE signal not
exceeding 800 pulses, the paper feed
solenoid turns ON.
exceeding 800 pulses, the paper feed
solenoid turns ON.
8
LLSW
Upper limit switch
Microswitch
This limit switch is intended to prevent the
tray from overrunning the upper limit and
breaking the paper feed unit.
tray from overrunning the upper limit and
breaking the paper feed unit.
–
9
LDSW
Upper door latch switch
Microswitch
This switch detects when the upper door is
opened or closed.
opened or closed.
–
1
2
3
4
5
8
6
7
9
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