Roland VersaUV LEJ-640 Service Notes page 293

ENCODER MODULE
It detects the coordinates in the carriage moving
direction, and also generates the print signal.
HEAD UP/DOWN SENSOR
It detects the position of the Head
Height Lever.
THERMISTOR
It takes the temperature around the Head.
The leftmost head is used for the measurement.
UV LAMP SENSOR
It detects the limit position of the UV Lamp
movement.
WIPER SENSOR
It detects the limit position of the Wiper
movement.
(Front side of the machine)
PAPER SIDE SENSOR
It detects width of the media.
5-4
Revised 2
MEDIA THICKNESS
CHECKING SENSOR
It detects the media thickness
is not greater than the entered
value.
Revised 2
(Rear side of the machine)