Roland SOLJET Pro III XC-540 Service Notes page 209

5 Supplemental Information
PINCH ROLLER SENSOR
It detects the positions of Pinch Roller.
It detects whether the Media Clamp is set or not.
5
INK CARTRIDGE SENSOR
It detects whether the Ink Cartridge is installed
or not.
INK CARTRIDGE IC SENSOR
It detects the ink type and the remaining amount
of the ink.
THERMISTOR (HEAD BOARD)
It takes the temperature around the Head Board.
INK EMPTY SENSOR
It detects whether the Ink Cartridge is empty or not.
5-4
CROP MARK SENSOR
It detects the Crop Mark.