Citizen CT-S281 Mode D'emploi page 15

● ERROR LED
Lights or blinks when paper is empty or in case of a failure.
The interval length of blinking shows the type of error.
● PAPER LED
Lights when there is no paper or the paper is low with the optional PNE sensor.
● Bluetooth Status LED (Only BT model and BD model are located inside the
back of the main body)
Bluetooth communication status is indicated by blinking.
Rear Connectors
Type RS
Sensor adjuster
cover
Serial interface
connector
● Power connector
Connects to the cable from AC adapter.
● USB Interface connector
Connects to the USB interface cable.
● Serial interface connector
Connects to the serial interface cable.
● Sensor adjuster cover
When adjusting the Paper sensor, remove this cover.
● Drawer kick connector (BD model only)
Cable from the drawer is connected.
Type UB/BT
Power connector
Sensor adjuster
cover
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Bluetooth Status LED
Power connector
Drawer kick connector
USB Interface connector
Type BD