Meanings of LED Indications

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The LED lights on the printer indicate printer status and communication status.

If an error or trouble occurs, check to see which LED light stays on or off, or is flashing.

For explanation of the LED lights, see Panel LED.

The LED lights displayed on the printer differ depending on the interface installed on the printer.

Interface

Printer status

: Ignore the LED lights shown with this icon in the table.

Panel LED	Printer status and troubleshooting	Error code
	Normal status. The printer is ready to print. If the printer does not print, check the communication status LED lights.	-
	The printer is in the initializing process to start after power-on. Wait until the printer goes into the normal mode.	-
	The roll paper cover is open. Check whether the roll paper cover is tightly closed.	3DA11
	An auto cutter error is detected. Check inside the printer for a jammed paper or foreign objects. When the Roll Paper Jams	3CA21
	Temperature of the thermal head is high. Due to the high temperature, the printer stopped printing. Printing starts again automatically when the thermal head temperature falls.	2AA23
	Cannot detect black marks.	2BD31 3BD41
	The printer has run out of roll paper. Check whether the roll paper is correctly installed and any roll paper remains. Installing or Replacing the Roll Paper	-
	Paper is remaining at the paper exit area. Remove the paper.	-
	Turn the printer off, and after 10 seconds, turn it back on. If the Error LED turns on again even after turning the power back on, a malfunction may have occurred. Contact your qualified service personnel.	A9999 AKA41 AKA42
Only for Printers with USB connector (USB-A – Device Charging)/(Type-A) The Error LED flashes during five seconds after a device is connected, and then turns off.	An unsupported device is connected to the USB-A – Device Charging and/or the USB Type-A connector. Communication with the device is not possible but the device can be charged.	-

*About the error codes
The error codes can be checked on TM-L100 Utility. When contacting qualified service personnel for help, inform the personnel of the error code to troubleshoot the problem quickly.

Ethernet Connection Status (When connected with an Ethernet cable)

: Ignore the LED lights shown with this icon in the table.

Panel LED	Printer status
	The printer is connected to Ethernet.
	The printer is not connected to Ethernet (IP address has not been acquired).
	The printer is starting the network firmware.
	The printer is not connected to Ethernet nor Wi-Fi.

Wi-Fi Connection Status (When the wireless LAN unit is connected)

: Ignore the LED lights shown with this icon in the table.

Panel LED	Printer status
	The printer is connected to Wi-Fi.
	The printer is not connected to Wi-Fi (IP address has not been acquired).
	The printer is starting the network firmware.
	The printer is not connected to the Wi-Fi network.

Bluetooth Communication Status (only for Bluetooth capable models)

: Ignore the LED lights shown with this icon in the table.

Panel LED	Printer status
	The printer is connected via Bluetooth.
	The printer is not connected via Bluetooth.
	The printer is waiting to be paired with another device.