Part Names and Functions

This section explains the names and functions of parts that are related to the basic operations of the main unit.

Front of main unit

Inside of main unit

Back of main unit

Front of main unit
Indicates the printer status.
Power LED
When the power is turned on, this LED lights up or flashes according to the printer status.
Information LED
This LED lights up red or orange to indicate the timing of cleaning and parts replacement. This LED also flashes light blue when there is data waiting for printing.
Network LED
This LED lights up green according to the network connection status.
Bluetooth LED <MCL32CBI>
This LED lights up blue according to the Bluetooth connection status.

LED Display

Cover opening lever
Pull this lever to open the printer cover when setting the paper roll.
Paper exit/Tear bar
The printed paper is ejected from here.
Paper can be cut manually using the tear bar in an emergency where the cutter cannot be used.
Power button
Use this button to turn power ON/OFF and to restart the printer.
Turn On/Off Power
Multi-Function button
Press this button to feed paper.
Also, use this button for One Touch Label and Self-Printing.
Use One Touch Label
Inside of main unit
Printer cover
Opens/Closes when setting the paper roll.
Paper Setup
Paper guide shaft
Insert the shaft core of the paper roll here.
Paper Setup
Paper guide lever
Pinch this lever and move the paper guide right and left when adjusting the width of the paper guide.
Paper Setup
Paper guide (R)
Paper guide (L)
Roll position lever
Detects that the set paper roll has come off from the paper guide shaft and has fallen.
Paper Setup
PE/BM sensor
Detects the end of the paper or a black mark on the back side of paper.
When using label paper with black marks, move this sensor to an appropriate position according to the utility guide. In other cases, align this sensor with the center mark.
GAP sensor
Detects border lines on the die cut label paper.
Hold print sensor
Detects that a printed label is remaining at the paper exit.
Protection parts
Protection parts for transport of the printer.
This is attached near the paper exit. Remove and dispose it before using the printer.
Back of main unit
RESET switch
Initializes the communication settings of the main unit.
Initialize Communication Settings
LAN port
Connect the network with the LAN cable that comes with the main unit.
Connect LAN Cable
USB-A (0.5 A) port
Connect USB-connectable products (BCR-POP1, SCD222U*) specified by Star Micronics to establish communication.
This product supports USB HID class (keyboard mode)* and USB HUB.
In addition, this port can also be used to supply power (0.5 A max.) to USB peripherals.

* There are restrictions if you use BCR-POP1, SCD222U, or USB HID class (keyboard mode).
For details, see Use USB Device.

Use Peripherals
Set Up External Devices - USB-A Port
Use Third-party External Devices - USB HUB
USB-C port
Connects an Android/Windows device via the USB cable that comes with the main unit. Communication and power supply (up to 20 W) can be performed.
Connect USB Cable
Set Up External Devices - USB-C Port
Connector to drive external device
Connects a cash drawer and/or external buzzer (options).
Set Up External Devices - External device drive connector
Power connector
Connect the power adapter cable that comes with the main unit.
Connect AC Adapter

Use USB Device

    Pay attention to the following points when connecting using a BCR-POP1, SCD222U, or USB HID class (keyboard mode) device with the mC-Label3.

  • Information for general users
    1. The device can be connected by USB to mC-Label3 and used only if the application (or system) which is used supports the above USB devices. For the support status, check with the application (or system) provider.
    2. These devices cannot be used with general-purpose applications (such as Excel or Notepad).
  • Information for developers
    The operation of all commercially available USB HID class (keyboard mode) devices is not guaranteed.
    Star Micronics does not check the operation of every kind of device. Therefore be sure to fully verify operation with the actual equipment before actually beginning use. Some commercially available devices cannot communicate correctly with this product.

  • Please direct any inquiries regarding support for USB HID class devices to here.