Check that the USB cable is securely connected, and the printer has power. Verify that the computer recognizes the USB device in the Device Manager.
The driver is likely responsible for:
Because transactional passbook printers rely on strict control commands—such as automatic page alignment and page thickness detection—installing the correct driver and configuring the internal hardware emulation mode is critical to prevent errors. Technical Profile of the CITIC PB2 Hardware Driver Citic Pb2