3.
4.
Press the / buttons to select [Tools], and then press the button.
5.
Press the / buttons to select [Barcode Checker] > [Test], and then press the button.
Even when GFS4520 is installed, [GFS4400] is displayed, but it can be used without any problem.
7.
Press the / buttons to select [Reading Test], and then press the button.

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