CITIZEN CT-S2000L - Manual (Page 30)

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2 Set paper to the printer.
This printer has three types of built-in paper sensors.
In case of label, set it so that label is positioned on the label light receiving sensor and
label light emitting sensor. In case of black mark paper, set it so that the printable
portion (other than black mark) is positioned on the black mark sensor. With this state
kept, closing the printer cover causes ERROR LED to blink with the buzzer sound.
Label light emitting sensor
Label light receiving sensor
Black Mark sensor(BM1)
3 Adjust the sensitivity of the paper sensor and measure the length of paper.
Pressing the FEED switch causes label to be fed and paper sensor sensitivity adjustment
and paper length measurement are carried out automatically. If the FEED button is
pressed during the paper measuring, the result will be printed out as follows, and the
printer memory switch will be initialized.
* The measuring result is a reference value
showing a label length
showing a gap between labels
< Example of label measuring result >
Black Mark sensor(BM2)
Black Mark sensor(BM3)