Citizen CMP-40 SERIES User Manual page 58

4.2.2 Testing the Black Mark Lower Mode
(1) Cover the lower black mark with a label.
(2) When the following message is displayed, press the Enter ( )
button to continue.
To cancel the calibration process, press the Power ( ) button.
When you press the Enter ( ) button, the information label will
start printing.
(3) Press any key to exit the Menu.
Insert Media...
OK to calibrate,
POWER to abort
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