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7-2. Clearing the Input Buffer In case it is desired to delete the data in the input buffer, the power switch should be turned on while pressing the SEL switch. When deletion of the buffer is completed the buzzer will sound. Please be sure to continue pressing the SEL switch until that time. If the printer fails to work properly at the time the power switch is turned on, please delete the input buffer as described above before inputting new data. CITIZEN 18/48 iDP-3540/41 User’s Manual 8. Parall