| 摘要 |
A method of operating a thermal printhead includes the steps of periodically determining a current value proportional to the resistance of printhead elements; providing a warning signal when the current value of any element exceeds a predetermined multiplier of the nominal value; and then modifying the operation of the printhead so that such element is energized only for the printing of a barcode within the printed area. An apparatus, especially a weighing apparatus, for carrying out such a method is also disclosed.
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