FIELD: electricity.
SUBSTANCE: mechanism for head elements functioning checking in a printer equipped with a head containing multiple head elements has a controller controlling the switch for selective connection of the resistor element envisaged in each head element to the resistor element. The testing power supply source supplies test voltage to the serial circuit composed of the testing resistor element and the resistor element. The split voltage measurement unit measures spit voltage of the serial circuit composed of the testing resistor element and the resistor element in response to the controller control signal.
EFFECT: simplification of means for detection of faulty elements of the thermal printer without their heating during cheek for failures; provision for the possibility to determine the total quantity of elements of the head installed in the printer.
8 cl 6 dwg
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