Patent ID: 7980774

Claim:
A recording apparatus comprising: a head driving circuit that has a power supply which supplies a driving current to a plurality of driving coils which respectively drives a plurality of recording wires provided in a recording head, and a circuit which is commonly connected to the driving coils, the circuit through which an induced current flows when the supply of the driving current to the driving coils stops; a constant voltage circuit that causes the induced current to stop at a predetermined voltage or less; a thermistor that detects a temperature change which occurs in the circuit due to the induced current; a controller that controls an operation state of the recording head based on the temperature change detected by the thermistor; and a substrate on which the constant voltage circuit and the thermistor are mounted, wherein the constant voltage circuit is mounted on one surface of the substrate and a first heat dissipation pattern for conducting heat generated from the constant voltage circuit is formed on the one surface of the substrate; wherein the thermistor is mounted on another surface of the substrate and a second heat dissipation pattern is formed on the another surface of the substrate at a position overlapping the first heat dissipation pattern; wherein the first heat dissipation pattern and the second heat dissipation pattern are connected to each other by a through hole passing through the substrate; wherein the thermistor is disposed on the another surface of the substrate opposite the first heat dissipation pattern.