Liquid discharge apparatus

A liquid discharge apparatus comprising:

• a liquid discharge head in which a nozzle is opened;
• an electrode facing the nozzle;
• a power supply configured to apply voltage to the liquid discharge head so as to generate a potential difference between the liquid discharge head and the electrode;
• a first output unit electrically connected to either one of the electrode and the liquid discharge head, and configured to output a first signal in accordance with an electric change in a case that the liquid discharge head is caused to perform inspection driving for discharging the liquid from the nozzle toward the electrode in a state that the liquid discharge head and the electrode are caused to face each other;
• a low-pass filter electrically connected to the liquid discharge head;
• a second output unit electrically connected to the liquid discharge head via the low-pass filter;
• a high-pass filter electrically connected to the liquid discharge head;
• a third output unit electrically connected to the liquid discharge head via the high-pass filter;
• and
• a controller configured to execute:
• determination as to whether or not the liquid is normally discharged from the nozzle, based on the first signal;
• and
• determination as to whether or not a short circuit occurs between the liquid discharge head and the electrode, based on a second signal output from the second output unit and a third signal output from the third output unit.