Print head control circuit, print head, and liquid discharge apparatus

A print head comprising:

• a driving element that drives based on a driving signal, so as to discharge a liquid from a nozzle;
• a first connector including
• a first terminal to which a first diagnosis signal is input,
• a second terminal to which a second diagnosis signal is input,
• a third terminal to which a third diagnosis signal is input,
• a fourth terminal to which a fourth diagnosis signal is input, and
• a fifth terminal to which the driving signal is input;
• and
• a diagnosis circuit that diagnoses whether or not normal discharge of the liquid is possible, based on the first diagnosis signal, the second diagnosis signal, the third diagnosis signal, and the fourth diagnosis signal, wherein
• a shortest distance between the fifth terminal and the diagnosis circuit is longer than a shortest distance between the first terminal and the diagnosis circuit, longer than a shortest distance between the second terminal and the diagnosis circuit, longer than a shortest distance between the third terminal and the diagnosis circuit, and longer than a shortest distance between the fourth terminal and the diagnosis circuit.

A liquid discharge apparatus comprising:

• a print head;
• and
• a print head control circuit that controls an operation of the print head, wherein
• the print head includes
• a driving element that drives based on a driving signal, so as to discharge a liquid from a nozzle,
• a first terminal to which a first diagnosis signal is input,
• a second terminal to which a second diagnosis signal is input,
• a third terminal to which a third diagnosis signal is input,
• a fourth terminal to which a fourth diagnosis signal is input,
• a fifth terminal to which the driving signal is input, and
• a diagnosis circuit that diagnoses whether or not normal discharge of the liquid is possible, based on the first diagnosis signal, the second diagnosis signal, the third diagnosis signal, and the fourth diagnosis signal,
• the print head control circuit includes
• a first cable including
• a first diagnosis signal propagation wiring for propagating the first diagnosis signal,
• a second diagnosis signal propagation wiring for propagating the second diagnosis signal,
• a third diagnosis signal propagation wiring for propagating the third diagnosis signal,
• a fourth diagnosis signal propagation wiring for propagating the fourth diagnosis signal, and
• a first driving signal propagation wiring for propagating the driving signal;
• a diagnosis signal output circuit that outputs the first diagnosis signal, the second diagnosis signal, the third diagnosis signal, and the fourth diagnosis signal, and
• a driving signal output circuit that outputs the driving signal,
• the first diagnosis signal propagation wiring is electrically in contact with the first terminal at a first contact section,
• the second diagnosis signal propagation wiring is electrically in contact with the second terminal at a second contact section,
• the third diagnosis signal propagation wiring is electrically in contact with the third terminal at a third contact section,
• the fourth diagnosis signal propagation wiring is electrically in contact with the fourth terminal at a fourth contact section,
• the first driving signal propagation wiring is electrically in contact with the fifth terminal at a fifth contact section, and
• a shortest distance between the fifth contact section and the diagnosis circuit is longer than a shortest distance between the first contact section and the diagnosis circuit, longer than a shortest distance between the second contact section and the diagnosis circuit, longer than a shortest distance between the third contact section and the diagnosis circuit, and longer than a shortest distance between the fourth contact section and the diagnosis circuit.