Print head control circuit, print head, and liquid ejecting device

A print head control circuit includes a first diagnosis signal propagation wiring for propagating a first diagnosis signal, a second diagnosis signal propagation wiring for propagating a second diagnosis signal, a third diagnosis signal propagation wiring for propagating a third diagnosis signal, a fourth diagnosis signal propagation wiring for propagating a fourth diagnosis signal, a fifth diagnosis signal propagation wiring for propagating a fifth diagnosis signal indicating a diagnosis result, a first voltage signal propagation wiring for propagating a first voltage signal supplied to a driving signal selection circuit, and a second voltage signal propagation wiring for propagating a second voltage signal. The fifth diagnosis signal propagation wiring and the second voltage signal propagation wiring are electrically coupled to each other via a fifth terminal and a seventh terminal, and the first diagnosis signal propagation wiring and the second diagnosis signal propagation wiring are located to be aligned. The first diagnosis signal propagation wiring and the second voltage signal propagation wiring are located to be adjacent to each other in a direction in which the first diagnosis signal propagation wiring and the second diagnosis signal propagation wiring are aligned. (From EP3693171 A3)