Electronic apparatus, print head, and method for manufacturing electronic apparatus

A print head comprising a circuit substrate, wherein

• the circuit substrate includes
• a signal through-hole through which an electrical signal for driving the print head is supplied,
• a reference through-hole set to a reference electrical potential, and
• a first inspection through-hole to which a signal is not supplied when the print head is used, and
• a distance between the reference through-hole and the first inspection through-hole is shorter than a distance between the reference through-hole and the signal through-hole.

A method for manufacturing an electronic apparatus including a first circuit substrate,

• another electronic apparatus including a second circuit substrate having a same function as the first circuit substrate, the method comprising:
• if conduction between a reference through-hole disposed in the second circuit substrate and set to a reference electrical potential and a first inspection through-hole that is disposed in the second circuit substrate and to which a signal is not supplied when the other electronic apparatus is used is not confirmed, manufacturing the electronic apparatus by using the second circuit substrate as the first circuit substrate;
• and
• if the conduction between the reference through-hole and the first inspection through-hole is confirmed, manufacturing the electronic apparatus without using the second circuit substrate, wherein
• a distance between the reference through-hole and the first inspection through-hole is shorter than a distance between the reference through-hole and a signal through-hole through which an electrical signal for driving the electronic apparatus is supplied.