Patent ID: 8353571

Claim:
A method for manufacturing a liquid ejecting apparatus, comprising: forming, on a flexible board, a first input line and a second input line for inputting a driving signal, for ejecting a liquid, respectively to a drive circuit and an actuator including a piezoelectric element operated by the drive circuit; mounting the drive circuit on the flexible board; providing a thermistor between the first input line and the second input line on the flexible board, the thermistor having a first resistance value with terminals provided therein being in an electrically disconnected state at a temperature greater than or equal to a predetermined temperature, and having a second resistance value less than the first resistance value with the terminals being in an electrically connected state at a temperature less than the predetermined temperature; connecting the flexible board to the actuator; applying polarization heat greater than or equal to the predetermined temperature to the actuator while the thermistor has the first resistance value and the first input line and the second input line are in an electrically disconnected state from each other, and then applying different potentials to the first input line and the second input line so as to input a polarization signal to the actuator through the first input line and the second input line, respectively, thereby polarizing the actuator; and removing the polarization heat that is greater than or equal to the predetermined temperature from the actuator while the thermistor has the second resistance value and the first input line and the second input line are in an electrically connected state with each other via the thermistor, and then placing the actuator in a drivable state in accordance with input of the driving signal to the actuator through the first input line and the second input line.