Electronic component handler, electronic component tester, and method of checking condition of electronic component handler

A method of checking a condition of an electronic component handler that transports an electronic component, comprising:

• detecting and outputting a position of a first marker of a support member as a first measurement coordinate to a control section by a sensor of a transport robot;
• comparing a first reference coordinate stored in advance with the first measurement coordinate by the control section;
• detecting and outputting a position of a second marker of the support member as a second measurement coordinate to the control section by the sensor of the transport robot;
• comparing first axis components between the first measurement coordinate and the second measurement coordinate by the control section;
• and
• when a difference between the first measurement coordinate and the first reference coordinate is equal to or larger than a predetermined value or when a difference between the first axis components of the first measurement coordinate and the second measurement coordinate is equal to or larger than a predetermined value, outputting a condition in which a moving unit of the transport robot is displaced.