Patent ID: 7970569

Claim:
A test apparatus for testing connections formed on a printed circuit board having a plurality of connectors in respect of the plurality of connectors and to a plurality of nets each of which includes one of the plurality of connectors, said test apparatus comprising: a plurality of connection test devices, each of which is connected to one of the plurality of connectors and each of which switches an operation mode between a first mode in which a response signal is output in response to an input signal, and a second mode in which the response signal in not output when the connections of the plurality of connectors and the plurality of nets are being tested; a signal generating circuit, formed on the printed circuit board and generating a connection test signal that is to be input as the input signal into said plurality of connection test devices through the plurality of connectors; a controlling section, controlling each of said plurality of connection test devices to switch the operation mode between the first mode and the second mode such that a first connection test device which is one of said plurality of connection test devices is in the first mode and the remaining connection devices are in the second mode, and controlling said signal generating circuit to output the connection test signal; and a judging section judging, on the basis of the response signal that the first connection test device being in the first mode outputs in response to the connection test signal, a state of connection of a first connector which is connected to the first connection test device and which is one of the plurality of connectors and a first net including the first connector among the plurality of nets.