A discrete Raman amplifier comprises a Raman gain fiber, an input port into the Raman gain fiber for receiving optical signals to be Raman amplified, and an output port out of the Raman gain fiber for emitting Raman-amplified optical signals. A solar thermal panel connected to the reservoir heats a fluid traveling through a conduit, which is connected to a heat exchanger within the reservoir. In an inspection process of the liquid crystal apparatus having such a configuration, a plurality of inspection terminals for supplying predetermined drive signals to the wires are brought into contact with the second portions of the wires.