200W PC power supply switching 110V-220V with TL494

This be PC power supply for Computer again interesting circuit. May advantage with friends at do an occupation can repair a computer? By think be the character Switching power supply 200W sizes take AC Voltge Source 2 level be 110V and 220V choose can use leisurely. And still use volt out many the group be +5V ,+12V, -12V enough will use for small-sized computer or AT power supply. When see the circuit will think use the integrated circuit IC TL494 be pillar equipment. Make the circuit sees not difficult or repair easy there. The detail is other , please see in the circuit better.
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