Circuit Project Electronic

Today I leads Switching supply computer Circuit. Come to give friends in see again. By this circuit has can to give electricity pressure 5V 15A,-5V 1A,12V 10A,-12V 1A and have can to give the electric power about 200W. I hope that this circuit may in rows checking meditation repairs a computer has of friends. By think use the integrated circuit number TL494 again. And still use the transistor power as well. May repair not difficult be lucky sir.