Common electromagnetism furnace of switching power supply IC with six commonly used models of manifold blocks:. VIPer12A. VIPer22A. THX201A. THX202H. FSD200. 5,6,7.8 LNK364P such as pin. Connect to 300V high voltage.1.2. Pin grounding. Generally :VIPer12A or VIPer22A. Both can be directly replaced. For example, pin 7 is connected to the base of the triode MJE13007, pin 6 is connected to the emitter of the triode,4. Feet grounded.2 feet empty, THX201A. For example, only 7 feet.8 feet connected to high voltage.7. Pin switch transformer.1.2.3. Pin ground. No 6 pin.4. The collector of the pin triode is :FSD200. Such as 1 pin start resistance.7.8. Pin switch transformer.3 pin ground.6. Empty pin. Yes :THX202H. For example, 1.2.7.8. Pin ground.5 pin switch transformer, none