Triac - works Kt16P single phase thyristor regulator / power adjustment trigger plate due to positive feedback BG1 and BG2 posed SCR BT136S-600E, so once the thyristor SCR BT134W- 600E, even to the gate G of the current control disappears, the thyristor still able to maintain the conduction state, since the trigger signal is triggered only play the role of SCR, without Shutdown, so this thyristor is not turned off. Triac - Detection DIP4 pin type ZC triac optocoupler 2. After distinguishing T1 G pole and pole (1) identify the T2 pole, first assume that the rest of the feet in a foot of Tl pole, the other foot for G pole. (2) the black pen then T1 pole, the red pen then T2 pole, resistance is infinite. Followed by the red pen to T2 and G shorted SCR, are fertile Electronics (certified), SCR provided by Dongguan City is fertile Electronic Technology Co., Dongguan City is Wal-Electronic Technology Co., Ltd. (www.dgmydz.com) (www.dgmydz.com) is Dongguan, FET leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum limits to meet customer needs. Wal-electronics leader in the positive with the staff warmly welcome all inquiries negotiations to create a positive future Wal-electron better.