Carefully open the case, first check the power supply circuit. Remove 8A/250V fuse, from the appearance is not blown, but has been measured with a multimeter circuit, short circuit description is not serious. After the replacement should immediately energized fuse should find out why. After investigation, the door interlock switch LXW1-10B16 (0.3A/250V) from locating slot off, and one end of the connector piece has been broken. The homing switch and fix the inserts power test machine, turn the fan tray, bright lights, but not heated.CU9service manual download site

Normal multimeter test voltage diode T01 (14512) and the high-voltage capacitor CH85 (0.85 &mICro; F/2100AC). Y600STC energized high voltage transformer primary measure no voltage (power should be removed before the test TS01 and CH85, can not afford the high-frequency oscillation circuit), the problem may in time switch.CU9service manual download site
Timer switch wiring pile feet from left to right are: 1 feet to the fan motor, power line 2 feet to 3 feet to magnetrons MT, 4 feet to lighting, 5 foot space, 6 feet to the tray motor. The investigation was poor contact between the wiring pile two feet and plugs, plug polished trim and tighten them after power test machine, the microwave oven work back to normal.CU9service manual download site