From the fuse of the situation can be sure machine elements are seriously short of. Disconnect the main board and the high voltage transformer connection, replace the 10A insurance tube connected to power panel, all the normal operation, current meter measures the total current is about 0.7A, power measuring barbecue electric heater is normal, it can be concluded that parts and components caused by fire insurance are the following: the magnetron, main transformer, high voltage rectifier diode or a high voltage capacitor. Use. Model 500 multimeter resistance gear measuring magnetron filament resistance of 1 Ω, the two ends of the filament and ground resistance are infinite, normal. DC resistance of main transformer primary winding 2.2 Ω, high-voltage winding DC resistance of 130 Ω, high-voltage capacitor is without short circuit, high voltage diode is reverse resistance is also normal, see is difficult to judge the fault which element from the element resistance test results, but the fault is like analysis may be a high-pressure soft breakdown problem, because these four components are possible high pressure soft breakdown. First disconnect the magnetron, a high voltage diode and capacitor, only connected high voltage transformer and AC voltage 500 multimeter measuring windings, respectively 3.5V and 2100V, normal. In the circuit and access high voltage capacitor and diode, a clamp meter measurement, current is up to 9A, and slowly rising, to 11A insurance tube and burned out, among which three must have a bad, start from simple, first for high voltage diode and capacitor, power measuring current, current from the 6.5A and slow rise to 8.9A and unstable, then touch the main power transformer severe fever. When the fault has been basically clear, main transformer adverse exist team poor thermal stability and increased with the start time and the burning fuse. Then change the voltage transformer, connected with the magnetron, boot boil a cup of water, about half a minute to boil, and have reached the standard value of the measured curre

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