And a high voltage control circuit suspected faulty circuit portion. Open the cover, as usual, first of all let go of residual charge high voltage capacitors, to ensure safety. Then, careful testing high-voltage transformers, high voltage fuse, high voltage capacitors, high voltage diode and magnetron (2M253K), are intact. Then, remove the integration of mechanical control box (Glanz dedicated TMH30MU02E type, with timer, power splitters) and limiting relay (JQX-13F) examination were normal. But found the plug connecting the component parts, are the use of wires, grip extrusion, no tin, and there are different degrees of oxidation corrosion and rust, easily lead to failure due to poor contact. So, for all plug pieces were performed curettage oxide and rust, and apply moisture, oxidation corrosion grease off the high-pressure arc, then clamped with pliers eleven, but also on the individual solder firmly to ensure good contact . After this properly handled, power test machine, microwave heating back to work.sNqservice manual download site