Measuring disassemble 8A insurance, transformers, high voltage capacitors, rectifier diodes were normal ; disengaged magnetron filament pin cable. With a multimeter R × 1 block measured obtaining the resistance of 2Ω ( normal should be less than 1Ω), then measure both feet on the ground resistance 4Ω ( normal should be infinite ) , it is determined that the failure of the magnetron is shorted to ground . Thus can not be heated . Magnetron model 2M213-240GP. Horizontal installation in the machine . Fixing holes on both sides of the tube body and filament pin straight line . After facing the filament pin cooling fan installation, and general pin difference 90 °.7VPservice manual download site

A lot of the same type magnetron , but the pins generally biased to the left or right.7VPservice manual download site
 7VPservice manual download site

The aircraft was left of the original installation location magnetron oven cavity , the right side of the chassis , the gap is only about 1cm, no common position to accommodate the tube pin , the pin must be the same as the original model installed , but this model is the same as the magnetic foot difficult to control the market available .7VPservice manual download site

After repeated pondering and experimenting with other changes scrapped magnetron pin success. Described below.7VPservice manual download site

1 with a screwdriver to pry open the new magnetron tube socket box cover , exposing the four corners of cold riveting stamping fixed point. The remaining two high-frequency coil wrapped around the roots and stem with a soft wrap . Elbow live with a soft cloth with a multi- magnetron other end of the waveguide head position, so as to avoid damage.7VPservice manual download site

2 hand drill to install 5mm diameter drill bits, respectively, four cold riveting point drill . And carefully clean with a brush and magnet iron filings from drilling , and then remove the soft paper .7VPservice manual download site

3 The magnetron tube socket boxes need to gently twist the direction of rotation 90 °. At this junction of two high-frequency coil filament leads slightly deformed. Basis having plastic surgery as recovery , in order to avoid short circuit.

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