18 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE
18.1.Replacement of magnetrons (Upper and Lower)
Upper magnetron
1.Discharge electric charge remaining on the high voltage capacitors.
2.Remove the entire rear panel by removing screws as shown.
3.Disconnect all lead wires from magnetron and thermal cutout.
4.Remove the 4 screws holding magnetron.
5.Remove 2 screws holding thermal cutout.
6.Remove the mounting bracket from magnetron and install it on the new magnetron.
Lower magnetron
1.Discharge electric charge remaining on the high voltage capacitors.
2.Remove the entire rear panel by removing screws as shown.
3.Carefully place the unit on its left side (H. V. Capacitor side).
4.Remove the cover by removing 2 screws.
5.Remove the 4 screws holding magnetron by inserting screwdriver through the 4 openings on bottom plate.
6.Remove 2 screws holding thermal cutout.
7.Remove the mounting bracket from magnetron and install it on the new magnetron.
NOTE: To prevent microwave leakage, tighten mounting screws properly making sure there is no gap between the waveguide and the magnetron.
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