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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.
18 DISASSEMBLY AND PARTS REPLACEMENT
PROCEDURE
26
NE-1257R/NE-1257CR / NE-1757R/NE-1757CR / NE-2157R/NE-2157CR / NE-1258R