JRC JMR-92 Series Field Service Manual page 515

Step 2 Remove the modulation unit cover.
Remove the screws (six M4 screws) and slide the modulator cover to the right to remove it.
Step 3 Replace the magnetron cover.
Remove the screws holding the cables (two M4 screws) and the bolts holding the magnetron
(eight M6 screws) and remove the metal fitting and the magnetron.
Remove the two screws.
Modulator cover
Loosen the six screws.
Yellow cable
Green cable
Remove the eight bolts.
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Modulator
Magnetron
Chapter 4 Replacement procedure