JRC JMR-92 Series Field Service Manual page 313

Step 3 Replace the magnetron cover.
Make sure there is no charge remaining in the modulation high-voltage circuit board, and then
remove the screws (two M4 screws) holding the magnetron cables (yellow and green) in place.
Remove the screws (four M4 screws) holding the magnetron in place, then replace the
magnetron after cutting the leads (yellow and green) for the replacement magnetron to an
appropriate length.
After having replaced the magnetron, reassemble the unit by following the disassembly
procedure in the reverse order. Do not forget to tighten the bolts or screws, and make sure that the
cables are connected.
Use a non-magnetic screwdriver because the contact of the metal tool with the
magnetron causes deterioration of its performance.
Make sure that the magnetron leads (yellow and green) do not contact and are pulled
away from other parts or the casing. Contact may cause them to discharge.
Remove the green cable.
Remove the yellow cable.
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Magnetron
Remove the four screws.
Remove the two screws.
Chapter 4 Replacement procedure