JRC JMR-92 Series Field Service Manual page 509

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.
Be careful to attach the colored cables (yellow and green) to the correct connections on the
replacement magnetron. 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
connect the cables.
Use a shielded 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.
Modulator cover
Loosen the six screws.
4-289 Chapter 4 Replacement procedure