JRC JMR-92 Series Field Service Manual page 253

Bow side
Step 2 Remove the screws holding the magnetron cable.
Measure the voltage between pin 1 and pin 3 of CPA-264 (modulation circuit) by using the
multimeter (1000 V DC or more), check that there is no remaining electric charge in the modulation
high-voltage circuit board. Remove the two screws (M4) holding the magnetron cables (both
yellow and green).
Turn Off the safety switch.
Example: Port side cover removal
Remove the eight
hexagonal screws.
4-33 Chapter 4 Replacement procedure