Furuno 1622 Service Manual page 23

Magnetron
Handle the magnetron, taking the followings into account.
1. Use a non-magnetic screw driver to dismount and mount the magnetron.
2. Keep the magnetron 25mm away from the metals.
3. Never pull the magnetron lead wires.
MIC
See figure below.
Figure 4-8.
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4.2!Replacement of Major Parts