Oven Cavity; Turntable - Panasonic Microwave Ovens with Inverters Technical Manual

Whenever you replace the magnetron, measure for radiation leakage before the
outer panel is installed and after all necessary components are replaced or
adjusted.
Warning:
Special care should be taken in measuring around the magnetron.
Avoid contact with any of the high voltage parts while conducting the radiation
leakage test.

Oven cavity

The cavity is a multimode cavity resonator
designed to resonate the microwaves
emitted from the magnetron. Here is where
the food is placed for cooking or heating.
The oven cavity is made with stainless
steel, aluminum, or painted steel plate to
reflect the microwaves.
Oven Cavity
Figure 4

Turntable

The microwaves come into the oven's cavity
from the side of the oven to ensure that the
microwave field evenly covers the top, sides,
and bottom of the food. The turntable then
exposes all parts of the food to the field, for
perfect results every time.
Turntable
Figure 5
5