Pratica Copa Express, Service Manual

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The magnetrons are equipped with an additional RF
gasket that is placed around the antenna and the
existing magnetron gasket. This additional gasket must
have both ends of the material meet without any gaps
to ensure a proper seal. The purpose of these gaskets is
to provide the seal between the magnetron and the
waveguide.
Inspect both gaskets for proper alignment and
performance every time the magnetrons are removed
during a service visit for any reason.
The microwave enters the cook cavity through the waveguides. These waveguides are attached to
the cook cavity sides with a special stainless-steel gasket between the two surfaces. This gasket is
held in place by the compression of the mounting hardware. High temperature silicone must not be
used to seal the gasket to the waveguide because the gasket needs an electrical connection to the
waveguide. The silicone is transparent to microwave which could allow microwave leakage around
the opening. If replacing or servicing the waveguide, ensure that the surfaces are clean and the gasket
makes even contact over the entire surfaces. Replace the gasket if necessary.
RF Gasket
Magnetron
Waveguide
Waveguide
Gasket