D. MAGNETRON REMOVAL

(1)Disconnect the wire lead from the magnetron.

(2)Carefully remove the mounting screws holding the magnetron and the waveguide.

(3)Remove the magnetron assembly until the tube is clear from the waveguide.

NOTE:

1.When removing the magnetron, make sure its dome does not hit any adjacent parts, or it may be damaged.

2.When replacing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition.

3.After replacing the magnetron, check for microwave leakage with a survey meter around the magnetron. Microwave energy must be below the limit of 5 mW/cm2 . (With a 275 ml. water load).

Make sure that gasket is rigidly attached to the magnetron. To prevent microwave leakage, tighten the mounting screws properly, making sure there is no gap between the waveguide and the magnetron.

Air duct

Magnetron

Waveguide

Dome

Waveguide

Bracket

Magnetron

Gasket

Magnetron

Figures 11

E. REMOVING THE TURNTABLE MOTOR 1) Remove the turntable and rotating ring.

2) Lay the unit down on its back.

3) Remove the turntable motor cover.

The turntable base cover is easily removed by pinching the eight parts with a wire cutting.

4) Disconnect the leadwire from the turntable motor terminals.

5) Remove the screw securing the turntable motor to the oven cavity ASSEMBLY.

6) After repairing the motor, rotate the removed turntable motor cover.

7) Fit the turntable motor cover’s projecting part to the base plate slit.

8) The taptite screw shall be used when a turntable motor cover is secured with a screw.

NOTE:

1. Remove the wire lead from the turntable motor VERY CAREFULLY.

2. Be sure to grasp the connector, not the wires, when removing.

Taptite Screw

Wire Leads

Turntable Motor

Figures 12

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Whirlpool 721.663398 manual Magnetron Removal
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721.663398 specifications

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