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If the microwave does not power on correctly, the capacitor may be at fault. Always use caution when working with electrical devices.
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Remove the eight screws holding the wood-patterned cover to the microwave frame.
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The first four screws are located on either side of the microwave front.
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Remove the additional four screws securing the wood-paneled case to the microwave frame.
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Placing your hands on either side of the case, slide the case back gently until you feel it completely separate from the microwave frame.
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Lift the case upward slowly until the case is free of the microwave.
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The capacitor stores a small amount of electrical energy. Discharge capacitor by placing a screw driver across the terminals. Use a screwdriver with a non-metallic handle and a shaft that is longer than 4” (10.75mm) Touch the metal shaft of the screwdriver simultaneously to both metal terminals of the capacitor. There should be a spark.
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If the capacitor sparks, you can stop reading here. The spark indicates that the capacitor is working properly. If the capacitor does not spark, read on to Step 6.
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Place the multimeter on resistance mode and test the resistance of the capacitor.
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If the resistance increases/decreases, the capacitor is working fine. If the resistance of the capacitor reads 0 or over several kilo ohms, the capacitor needs to be replaced.
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Tip the microwave back so it is lying face up. This allows access to the screws beneath the transformer.
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Locate the transformer. The capacitor cannot be removed without removing the transformer first.
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Locate and unhook all wires connecting the transformer to the rest of the microwave.
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Remove the four exterior screws securing the transformer to the microwave frame.
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The metal band locking the capacitor in place can now be accessed. Locate and remove the screw securing the the metal band.
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Lift the metal band off the capacitor.
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You can now install a replacement capacitor.
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Repeat all steps in reverse order to install a capacitor in a Quasar Microwave MQ7774XW (1984).
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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Cal Poly, Team 2-12, Propen Fall 2012 crwdns2935289:0Cal Poly, Team 2-12, Propen Fall 2012crwdne2935289:0
CPSU-PROPEN-F12S2G12
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