Potenziell gefährlich
Es besteht Verletzungsgefahr, wenn die Anweisungen nicht ordnungsgemäß befolgt werden. Sei vorsichtig und befolge alle Warnhinweise.


If the microwave does not power on correctly, the capacitor may be at fault. Always use caution when working with electrical devices.

  1. Disconnect the power supply cord from the outlet.
    • Disconnect the power supply cord from the outlet.

    Kommentar hinzufügen

  2. Remove the eight screws holding the wood-patterned cover to the microwave frame.
    • Remove the eight screws holding the wood-patterned cover to the microwave frame.

    • The first four screws are located on either side of the microwave front.

    Kommentar hinzufügen

    • Remove the additional four screws securing the wood-paneled case to the microwave frame.

    Kommentar hinzufügen

    • Placing your hands on either side of the case, slide the case back gently until you feel it completely separate from the microwave frame.

    • Lift the case upward slowly until the case is free of the microwave.

    Kommentar hinzufügen

    • Old electronics collect dust, no matter if they are in active use or being stored. It is recommended to clear out some of the dust prior to affecting any complicated repairs. Use compressed air, and wear a dust mask and goggles. Always use precaution when working with old electronics.

    • 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.

    • 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.

    Kommentar hinzufügen

    • Place the multimeter on resistance mode and test the resistance of the capacitor.

    • 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.

    Kommentar hinzufügen

    • Tip the microwave back so it is lying face up. This allows access to the screws beneath the transformer.

    Kommentar hinzufügen

    • Locate the transformer. The capacitor cannot be removed without removing the transformer first.

    • Locate and unhook all wires connecting the transformer to the rest of the microwave.

    • Take note of where each wire connects before disconnecting. Wiring a microwave incorrectly can cause serious damage.

    Kommentar hinzufügen

    • Remove the four exterior screws securing the transformer to the microwave frame.

    Kommentar hinzufügen

    • Remove the transformer.

    Kommentar hinzufügen

    • The metal band locking the capacitor in place can now be accessed. Locate and remove the screw securing the the metal band.

    • Lift the metal band off the capacitor.

    Kommentar hinzufügen

    • Remove the capacitor.

    Kommentar hinzufügen

    • You can now install a replacement capacitor.

    • Repeat all steps in reverse order to install a capacitor in a Quasar Microwave MQ7774XW (1984).

    Kommentar hinzufügen


To reassemble your device, follow these instructions in reverse order.


Mitglied seit 26.09.2012

183 Reputation

2 Anleitungen geschrieben


Cal Poly, Team 2-12, Propen Fall 2012 Mitglied von Cal Poly, Team 2-12, Propen Fall 2012


3 Mitglieder

6 Anleitungen geschrieben

Kommentar hinzufügen

Statistik anzeigen:

Letzte 24 Stunden: 0

Letzte 7 Tage: 3

Letzte 30 Tage: 22

Insgesamt: 3,752