GE ZEK957 Series Technical Service Manual

Also see for JKP18 Series: Owner's manual Owner's manual Owner's manual Installation instructions Installation instructions

GE ZEK957 Series Technical Service Manual Manual pdf 35 page image

– 33 –Microwave Key Panel TestThe control panel circuits from the keys to thePCB can be verified by a continuity test.Refer to the chart in the mini-manual locatedbehind the control panel.Microwave High-Voltage CapacitorWARNING: Always be certain the capacitor isdischarged before servicing. Mechanically dis-charge by placing an insulated handle screwdriverbetween the diode connection of the capacitor andthe oven chassis ground.Note: The high-voltage capacitor has an internalshunt resistor that automatically discharges thecapacitor when the oven turns off. Under normaloperation, the capacitor should fully dischargewithin 30 seconds.The microwave must be removed from the ovento service the high-voltage capacitor.The high-voltage capacitor is mounted to the baseplate at the rear of the component compartment.If the capacitor is open, no high voltage will beavailable to the magnetron.High-Voltage Capacitor Test1. Disconnect the leads and check for short oropen between the terminals using an ohmme-ter set on high ohm scale. If the capacitor isnormal, the meter will indicate continuity for ashort period and should indicate an opencircuit once the capacitor is charged.2. If the above is not the case, check for a shortbetween either terminal and the case. Ifshorted, replace the capacitor.High-Voltage CapacitorDiode