Panasonic NN­GS595A - 3.3 General Part Replacement Guidelines; 3.4 Fuse Replacement for Short Switch Operation

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Groundingoftheinvertercircuitboard
WARNING!DISCHARGETHEHIGHVOLATGECAPACITORS
Forabout30secondsaftertheovenisturnedoff,anelectricchargeremainsinthehighvoltagecapacitorsintheInverterPower
Supplycircuitboard.
Whenreplacingorcheckingparts,removethepowerplugfromtheoutletandshorttheinverteroutputterminalofthemagnetron
filamentterminalstothechassisgroundwithaninsulatedhandlescrewdrivertodischarge.Pleasebesuretotouchthechassis
groundsidefirstandthenshorttotheoutputterminals.
Dischargingthehighvoltagecapacitors
WARNING
Thereishighvoltagepresentwithhighcurrentcapabilitiesinthecircuitsoftheprimaryandsecondarywindings,chokecoiland
heatsinkoftheinverter.Itisextremelydangeroustoworkonornearthesecircuitswiththeovenenergized.DONOTmeasurethe
voltageinthehighvoltagecircuitincludingthefilamentvoltageofthemagnetron.
WARNING
Nevertouchanycircuitwiringwithyourhandorwithaninsulatedtoolduringoperation.
3.3Partreplacement
Whenanypartorcomponentistobereplaced,alwaysensurethatthepowercordisremovedfromthewalloutlet.
3.4Whenthe10Afuseisblownduetotheoperationof
theshortswitch
WARNING
Whenthe10A220Vfuseisblownduetotheoperationoftheinterlockmonitorswitch,replaceallofthecomponents(primarylatch
switch,shortswitchandpowerrelayB(RY1)).
1.Thisismandatory.Referto“adjustmentsandmeasurements”forthelocationoftheseswitches.
2.Whenreplacingthefuse,confirmthatithastheappropriateratingforthesemodels.