Panasonic NN­GS595A - 3 SAFETY & TROUBLESHOOTING PRECAUTIONS; 3.1 Grounding Check Importance; 3.2 High Voltage Inverter Warnings

10/24/2016 XMLServiceManual
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3CAUTIONSTOBEOBSERVEDWHEN
TROUBLESHOOTING
Unlikemanyotherappliances,themicrowaveovenisahighvoltage,highcurrentdevice.Itisfreefromdangerinordinaryuse,
thoughextremecareshouldbetakenduringrepair.
Caution
Servicemenshouldremovetheirwatcheswheneverworkingclosetoorreplacingthemagnetron.
3.1Checkthegrounding
Donotoperateonatwowireextensioncord.Themicrowaveovenisdesignedtobegroundedwhenused.Itisimperative,
therefore,toensuretheapplianceisproperlygroundedbeforebeginningrepairwork.
3.2Inverterwarnings
DANGER,HIGHVOLTAGEANDHIGHTEMPERATURE(HOT/LIVE)OFTHEINVERTERPOWERSUPPLY(U)
TheHighVoltageInverterPowerSupplyhandlesveryhighvoltageandcurrentforthemagnetrontube.Thoughitisfreefrom
dangerinordinaryuse,extremecareshouldbetakenduringrepair.
Thealuminumheatsinkisalsoenergizedwithhighvoltage(HOT),donottouchwhentheACinputterminalsareenergized.The
powerdeviceCollectorisdirectlyconnectedtothealuminumheatsink.
ThealuminumheatsinkmaybeHOTduetoheatenergy,therefore,extremecareshouldbetakenduringservicing.
H.V.Inverterwarning
WARNINGFORINVERTERPOWERSUPPLY(U)GROUNDING
ChecktheHighVoltageInverterPowerSupplycircuitgrounding.Thehighvoltageinverterpowersupplycircuitboardmusthavea
properchassisground.Theinvertergroundingbracketmustbeconnectedtothechassis.Iftheinverterboardisnotgroundeditwill
exposetheusertoveryhighvoltagesandcauseextremeDANGER!Besurethattheinvertercircuitisproperlygroundedviathe
invertergroundingbracket.