Panasonic NN­GS595A - 5.6 Temperature Thermistor Testing; 5.7 IR Sensor Testing

10/24/2016 XMLServiceManual
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2.Duringovenoperation,inputcurrentisapproximately0.4A.
INPUTAMPERE FAILURECODE
UnplugCN701 <0.4A Ovenstopsin3secondsafterstarted.
IfbothaandbcheckOK,theInverterPowerSupply(U)canbedeterminedtobeOK.
5.6Temperaturethermistor
Thesesensormonitorstheheatproducedbytheheatercircuitandmaintainsthemagnetrontemperaturewhichuserhadselected.
Normalroomtemperature10°Cto30°C,thereadingacrossthetemperaturethermistorshouldbeasfollows.
TEMP MAGNETRONTHERMISTOR STEAMHEATERTHERMISTOR OVEN
THERMISTOR
TEMP MAGNETRONTHERMISTOR STEAMHEATERTHERMISTOR OVEN
THERMISTOR
100°C 3060KΩ 1020KΩ 1020KΩ
25°C 700K1.5MΩ 100K300KΩ 100K300KΩ
Iftheresistancereadingisoutoftherangestatedhere,thethermistorisdetectiveandmustbereplaced.
5.7IRSensor
TotestifIRsensorisokbydoingthefollowingprocedures.
Test
1.ProgramDPC.
1.PressTimer/Clockpadtwice.
2.PressStartpadonce.
3.PressMicroPowerpadonce.
2.Openthedoor,thenkeeppressingStartpadformorethan2secondsuntilbuzzerbeeps.
3.RemaindooropeningandpressStartpadtwice,then"°C"willbeshownonthedisplay.
4.Closethedoor.
5.PressStartpad,IRsensorwillswing.After4seconds,itwillstopandshowmaxandminimumtemperaturereadingsof
8eyesIRsensorondisplay.
6.Ifthereadingiswithinthelimitedrangeofoventemperature,andallaboveisok,youmaydecideIRsensorfunctions
properly.
7.PressStop/Resentpadtofinishthetest.