Panasonic NN­GS595A - 5.4 Membrane Keyboard Testing; 5.5 High Voltage (H.V.) Inverter Testing

10/24/2016 XMLServiceManual
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5.4Membranekeyboard(Membraneswitchassembly)
Checkcontinuitybetweenswitchterminals,bytappinganappropriatepadonthekeyboard.Thecontactsassignmentofthe
respectivepadsonthekeyboardisasshownindigitalprogrammercircuit.(RefertoMiniManual)
5.5Inverterpowersupply(U)
DONOTtrytoREPAIRH.V.Inverterpowersupply(U).ReplacecompleteH.V.Inverter(U)Unit.
DANGERHIGHVOLTAGE
TestiffailurecodesofH95,H97orH98appearbydoingthefollowingprocedure.ItisrecommendedtouseanAClineinputcurrent
Amperemeterfortesting.
Test1
1.ProgramDPC.
1.PressTimer/Clockpadtwice.
2.PressStartpadonce.
3.PressMicroPowerpadonce.
2.Place1literofwaterloadintoovencavity.
3.Unplug2pinH.V.leadwireconnectorCN703frommagnetrontube.
4.ProgramovenatHighpowerfor1minuteandpressstart.
1.Afterapproximately23seconds,ovenstops.
2.Duringovenoperation,inputcurrentisapproximately0.5to1A.IfbothaandbareOK,proceedtotest2.
INPUTAMPERE FAILURECODE
UnplugCN703 0.5to1A Ovenstopsin23secondsafterstarted.
Test2
ContinuedfromTest1
1.Unplug3pinconnectorCN701.CN703remainsunplugged.
2.ProgramovenatHighpowerfor1minuteandpressstart.
1.Afterapproximately3seconds,ovenstops.