Panasonic NN-C784MF User manual

6/17/2017 s0000000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/3
ServiceManual
TOPNEXT
ORDERNO.SIMMC0408027A3
MicrowaveOven
NNC784MF
NNC784WF
HPE(HongKong)
YPQ(Singapore)
MPQ(Malaysia)
TPE(Thailand,Indonesia)
YTE(Others)
KTE(UAE)
KUE(Egypt)
PTE(Iran)
KPQ(Kuwait,Doha,Qatar,Oman,Bahrain,Pakistan)
STM(SaudiArabia)
ZPE(CISCountries)
PleasefileandusethismanualtogetherwiththeservicemanualforModelNNC781JF(ORDERNO.SIMMC0110022C3).

6/17/2017 s0000000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
2/3
©2004PanasonicHomeAppliancesMicrowaveOven(Shanghai)Co.,Ltd.
Allrightsreserved.Unauthorizedcopyinganddistributionisaviolationoflaw.

6/17/2017 s0000000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
3/3
TOPNEXT

6/17/2017 s0100000000x.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
1SCHEMATICDIAGRAM
TOPPREVIOUSNEXT
1.1NNC784MF/WF(EXCEPTZPE)
1.2NNC784MF(ZPE)
TOPPREVIOUSNEXT

6/17/2017 SCHEMAT1.gif(538×723)
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1

6/17/2017 SCHEMAT2.gif(538×722)
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1

6/17/2017 s0200000000x.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
2CAUTIONSTOBEOBSERVEDWHEN
TROUBLESHOOTING
TOPPREVIOUSNEXT
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.
2.1Checkthegrounding
2.2Inverterwarnings
2.3Partreplacement.
2.4Whenthe10Afuseisblownduetotheoperationoftheshortswitch:
2.5Avoidinsertingnails,wireetc.throughanyholesintheunitduringoperation.
2.6Confirmafterrepair
2.7Sharpedges
TOPPREVIOUSNEXT

6/17/2017 s0202000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/2
2.2Inverterwarnings
TOPPREVIOUSNEXT
DANGER,HIGHVOLTAGEANDHIGHTEMPERATURE(HOT/LINE)OFTHE
INVERTERPOWERSUPPLY(U)
This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),sodonottouchwhentheACinput
terminalsareenergized.Thepowerdevices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notgrounded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earthbracket.

6/17/2017 s0202000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
2/2
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thechassis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sinkoftheinverter.Itisextremelydangeroustoworkonornearthesecircuits
withtheovenenergized.DONOT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.
TOPPREVIOUSNEXT

6/17/2017 s0203000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
2.3Partreplacement.
TOPPREVIOUSNEXT
Whenanypartorcomponentistobereplaced,alwaysensurethatthepowercordisremovedfromthewall
outlet.
TOPPREVIOUSNEXT

6/17/2017 s0204000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
2.4Whenthe10Afuseisblownduetotheoperation
oftheshortswitch:
TOPPREVIOUSNEXT
WARNING
Whenthe10A250Vfuseisblownduetotheoperationoftheinterlockmonitorswitch,replaceallofthe
components(primarylatchswitch,secondary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.
3.Whenreplacingfaultyswitches,besurethemountingtabsarenotbent,brokenordeficientintheirability
toholdtheswitches.
TOPPREVIOUSNEXT

6/17/2017 s0205000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
2.5Avoidinsertingnails,wireetc.throughanyholes
intheunitduringoperation.
TOPPREVIOUSNEXT
Neverinsertawire,nailoranyothermetalobjectthroughthelampholesonthecavityoranyholesorgaps,
becausesuchobjectsmayworkasanantennaandcausemicrowaveleakage.
TOPPREVIOUSNEXT

6/17/2017 s0206000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
2.6Confirmafterrepair
TOPPREVIOUSNEXT
1.Afterrepairorreplacementofparts,makesurethatthescrewsoftheoven,etc.areneitherloosenor
missing.Microwavesmightleakifscrewsarenotproperlytightened.
2.Makesurethatallelectricalconnectionsaretightbeforeinsertingtheplugintothewalloutlet.
3.Checkformicrowaveenergyleakage.(Refertoprocedureformeasuringmicrowaveenergyleakage).
CAUTIONMICROWAVERADIATION
USECAUTIONNOTTOBECOMEEXPOSEDTORADIATIONFROMTHEMICROWAVEMAGNETRON
OROTHERPARTSCONDUCTINGMICROWAVEENERGY
IMPORTANTNOTICE
Thefollowingcomponentshavepotentialsabove2000Vwhiletheapplianceisoperated.
Magnetron
Highvoltagetransformer(Locatedoninverter(U))
Highvoltagediodes(Locatedoninverter(U))
Highvoltagecapacitors(Locatedoninverter(U))
Payspecialattentiontotheseareas.
Whentheapplianceisoperatedwiththedoorhingesormagnetronfixedincorrectly,themicrowaveleakagecan
exceedmorethan5mW/cm2.Afterrepairorexchange,itisveryimportanttocheckifthemagnetronandthe
doorhingesarecorrectlyinstalled.
TOPPREVIOUSNEXT

6/17/2017 s0207000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
2.7Sharpedges
TOPPREVIOUSNEXT
Caution
Pleaseusecautionwhenunpacking,installingormovingtheunit,assomeexposededgesmaybesharptothe
touchandcauseinjuryifnothandledwithcare.
TOPPREVIOUSNEXT

6/17/2017 s0300000000x.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
3MEASUREMENTSANDADJUSTMENTS
TOPPREVIOUSNEXT
3.1Adjustmentofprimarylatchswitch,secondarylatchswitchandshortswitch.
3.2Measurementofmicrowaveoutput
TOPPREVIOUSNEXT

6/17/2017 s0301000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
3.1Adjustmentofprimarylatchswitch,secondary
latchswitchandshortswitch.
TOPPREVIOUSNEXT
1.MountthePrimarylatchswitch,theSecondarylatchswitchandtheShortswitchtothedoorhook
assemblyasshowninILL.
NOTE:
NospecificindividualadjustmentduringinstallationofthePrimarylatchswitch,Secondarylatchswitch
orshortswitchtothedoorhookarerequired.
2.Whenmountingthedoorhookassemblytotheovenassembly,adjustthedoorhookassemblybymoving
itinthedirectionofthearrowsintheillustration,sothattheovendoorwillnothaveanyplayinit.Check
forplayinthedoorbypullingthedoorassembly.Makesurethatthelatchkeysmovesmoothlyafter
adjustmentiscompleted.Completelytightenthescrewsholdingthedoorhookassemblytotheoven
assembly.
3.Reconnecttheshortswitchandcheckthecontinuityofthemonitorcircuitandalllatchswitchesagainby
followingthecomponenttestprocedures.
TOPPREVIOUSNEXT

6/17/2017 s0302000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
3.2Measurementofmicrowaveoutput
TOPPREVIOUSNEXT
TheoutputpowerofthemagnetroncanbedeterminedbyperformingIECstandardtestprocedures.
However,duetothecomplexityofIECtestprocedures,itisrecommendedtotestthemagnetronusingthesimple
methodoutlinedbelow.
NecessaryEquipment:
*1literbeaker*Glassthermometer
*Wristwatchorstopwatch
NOTE:
Checkthelinevoltageunderload.Lowvoltagewilllowerthemagnetronoutput.Takethetemperaturereadings
andheatingtimeasaccuratelyaspossible.
1.Fillthebeakerwithexactlyoneliteroftapwater.Stirthewaterusingthethermometerandrecordthe
water’stemperature.(recordedasT1).
2.Placethebeakeronthecenterofglasstray.
SettheovenforHighpowerandheatitforexactlyoneminute.
3.Stirthewateragainandreadthetemperatureofthewater.(recordedasT2).
4.ThenormaltemperatureriseatHighpowerlevelforeachmodel,isasshownintable.
TABLE(1L1min.test)
RATEDOUTPUT TEMPERATURERISE
1000W Min.8.6°C
TOPPREVIOUSNEXT

6/17/2017 s0302000000.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
3.2Measurementofmicrowaveoutput
TOPPREVIOUSNEXT
TheoutputpowerofthemagnetroncanbedeterminedbyperformingIECstandardtestprocedures.
However,duetothecomplexityofIECtestprocedures,itisrecommendedtotestthemagnetronusingthesimple
methodoutlinedbelow.
NecessaryEquipment:
*1literbeaker*Glassthermometer
*Wristwatchorstopwatch
NOTE:
Checkthelinevoltageunderload.Lowvoltagewilllowerthemagnetronoutput.Takethetemperaturereadings
andheatingtimeasaccuratelyaspossible.
1.Fillthebeakerwithexactlyoneliteroftapwater.Stirthewaterusingthethermometerandrecordthe
water’stemperature.(recordedasT1).
2.Placethebeakeronthecenterofglasstray.
SettheovenforHighpowerandheatitforexactlyoneminute.
3.Stirthewateragainandreadthetemperatureofthewater.(recordedasT2).
4.ThenormaltemperatureriseatHighpowerlevelforeachmodel,isasshownintable.
TABLE(1L1min.test)
RATEDOUTPUT TEMPERATURERISE
1000W Min.8.6°C
TOPPREVIOUSNEXT

6/17/2017 s0400000000x.html
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1
4EXPLODEDVIEWANDPARTSLIST
TOPPREVIOUSNEXT
4.1EXPLODEDVIEW
4.2PARTSLIST
4.3DOORASSEMBLY
4.4WIRINGMATERIALS
4.5ESCUTCHEONBASEASSEMBLY
4.6PACKINGANDACCESSORIES
TOPPREVIOUSNEXT

6/17/2017 Exploded.gif(727×537)
file://royalfs/Service/Technical/ssvvcc/Dehghani%20%20Map/panasonic%20map/macro/cofard%20(E)/nnc784mf/viewing/SGML_VIEW_DATA/OT/NNC784M…
1/1