Panasonic NN-V653WF User manual

ORDERNO.SIMMC0303012C2
MicrowaveOven
NN-V653WF NN-V653CF / NN-V623MF NN-F663WF / NN-
F653WF NN-F623MF / NN-V453WF NN-V423MF / NN-T553WF
NN-T523MF / NN-T543WF NN-Q553WF / NN-Q523MF NN-
Q543WF
BPQ(U.K.)
GPG(Germany)
EPG(France, Italy, Finland, Spain, Portugal, Greece, Poland, Holland)
SPECIFICATIONS
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1. SCHEMATICDIAGRAM(FORGRILL MODELS)
2. SCHEMATICDIAGRAM(FORSOLO MODELS)
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3. DESCRIPTIONOFOPERATING SEQUENCE
3.1. Variablepowercooking control
High VoltageInverterPowersupply(U) controlsoutputpowerbythesignal from Digital
ProgrammerCircuit(DPC). Powerrelay stays ONfor P4toP10 and For P1toP3, bothinverter
drive signal and powerrelay tocontrol outputpower.
NOTE:
TheON/OFF timeratiodoes notcorrespond withthepercentageof
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microwavepowersince approximately2secondsarerequiredfor
heating ofmagnetron filament.
VariablePowerCooking
POWERSETTING OUTPUT
POWER(%)
APPROX.
ON-OFF TIME OF
POWERRELAY
(RY1)
ON(SEC) OFF(SEC)
HIGH P10 100% 22 0
P9 90% 22 0
P8 80% 22 0
MEDIUM-HIGH P7 70% 22 0
MEDIUM P6 60% 22 0
P5 50% 22 0
P4 40% 22 0
MEDIUM-LOW P3 30% 22 0
P2 20% 15 7
P1 10% 8 14
DEFROST P3 30% 22 0
3.2. Inverterpowersupplycircuit[NEW H.V.]
ThisInverterPowerSupplyCircuitsupplies 4,000V DC tothemagnetron tubefrom theline
voltage, 230-240V 50HzACinput. functionsas theH.V. transformer, theH.V.capacitor and
H.V.Diode.
1. TheACinputvoltage230-240V50HzisrectifiedtoDC voltage
immediately.
2. DC voltagewill besuppliedtotheswitching devices calledIGBT.
These devices will beswitchedON-OFF bythe20 to40 kHzPWM.
(pulse widthmodulation)signal fromthemicrocomputerinthe
DPC.
3. Thisdrives theHigh voltagetransformertoincrease up to2,000V
ACand approximately3VACbymeansoftransformer.
4. Thenthehalf-wavedoublervoltagerectifiercircuit, consisting of
theH.V. diodes and Capacitors, generates thenecessary4,000V
DC neededforthemagnetron.
5. Outputpowerofthemagnetron tubeisalwaysmonitoredbythe
signal outputfromthecurrenttransformerbuiltintotheinverter
circuit.
6. Thenthissignal will befedback tothemicrocomputerintheDPC
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todetermineoperating conditionsand outputnecessarytocontrol
PWMsignal totheinverterPowerSupplytocontrol outputpower.
3.3. Inverterturbo defrost
WhenthisAutoControl featureisselectedand theStartPadistapped:
1. Thedigital programercircuitdetermines thepowerlevel and
cooking timetocomplete cooking and indicates theoperating
state inthedisplaywindow. Tableshowsthecorresponding
cooking times forrespectiveserving bycategories.
2. Whencooking timethedisplaywindow has elapsed, theoven
turnsoff automaticallybyacontrol signal fromthedigital
programmercircuit.
4. CAUTIONS TO BE OBSERVED WHEN
TROUBLESHOOTING
Unlike manyotherappliances, themicrowave ovenisahigh voltage, high currentdevice. Itis
free from dangerinordinaryuse, though extremecareshouldbetakenduring repair.
Caution
Servicemenshouldremovetheirwatches wheneverworking close
toorreplacing themagnetron.
4.1. Check thegrounding
Donotoperateon atwowireextension cord. Themicrowave ovenisdesignedtobegrounded
whenused. Itisimperative, therefore, toensuretheappliance isproperlygroundedbefore
beginning repairwork.
4.2. Inverterwarnings
DANGER, HIGHVOLTAGE AND HIGHTEMPERATURE (HOT/LINE)OFTHE INVERTERPOWER
SUPPLY(U)
Thishigh voltageinverterpowersupplyhandles veryhigh voltage
and currentforthemagnetron tube. Though itisfree fromdangerin
ordinaryuse, extremecareshouldbetakenduring repair.
Thealuminumheat sinkisalsoenergizedwithhigh voltage(HOT),
sodo nottouchwhentheACinputterminalsareenergized. The
powerdevices Collectorisdirectlyconnectedtothealuminumheat
sink.
Thealuminumheat sinkmaybeHOTduetoheat energy, therefore,
extremecareshouldbetakenduring servicing.
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H.V. Inverterwarning
WARNINGFORINVERTERPOWERSUPPLY(U) GROUNDING
Check thehigh voltageinverterpowersupplycircuitgrounding. The
high voltageinverterpowersupplycircuitboardmust haveaproper
chassisground, theinvertergrounding bracket must beconnected
tothechassis. Iftheinverterboardisnotgroundeditwill expose
theusertoveryhigh voltages and cause extremeDANGER!Besure
that theinvertercircuitisproperlygroundedviatheinverterearth
bracket.
Grounding oftheinvertercircuitboard
WARNING!DISCHARGE THE HIGHVOLATGE CAPACITORS
Forabout30 secondsaftertheovenisturnedoff, anelectriccharge
remainsinthehigh voltagecapacitorsintheinverterpowersupply
circuitboard.
Whenreplacing orchecking parts, removethepowerplug fromthe
outlet and shorttheinverteroutputterminal ofthemagnetron
filamentterminalstothechassisground withaninsulatedhandle
screwdrivertodischarge. Please besuretotouchthechassis
ground sidefirst and thenshorttotheoutputterminals.
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Discharging thehigh voltagecapacitors
WARNING
Thereishigh voltagepresentwithhigh currentcapabilities inthe
circuits oftheprimaryand secondarywindings, choke coil and heat
sinkoftheinverter. Itisextremelydangeroustoworkon ornear
these circuits withtheovenenergized. DO NOTmeasurethevoltage
inthehigh voltagecircuitincluding thefilamentvoltageofthe
magnetron.
WARNING
Nevertouchanycircuitwiring withyourhand orwithaninsulated
tool during operation.
4.3. Partreplacement.
Whenanypartor componentistobereplaced, always ensurethatthepowercord isremoved
from thewall outlet.
4.4. Whenthe10Afuse isblownduetotheoperation oftheshort
switch:
WARNING
Whenthe10A250Vfuse isblownduetotheoperation ofthe
interlock monitorswitch, replace all ofthecomponents (primary
latchswitch, secondarylatchswitch, shortswitchand powerrelay
B(RY1)).
1. Thisismandatory. Referto“adjustments and measurements”for
thelocation ofthese switches.
2. Whenreplacing thefuse, confirm that ithas theappropriate rating
forthese models.
3. Whenreplacing faultyswitches, besurethemounting tabsarenot
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bent, brokenordeficientintheirabilitytoholdtheswitches.
4.5. Avoidinserting nails, wireetc. through anyholes intheunit
during operation.
Neverinsertawire, nail or anyothermetal objectthrough thelampholes on thecavityor any
holes or gaps, because suchobjectsmay workas anantennaand cause microwave leakage.
4.6. Confirm afterrepair
1. Afterrepairorreplacementofparts, make surethat thescrewsof
theoven, etc. areneitherloose normissing. Microwaves might
leak ifscrewsarenotproperlytightened.
2. Make surethat all electrical connectionsaretightbeforeinserting
theplug intothewall outlet.
3. Check formicrowaveenergyleakage. (Refertoprocedurefor
measuring microwaveenergyleakage).
CAUTIONMICROWAVE RADIATION
USE CAUTIONNOTTO BECOMEEXPOSEDTO RADIATIONFROM
THEMICROWAVE MAGNETRONOROTHERPARTSCONDUCTING
MICROWAVE ENERGY
IMPORTANTNOTICE
Thefollowing components havepotentialsabove2000Vwhilethe
appliance isoperated.
-Magnetron
-High voltagetransformer(Locatedon inverter(U))
-High voltagediodes (Locatedon inverter(U))
-High voltagecapacitors(Locatedon inverter(U))
Payspecial attention tothese areas.
Whentheappliance isoperatedwiththedoorhinges ormagnetron
fixedincorrectly, themicrowaveleakagecanexceedmorethan5mW
/cm2. Afterrepairorexchange, itisveryimportanttocheck ifthe
magnetron and thedoorhinges arecorrectlyinstalled.
4.7. Sharpedges
Caution
Please use caution whenunpacking, installing ormoving theunit,
as someexposededges maybesharptothetouchand cause injury
ifnothandledwithcare.
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5. DISASSEMBLYAND PARTSREPLACEMENT
PROCEDURE
5.1. Magnetron
1. Dischargehigh voltagecharge.
2. Remove1screw holding airguideA.
3. Remove1screw holding airguideF.
4. Remove1screw holding themistor.
5. Disconnect 2high voltageleadwires frommagnetron filament
terminals.
6. Remove4screwsholding themagnetron.
NOTE:
Afterreplacementofthemagnetron, tightenmounting screws
properlymaking surethereisno gapbetweenthewaveguideand
themagnetron topreventmicrowaveleakage.
CAUTION
Whenreplacing themagnetron, besurethe
antennagasketisinplace.
5.2. Digital programmercircuit(D.P.C)and membranekeyboard.
NOTE:
Beforehanding theD.P.Censurethat yourbodyisconnectedto
ground todischargeanyelectriccharge.
1. Disconnect all connectorsfromD.P.C.
2. Remove1screw holding escutcheon base and slidethe
escutcheon base upwardslightly.
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3. Remove1screw holding D.P.C.
4. Release lock ofconnectorCN6bypushing bothlevelstoinside
and pull themupward, and removeflat cableofmembrane
keyboard.
5. Separate D.P.Cboardfromtabson theescutcheon base and
removeD.P.Cboard.
To replace membranekey board
6. Pushtheupperpartofkeyboard(displaywindow portion)from
back ofescutcheon base and peel off escutcheon sheet and
membranekeyboardcompletelyfromescutcheon base.
NOTE:
1. Themembranekeyboardisattachedtotheescutcheon base with
doublefacedadhesivetape. Therefore, applying hotairsuchas
using ahairdryerisrecommendedforsmootherremoval. / 2. When
installing new membranekeyboard, make surethat thesurface of
escutcheon base iscleanedsufficientlysothat anyproblems
(shortedcontacts orunevensurface) canbeavoided. / 3. Alignment
position ofmembranekeyboardisas follows;/ Membranekey
board:Rightand upperedges / Escutcheon sheet:Rightand upper
edges
5.3. Low voltagetransformerand/orpowerrelays(RY1, RY2)
NOTE:
Besuretoground anystaticelectricchargebuiltup on yourbody
beforehandling theDPC.
(A)Using solderwick or adesoldering tool and 30Wsoldering iron, carefullyremove all solder
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from theterminal pinsofthelowvoltagetransformerand/or powerrelays.
NOTE:
Donotuse asoldering iron ordesoldering tool ofmorethan30
watts on DPCcontacts.
(B) Withall theterminal pinscleanedand separatedfrom DPCcontacts, remove thedefective
transformer/powerrelays making sureall terminal pinsareinsertedcompletely. Resolderall
terminal contactscarefully.
5.4. Fanmotor
1. Disconnect 2leadwires fromfanmotorterminals.
2. Remove1screw locatedon ovenattaching orifice assembly.
3. Removeorifice fromovenassembly.
4. Remove2screwsholding fanmotortoovenassembly.
5. Removefanbladefromthefanmotorshaft bypulling itstraight
out.
5.5. Doorassembly
1. RemovedoorCfromdoorEbycarefullypulling outwardstarting
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fromupperrighthand cornerusing aflat bladescrewdriver.
2. Separate doorEfromtabson doorAand removedoorA.
3. OpenDoorEat theopening angleofapproximately10°(Note:The
doorcannotberemovediftheopening angleisgreaterthan10°).
4. RemovethedoorEfromits hinges bypushing thedoorEupward
and out.
5. RemovedoorscreenBfromdoorA.
6. Removedoorkeyand doorkeyspring.
7. Place thedoor'slowerhingepinintothebottomhingehole.
8. Use yourleft index fingertosupportthedoor'slowerhingepin
whileguiding thedoor'supperhingepinintothetop hingehole.
9. Loweryourfingertoseat thedoorontothehinges.
10. Replace othercomponents.
NOTE:
Dooralignmentiscrucial. Ifdoorismisaligned, applypressureuntil
alignmentisachieved.
NOTE:
Afterreplacementofthedefectivecomponentparts ofthedoor,
reassemble, install, and perform microwaveleakagetest.
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5.6. Turntablemotor
1. Removethemotorcoverbycutting at thelocationsindicatedby
thearrowswithacutter.
NOTE:
Afterremoving themotorcover, besurethat cutportionsare
properlytrimmedorbenttotheinsidesothat no sharpedges will
beexposedtooutside.
2. Disconnect 2leadwires connectedtotheturntablemotor.
3. Removetheturntablemotorbyremoving screw.
NOTE:
Afterreplacing thenew turntablemotorand reconnecting thetwo
leadwires, reinstall themotorcoverbyrotating it180°, tucking the
tabsintothebase inthe2providedslots, thenscrew thesingle
tabtothebase using a4mm X6mm screw (notprovided). /
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5.7. Steamsensor
1. Disconnect connectorCN2fromdigital programmercircuitboard.
2. Disengagecatchhooks on sensorcovercfromorifice.
3. Removesteamsensorfromorifice.
NOTE:
Wheninstalling thesteamsensor, make surethat thedirection of
steamsensorisas showninfigure. /
5.8. Quartzheater(ForBrownModels)
1. Disconnect leadwires fromheaterterminals.
2. Remove2screwsholding heatersupports.
3. Removetheheaterbypulling itout.
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5.9. Inverterpowersupply
CAUTIONS
1.Always leave thegrounding plateinplace.
2.Always securelytightentheground screw
through thebottom ofthechassis(base).
3.Securelyconnect3leadwireconnectors.
4.Make suretheheatsinkhas enough space (gap)
from theoven. Take special carenottotouchany
leadwiretothealuminum heatsinkbecause itis
hot.
1. Remove cabinetouterpanel.
2. Remove thetheH.V.leadwirefrom magnetron terminals.
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3. Disconnect2connectorsfrom CN701 &CN702 on H.V.Inverter(U).
4. Remove 1screwholding grounding leadwire.
5. Remove 2screwsholding Inverterbrackettothebase.
6. Slide2locking tabsofInverterbracketatthebottom ofthebase indirection ofarrows.
7. Remove 2screwsholding H.V.InvertertoInverterbracket.
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