Panasonic NN-V653WF Manuale utente

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

1. SCHEMATICDIAGRAM(FORGRILL MODELS)

2. SCHEMATICDIAGRAM(FORSOLO MODELS)

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

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

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.

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.

Questo manuale è adatto per i seguenti modelli

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