Panasonic NN-T793AF Manuale utente

ORDERNO.SIMMC 0305020A3

MicrowaveOven

NN-T793AF / NN-T783SF / NN-T703QF

QPQ(Australia&NewZealand)

Please fileand use thismanual togetherwiththeservice manual for

Model NN-S560WF(ORDERNO. SIMMC0006012C3)

SPECIFICATIONS

2003 Shanghai Matsushita MicrowaveOvenCo., Ltd. / All

rights reserved. Unauthorizedcopying and distribution isa

violation oflaw.

1. SCHEMATICDIAGRAM

2. CAUTIONS TO BE OBSERVEDWHEN

TROUBLESHOOTING

Unlike manyotherappliances, the microwave ovenis a high voltage, high current device. Itis

free from dangerinordinaryuse, though extreme care shouldbe takenduring repair.

Caution

Servicemenshouldremovetheirwatches wheneverworking close

toor replacing themagnetron.

2.1. Check thegrounding

Donot operate on a twowire extension cord. The microwave ovenis designedto be grounded

whenused. Itis imperative, therefore, to ensure the appliance is properlygroundedbefore

beginning repairwork.

2.2. Inverterwarnings

DANGER, HIGH VOLTAGEAND HIGH TEMPERATURE(HOT/LINE)OF THEINVERTER POWER

SUPPLY(U)

Thishigh voltageinverterpowersupplyhandles veryhigh voltage

and currentfor themagnetron tube. Though itisfree from danger

inordinaryuse, extremecareshouldbetakenduring repair.

Thealuminum heat sinkisalsoenergizedwithhigh voltage(HOT),

sodo nottouchwhentheACinputterminalsareenergized. The

powerdevices Collector isdirectlyconnectedtothealuminum heat

sink.

Thealuminum heat sinkmaybeHOTduetoheat energy, therefore,

extremecareshouldbetakenduring servicing.

H.V. Inverterwarning

WARNINGFOR INVERTER POWER SUPPLY(U)GROUNDING

Check thehigh voltageinverterpowersupplycircuitgrounding.

Thehigh voltageinverterpowersupplycircuitboard must havea

properchassisground, theinvertergrounding bracket must be

connectedtothechassis. Iftheinverterboard isnotgroundedit

will expose theusertoveryhigh voltages and cause extreme

DANGER!Besurethat theinvertercircuitisproperlygroundedvia

theinverterearthbracket.

Grounding of the invertercircuitboard

WARNING!DISCHARGETHEHIGH VOLATGECAPACITORS

For about30 secondsaftertheovenisturnedoff, anelectric

chargeremainsinthehigh voltagecapacitorsintheinverterpower

supplycircuitboard.

Whenreplacing or checking parts, removethepowerplug from the

outlet and shorttheinverteroutputterminal ofthemagnetron

filamentterminalstothechassisground withaninsulatedhandle

screwdrivertodischarge. Please besuretotouchthechassis

ground sidefirst and thenshorttotheoutputterminals.

Discharging the high voltage capacitors

WARNING

Thereishigh voltagepresentwithhigh currentcapabilities inthe

circuits oftheprimaryand secondarywindings, choke coil and

heat sinkoftheinverter. Itisextremelydangeroustoworkon or

nearthese circuits withtheovenenergized. DO NOTmeasurethe

voltageinthehigh voltagecircuitincluding thefilamentvoltageof

themagnetron.

WARNING

Nevertouchanycircuitwiring withyour hand or withaninsulated

tool during operation.

2.3. Partreplacement.

Whenanypartorcomponent is to be replaced, always ensure thatthe powercordis removed

from the wall outlet.

2.4. Whenthe10Afuse isblownduetotheoperation oftheshort

switch:

WARNING

Whenthe10A250V fuse isblownduetotheoperation ofthe

interlock monitor switch, replace all ofthecomponents (primary

latchswitch, door switch, shortswitchand powerrelayB(RY1)).

1. Thisismandatory. Referto“adjustments and measurements”for

thelocation ofthese switches.

2. Whenreplacing thefuse, confirm that ithas theappropriate rating

for these models.

3. Whenreplacing faultyswitches, besurethemounting tabsare

notbent, brokenor deficientintheirabilitytoholdtheswitches.

2.5. Avoidinserting nails, wireetc. through anyholes intheunit

during operation.

Neverinserta wire, nail oranyothermetal objectthrough the lamp holes on the cavityorany

holes orgaps, because suchobjects maywork as anantenna and cause microwave leakage.

2.6. Confirm afterrepair

1. Afterrepairor replacementofparts, make surethat thescrewsof

theoven, etc. areneitherloose nor missing. Microwaves might

leak ifscrewsarenotproperlytightened.

2. Make surethat all electrical connectionsaretightbeforeinserting

theplug intothewall outlet.

3. Check for microwaveenergyleakage. (Refertoprocedurefor

measuring microwaveenergyleakage).

CAUTION MICROWAVE RADIATION

USE CAUTIONNOTTO BECOME EXPOSEDTO RADIATIONFROM

THE MICROWAVE MAGNETRONOROTHERPARTS CONDUCTING

MICROWAVE ENERGY

IMPORTANTNOTICE

Thefollowing components havepotentialsabove2000V whilethe

appliance isoperated.

-Magnetron

-High voltagetransformer(Locatedon inverter(U))

-High voltagediodes (Locatedon inverter(U))

-High voltagecapacitors(Locatedon inverter(U))

Payspecial attention tothese areas.

Whentheappliance isoperatedwiththedoor hinges or magnetron

fixedincorrectly, themicrowaveleakagecanexceedmorethan

5mW/cm2. Afterrepairor exchange, itisveryimportanttocheck if

themagnetron and thedoor hinges arecorrectlyinstalled.

2.7. Sharp edges

Caution

Please use caution whenunpacking, installing or moving theunit,

as someexposededges maybesharp tothetouchand cause

injuryifnothandledwithcare.

3. MEASUREMENTS AND ADJUSTMENTS

3.1. Adjustmentofprimarylatchswitch, secondarylatchswitchand

shortswitch.

1. MountthePrimarylatchswitch, thesecondarylatchswitchand

theshortswitchtothedoor hookassemblyas showninILL.

NOTE:

Nospecificindividual adjustmentduring installation ofthe

Primarylatchswitch, secondarylatchswitchor shortswitchto

thedoor hookarerequired.

2. Whenmounting thedoor hookassemblytotheovenassembly,

adjust thedoor hookassemblybymoving itinthedirection ofthe

arrowsintheillustration, sothat theovendoor will nothaveany

playinit. Check for playinthedoor bypulling thedoor assembly.

Make surethat thelatchkeysmovesmoothlyafteradjustmentis

completed. Completelytightenthescrewsholding thedoor hook

assemblytotheovenassembly.

3. Reconnect theshortswitchand check thecontinuityofthe

monitor circuitand all latchswitches againbyfollowing the

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