Panasonic NN-T793AF User manual

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

componenttest procedures.
3.2. Measurementofmicrowaveoutput
The output powerof the magnetron canbe determinedbyperforming IEC standardtest
procedures. However,due to the complexityof IEC testprocedures, itis recommendedto test
the magnetron using the simple method outlinedbelow.
NecessaryEquipment:
*1 literbeaker*Glass thermometer/ *Wristwatchorstopwatch
NOTE:
Check thelinevoltageunderload.Lowvoltagewill lowerthe
magnetron output. Take thetemperaturereadingsand heating time
as accuratelyas possible.
1. Fill thebeakerwithexactlyoneliteroftapwater.Stirthewater
using thethermometerand record thewater’stemperature.
(recordedas T1).
2. Place thebeakeron thecenterofglass tray. / Set theovenfor
High powerand heat itfor exactlyoneminute.
3. Stirthewateragainand readthetemperatureofthewater.
(recordedas T2).
4. Thenormal temperaturerise at High powerlevel for eachmodel,
isas shownintable.

TABLE(1L-1min.test)
RATED OUTPUT TEMPERATURERISE
1200W(IEC705-88) Min. 10.3°C
4. EXPLODEDVIEWAND PARTS LIST
5. PARTS LIST
NOTE:
1. Whenordering replacementpart(s), please use partnumber(s)
showninthispartlist.
Donotuse description ofthepart.
2. Importantsafetynotice:
Components identifiedbymarkhavespecial characteristics
importantfor safety.
Whenreplacing anyofthese components, use onlymanufacture’s
specifiedparts.
NOTE:
“A”parts aresuppliedbyMOD(Japan)
“F” parts aresuppliedbySIMMC (China)

Ref. No. PartNo. PartName& Description Pcs/Set Remarks
1F00068100HN CAUTION LABEL 1
2F00075X10AQP NAMEPLATE 1 T793AFQPQ
2F00075X10SQP NAMEPLATE 1 T783SFQPQ
2F00075X10QQP NAMEPLATE 1 T703QFQPQ
4F10014W00AP BASE 1
5F10084T00AP RUBBER FOOT 4
6F110D4W00BQP CABINETBODY(U) 1
7F200A5X20AP OVEN (U) 1
8F20555K00AP COVER 1
9F21315Y00AP PULLYSHAFT 1
10 F2177-F80 WASHER 1
11 F290D9330AP ROLLER RING (U) 1
12 F3020-1200 DOOR HOOK 1
14 F3136-1200 HOOK LEVER A 1
15 F31374650AP HOOK LEVER B 1
16 F31384650AP HOOK LEVER C 1
17 F400A4T10QP FAN MOTOR 1 AC240V, SINGLEPHASE, 50Hz
18 F40084T00AP FAN BLADE 1
19 F40254W00AP AIR GUIDEA 1
20 F40264W00AP AIR GUIDEB 1
21 F41444W00AP ORIFICE 1
22 F64508660AP SENSOR COVER B 1
24 F65434W00AP SENSOR COVER C 1
25 A607S4M00AP STEAMSENSOR 1
26 F612E4J50XN INCANDESCENTLAMP(U) 1 24V, 50Hz, 20W
27 J61424T00AP MICRO SWITCH 1 (PRIMARYLATCH SWITCH)(V-16G-3C25)
28 F61415U30XN MICRO SWITCH 1 (SECONDARYLATCH SWITCH)(KW3-0D-A(471))
31 F61785U30XN MICRO SWITCH 1 (SHORTSWITCH)(KW3-0T-A(375))
32 F606Y4V00XN H.V.INVERTER (U) 1
33 F65854W00AP INVERTER BRACKETA 1
34 2M261-M32G MAGNETRON 1
35 A62304210BP FUSE 1 10A/240V, 50Hz
37 F63265U30XN TURNTABLEMOTOR 1
38 F900C4W00QP AC CORD W/PLUG 1
39 F66624W00AP GROUNDING PLATE 1
40 XTWFA4+12T SCREW 4 FOR MAGNETRON
41 F90804W00AP CANOECLIP 1 FOR COVER
42 XTWFA4+12D SCREW 5 FOR CABINETBODY
43 XTTFA4+8BFZ SCREW 2 FOR CABINETBODYSIDE
44 J692Y4T00QP NOISE FILTER 1
6. DOORASSEMBLY

Ref. No. PartNo. PartName& Description Pcs/Set Remarks
D1 F3018-1200 DOOR KEYA 1
D2 F302A5X10AAP DOOR A(U) 1 T793AFQPQ
D2 F302A5X70SAP DOOR A(U) 1 T783SFQPQ
D2 F302A5X10QAP DOOR A(U) 1 T703QFQPQ
D3 F302K4W00AP DOOR E(U) 1
D4 F30215G10XN DOOR KEYSPRING 1
D5 F30854W00AP DOOR C 1
D6 F31454W00AP DOOR SCREEN A 1
D7 F31465X00SAP DOOR SCREEN B 1 T793AFQPQ, T703QFQPQ
D7 F31465X70BAP DOOR SCREEN B 1 T783SFQPQ
D8 F01729660JP CAUTION LABELB 1
7. WIRINGMATERIALS

Ref. No. PartNo. PartName& Description Pcs/Set Remarks
W1 F030A5T50QP LEAD WIREHARNESS 1
W2 F030E4W00CP H.V.LEAD WIRE 1
8. ESCUTCHEONBASE ASSEMBLY

Ref. No. PartNo. PartName& Description Pcs/Set Remarks
E1 F603L5X10QP D.P.CIRCUIT(AU) 1
E2 F630Y5X10SQP MEMBRANESWITCH (U) 1 T793AFQPQ, T703QFQPQ
E2 F630Y5X10BQP MEMBRANESWITCH (U) 1 T783SFQPQ
E3 F800L4W70AAP CONTROLPANEL(AU) 1 T793AFQPQ
E3 F800L4W70BAP CONTROLPANEL(AU) 1 T783SFQPQ
E3 F800L4W70QAP CONTROLPANEL(AU) 1 T703QFQPQ
E4 F82564W00AP DOOR OPENING LEVEL 1
E5 F81274W70AP BACK PANEL 1
E6 F807254W70AAP DOOR OPENING BUTTON 1 T793AFQPQ
E6 F807254W70SAP DOOR OPENING BUTTON 1 T783SFQPQ
E6 F807254W70QAP DOOR OPENING BUTTON 1 T703QFQPQ
E7 F80375K00AP COOK BUTTON SPRING 1
9. PACKINGAND ACCESORIES

Ref. No. PartNo. PartName& Description Pcs/Set Remarks
P1 F00035X10QP INSTRUCTION MANUAL 1
P2 F01025X10AQP PACKING CASE, PAPER 1 T793AFQPQ
P2 F01025X10SQP PACKING CASE, PAPER 1 T783SFQPQ
P2 F01025X10QQP PACKING CASE, PAPER 1 T703QFQPQ
P3 F01044W00AP UPPER FILLER 1
P4 F01054W00AP LOWER FILLER 1
P5 F01064W00AP P.E.BAG 1
P6 F01074W00AP DOOR SHEET 1
P7 B06014W00AP COOKING TRAY 1
P8 F01084W00AP TRAYPACKING 1
P9 F00065G40AP CAUTION LABEL 1
P10 F01924T00AP SHEET 1
P11 F00065T50QP CAUTION LABEL 1
INVERTER BOARD PARTSLIST(F606Y4V00XN)
Ref. No. PartNo. PartName& Description Pcs/Set Remarks
C701 AECQ2G104JC1 CAPACITOR 1 0.1 F, 500VDC
C702 ECQE2405T847 CAPACITOR 1 4 F, 250VDC
C703 AECQ2H454JC3 CAPACITOR 1 0.45 F, 500VDC
C704 , C705 ECWH30822JUA CAPACITOR 2 8200PF, 3000VDC
CN701 AEEMXH00703G CONNECTOR 1
D701 , D702 A62024V00GP DIODESI 2 0.3A
D703 AESSRCT1H7-E DIODESI 1
D704, D705 AESSRCT1A6-E DIODESI 2
D706 AESS133T-77 DIODESI 1 MA196, 0.1A
DB701 AESTRS2006M DIODESI 1 20A, 600V
XTWA3+12B SCREW 2 3*12 (FOR DB701, Q701)
XTNA3+12B SCREW 1 3*12 (FOR Q702)
H.S. F66914V00XN HEATSINK 1
IC702 , IC703 AEICP25011HL IC 2
IC801 AN9DB07SB-E1 IC 1
L701 F50204V00XN CHOKECOIL 1
Q701 A691E4V10GP TRANSISTOR SI 1
Q702 TRANSISTOR SI 1
C806 CAPACITOR 1 56PFTRANSISTOR(Q701, Q702) KIT
Q703, Q704 2SC2785TFK TRANSISTOR SI 2
Q705 2SA1175TFK TRANSISTOR SI 1
R715 AERGRY15J452 RESISTOR 1 4.5K , 15W
VR701 AEVTZ6TLT102 VARIABLERESISTOR 1 1K , 30%
ZD701, ZD703, ZD704, ZD705 AESZMTZJ10B ZENER DIODESI 4
ZD702 AESZMTZJ12C ZENER DIODESI 1
T701 F609A4V00XN H.V. TRANSFORMER 1 PBF
CT701 F66904V00XN CURRENTTRANSFORMER 1
10. DIGITALPROGRAMMERCIRCUIT

SCHEMATIC DIAGRAM

11. DIGITALPROGRAMMERCIRCUIT
PARTSLIST

Ref. No. PartNo. PartName& Description Pcs/Set Remarks
BZ310 AEFBAT2001 BUZZER 1 2.0KHz
C221, C484 AECUU06F103Z CHIPCAPACITOR 2 0.01 F/50V
C343 AECUU06C101J CHIPCAPACITOR 1 100PF/50V
C12, C222, C340, C440 AECUT06F104Z CHIPCAPACITOR 4 0.1 F/25V
C330 AECUU06R102K CHIPCAPACITOR 1 1000PF/50V
C481 AECUU06F473Z CHIPCAPACITOR 1 0.047 F/50V
C10 AECETK1V561B ALCHEMCAPACITOR 1 560 F/35V
C482 AECETS1H010B ALCHEMCAPACITOR 1 1 F/50V
C483 AECETS1HR47B ALCHEMCAPACITOR 1 0.47 F/50V
C485 AECETS1H2R2B ALCHEMCAPACITOR 1 2.2 F/50V
CN1 AEEMXH01505W CONNECTOR 1 5Pin
CN2 AEEMMF00703W CONNECTOR 1 3Pin
CN3 F03524U50AP CONNECTOR 1 3Pin
CN4 AEEMXH00F04W CONNECTOR 1 4Pin
CN6 AEEM09FDZBTM CONNECTOR 1 9Pin
CX320 AEFOS800MG06 CERAMIC RESONATOR 1 8.0MHz
DISP110 AEDDHJ4M00AP LCD 1
DISP1HOLDER F66175E40XN LCD HOLDER 1
F67525E40XN DIFFUSION SHEET 1
D10-D13 AESSRCT1A6-E DIODE 4
D40, D220, D221, D223 AESS133T-77 DIODE 4
D25 AERZ511KD10A VARISTOR 1
D26, D27 AERZ102KD10A VARISTOR 2
D180-D189 AESQPY1112H CHIP-LED 10
IC1 MN101C54CFA L.S.I 1
IC480 AEICUPC358G2 IC 1
Q226 AESA14EKE CHIPDIGI-TRANSISTOR 1
Q182, Q223, Q224 AESC23JKE CHIPDIGI-TRANSISTOR 3
Q10, Q180 2SD1859TV2Q TRANSISTOR 2
Q181, Q220, Q225 2SC2412KT146 CHIPTRANSISTOR 3
R182, R183 AERJ06J101R CHIPRESISTOR 2 100 , 1/16W, 5%
R224, R490, R492 AERJ06J103R CHIPRESISTOR 3 10K, 1/16W, 5%
R221, R228, R342, R343 AERJ06J104R CHIPRESISTOR 4 100K, 1/16W, 5%
R483, R484, R489 AERJ06J105R CHIPRESISTOR 3 1M, 1/16W, 5%
R485 AERJ06J154R CHIPRESISTOR 1 150K, 1/16W, 5%
R488, R491 AERJ06J202R CHIPRESISTOR 2 2K, 1/16W, 5%
R181, R227, R320 AERJ06J220R CHIPRESISTOR 3 22 , 1/16W, 5%
R220, R222, R223 AERJ06J222R CHIPRESISTOR 3 2.2K, 1/16W, 5%
R310 AERJ06J332R CHIPRESISTOR 1 3.3K, 1/16W, 5%
R330, R440 AERJ06J333R CHIPRESISTOR 2 33K, 1/16W, 5%
R487 AERJ06J433R CHIPRESISTOR 1 43K, 1/16W, 5%
R331, R441 AERJ06J471R CHIPRESISTOR 2 470 , 1/16W, 5%
R360, R480, R481 AERJ06J472R CHIPRESISTOR 3 4.7K, 1/16W, 5%
R486 AERJ06J684R CHIPRESISTOR 1 680K, 1/16W, 5%
R10, R11, R311 AERDY2TJ102T CARBON RESISTOR 3 1K, 1/4W, 5%
R12, R180 AERDY2TJ103T CARBON RESISTOR 2 10K, 1/4W, 5%
R290 AERDY2TJ104T CARBON RESISTOR 1 100K, 1/4W, 5%
RY1 AEGG5G1A18 POWER RELAY 1
RY2 AEBJQ1A18 POWER RELAY 1
T10 AETP5L00QP LOWVOLTAGE
TRANSFORMER 1