Sanyo EM-CD2900UK User manual

(a)Do  not  operate  or  allow  the  oven  to  be  operated  with  the  door  open.
(b)Makethefollowingsafetychecksonallovenstobeservicedbeforeactivatingthemagnetronorother
microwavesource,andmakerepairsasnecessary:
(1)Interlockoperation,(2)properdoorclosing,(3)sealandsealingsurfaces(arcing,wear,andother
damage),(4)damagetoorlooseningofhingesandlatches,(5)evidenceofdroppingorabuse.
(c)Beforeturningonmicrowavepowerforanyservicetestorinspectionwithinthemicrowavegenerating
compartments,checkthemagnetron,waveguideortransmissionline,andcavityforproperalignment,
integrity,andconnections.
(d)Anydefectiveormisadjustedcomponentsintheinterlock,monitor,doorseal,andmicrowavegeneration
generationandtransmissionsystemsshallberepairedreplaced,oradjustedbyproceduresdescribe
inthismanualbeforetheovenisreleasedtotheowner.
REFERENCENO.REFERENCENO.
REFERENCENO.REFERENCENO.
REFERENCENO.SM‑6310034‑00
ForewordForeword
ForewordForeword
Foreword
ReadRead
ReadRead
Read



thisthis
thisthis
this



manualmanual
manualmanual
manual



carefully,especiallycarefully,especially
carefully,especiallycarefully,especially
carefully,especially



precautionprecaution
precautionprecaution
precaution



on microwave energy,andon microwave energy,and
on microwave energy,andon microwave energy,and
on microwave energy,and



followfollow
followfollow
follow



thethe
thethe
the



procedureprocedure
procedureprocedure
procedure
strictly,carelessstrictly,careless
strictly,carelessstrictly,careless
strictly,careless



servicingservicing
servicingservicing
servicing



andand
andand
and



testingtesting
testingtesting
testing



maymay
maymay
may



exposeexpose
exposeexpose
expose



yourselfyourself
yourselfyourself
yourself



toto
toto
to



thethe
thethe
the



microwavemicrowave
microwavemicrowave
microwave



energyenergy
energyenergy
energy



leakage.leakage.
leakage.leakage.
leakage.
Pro.CodeNo.ModelNo.
43764400EM‑CD2900UK
EM‑CD2900(UK)EM‑CD2900(UK)
EM‑CD2900(UK)EM‑CD2900(UK)
EM‑CD2900(UK)
SERVICESERVICE
SERVICESERVICE
SERVICE



MANUALMANUAL
MANUALMANUAL
MANUAL



RoHSRoHS
RoHSRoHS
RoHS
ThisproductdoesnotcontainanyhazardoussubstancesprohibitedbytheRoHSDirective.
(YouwillfindRorZatthelastdigitofserialnumberoraRSFlabelneartheratingplateon
theRoHScomplaintproduct.)



WARNINGWARNING
WARNINGWARNING
WARNING
YouarerequestedtouseRoHScompliantpartsformaintenanceorrepair.
Youarerequestedtouselead‑freesolder.
PRECAUTIONSPRECAUTIONS
PRECAUTIONSPRECAUTIONS
PRECAUTIONS
PRECAUTIONSPRECAUTIONS
PRECAUTIONSPRECAUTIONS
PRECAUTIONS



TOTO
TOTO
TO



BEBE
BEBE
BE



OBSERVEDOBSERVED
OBSERVEDOBSERVED
OBSERVED



BEFOREBEFORE
BEFOREBEFORE
BEFORE



ANDAND
ANDAND
AND



DURINGDURING
DURINGDURING
DURING



SERVICINGSERVICING
SERVICINGSERVICING
SERVICING



TOTO
TOTO
TO



AVOIDAVOID
AVOIDAVOID
AVOID



POSSIBLEPOSSIBLE
POSSIBLEPOSSIBLE
POSSIBLE
EXPOSUREEXPOSURE
EXPOSUREEXPOSURE
EXPOSURE



TOTO
TOTO
TO



EXCESSIVEEXCESSIVE
EXCESSIVEEXCESSIVE
EXCESSIVE



MICROWAVEMICROWAVE
MICROWAVEMICROWAVE
MICROWAVE



ENERGYENERGY
ENERGYENERGY
ENERGY
COMMERCIALCOMMERCIAL
COMMERCIALCOMMERCIAL
COMMERCIAL



USEUSE
USEUSE
USE



COMBINATIONCOMBINATION
COMBINATIONCOMBINATION
COMBINATION
MICROWAVEMICROWAVE
MICROWAVEMICROWAVE
MICROWAVE



OVENOVEN
OVENOVEN
OVEN

‑1‑
‑TABLEOFCONTENTS‑‑TABLEOFCONTENTS‑
‑TABLEOFCONTENTS‑‑TABLEOFCONTENTS‑
‑TABLEOFCONTENTS‑
1.AdjustmentProcedures.................1
2.Specifications........................2
3.PoweroutputMeasurement..............2
4.PrecautionsandRepairServiceTips...2
5.OvenControlPanel....................3
6.CircuitDiagram.......................4
7.TestProceduresandTroubleshooting...5‑14
8.DisassemblyInstructions.............15‑22
9.ExplodedViewandPartsList.........23‑30
10.OverallCircuitDiagram..............31‑32
11.ControlCircuitDiagram.................33
PRIMARYINTERLOCKSWITCH,INTERLOCKMONITORPRIMARYINTERLOCKSWITCH,INTERLOCKMONITOR
PRIMARYINTERLOCKSWITCH,INTERLOCKMONITORPRIMARYINTERLOCKSWITCH,INTERLOCKMONITOR
PRIMARYINTERLOCKSWITCH,INTERLOCKMONITOR
SWITCHANDDOORSENSINGSWITCHADJUSTMENTSWITCHANDDOORSENSINGSWITCHADJUSTMENT
SWITCHANDDOORSENSINGSWITCHADJUSTMENTSWITCHANDDOORSENSINGSWITCHADJUSTMENT
SWITCHANDDOORSENSINGSWITCHADJUSTMENT
(Figure1)
(5)Makesuretheinterlockmonitorswitch
opensbeforetheprimaryinterlockswitch
closeswhenthedoorisclosedveryslowly,
accordingtoCHECKOUTPROCEDUREFOR
SWITCHESonpage8.
(6)Makesurethemicrowaveenergyleakageshould
benogreaterthan5mW/cm2toallowto
measurementuncertaintywhenmeasuredwith
adetector.
(Allserviceadjustmentsmustbemadefor
minimummicrowaveenergyleakagereadings.)
NOTE:Iftheinterlockmonitorcircuitop‑
erateandatthesametimethefuse
blowswiththedooropened,besure
toreplacetherelaycircuitboard
becauserelay3and4onthecontrol
circuitboard,thedoorsensingswitch
andtheelectriccircuitrelatedon
thedoorsensingswitch,whichactas
SecondaryInterlockswitch.
( 1)Loosen2screwssecuringtheleverstop‑
per.
(2)Adjusttheleverstopperpositionsothat
itispushedupandpullbackwarduntil
thereisaboutzerogapbetweenthelatch
leverandtheswitchbodyonthedoor
primaryinterlockswitchandtheatthe
sametimethereisaboutzerogapbetween
latchleverandtheswitchbodyonthe
doorsensingswitchwhenthedoorlatch
issecurelylocked.
(3)Tightentheleverstopperscrewssecurely.
(4)Makesuretheinterlockmonitorswitch
closesaftertheprimaryinterlockswitch
opensthedoorisopenedveryslowly,
accordingtoCHECKOUTPROCEDUREFOR
SWITCHESonpage8.
NC
NOC
NC
NOC
NC NO C
Lever stopper
Interlock montor
switch
Latch lever
Door sensing
switch
Screws
Latch lever
Primary Interlock switch


CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
MICROWAVERADIATIONMICROWAVERADIATION
MICROWAVERADIATIONMICROWAVERADIATION
MICROWAVERADIATION
PERSONNELSHOULDNOTBEEXPOSEDTOTHEPERSONNELSHOULDNOTBEEXPOSEDTOTHE
PERSONNELSHOULDNOTBEEXPOSEDTOTHEPERSONNELSHOULDNOTBEEXPOSEDTOTHE
PERSONNELSHOULDNOTBEEXPOSEDTOTHE
MICROWAVEENERGYWHICHMAYRADIATEFROMMICROWAVEENERGYWHICHMAYRADIATEFROM
MICROWAVEENERGYWHICHMAYRADIATEFROMMICROWAVEENERGYWHICHMAYRADIATEFROM
MICROWAVEENERGYWHICHMAYRADIATEFROM
THEMAGNETRONOROTHERMICROWAVEGENERAT‑THEMAGNETRONOROTHERMICROWAVEGENERAT‑
THEMAGNETRONOROTHERMICROWAVEGENERAT‑THEMAGNETRONOROTHERMICROWAVEGENERAT‑
THEMAGNETRONOROTHERMICROWAVEGENERAT‑
INGDEVICEIFITISIMPROPERLYUSEORINGDEVICEIFITISIMPROPERLYUSEOR
INGDEVICEIFITISIMPROPERLYUSEORINGDEVICEIFITISIMPROPERLYUSEOR
INGDEVICEIFITISIMPROPERLYUSEOR
CONNECTED.CONNECTED.
CONNECTED.CONNECTED.
CONNECTED.
ALLINPUTMICROWAVECONNECTIONS,WAVEGUIDE,ALLINPUTMICROWAVECONNECTIONS,WAVEGUIDE,
ALLINPUTMICROWAVECONNECTIONS,WAVEGUIDE,ALLINPUTMICROWAVECONNECTIONS,WAVEGUIDE,
ALLINPUTMICROWAVECONNECTIONS,WAVEGUIDE,
FLANGES,ANDGASKETSMUSTBESECURE.NEVERFLANGES,ANDGASKETSMUSTBESECURE.NEVER
FLANGES,ANDGASKETSMUSTBESECURE.NEVERFLANGES,ANDGASKETSMUSTBESECURE.NEVER
FLANGES,ANDGASKETSMUSTBESECURE.NEVER
OPERATETHEDEVICEWITHOUTAMICROWAVEOPERATETHEDEVICEWITHOUTAMICROWAVE
OPERATETHEDEVICEWITHOUTAMICROWAVEOPERATETHEDEVICEWITHOUTAMICROWAVE
OPERATETHEDEVICEWITHOUTAMICROWAVE
ENERGYABSORBINGLOADATTACHED.NEVERLOOKENERGYABSORBINGLOADATTACHED.NEVERLOOK
ENERGYABSORBINGLOADATTACHED.NEVERLOOKENERGYABSORBINGLOADATTACHED.NEVERLOOK
ENERGYABSORBINGLOADATTACHED.NEVERLOOK
INTOANOPENWAVEGUIDEORANTENNAWHILEINTOANOPENWAVEGUIDEORANTENNAWHILE
INTOANOPENWAVEGUIDEORANTENNAWHILEINTOANOPENWAVEGUIDEORANTENNAWHILE
INTOANOPENWAVEGUIDEORANTENNAWHILE
THEDEVICEISENERGIZED.THEDEVICEISENERGIZED.
THEDEVICEISENERGIZED.THEDEVICEISENERGIZED.
THEDEVICEISENERGIZED.
1.ADJUSTMENTPROCEDURES1.ADJUSTMENTPROCEDURES
1.ADJUSTMENTPROCEDURES1.ADJUSTMENTPROCEDURES
1.ADJUSTMENTPROCEDURES
TOAVOIDPOSSIBLEEXPOSURETOMICROWAVETOAVOIDPOSSIBLEEXPOSURETOMICROWAVE
TOAVOIDPOSSIBLEEXPOSURETOMICROWAVETOAVOIDPOSSIBLEEXPOSURETOMICROWAVE
TOAVOIDPOSSIBLEEXPOSURETOMICROWAVE
ENERGYLEAKAGE,THEFOLLOWINGADJUSTMENTSENERGYLEAKAGE,THEFOLLOWINGADJUSTMENTS
ENERGYLEAKAGE,THEFOLLOWINGADJUSTMENTSENERGYLEAKAGE,THEFOLLOWINGADJUSTMENTS
ENERGYLEAKAGE,THEFOLLOWINGADJUSTMENTS
OFTHEINTERLOCKSWITCHESSHOULDBEMADEOFTHEINTERLOCKSWITCHESSHOULDBEMADE
OFTHEINTERLOCKSWITCHESSHOULDBEMADEOFTHEINTERLOCKSWITCHESSHOULDBEMADE
OFTHEINTERLOCKSWITCHESSHOULDBEMADE
ONLYBYAUTHORIZEDSERVICEPERSONNEL.ONLYBYAUTHORIZEDSERVICEPERSONNEL.
ONLYBYAUTHORIZEDSERVICEPERSONNEL.ONLYBYAUTHORIZEDSERVICEPERSONNEL.
ONLYBYAUTHORIZEDSERVICEPERSONNEL.
Figure1

‑2‑
(1)Beforethepowerisapplied.
(a)Openandclosedoorseveraltimesto
makesurethedoorinterlockswitch
andinterlockmonitorswitchoperation
properly.(Listenfortheclickingsound
fromswitches.)Makesuretheinter‑
lockmonitorswitchisclosedafter
thelatchinterlockswitchisopenwhen
thedoorisopened.
(Seepages1and6)
(b)Makesuretheperforatedscreenand
thechokedielectricofthedoorare
correctlymounted.
(2)Afterthepowerisapplied.
(a)Openandclosethedoortoseeifthe
interlockmechanismoperatesproperly.
(b)Checkmicrowaveenergyleakagewitha
leakagedetectorandconfirmtheen‑
ergyleakageisbelow5mW/cm2.
(3)Donotoperatetheunituntilitis
completelyrepairedifanyofthefollowing
conditionsexists.
(a)Doorisnotclosedfirmlyagainstthe
cavityfront.
(b)Thehingeisbroken.
(c)Thechokedielectricorthedoorseal
isdamaged.
(d)Thedoorisbentorwarped,orthereis
anyothervisibledamagetotheoven
thatmaycausemicrowaveenergyleak‑
age.
Note:Alwayskeepthesealclean.
(e)Makesurethattherearenodefective
partsintheinterlockmechanism.
(f)Makesurethattherearenodefective
partsinthemicrowavegeneratingand
transmissionassembly.
(especiallywaveguide)
(4)Folowingitemsshouldbecheckedafter
theunitisrepaired.
(a)Theinterlockmonitorswitchiscon‑
nectedcorrectlyandfirmly.
(b)Themagnetrongasketonthemagnetron
isproperlypositioned.
(c)Waveguideandovencavityareintact.
(Noleakageofmicrowaveenergy).
(d)Thedoorcanbeproperlyclosedandthe
safetyswitchesworkproperly.
(e)Theovenmustbestoppedwhenthedoor
isopenedorthetimeisup.
Theovenmustnotbeoperatedwithanyofthe
abovecomponentsremovedorbypassed.
3.MICROWAVEPOWEROUTPUTMEASUREMENT3.MICROWAVEPOWEROUTPUTMEASUREMENT
3.MICROWAVEPOWEROUTPUTMEASUREMENT3.MICROWAVEPOWEROUTPUTMEASUREMENT
3.MICROWAVEPOWEROUTPUTMEASUREMENT
(1)Prepare1000±5gtapwater.
(2)Adjustwatertemperatureto10±2℃.
(3)Pourwaterintoacontainermadeofboro‑
silicateGlass,190mmouterdiameter
cylinder,maximum3mmthickness.
Note:Usethecontainerkeptontheroom
temperature.
(4)Placethecontainerinthecenterofthe
ovencavity.
(5)Settheheatingtimefor54secondsand
ratingfullpowerandthenstartmicrowave
oven.
(6)Takethecontaineroutimmediatelywhenheat‑
ingtimeisup.
(7)Stirwaterformakingevenwatertempera‑
tureinthecontainer.
(8)Measurewatertemperature.
Watertemperatureriseshouldbebetween
8℃to12℃forcorrectpoweroutput.
(9)ForcorrectPoweroutputmeasurement,theline
voltageunderroadmustbe230+2volts.
4.PRECAUTIONSANDREPAIR‑SERVICETIPS4.PRECAUTIONSANDREPAIR‑SERVICETIPS
4.PRECAUTIONSANDREPAIR‑SERVICETIPS4.PRECAUTIONSANDREPAIR‑SERVICETIPS
4.PRECAUTIONSANDREPAIR‑SERVICETIPS
PRELIMINARYPRELIMINARY
PRELIMINARYPRELIMINARY
PRELIMINARY
A.SINCENEARLY4,000VOLTSEXISTSINSOMEA.SINCENEARLY4,000VOLTSEXISTSINSOME
A.SINCENEARLY4,000VOLTSEXISTSINSOMEA.SINCENEARLY4,000VOLTSEXISTSINSOME
A.SINCENEARLY4,000VOLTSEXISTSINSOME
CIRCUITSOFTHISMICROWAVEOVEN,REPAIRCIRCUITSOFTHISMICROWAVEOVEN,REPAIR
CIRCUITSOFTHISMICROWAVEOVEN,REPAIRCIRCUITSOFTHISMICROWAVEOVEN,REPAIR
CIRCUITSOFTHISMICROWAVEOVEN,REPAIR
SHOULDBECARRIEDOUTWITHGREATCARE.SHOULDBECARRIEDOUTWITHGREATCARE.
SHOULDBECARRIEDOUTWITHGREATCARE.SHOULDBECARRIEDOUTWITHGREATCARE.
SHOULDBECARRIEDOUTWITHGREATCARE.
B.TOAVOIDPOSSIBLEEXPOSURETOMICROWAVEB.TOAVOIDPOSSIBLEEXPOSURETOMICROWAVE
B.TOAVOIDPOSSIBLEEXPOSURETOMICROWAVEB.TOAVOIDPOSSIBLEEXPOSURETOMICROWAVE
B.TOAVOIDPOSSIBLEEXPOSURETOMICROWAVE
ENERGYLEAKAGE,THEFOLLOWINGPRECAUTIONSENERGYLEAKAGE,THEFOLLOWINGPRECAUTIONS
ENERGYLEAKAGE,THEFOLLOWINGPRECAUTIONSENERGYLEAKAGE,THEFOLLOWINGPRECAUTIONS
ENERGYLEAKAGE,THEFOLLOWINGPRECAUTIONS
MUSTBETAKENBEFORESERVICING.MUSTBETAKENBEFORESERVICING.
MUSTBETAKENBEFORESERVICING.MUSTBETAKENBEFORESERVICING.
MUSTBETAKENBEFORESERVICING.
HINTFORLAMPCHANGE
Beforeremovingthebulbaccesspanel,pull
outthemainplug.Changethefaultybulb
andsecurethebulbaccesspanel.Plugthe
cordbackinandcheckoperation.
Microwave1200W
Heater1300W
Combi2500W
800W
2,450MHz±50MHz
230V,50Hz
5.5±10%AmpsMicro
(After15mins.)
5.6±10％AmpsHeater
（After 15mins.)
11.0±10%AmpsCombi
(After15mins.)
ThermalProtectorfor
Magnetron,Openat140℃
ThermalProtectorfor
cavity,Openat195℃
Fuse(CartridgeType15A)
Thermistor
Primaryinterlock
Switch,DoorSensing
Switch,Interlock
MonitorSwitch
ElectricDigital
Combi,Micro20min.
Grill10min.
Heater,150℃‑250℃
Combi,150℃‑250℃
520(W)x460(D)x313(H)mm
330(W)x330(S)x165(H)mm
19.0liters
29.5kg
RatedPowerConsumption..
Microwaveoutput.........
Frequency................
Powersupply.............
Ratedcurrent............
SafetyDevice............
Timer....................
OvenTemperatureControl..
OverallDimensions.......
Ovencavitysize.........
EffectiveCapacityofOvenCavity...
Netweight...............
2.SPECIFICATIONS2.SPECIFICATIONS
2.SPECIFICATIONS2.SPECIFICATIONS
2.SPECIFICATIONS

‑3‑
5.OVENCONTROLPANEL5.OVENCONTROLPANEL
5.OVENCONTROLPANEL5.OVENCONTROLPANEL
5.OVENCONTROLPANEL
 &+52.#;5
%QQMKPIVKOG
1X GPVGORGTCVWTG
+PFKECVGUOKETQYCXGRQYGT
NGXGNU
2TQITCOOKPIPWODGT
5VCIG*GCVKPI+PFKECVQT
*GCVOQFG+PFKECVQT
)KXGUPQVKEGVJCVKVKUOKETQYCXG
QRGTCVKPIVKOGVQPGGFOCKPVG
PCPEG 2NGCUGECNNCUGTXKEGGPIK
PGGTVQIGVOQTGKPHQTOCVKQP
 2TQITCOOCDNG0QRNWU6GPMG[
(QTUGVVKPIVJGRTQITCOPWODGTHTQO
VQ
GI9JGPEJQQUKPIVJGRTQITCOPWODGT
QT
2TQITCO
2TQITCO 
 2TQITCO5GNGEVKQP-G[U6GPMG[
6JGWPKVKUTGCF[VQDGIKPQRGTCVKQPCUUQQP
CUVJGJGCVKPIVKOGJCUDGGPRTQITCOOGF
WUKPIVJGUGVGPMG[UPWODGTGFVQ
6JGVKOGUGNGEVGFYKNNDGFKURNC[GFCPF
EQWPVFQYPCHVGTVJGRTQEGUUKUDGIWP
(QTFGVGTOKPKPIRQYGTQWVRWVCPFEQQMKPI
VKOGFWTKPIRTQITCOOKPI
 %1/$+0#6+10MG[
5GNGEV%QODKPCVKQPOQFG
2TGUUQPEG1XGP/KETQYCXG
2TGUUVYKEG)TKNN/KETQYCXG
 /+%419#8'MG[
5GNGEV/KETQYCXGOQFG
 18'0MG[
5GNGEV1XGPOQFG
 )4+..MG[
5GNGEV)TKNNOQFG
 #76124'*'#6MG[
5GNGEV2TGJGCVOQFG
6JGQXGPECXKV[KUOCKPVCKPGFCVVJGUGV
VGORGTCVWTG
 /'/14;MG[
+PRWVFCVCHQTRTQITCOEQQMKPI
  %.'#4MG[
(QTECPEGNNKPIUGVVKPIKPVGTTWRVKPIVJG
UGVVKPIRTQEGUUYJGPCOKUVCMGJCUDGGP
OCFGQTUVQRRKPIEQQMKPIDGHQTGVJG
EQORNGVKQPQHVJGEQQMKPIRTQEGUU
 56#46MG[
(QTUVCTVKPIVKOGTEQQMKPI
(QTTGUVCTVCEQQMKPI
(QTTGUVCTVCHVGTRTGJGCV
 .#/2MG[
2TGUUVQVWTPVJGKPVGTKQTNCORQP
+VNKIJVUCWVQOCVKECNN[HQTHKXGUGEQPFU
 5'6MG[
+PRWVEQPVGPVKUFGEKFGFCPFUVCTVPGZVKPRWV
RTQEGUU
 %QPVTQN-PQD
7UGVJKUMPQDVQUGNGEVCQXGP6GOR
/KETQYCXG2QYGTEQQMKPIVKOGKVGO
`















‑4‑
6.CIRCUITDIAGRAM6.CIRCUITDIAGRAM
6.CIRCUITDIAGRAM6.CIRCUITDIAGRAM
6.CIRCUITDIAGRAM
*Caution:Thevoltagebetweenfilamentleadsofmagnetronisabout3.3VA.C,butthe
filamentcarries4KVD.Chighvoltagewithrespecttogrand.Nevertouchtheselead
withbarehandduringoperation.
Figure2

‑5‑
7.TESTPROCEDURESANDTROUBLESHOOTING7.TESTPROCEDURESANDTROUBLESHOOTING
7.TESTPROCEDURESANDTROUBLESHOOTING7.TESTPROCEDURESANDTROUBLESHOOTING
7.TESTPROCEDURESANDTROUBLESHOOTING
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
‑DISCONNECTTHEPOWERSUPPLYCORDFROMTHEWALL‑DISCONNECTTHEPOWERSUPPLYCORDFROMTHEWALL
‑DISCONNECTTHEPOWERSUPPLYCORDFROMTHEWALL‑DISCONNECTTHEPOWERSUPPLYCORDFROMTHEWALL
‑DISCONNECTTHEPOWERSUPPLYCORDFROMTHEWALL
OUTLETWHENEVERRMOVINGTHECABINETFROMTHEOUTLETWHENEVERRMOVINGTHECABINETFROMTHE
OUTLETWHENEVERRMOVINGTHECABINETFROMTHEOUTLETWHENEVERRMOVINGTHECABINETFROMTHE
OUTLETWHENEVERRMOVINGTHECABINETFROMTHE
UNIT.UNIT.
UNIT.UNIT.
UNIT.
PROCEEDWITHTESTSONLYAFTERDISCHARGINGTHEPROCEEDWITHTESTSONLYAFTERDISCHARGINGTHE
PROCEEDWITHTESTSONLYAFTERDISCHARGINGTHEPROCEEDWITHTESTSONLYAFTERDISCHARGINGTHE
PROCEEDWITHTESTSONLYAFTERDISCHARGINGTHE
HIGHVOLTAGECAPACITORANDREMOVINGTHELEADHIGHVOLTAGECAPACITORANDREMOVINGTHELEAD
HIGHVOLTAGECAPACITORANDREMOVINGTHELEADHIGHVOLTAGECAPACITORANDREMOVINGTHELEAD
HIGHVOLTAGECAPACITORANDREMOVINGTHELEAD
WIRESONTHEPRIMARYWINDINGOFTHEHIGHVOL‑WIRESONTHEPRIMARYWINDINGOFTHEHIGHVOL‑
WIRESONTHEPRIMARYWINDINGOFTHEHIGHVOL‑WIRESONTHEPRIMARYWINDINGOFTHEHIGHVOL‑
WIRESONTHEPRIMARYWINDINGOFTHEHIGHVOL‑
TAGETRANSFORMER.(SEEFIGURE3)TAGETRANSFORMER.(SEEFIGURE3)
TAGETRANSFORMER.(SEEFIGURE3)TAGETRANSFORMER.(SEEFIGURE3)
TAGETRANSFORMER.(SEEFIGURE3)
Primary
Winding
Figure5
Figure4
COMPONENTCOMPONENT
COMPONENTCOMPONENT
COMPONENT
MAGNETRONMAGNETRON
MAGNETRONMAGNETRON
MAGNETRON
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURE RESULTRESULT
RESULTRESULT
RESULT
1)Checkforresistance:Acrossthefilament
terminalofthemagnetronwithanohm. Normalreading:
Lessthan1ohm.
2)Checkforresistance:Acrossthefilament
terminalofthemagnetronandthechassis
groundwithanohmmeteronhighestscale.
Normalreading:
Infiniteohms.
A.TESTPROCEDURESA.TESTPROCEDURES
A.TESTPROCEDURESA.TESTPROCEDURES
A.TESTPROCEDURES
Secondary
Winding Filament
Winding
Figure3

‑6‑
Figure7
Figure6
COMPONENTCOMPONENT
COMPONENTCOMPONENT
COMPONENT
HIGH‑VOLTAGEHIGH‑VOLTAGE
HIGH‑VOLTAGEHIGH‑VOLTAGE
HIGH‑VOLTAGE
TRAMSFORMERTRAMSFORMER
TRAMSFORMERTRAMSFORMER
TRAMSFORMER
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURE RESULTRESULT
RESULTRESULT
RESULT
1)Measuretheresistance:
WithanohmmeteronRx1scale.
a.Primarywinding;
b.Filamentwinding;
c.Secondarywinding;
2)Measuretheresistance:
Withanohmmeteronhighestscale.
a.Primarywindingtoground;
b.Filamentwindingtoground;
Normalreading:
a.Approximately1.0ohms.
b.Lessthan1ohm.
c.Approximately60ohms.
Normalreading:
a.Infiniteohms.
b.Infiniteohms.
Normalreading:
Indicatesover10meg‑ohmsin
onedirection(forwarddirec‑
tion)andinfiniteohmsinthe
reversedirection,usingmeter
whichisprovidedwitha9volts
battery.
Note:Removevarnishofmeasured
point.
Normalreading:
Momentarilyindicatesseveral
ohms,andgraduallyreturnsto
10meg‑ohms.
Abnormalreading:
Indicatescontinuityor10
meg‑ohmsfromthebeginning.
Somedigitalmetermayshowover
eveninaforwarddirectionbe‑
causelowmeasuringvoltageof
meterdoesnotallowthemeterto
passthroughthehighvoltage
diode.
Abnormalreading:
Indicatescontinuityorinfinite
ohmsinbothdirections.
Normalreading:
Indicatesinfiniteohmsinboth
directions.
Abnormalreading:
Indicatescontinuityinboth

directionsor continuityinone
onedirectionandinfiniteohm
inreverseddirection.
Measuretheresistance:Acrosstwo
terminalswithanohmmeteronhighest
scale.
Measuretheresistance:Acrosstwo
terminalswithanohmmeteronhighest
scale.
Measuretheresistance:Acrosstwo
terminalswithanohmmeteronhighest
scale.
HIGH‑VOLTAGEHIGH‑VOLTAGE
HIGH‑VOLTAGEHIGH‑VOLTAGE
HIGH‑VOLTAGE
CAPACITORCAPACITOR
CAPACITORCAPACITOR
CAPACITOR
IncludingbleederIncludingbleeder
IncludingbleederIncludingbleeder
Includingbleeder
resistorresistor
resistorresistor
resistor
FUSEDIODEFUSEDIODE
FUSEDIODEFUSEDIODE
FUSEDIODE
HIGH‑VOLTAGEHIGH‑VOLTAGE
HIGH‑VOLTAGEHIGH‑VOLTAGE
HIGH‑VOLTAGE
DIODEDIODE
DIODEDIODE
DIODE
Figure9
Figure8
NOTE

‑7‑
COMPONENTCOMPONENT
COMPONENTCOMPONENT
COMPONENT
TOUCHKEYTOUCHKEY
TOUCHKEYTOUCHKEY
TOUCHKEY
BOARDBOARD
BOARDBOARD
BOARD
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURE RESULTRESULT
RESULTRESULT
RESULT
Measuretheresistancebetween
terminalsofFPCconnectorafter
removingitfromS101.(Figure10)
NOTE
‑WhenreconnectingtheFPCconnector,
makesuretheholesontheconnector
areproperlyinsertedinhookofthe
plasticfastenerinS101.
MATRIXCIRCUITFORTOUCHKEYBOARDMATRIXCIRCUITFORTOUCHKEYBOARD
MATRIXCIRCUITFORTOUCHKEYBOARDMATRIXCIRCUITFORTOUCHKEYBOARD
MATRIXCIRCUITFORTOUCHKEYBOARD
FPCCONNECTORFPCCONNECTOR
FPCCONNECTORFPCCONNECTOR
FPCCONNECTOR
Normalreading:
Approximately62ohms
(Outsideterminals)
Normalreading:
Approximately
1800Kohms@20℃
1400Kohms@25℃
Measuretheresistanceafterremoving
theleadwiresfromtheUpperheater
withanohm‑meteronRx1scale.
Measuretheresistanceafterremoving
theleadwiresfromtheLowerheater
withanohm‑meteronRx1scale.
UPPERHEATERUPPERHEATER
UPPERHEATERUPPERHEATER
UPPERHEATER
(850W)(850W)
(850W)(850W)
(850W)
LOWERHEATERLOWERHEATER
LOWERHEATERLOWERHEATER
LOWERHEATER
(400W)(400W)
(400W)(400W)
(400W)
Resistance
Value
When
touched
Lessthan
1Kohms
Whennot
touched
Morethan
1Mohms
WhencheckingtheGrillkey,connect
ohm‑meterasillustrationbelow.
TERMINALOFFPCCONNECTOR
Figure10
THERMISTORTHERMISTOR
THERMISTORTHERMISTOR
THERMISTOR
Measuretheresistancebetweenthe
Pin1andPin3ofconnectorS103
afterdisconnectingitfromthecon‑
trolcircuitboardwithanohm‑meter
onthehighestscale.
Normalreading:
Approximately130ohms
(Insideterminals)
A4
A5
A6
A7
A8
A9
A1 A2 A3
9
6
7
8
5
210
43
A1
A2
A3
A4
A5
A6
A7
A8
A9
+10
㧯
㧹
612
A10
A10
2TG
JGCV
)TKNN
1XGP
/KETQ
%QODK
.#/2
5'6

‑8‑
COMPONENTCOMPONENT
COMPONENTCOMPONENT
COMPONENT
CONTROLCONTROL
CONTROLCONTROL
CONTROL
P.C.BP.C.B
P.C.BP.C.B
P.C.B Measurethevoltage:BetweentestpointsTP‑1,
TP‑2,TP‑3andgroundorbetweenTP‑4.
(SeeFigure28onpage33)
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURE RESULTRESULT
RESULTRESULT
RESULT
Testpoint
TP Voltage
TP‑1 DC+5V
TP‑2 DC+12V
TP‑3 DC+12V
TP‑4 DC+12V
WARNING:WARNING:
WARNING:WARNING:
WARNING:
Whenremovingthecabinet,youmustdisconnect
thepowersupplycordfromthewalloutletfor
yoursafety.Onlythecheckoutprocedurebelow
needsthepowersupplyon.TAKEGREATCAREto
avoidpossibleelectricalshock.
Foryoursafety,proceedwiththetestonlyForyoursafety,proceedwiththetestonly
Foryoursafety,proceedwiththetestonlyForyoursafety,proceedwiththetestonly
Foryoursafety,proceedwiththetestonly
afterremovingthewireleadsfromtheprimaryafterremovingthewireleadsfromtheprimary
afterremovingthewireleadsfromtheprimaryafterremovingthewireleadsfromtheprimary
afterremovingthewireleadsfromtheprimary
windingofthehighvoltagetransformer.windingofthehighvoltagetransformer.
windingofthehighvoltagetransformer.windingofthehighvoltagetransformer.
windingofthehighvoltagetransformer.
CHECKOUTPROCEDUREFORSWITCHESCHECKOUTPROCEDUREFORSWITCHES
CHECKOUTPROCEDUREFORSWITCHESCHECKOUTPROCEDUREFORSWITCHES
CHECKOUTPROCEDUREFORSWITCHES
Disconnecttheleadwiresfromtheswitchesandcheckforthecontinuityoftheswitches,
connectinganohm‑metertoitsterminals.
CAUTION:Aftercheckingtheswitches,makesurethattheinterlockmonitor
switchisproperlyconnectedaccordingtothe"CIRCUITDIAGRAM"
onpage4.
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURECHECKOUTPROCEDURE
CHECKOUTPROCEDURE
TerminalsCOMandNO
DOORCLOSEDOORCLOSE
DOORCLOSEDOORCLOSE
DOORCLOSE
SWITCHESSWITCHES
SWITCHESSWITCHES
SWITCHES
(SeeFigure1onpage1)(SeeFigure1onpage1)
(SeeFigure1onpage1)(SeeFigure1onpage1)
(SeeFigure1onpage1) DOOROPENDOOROPEN
DOOROPENDOOROPEN
DOOROPEN
INTERLOCKINTERLOCK
INTERLOCKINTERLOCK
INTERLOCK
DOORSENSINGDOORSENSING
DOORSENSINGDOORSENSING
DOORSENSING
II
II
INTERLOCKMONITORNTERLOCKMONITOR
NTERLOCKMONITORNTERLOCKMONITOR
NTERLOCKMONITOR
0 0
00
TerminalsCOMandNO
Primary
winding

‑9‑
B.TROUBLESHOOTINGB.TROUBLESHOOTING
B.TROUBLESHOOTINGB.TROUBLESHOOTING
B.TROUBLESHOOTING
CheckResistance OK
Resistance iscorrect ONorOFF
Control CircuitBoard
STEPSTEP STEPSTEP
STEP RESULTRESULT
RESULTRESULT
RESULT
SEQUENCESEQUENCE SEQUENCESEQUENCE
SEQUENCE
(1)PROBLEM(1)PROBLEM (1)PROBLEM(1)PROBLEM
(1)PROBLEM
PROBLEMPROBLEM PROBLEMPROBLEM
PROBLEM
1‑b1‑b 1‑b1‑b
1‑b
Nodisplayormis‑displayin thedisplaywindowby touchingthekeys.
CheckcontinuityofFUSEFUSE
FUSEFUSE
FUSE,
ThermalProtectorforcavity, ThermalProtectorformagnetron andACPowerCord. Ifthefusehasblown,see
D.REMOVINGFUSEonpage15.
Check230VACpowersupplyof connectorS1betweenPin1and Pin9afterremovingconnector S1fromcontrolcircuitboard.
Replaceitif necessary Runs
Runs
Runs
Runs
Checkpowersupplyvoltage oncontrolcircuitboard. (Seepage8)
Voltage incorrect
EachVoltage OK Checkresistanceof
touchkeyboard (Seepage7)
Normalcontrol circuitboard
Normaltouch keyboard
Correctseatingof connectorS101or replacecontrolcir‑ cuitboard.
Replacetouch keyboard.
Normalcontrol circuitboard
Replacecontrol circuitboard.
0Volt
230Volt
aa aa
a
bb bb
b

‑10‑
ContactOK
Checkcontinuityofconnector S102betweenpinswiththe doorclosedafterremoving connectorS102fromcontrol cctboard.
STEPSTEP STEPSTEP
STEP RESULTRESULT
RESULTRESULT
RESULT
SEQUENCESEQUENCE SEQUENCESEQUENCE
SEQUENCE
(2)PROBLEM(2)PROBLEM (2)PROBLEM(2)PROBLEM
(2)PROBLEM
PROBLEMPROBLEM PROBLEMPROBLEM
PROBLEM
3a3a 3a3a
3a
TouchSTARTkeyandmeasure voltagebetweenthetwowire leadsfromprimarywindingsof H.Vtransformerafterremovingafterremoving
afterremovingafterremoving
afterremoving
thewireleadsfromterminalsthewireleadsfromterminals thewireleadsfromterminalsthewireleadsfromterminals
thewireleadsfromterminals
ofH.Vtransformer.ofH.Vtransformer. ofH.Vtransformer.ofH.Vtransformer.
ofH.Vtransformer.
Runs
Runs
Runs
1.PowerSupplytoOven 2.PrimaryInterlockSwitch 3.ThermalprotectorforCavityandMagnetron
Cookingoperation willnotstart.
ContinuityOK Checkcontact
ofconnector S102
PoorContact
0Volt
230Volt
aa aa
aCHECK;
aa aa
a
(3)PROBLEM(3)PROBLEM (3)PROBLEM(3)PROBLEM
(3)PROBLEM
Ovendoesnotheatup
NoContinuity
CorrectSeating NormalContact
AdjustorReplace DoorSensingSwitch NormalDoor
SensingSwitch
NormalControl Cct.board
ReplaceControl CircuitBoard
PROBLEMPROBLEM PROBLEMPROBLEM
PROBLEM
3‑b3‑b 3‑b3‑b
3‑b

‑11‑
Checkresistanceof eachwindingafter removingleadwires. (Seepage6)
CheckH.Vcapacitor,H.V diodeorFuseDiodewithan ohm‑meterafterremoving theleadwires. (Seepage6)
aa aa
a
(4)PROBLEM(4)PROBLEM (4)PROBLEM(4)PROBLEM
(4)PROBLEM
Lowmicrowavepower output.
ReplaceH.V Magnetron.
STEPSTEP STEPSTEP
STEP RESULTRESULT
RESULTRESULT
RESULT
SEQUENCESEQUENCE SEQUENCESEQUENCE
SEQUENCE
PROBLEMPROBLEM PROBLEMPROBLEM
PROBLEM
3b3b 3b3b
3b
Runs
Runs
Runs
ReplaceH.V Transformer NormalH.VTransformer
NormalH.Vcapaci tor,H.Vdiodeor FuseDiode
NormalH.V capacitor, diodeorfuse diode
DefectiveH.V capacitor,H.V diodeorfuse diode
Normal Magnetron
Checkoperation ofblowermotor whenSTARTkey istouched.
Runs
Runs
Runs
ReplaceH.Vcapaci tor,H.Vdiodeor fusediode
Normal Operation
No Operation Temporarily
shortacross terminalsof thermalprotec‑ torformagnetron orthermalprotec torforcavityby usingjumperlead.
Normal Operation
No Operation
Replacethermal protectorfor magnetronor thermalprotec‑ torforcavity.
Normalthermalprotector formagnetronorthermal protectorforcavity.
Measureresistance ofblowermotor. Normal
Resistance Replacecontrol
circuitboard.
Resistance Incorrect Replace
Blowermotor Normal
Blowermotor
NormalControl circuitboard
bb bb
b
Resistance OK
Resistance incorrect

‑12‑
aa aa
a
(5)PROBLEM(5)PROBLEM (5)PROBLEM(5)PROBLEM
(5)PROBLEM
Themagnetronoperatesonhigh levelwhenalowercookpower isselected.
STEPSTEP STEPSTEP
STEP RESULTRESULT
RESULTRESULT
RESULT
SEQUENCESEQUENCE SEQUENCESEQUENCE
SEQUENCE
Runs
Seppowerlevel atlow. TouchSTARTSTART
STARTSTART
STARTkeyandmeasure
voltagebetweenleadsfor primarywindingofH.Vtransformer
afterremovingthewireleadsfromafterremovingthewireleadsfrom afterremovingthewireleadsfromafterremovingthewireleadsfrom
afterremovingthewireleadsfrom
terminalsofH.Vtransformer.terminalsofH.Vtransformer. terminalsofH.Vtransformer.terminalsofH.Vtransformer.
terminalsofH.Vtransformer.
0Volt
230Volt
Noproblem Measurewater temperaturerise exactly.
aa aa
a
(6)PROBLEM(6)PROBLEM (6)PROBLEM(6)PROBLEM
(6)PROBLEM
Nobuzzingbytouching keysandattheendof cooking
Checknormaloperation ofcontrolcircuitboard Replacecontrol
circuitboard.
Replacerelay circuitboard. Normalrelay
circuitboad
Normalcontrol circuitboad Runs

‑13‑
Runs
Runs
Runs Runs
Unitdoesnotheatupeven ifdisplaycountsdownwhenkey istouchedforOvenCooking
aa aa
a
STEPSTEP STEPSTEP
STEP RESULTRESULT
RESULTRESULT
RESULT
SEQUENCESEQUENCE SEQUENCESEQUENCE
SEQUENCE
(7)PROBLEM(7)PROBLEM (7)PROBLEM(7)PROBLEM
(7)PROBLEM
Overheatingevenifthedisplay windowshows160Cforreheating.
(8)PROBLEM(8)PROBLEM (8)PROBLEM(8)PROBLEM
(8)PROBLEM
Checkresistanceofheater: Upper‑Approx.62ohmacrossterminal Lower‑Approx.130ohmacrossterminal
Resistance Incorrect.
Normal Resistance. Replacecontrol
circuitboard. Normalcontrolcircuit
boardorrelaycircuit board
ReplaceHeater
Normalheater
Replacecontrol circuitboard.
ReplaceOven Thermistor NormalOven
Thermistor
Normalcontrol circuitboardorre‑ laycircuitboard
Resistance
Normal
aa aa
a
CheckresistanceofOven ThermistorbetweenPin3 andPin4ofconnectorS105 afterremovingfromcontrol circuitboard. NOTES:NOTES:
NOTES:NOTES:
NOTES: Whentheoventhermistorcircuitisopen,thedisplaywindowwillcontinuously show160℃eveniftheunitbecomesoverheatedbycontinuousONofthe heater.Whentheheaterisoperatedcontinuouslyfor4min.ormore,errorcode
E‑32isdisplayed.
Whenitisshort‑circuited,thedisplaywindowwillshowtheerrorcode
E‑31.

‑14‑
0
1000
2000
3000
4000
5000
6000
7000
8000
0 102030405060
Resistance (K ohm)
Temperature (°C)
1 2 3 4
ThermistorChartThermistorconnector
Duct
Magnetron
C.ERRORINDICATIONC.ERRORINDICATION
C.ERRORINDICATIONC.ERRORINDICATION
C.ERRORINDICATION
TheDisplaywillshowanerrorindicationforselfdiagnosisasfollows.
"E"meansthataservicetechnicianisrequired.
"U"meansthatusercancorrecttheoperation.
Display Trouble Other Symptom Solution
E-12
●Microwave relay is welded.
●Magnetron thermistor in mode heater
a temperature of 90℃ or higher.
●Oven stops heating.
●Buzzer continuously beeps.
●Check for relay circuit board on Blower motor.
→ This error function will be cancelled when the
CLEAR key is touched.
E-21
●Thermistor (on cavity) senses a
temperature of 300℃ or higher.
●Heater relay (upper) is welded.
●Thermistor on cavity temperature of
240℃ or higher.
●Oven stops heating.
●Buzzer continuously beeps.
●Blower motor will stop
immediately.
●Check and remove the cause of the cavity fire
or abnormal overheating. (such as operation
with no food)
●Check for relay circuit board.
→ This error function will be cancelled when the
power cord is unplugged.
E-31 ●Thermistor (on Magnetron or Oven)
is shorted. ●Oven stops heating.
●Check for short-circuit of thermistor itself or
wire insulation of thermistor.
→ This error function will be cancelled when the
power cord is unplugged.
E-32
●Thermistor (on Magnetron, Oven or
upper Heater) senses a temperature
of 20℃ or lower.
●Oven stops heating.
●Buzzer does not beep.
●Check for open-circuit of thermistor itself or
improper connection of wire socket of
thermistor.
●Check for upper heater.
→ This error function will be cancelled when the
CLEAR key is touched.
E-22 ●One touch memory cooking is not
available. ― Check for error count on PCB board.
→ See page 8.
U-50
●When the Memory key is pressed
after 30 sec. or more have passed
from closing the door.
●When the START key is pressed
30 sec. or more have passed
after heater preheating finished.
●Memory key and Start key are
not available.
→ This error function will be cancelled when
the door is opened and closed, or the power
cord is unplugged.

‑15‑
A.REMOVINGPRIMARYINTERLOCKSWITCHA.REMOVINGPRIMARYINTERLOCKSWITCH
A.REMOVINGPRIMARYINTERLOCKSWITCHA.REMOVINGPRIMARYINTERLOCKSWITCH
A.REMOVINGPRIMARYINTERLOCKSWITCH
(SeeFigure1onpage1)
(1)Disconnectallleadwiresfromthepri‑
maryinterlockswitch.
(2)Remove2screwssecuringtheleverstopper.
(3)Remove1screwsecuringtheswitches.
Thenpullouttheswitches.
(4)Makenecessaryadjustment,andmakemicro‑
waveenergyleakagecheckaccordingto
1.ADJUSTMENTPROCEDUREFORSWITCHESon
page1,afteritisreplacedwithnewone,
checkproperoperationofitaccordingto
CHECKOUTROCEDUREFORSWITCHESonpage6.
(SeeFigureonpage1)
8.DISASSEMBLYINSTRUCTIONS8.DISASSEMBLYINSTRUCTIONS
8.DISASSEMBLYINSTRUCTIONS8.DISASSEMBLYINSTRUCTIONS
8.DISASSEMBLYINSTRUCTIONS
‑OVENMUSTBEDISCONNECTEDFROMELECTRICAL‑OVENMUSTBEDISCONNECTEDFROMELECTRICAL
‑OVENMUSTBEDISCONNECTEDFROMELECTRICAL‑OVENMUSTBEDISCONNECTEDFROMELECTRICAL
‑OVENMUSTBEDISCONNECTEDFROMELECTRICAL
OUTLETWHENMAKINGREPLACEMENTS,REPAIRS,OUTLETWHENMAKINGREPLACEMENTS,REPAIRS,
OUTLETWHENMAKINGREPLACEMENTS,REPAIRS,OUTLETWHENMAKINGREPLACEMENTS,REPAIRS,
OUTLETWHENMAKINGREPLACEMENTS,REPAIRS,
ADJUSTMENTANDCONTINUITYCHECKSBEFOREPRO‑ADJUSTMENTANDCONTINUITYCHECKSBEFOREPRO‑
ADJUSTMENTANDCONTINUITYCHECKSBEFOREPRO‑ADJUSTMENTANDCONTINUITYCHECKSBEFOREPRO‑
ADJUSTMENTANDCONTINUITYCHECKSBEFOREPRO‑
CEEDINGWITHANYREPAIRWORKAFTERDISCON‑CEEDINGWITHANYREPAIRWORKAFTERDISCON‑
CEEDINGWITHANYREPAIRWORKAFTERDISCON‑CEEDINGWITHANYREPAIRWORKAFTERDISCON‑
CEEDINGWITHANYREPAIRWORKAFTERDISCON‑
NECTING,WAITATLEAST1MINUTE,UNTILTHENECTING,WAITATLEAST1MINUTE,UNTILTHE
NECTING,WAITATLEAST1MINUTE,UNTILTHENECTING,WAITATLEAST1MINUTE,UNTILTHE
NECTING,WAITATLEAST1MINUTE,UNTILTHE
CAPACITORINTHEHIGH‑VOLTAGEAREAHASFULLYCAPACITORINTHEHIGH‑VOLTAGEAREAHASFULLY
CAPACITORINTHEHIGH‑VOLTAGEAREAHASFULLYCAPACITORINTHEHIGH‑VOLTAGEAREAHASFULLY
CAPACITORINTHEHIGH‑VOLTAGEAREAHASFULLY
DISCHARGED.DISCHARGED.
DISCHARGED.DISCHARGED.
DISCHARGED.
C.REMOVINGFUSEC.REMOVINGFUSE
C.REMOVINGFUSEC.REMOVINGFUSE
C.REMOVINGFUSE
Removethe15Afusewithscrewdriver.
NOTESNOTES
NOTESNOTES
NOTES
‑Whenreplacingthe15Afuse,besuretouse
anexactrepairpart.
‑Ifthe15Afuseblowsimmediately,check
theinterlockswitch,therelay3and4(on
thecontrolcircuitboard)andtheinter
lockmonitorswitchaccordingtoCHECKOUT
PROCEDUREFORSWITCHESonpage8.Andmake
suretocheckthemicrowaveenergyleakage
accordingto1.ADJUSTMENTPROCEDUREFOR
SWITCHESonpage1,whentheinterlock
switch,therelay3and4ortheinterlock
monitorswitchisadjustedorreplaced.
‑Iftheprimaryinterlockswitch,therelay
3and4ortheinterlockmonitorswitch
operateproperly,determinewhichofthe
followingsisdefective:controlcircuit
board,blowermotor,gearmotor,highvoltage
transformer,highvoltagecapacitor,high
voltagediodeormagnetron.
‑Ifthehighvoltagediodeisdefective,
replacenotonlythehighvoltagediode
butalsothefusediode.
WHENREPLACINGANYDOORMICROSWITCH,WHENREPLACINGANYDOORMICROSWITCH,
WHENREPLACINGANYDOORMICROSWITCH,WHENREPLACINGANYDOORMICROSWITCH,
WHENREPLACINGANYDOORMICROSWITCH,
REPLACEWITHTHESAMETYPESWITCHREPLACEWITHTHESAMETYPESWITCH
REPLACEWITHTHESAMETYPESWITCHREPLACEWITHTHESAMETYPESWITCH
REPLACEWITHTHESAMETYPESWITCH
SPECIFIEDONTHEPARTSLIST.SPECIFIEDONTHEPARTSLIST.
SPECIFIEDONTHEPARTSLIST.SPECIFIEDONTHEPARTSLIST.
SPECIFIEDONTHEPARTSLIST.
(SeeFigureonpage1)
(1)Disconnectallleadwiresfromtheinter‑
lockmonitorswitchanddoorsensingswitch.
(2)Remove1screwsecuringtheseswitches.
Thenpullouttheswitches.
(3)Makethe
necessaryadjustmentsorplacement
of
switchbythereversingstep(2)andcheck
tomicrowaveenergyleakageaccordingto
1.ADJUSTMENTPROCEDUREFORSWITCHESon
page1.Afteritisreplacedwiththenew
one,checkwiththenewone,checkproper
operationofitaccordingtoCHECKOUTPRO‑
CEDUREFORSWITCHESonpage8.
B.REMOVINGINTERLOCKMONITORANDDOORSENSINGB.REMOVINGINTERLOCKMONITORANDDOORSENSING
B.REMOVINGINTERLOCKMONITORANDDOORSENSINGB.REMOVINGINTERLOCKMONITORANDDOORSENSING
B.REMOVINGINTERLOCKMONITORANDDOORSENSING
SWITCHSWITCH
SWITCHSWITCH
SWITCH D.D.
D.D.
D.REMOVINGCABINETREMOVINGCABINET
REMOVINGCABINETREMOVINGCABINET
REMOVINGCABINET
(1)Remove4screwsofthesidesecuringthe
cabinettotheovencavity.
(2)Remove5screwsoftherearsidesecuring
thecabinettotheovencavity.
(3)Removethecabinetfromthemainbodyby
pushingandslidingthecabinetbackwards.

‑16‑
E.E.
E.E.
E.REMOVINGCONTROLCIRCUITBOARDREMOVINGCONTROLCIRCUITBOARD
REMOVINGCONTROLCIRCUITBOARDREMOVINGCONTROLCIRCUITBOARD
REMOVINGCONTROLCIRCUITBOARD
(1)Disconnectallconnectorandleadwiresfrom
thecontrolcircuitboard.
(2)Remove2screwssecuringthetabsforearthing
totheovencavity.
(3)Remove2screwssecuringthecontrolpanelas‑
semblytotheovencavity.
(4)Pushupandthenpulloutthecontrolpanel
assembly.
(5)Disconnectallleadwiresofthecontrolpanel
fromthecontrolPCB.(S105,S106,S102,S1con‑
nectorfortherelayPCB)
F.F.
F.F.
F.REMOVINGTOUCHKEYBOARDANDTIMECONTROLLERREMOVINGTOUCHKEYBOARDANDTIMECONTROLLER
REMOVINGTOUCHKEYBOARDANDTIMECONTROLLERREMOVINGTOUCHKEYBOARDANDTIMECONTROLLER
REMOVINGTOUCHKEYBOARDANDTIMECONTROLLER
Afterremovingcontrolcircuitboard;
(1)Pullthecontrolknobout.
(2)Remove4screwssecuringthecontrolpanel
assemblytothecavityandtheFPCconnector
fromtheconnectorS101whilepushingupthe
endoftheplasticfastener.Andpulltheconnec‑
toroutfromS104.(Figure11)
(3)Insertathinflatbladescrewdriverbetween
thecoverassemblyandcontrolbaseandrelease
thehookonebyone.(Figure12)
(4)Removethetouchkeyboardwhichisheldonthe
controlbasewiththeadhesivetapefromthe
frontofthecontrolbase.(Figure13)
(5)Removetheadhesivetapefromthefrontofthe
controlbasecompletely.
G.REMOVINGCERAMICTRAYASSEMBLYG.REMOVINGCERAMICTRAYASSEMBLY
G.REMOVINGCERAMICTRAYASSEMBLYG.REMOVINGCERAMICTRAYASSEMBLY
G.REMOVINGCERAMICTRAYASSEMBLY
(Seeexplodedviewonpage23)
(1)Takeoffthecabinetandframerearplate
assembly.
(2)Put(insert)ascrewdriverinthe9mmdia‑
meterholelocatingatbacksideofthe
ovencavity.
Andpushthetrayupwiththescrewdriver.
(Figure14)
(3)Openthedoorandtakeoutthetrayvery
carefully.
Figure14
Remove 4 screws
and FPC connector
Release the hook one by one
Remove the touch key board from
the front of the base
Figure12
Figure11
Figure13

‑17‑
４ｘ１８
４ｘ１８
Box wrench
Parts base
Magnetron fittings
Magnetron
Blower motor
Duct for
magnetron
Thermal
protector
Remove 6 screws
Take off the duct from the magnetron
Remove 2 nuts
Make sure to inset the Thermistor Ass’y
on the third fin of the magnetron.
H.REMOVINGMAGNETRONSH.REMOVINGMAGNETRONS
H.REMOVINGMAGNETRONSH.REMOVINGMAGNETRONS
H.REMOVINGMAGNETRONS
(1)Disconnectallleadwiresfromthethermal
protector.
(2)Remove4screwssecuringtheductformagne‑
tron.(Figure15)
(3)Takeofftheductformagnetron.(Figure16)
(4)Disconnect2leadwiresfromthemagnetron
terminalsbyremoving2connectors.
(5)Toremovenutssecuringmagnetronfittings,
insertthelongsizeboxwrenchinthe10mm
diameterholelocatedatthepartsbaseofthe
rearsideasshowninfigure19.
Loose2nuts.(Figure17)
(6)Removethermistorformagnetronfromtheradi‑
antfin.
(7)TakeoutthemagnetronVERYCAREFULLYVERYCAREFULLY
VERYCAREFULLYVERYCAREFULLY
VERYCAREFULLY.
(8)Afterreplacingthemagnetron,makesurethatAfterreplacingthemagnetron,makesurethat
Afterreplacingthemagnetron,makesurethatAfterreplacingthemagnetron,makesurethat
Afterreplacingthemagnetron,makesurethat
theinsertpositionofthermistorformagne‑theinsertpositionofthermistorformagne‑
theinsertpositionofthermistorformagne‑theinsertpositionofthermistorformagne‑
theinsertpositionofthermistorformagne‑
troniscorrectasshowninfigure18.troniscorrectasshowninfigure18.
troniscorrectasshowninfigure18.troniscorrectasshowninfigure18.
troniscorrectasshowninfigure18.
Figure16
Figure17
Figure19 Figure18
NOTESNOTES
NOTESNOTES
NOTES
‑Whenremovingthemagnetron,makesurethatits
domedoesnothitanyadjacentparts,oritmay
bedamaged.
‑Afterreplacingthemagnetron,checkthemicro‑
waveenergyleakagetoensureitisbelowthe
limitoftheregulation(5mW/cm2).
Figure15

‑18‑
II
II
I.CHANGINGPOWERSUPPLYCORD.CHANGINGPOWERSUPPLYCORD
.CHANGINGPOWERSUPPLYCORD.CHANGINGPOWERSUPPLYCORD
.CHANGINGPOWERSUPPLYCORD
(Seeexplodedviewonpage25)
(1)Unfasten1screwforgroundandpullout
the2wiresofthepowercordfromthe
noisefilter.
(2)Remove1screwforthestayplateofthe
cordbushing.
(3)Installthenewpowersupplycordwiththe
reverseprocedureofabove(1)to(2).
WARING;WARING;
WARING;WARING;
WARING;
Forchangingthepowersupplycord,neveruse
otherthanthefollowing.
KeyNo.OrderNo.Partsname
J.REMOVINGHEATERJ.REMOVINGHEATER
J.REMOVINGHEATERJ.REMOVINGHEATER
J.REMOVINGHEATER
(Upperheater)
(1)Takeoffthecabinet.
(2)Remove2screwssecuringtheupperheater
totheovenfrominsideoftheovencavity.
(3)Remove2screwssecuringtheupperheater
totheovencavityfromoutsidetheoven
cavitywith7mmwrench.(Figure21)
(Lowerheater)
(1)Takeoffthecabinetandframerearplate.
(2)Removeceramictrayassemblyfollowing
G.Removingceramictrayassemblyproce‑
dureonpage16.
(3)Remove2screwssecuringthelowerheater
toinsideoftheovencavity.(Figure22)
(4)Remove2screwssecuringthelowerheater
totheovencavityfromoutsideoftheoven
cavitywith7mmboxwrench.
Remove 1 screw for the bottom plate
of the cord bushing.
Remove 2 screws
Figure20
Figure21
Figure22
Remove 2 screws with 7 mm box wrench.
246171803211Cordbush
256172752624Cordassembly
269171401340Stayplate

‑19‑
K.REMOVINGDOORK.REMOVINGDOOR
K.REMOVINGDOORK.REMOVINGDOOR
K.REMOVINGDOOR
Remove3hexnutssecuringtheupperhinge,
remove3hexnutssecuringthelowerhinge
andremove1specialscrewsecuringthedoor
arm(locatedatthebottomofthedoorsash)
NOTES
‑Afterreplacingthedoor,besuretocheck
thattheprimaryinterlockswitch,thedoor
sensingswitchandtheinterlockmonitor
switchoperatenormally.
(Seepages1and8)
‑Afterreplacingthedoor,checkformicro‑
waveenergyleakagewithaleakagedetector.
Microwaveenergyleakagemustbebelowthe
limitof5mW/cm2.
(1)Insertathinflatbladescrewdriver
betweenthechokedielectricandthe
doorassemblycomp.andliftupthe
chokedielectrictoreleasethehook
onebyone.
(2)Toremovedoorcover,removethe14screws
securingthedoorcovertothedoor
assemblycomp.
(3)Remove1screwsecuringthecoveras‑
semblytothedoorassemblycomp.
(Figure23‑(a))
(4)Insertathinflatbladescrewdriver
betweenthedoorbaseanddooras‑
semblycomp.andreleasethehookone
byone.
(5)Todetachthecoverassembly,insert
athin
flatbladescrewdriver between
thedoorpanelanddoorcover,and
releasethecliponebyone.
NOTES
Thechokedielectric,theglassdoor
panelandthedoorcovermaybedam‑
agedwhentheyareremoved.Whenre‑
installingthedoorinplace,check
formicrowaveenergyleakagewitha
leakagedetector.Microwaveenergy
leakagemustbebelowthelimitof
5mW/cm2.
Figure23
Both sides tape
Cover assembly
Door base
Door handle
Ornament plate
Door cover
Door panel
Packing
Door assembly comp.Choke dielectric
Packing
Door arm
Latch sup.
Spring
Door latch
4x6
4x16
5x16
5x16
Remove 1 screw
securing the cover
assembly to the door
assembly comp.
(a)
L.DISASSEMBLYDOORL.DISASSEMBLYDOOR
L.DISASSEMBLYDOORL.DISASSEMBLYDOOR
L.DISASSEMBLYDOOR