SERVICE MANUAL
®
S10212R671EHW
SUPPLEMENT
%
Kg
AUTO
COOK
MICROWAVE OVEN WITH
TOP AND BOTTOM GRILL
AUTO
DEF
WATT
/Kg
STOP
+1min
MODEL
R-671
R- 671 (W) F
In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
This service manual covers only those items that differ from the S10808R671EHW.
R-671(W)
TABLE OF CONTENTS
REF No
PART CODE
DESCRIPTION
3-2
HPNLCW076URR0
Control Panel
1
AP
3-5
GMADIA040URR0
Display Window
1
AH
3-6
JBTN-W033URF0
Start Button
1
AE
3-9
JBTN-R029URF0
More /Less Button
1
AD
3-10
JBTN-O020URR0
Pizza Button
1
AD
SHARP CORPORATION
QTY
CODE
®
SERVICE MANUAL
S10808R671EHW
MICROWAVE OVEN WITH
TOP AND BOTTOM GRILL
%
Kg
AUTO
COOK
MODELS
AUTO
DEF
WATT
/Kg
STOP
+1min
R-671
R-671(B)
R-671(W)E
R-671(W)
R-671(IN)E
R-671(IN)
R-671(B)E
R-671(W)N
In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
TABLE OF CONTENTS
Page
CAUTION, MICROWAVE RADIATION .................................................................................................... 2
WARNING ................................................................................................................................................. 3
SERVICING ............................................................................................................................................. 4
PRODUCT SPECIFICATIONS ................................................................................................................. 7
GENERAL INFORMATION ....................................................................................................................... 7
APPEARANCE VIEW .............................................................................................................................. 8
OPERATION SEQUENCE ........................................................................................................................ 9
FUNCTION OF IMPORTANT COMPONENTS ..................................................................................... 11
TROUBLESHOOTING GUIDE ............................................................................................................... 12
TEST PROCEDURE .............................................................................................................................. 13
CONTROL PANEL ASSEMBLY ............................................................................................................ 20
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE .................................................. 24
MICROWAVE MEASUREMENT ........................................................................................................... 30
TEST DATA AT A GLANCE .................................................................................................................. 31
WIRING DIAGRAM ................................................................................................................................ 32
PICTORIAL DIAGRAM .......................................................................................................................... 35
CONTROL PANEL CIRCUIT .................................................................................................................. 36
PRINTED WIRING BOARD .................................................................................................................... 37
PARTS LIST .......................................................................................................................................... 38
CABINET AND UNIT CHASSIS PARTS ................................................................................................. 41
CONTROL PANEL/DOOR PARTS ......................................................................................................... 42
MISCELLANEOUS/PACKING AND ACCESSORIES ............................................................................. 43
SHARP CORPORATION
R-671 - 1
CAUTION
MICROWAVE RADIATION
Personnel should not be exposed to the microwave energy which may radiate from the
magnetron or other microwave generating devices if it is improperly used or connected.
All input and output microwave connections, waveguides, flanges and gaskets must be
secured.
Never operate the device without a microwave energy absorbing load attached.
Never look into an open waveguide or antenna while the device is energized.
VARNING
MICKROVAGSSTRALING
Personal får inte utsättas för mikrovågsenergi som kan ustrala från magnetronen eller
andre mikrovågsalstrande anordningar om dessa är felanslutna eller används på fel sätt.
Alla in-och utgångsanslutningar för mikrovågor, vagledare, flänsar och packningar måste
vara fast anslutna.
Mikrovågsgeneratorn får inte arbeta utan att absorberande belastning är ansluten. Titta
aldrig in i ën öppen vågledare eller antenn när mikrovågsgeneratorn är påkopplad eller
laddad.
VAROITUS
MIKROAALTOSÄTELYÄ
Käyttäjä ei saa joutua alttiiksi mikroaaltoenergialle, jota voi säteillä magnetronista tai
muusta mikroaaltoja kehittävästä laitteesta, jos sitä käytetään tai jos se kytketään väärin.
Kaikkien mikroaaltoliitäntöjen sekä syöttö-että ulostulopuolella, aaltoputkien laippojen ja
tiivisteiden tulee olla varmistettuja.
Mikroaaltouunnia ei koskaan saa käyttää ilman kuormaa jossa mikroaaltoenergiaa kuluu.
Avoimeen aaltoputkeen tai antenniin ei koskaan saa katsoa virran ollessa kytkettynä.
ADVARSEL
MIKROBØLGESTRÅLING
Personell må ikke utsettes for mikrobølge-energi som kan utståles fra magnetronen eller
andre mikrobølge-generende deler dersom apparatet feilbetjenes eller blir feiltikoplet.
Alle inn-og ut-tilkoplinger i forbindelse med mikrobølge-strålingen, bølgeledere, flenser og
tetningsringer/pakninger må festes ordentlig.
Aldri bruk apparatet med mindre en mikrobålge-absorberende last er plassert i
ovnsrommet.
Aldri se direkte inn i en åpen bølgeleder eller antenne imens apparatet er strømførende.
ADVARSEL
MIKROBØLGEBESTRÄLING
Man bør ikke udsætte sig for mikrobølgebestråling fra magnetronen eller andre
mikrobølgefrembringende anordninger, hvilket kan ske hvis apparatet er forkert tilsluttet
eller bruges forkert. Alle mikrobølgeindgange og-udgange, bølgeledere, flanger og
tætningsstrimler må være forsvarligt udført.
Anvend aldrig ovnen uden en mikrobølgesabsorberende anordning. Se aldrig ind i en
åben bølgeleder eller antenne, mens ovnen er i brug.
R-671 - 2
SERVICE MANUAL
®
MICROWAVE OVEN WITH TOP AND BOTTOM GRILL
R-671(B)/ R-671(W)/ R-671(IN)
GENERAL IMPORTANT INFORMATION
This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information.
It is recommended that service engineers carefully study the entire text of this manual, so they will be qualified to render
satisfactory customer service.
WARNING
Note:
The parts marked "*" are used in voltage more than 250V. (Parts List)
Anm:
Delar märket med "*" har en spänning överstigande 250V.
Huom:
Huolto-ohjeeseen merkitty "tähdella" osat joissa jännite on yli 250 V.
Bemerk:
Deler som er merket "asterisk" er utsatt for spenninger over 250V til jord.
Bemærk:
"Dele mærket med stjerne benyttes med højere spænding end 250 volt.
WARNING
Never operate the oven until the following points are ensured.
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
(D) The door is not deformed or warped.
(E) There is not any other visible damage with the oven.
Servicing and repair work must be carried out only by trained service engineers.
Removal of the outer wrap gives access to potential above 250V.
All the parts marked "∆" on the parts list may cause undue microwave exposure, by themselves, or when they are
damaged, loosened or removed.
Never operate the Grill and/ or Bottom heater with the oven outer cabinet removed. (Because air flow is
eliminated, and the excess heat generated on adjacent components). It can cause permanent damage or fire.
SHARP CORPORATION
OSAKA, JAPAN
R-671 - 3
SERVICING
WARNING TO SERVICE PERSONNEL
GB Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts will
result in electrocution.
High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage harness.
REMEMBER TO CHECK 3D
REMEMBER TO CHECK 4R
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
1) Reconnect all leads removed from components during
testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run the oven. Check all functions.
WARNING: AGAINST THE CHARGE OF THE HIGHVOLTAGE CAPACITOR
The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the highvoltage capacitor (that is, of the connecting lead of the highvoltage rectifier) against the chassis with the use of an
insulated screwdriver.
Sharp recommend that wherever possible fault-finding is
carried out with the supply disconnected. It may in, some
cases, be necessary to connect the supply after the outer
case has been removed, in this event carry out 3D checks and
then disconnect the leads to the primary of the power transformer. Ensure that these leads remain isolated from other
components and the oven chassis. (Use insulation tape if
necessary.) When the testing is completed carry out 3D
checks and reconnect the leads to the primary of the power
transformer.
NL
Microwave ovens should not be run empty. To test for the
presence of microwave energy within a cavity, place a cup of
cold water on the oven turntable, close the door and set the
power to HIGH and set the microwave timer for two (2) minutes.
When the two minutes has elapsed (timer at zero) carefully
check that the water is now hot. If the water remains cold carry
out 3D checks and re-examine the connections to the component being tested.
When all service work is completed, and the oven is fully
assembled, the microwave power output should be checked and
a microwave leakage test carried out.
Magnetronovens bevatten circuits die een zeer hoge spanning en stroom kunnen voortbrengen. Contact met de
volgende onderdelen kan elektrocutie tot gevolg hebben.
Hoogspanningscondensator, hoogspanningstransformator, magnetron, hoogspanningsgelijkrichter, hoogspannings
kabelboom.
VERGEET DE VOLGENDE 4 STAPPEN NIET
VERGEET DE VOLGENDE 3 STAPPEN NIET
1) Haal de stekker uit het stopcontact.
2) Open de deur en zorg ervoor dat hij niet dicht kan vallen.
3) Ontlaad de hoogspanningscondensator.
PAS OP VOOR DE ELECTRISCHE LADING VAN DE
HOOGSPANNINGSCONDENSATOR
De hoogspanningscondensator blijft nog ongeveer 60
seconden lang opgeladen, nadat de oven is uitgeschakeld.
Wacht 60 seconden voordat u de verbinding van de
hoogspannings-condensator (m.a.w. de verbindingsdraad
van de hoogspanningsgelijkrichter) met een geïsoleerde
schroevedraaier kortsluit tegen het chassis.
Sharp beveelt ten sterkste aan dat, voor zover mogelijk,
defecten worden opgespoord wanneer de stekker uit het
stopcontact is gehaald. Soms is het nodig om de stroomtoevoer
weer tot stand te brengen nadat de buitenmantel verwijderd
is. Herhaal dan de bovengenoemde 3 stappen en haal de
electrische draden uit de primaire zijde van de
vermogenstransformator. Zorg ervoor dat deze draden
geïsoleerd blijven van andere elementen en van het chassis
van de oven. (Gebruik zo nodig isolatieband.) Wanneer de
test is uitgevoerd, herhaalt u de bovenstaande 3 stappen en
verbindt u de electrische draden weer aan de primaire zijde
van de vermogenstransformator.
1)
2)
3)
4)
Sluit de draden weer aan diezijn losgehaald voor de test.
Plaats de buitenmantel weer om het toestel heen (kabinet).
Stop de stekker weer in het stopcontact.
Zet de oven aan. Controleer alle functies.
Magnetronovens mogen niet leeg aangezet worden. Om te
controleren of er microgolf-energie binnen de oven wordt
geproduceerd, plaatst u een mok met koud water op de
draaitafel van de oven, sluit de deur, zet de oven op HIGH en
stelt de klok van de magnetron in op twee (2) minuten. Wanneer
de twee minuten voorbij zijn (klok staat op nul), controleert u
voorzichtig of het water heet is. Indien het water nog steeds
koud is, herhaalt u de allereerste drie stappen en controleer
nogmaals de aansluitingen naar de geteste onderdelen.
Wanneer alle reparaties zijn uitgevoerd en de oven weer in
elkaar is gezet, moet de het magnetronvermogen worden
gecontroleerd en moet worden gecontroleerd of er geen
microgolflekkage is.
R-671 - 4
SERVICING CONT...
E
Los hornos de microondas contienen circuitos eléctricos capaces de producir voltajes de alta tensión y descargas
eléctricas. Para evitar el riesgo de electrocución, absténgase de tocar los siguientes componentes: condensador de alta
tensión, transformador de alta tensión, magnetrón, dispositivo del rectificador de alta tensión y arnés de alta tensión.
RECUERDE LA COMPROBACION 3D
RECUERDE LA COMPROBACION 4C
1) Desconecte la alimentación.
2) Deje la puerta abierta y calzada.
3) Descargue el condensador de alto voltaje.
ADVERTENCIA
SOBRE
LA
CARGA
DEL
CONDENSADOR DE ALTO VOLTAJE
El condensador de alto voltaje permanece cargado unos
60 segundos después de haber apagado el horno. Espere
60 segundos y luego ponga en cortocircuito la conexión del
condensador de alto voltaje (esto es, del conductor de
conexión del rectificador de alto voltaje) al chasis con un
destornillador de mango aislado.
Se recomienda encarecidamente que siempre que sea
posible la localización de fallos se realice con la alimentación
desconectada. Puede ser que en algunos casos sea
necesario conectar la alimentación después de haber retirado
la carcasa exterior. En este caso, realice las comprobaciones
3D y luego desconecte los conductores del primario del
transformador de alimentación. Asegúrese de que estos
conductores permanezcan aislados de otros componentes y
del chasis del horno. (Use cinta aislante si es necesario).
Cuando termine la prueba efectúe las comprobaciones 3D y
reconecte los conductores al primario del transformador de
alimentación.
SV
1) Conecte todos los componentes desconectados de los
componentes durante la prueba.
2) Coloque la carcasa exterior (cabina).
3) Conecte la alimentación.
4) Compruebe todas sus funciones despues de poner en
marcha el horno.
Los hornos de microondas no deben funcionar vacíos. Para
comprobar la presencia de energía de microondas dentro de
una cavidad, coloque una taza de agua fría en el plato giratorio
del horno, cierre la puerta y ponga la potencia en HIGH (alta)
y coloque el temporizador en dos (2) minutos. Cuando
transcurran los dos minutos (temporizador a cero) compruebe
cuidadosamente que el agua se ha calentado. Si el agua
permaneciese fría, efectúe las comprobaciones 3D y vuelva a
examinar las conexiones de los componentes que han sido
probados.
Cuando haya terminado la intervención en el equipo y el horno
haya sido ensamblado de nuevo completamente, deberá
comprobar la potencia de salida de microondas y realizar una
prueba de fugas de microondas.
Mikrovågsugnar innehåller kretsar som producerar mycket höga spänningar och strömmar.
Kontakt med följande komponenter kan leda till dödsfall:
Högspänningskondensator, transformator, magnetron, högspännings likriktare, högspännings kablage.
KOM IHÅG ATT KONTROLLERA 3 STEG
KOM IHÅG ATT KONTROLLERA 4 STEG
1) Koppla från strömkällan.
2) Öppna dörren på glänt.
3) Ladda ur högspänningskondensatorn.
1)
2)
3)
4)
VARNING FÖR LADDNINGEN I
HÖGSPÄNNINGSKONDENSATORN
Högspänningskondensatorn är laddad i 60 sekunder efter
det att ugnen stängts av. Vänta 60 sekunder och korislut
sedan kondensatoms anslutning (dvs anslutningen till
högspänningslikriktaren) till chassiet med hjälp av en isolerad
skruvmejsel.
Sharp rekommenderar att felsökning sker med strömmen
fränkopplad. Ibland kan det var nödvändigt att koppla på
strömmen efter det att höljet avlägsnats, utför da 3 Steg
kontrollen och koppla sedan från ledarna till transformatorns
primärsida. Se till att ledarna är isolerade från andra
komponenter och chassiet. (Använd isoleringsband om det
behövs). När Du testat färdigt utför Du 3 Steg kontrollen och
ansluter ledningarna till transformatorns primärsida igen.
Anslut alla ledningar som använts vid testning
Sätt tillbaka ytterhöljet.
Anslut strömkällan på nytt.
Sätt på ugnen. Kontrollera alla funktioner.
Mikrovågsugnar får inte användas tomma. Kontrollera
mikrovågsstrålningen i olika delar av ugnen genom att placera
en kopp med kallt vatten på ugnens tallrik, stäng dörren, ställ
in HIGH och ställ in 2 minuter på timern. När två minuter har gått
(timem visar 0) kontrollerar du om vattnet är varmt. Om vattnet
fortfarande är kallt utför Du 3 steg kontroller och kontrollerar
anslutningarna till varje enskild komponent på nytt.
När all service är klar och ugnen ihopskruvad skall ugnens
uteffekt och eventuellt mikrovågsläckage kontrolleras.
R-671 - 5
SERVICING CONT...
I
I forni a microonde contengono un circuito elettrico in grado di generare tensioni e correnti estremamente elevate.
L’eventuale contatto con i seguenti componenti può causare la folgorazione:
condensatore ad alta tensione; trasformatore ad alta tensione; magnetron; rettificatore alta tensione; cablaggio ad
alta tensione.
TRE OPERAZIONI IMPORTANTI PER
INCOMINCIARE
QUATTRO VERIFICHE IMPORTANTI DA NON
DIMENTICARE
1) Scollegare l'alimentazione elettrica.
2) Verificare che la porta sia bloccata in posizione
aperta.
3) Scaricare il condensatore ad alta tensione.
1) Ricollegare tutti i conduttori staccati dai vari componenti
durante l'intervento.
2) Rimontare la scatola esterna.
3) Ripristinare l'alimentazione elettrica.
4) Rimettere in funzione il forno. Controllare tutte le funzioni.
ATTENZIONE AL CONDENSATORE AD ALTA
TENSIONE: PUO ESSERE CARICO
Il condensatore ad alta tensione rimane carico per circa
60 secondi dopo lo spegnimento del forno. Occorre quindi
spettare 60 secondi prima di cortocircuitare, utilizzando
un cacciavite con impugnatura isolata, il collegamento
del condensatore ad alta tensione (cioè del conduttore
di collegamento del raddrizzatore ad alta tensione) sul
telaio del forno.
Sharp raccomanda, nei limiti del possibile, che la ricerca
dei guasti avvenga in assenza di alimentazione elettrica.
In alcuni casi tuttavia, può essere necessario alimentare
l'apparecchio dopo aver rimosso la scatola esterna. In
questo caso eseguire i tre controlli sopra citati e quindi
scollegare i connettori dal primario del trasformatore.
Assicurarsi che tali connettori non vengano a contatto con
altri componenti, ne con il telaio del forno (fare uso, se
necessario, di nastro isolante). Al termine dell'intervento,
eseguire nuovamente i tre controlli e ricollegare i conduttori
al primario del trasformatore.
I forni a microonde non devono mai funzionare a vuoto. Per
verificare la presenza di energia da microonde all'interno
di una cavitá, mettere una tazza di acqua fredda sul piatto
rotante del forno, chiudere la porta, regolare la potenza su
HIGH ed impostate il temporizzatore su due (2) minuti.
Trascorsi i due minuti (temporizzatore a zero), controllare
accuratamente che ora l'acqua sia calda. Se l'acqua è
rimasta fredda, eseguire i tre controlli iniziali e verificare
nuovamente i collegamenti del componente in questione.
Dopo aver portato a termine le operazioni di manutenzione
e rimontato il forno, è necessario controllare la potenza delle
microonde emesse ed eseguire un test per verificare che
non vi sia alcuna dispersione.
R-671 - 6
PRODUCT DESCRIPTION
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
Power Consumption
Power Output
Grill heating element Power Output (Top Grill)
Bottom heating element Power Output
Case Dimensions
Cooking Cavity Dimensions
Turntable diameter
Control Complement
Set Weight
230 Volts
50 Hertz
Single phase, 3 wire earthed
Microwave cooking 1.3 kW Approx. 5.8 A
Top Grill mode ..................... 0.75 kW
Approx. 3.3 A
Grill cooking
Bottom Grill mode ................ 0.45 kW
Approx. 2.0 A
Top and Bottom mode ........ 1.15 kW
Approx. 5.0 A
Micro and Top Grill ................ 2.0 kW
Approx. 8.8 A
Micro and Bottom Grill ........... 1.7 kW
Approx. 7.5 A
Dual cooking
Micro and Top and Bottom Grill
(Auto cook only) ............. 2.4 kW Approx. 10.6 A (Max.)
800 W nominal of RF microwave energy (measured by method of IEC 705)
Operating fequency 2450 MHz
700 W
400 W
Width
450 mm
Height 298 mm including foot
Depth
392 mm
Width
296 mm
Height 203 mm
Depth
297 mm
275 mm
Touch Control System
Clock (1:00 - 12:59 or 0:00 - 23:59) / Timer (0 - 90 minutes)
Microwave Power for Variable Cooking
Repetition Rate;
100% ................................. Full power throughout the cooking time
70% .................................................. approx. 70% of FULL Power
50% .................................................. approx. 50% of FULL Power
30% .................................................. approx. 30% of FULL Power
10% .................................................. approx. 10% of FULL Power
LESS/MORE buttons
PIZZA button, AUTO COOK button
AUTO DEFROST button, WATT button
COOKING MODE selector, STOP button
+ 1 min./START button, CLOCK setting button
TIME/WEIGHT dial
Approx. 15 kg
GENERAL INFORMATION
WARNING
THIS APPLIANCE MUST BE EARTHED
IMPORTANT
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW
BLUE
BROWN
:
:
:
EARTH
NEUTRAL
LIVE
R-671 - 7
APPEARANCE VIEW
OVEN
10
3
11
12
2
1
6
8
5
4
9
7
14
13
1.
2.
3.
4.
5.
6.
7.
8.
Control panel
Oven lamp
Grill heating element (Top Grill)
Door opening button
Waveguide cover
Oven cavity
Turntable motor shaft
Grill heating element
(Bottom Grill)
9. Door seals and sealing surfaces
10.Ventilation openings
11.Outer cabinet
12.Power supply cord
13.Turntable
14.Rack
CONTROL PANEL
DIGITAL DISPLAY AND INDICATORS
1. WATT indicator
2. WEIGHT indicator
3. LESS /MORE indicator
4. CLOCK indicator
5. COOK indicator
6. AUTO indicator light
It will light during automatic operation.
2
3
6
8
9
OPERATION BUTTONS
7. LESS/MORE buttons
8. PIZZA button
9. AUTO COOK button
10.AUTO DEFROST button
11.COOKING MODE selector
: MICROWAVE cooking
1
4
5
7
Kg WATT
AUTO
AUTO
COOK
10
AUTO
DEF
11
WATT
12
/Kg
: DUAL cooking
: GRILL cooking
12.WATT button
13.TIME/WEIGHT dial
14.CLOCK setting button
15.STOP button
16.+ 1 min./START button
17.DOOR OPEN button
13
STOP
+1 min
16
14
15
R-671
17
R-671 - 8
OPERATION SEQUENCE
OFF CONDITION
Switch
Closing the door activates the primary latch switch and the
stop switch.
IMPORTANT:
When the oven door is closed, the contacts COM-NC
of the monitor switch must be open. When the microwave oven is plugged in a wall outlet (230V / 50Hz), the
line voltage is supplied to the noise filter.
Figure O-1 on page 32
1. The control unit is not energized. The display shows
nothing (Fig. O-1 (a)).
2. Open the door. The contacts (COM-NC) of the primary
latch switch are closed and the control unit is energized. Then contacts of relays RY1 and RY6 are
closed, and the oven lamp will light and the display will
flash
(Fig. -1(b)).
3. Close the door. The contacts (COM-NC) of the primary
latch switch are opened and the oven lamp will be
turned off. The display will stop flashing (Fig. O-1(c)).
NOTE: Energy save mode
1. If the oven has not been used for more than 2 minutes,
the contacts of the relay RY6 will be opened and the
control unit will be not energized. Open and close the
door, the control unit will resume.
2. If the clock is set, this energy save mode does not work.
MICROWAVE COOKING CONDITION
HIGH COOKING
Select the microwave cooking mode with the COOKING
MODE selector. Enter a desired cooking time by turning
the TIME/WEIGHT dial and start the oven by pressing
START button.
Primary latch Switch
Stop switch
Monitor Switch
COM-NO
COM-NC
COM-NO
COM-NO
COM-NC
Condition
During
Oven Door
Cooking Open(No cooking)
Closed
Opened
Opened Closed
Closed
Opened
Closed
Opened
Opened Closed
The circuit to the high voltage transformer, fan motor and
turntable motor are cut off when the primary latch switch
and stop switch are made open. The oven lamp remains
on even if the oven door is opened after the cooking cycle
has been interrupted, because the relay RY1 stay closed.
Shown in the display is remaining time.
6. MONITOR SWITCH CIRCUIT
The monitor switch SW3 is mechanically controlled by
the oven door, and monitors the operation of the
primary latch switch SW1.
6-1. When the oven door is opened during or after the
cycle of a cooking program, the contacts (COM-NO)
of the primary latch switch SW1 and stop switch SW2
must open their contacts first. After that the contacts
(COM-NC) of the monitor switch SW3 can be closed.
6-2. When the oven door is closed, the contacts (COMNC) of the monitor switch SW3 must be opened. After
that the contacts (COM-NO) of the primary latch
switch SW1 and the stop switch SW2 are closed.
6-3. When the oven door is opened and the contacts
(COM-NO) of the primary latch switch SW1 remain
closed, the fuse F2 F8A will blow, because the monitor switch is closed and a short circuit is caused.
MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOW
COOKING
When the microwave oven is preset for variable cooking
power, the line voltage is supplied to the high voltage
transformer intermittently within a 32-second time base
through the relay contact which is coupled with the current-limiting relay RY2. The following levels of microwave
power are given.
Function sequence Figure O-2 on page 33
CONNECTED COMPONENTS
Oven lamp, Turntable motor
High voltage transformer
Grill heating element (Top)
Bottom heating element
Fan motor
Control unit
Contact
RELAY
RY1
RY2
RY3
RY4
RY5
RY6
SETTING
32 sec. ON
Approx. 100%
800P 100%
1. The line voltage is supplied to the primary winding of
the high voltage transformer. The voltage is converted
to about 3.3 volts A.C. output on the filament winding
and high voltage of approximately 2000 volts A.C. on
the secondary winding.
2. The filament winding voltage (3.3 volts) heats the
magnetron filament and the high voltage (2000 volts) is
sent to the voltage doubling circuit, where it is doubled
to negative voltage of approximately 4000 volts D.C..
3. The 2450 MHz microwave energy produced in the
magnetron generates a wavelength of 12.24 cm. This
energy is channelled through the waveguide (transport
channel) into the oven cavity, where the food is placed
to be cooked.
4. When the cooking time is up, a signal tone is heard and
the relays RY1 + RY2 + RY5 go back to their home
position. The circuits to the oven lamp, high voltage
transformer, fan motor and turntable motor are cut off.
5. When the oven door is opened during a cooking cycle,
the switches come to the following condition.
560P
400P
240P
80P
Note:
24 sec. ON
8 sec. OFF
18 sec. ON
14 sec. OFF
12 sec. ON
20 sec. OFF
6 sec. ON
26 sec. OFF
Approx. 70%
70%
Approx. 50%
50%
Approx. 30%
30%
10%
Approx. 10%
The On/Off time ratio does not exactly correspond
to the percentage of microwave power, because
approx. 3 seconds are needed for heating up the
magnetron filament.
GRILL COOKING CONDITION
The oven has three grill cooking condition. They are the
TOP GRILL mode, BOTTOM GRILL mode and TOP AND
BOTTOM GRILL mode.
R-671 - 9
OPERATION SEQUENCE CONT...
TOP GRILL MODE
In this mode, the food is cooked by the grill heating
element (top grill). Select the TOP GRILL mode with the
COOKING MODE selector. Enter the cooking time by
rotating the TIME/WEIGHT dial. When the START button
is pressed, the following operations occur:
1.
2.
3.
4.
5.
6.
Figure O-3(a) on page 33
The relay RY1 + RY3 + RY5 are energized.
The numbers of the digital readout start the count down
to zero.
Then the grill heating element (top), turntable motor,
oven lamp and fan motor are energized.
Now, the food is grilled by the grill heating element.
Upon completion of the selected cooking time, audible
signal sounds and the contacts of relays RY1 + RY3
are opened, then the grill heating element (top), turntable motor and oven lamp are de-energized.
The relay RY5 stays closed for five (5) minutes, and the
fan motor operates.
BOTTOM GRILL MODE
In this mode, the food is cooked by the bottom heating
element. Select the BOTTOM GRILL mode with the COOKING MODE selector. Enter the cooking time by rotating the
TIME/WEIGHT dial. When the START button is pressed,
the following operations occur:
1.
2.
3.
4.
5.
6.
Figure O-3(b) on page 33
The relay RY1 + RY4 + RY5 are energized.
The numbers of the digital readout start the count down
to zero.
Then the bottom heating element, turntable motor,
oven lamp and fan motor are energized.
Now, the food is grilled by the bottom heating element.
Upon completion of the selected cooking time, audible
signal sounds and the contacts of relays RY1 + RY4
are opened, then the bottom heating elements, turntable motor and oven lamp are de-energized.
The relay RY5 stays closed for five (5) minutes, and the
fan motor operates.
TOP AND BOTTOM GRILL MODE
In this mode, the food is cooked by both the grill heating
element (top grill) and bottom heating element. Select the
TOP AND BOTTOM GRILL mode with the COOKING
MODE selector. Enter the cooking time by rotating the
TIME/WEIGHT dial. When the START button is pressed,
the following operations occur:
1.
2.
3.
4.
5.
Figure O-3(c) on page 34
The relay RY1 + RY3 + RY4 + RY5 are energized.
The numbers of the digital readout start the count down
to zero.
Then the grill heating element (top), bottom heating
element, turntable motor, oven lamp and fan motor are
energized.
Now, the food is grilled by the grill heating element
(top) and the bottom heating element.
Upon completion of the selected cooking time, audible
signal sounds and the contacts of relays RY1 + RY3 +
RY4 are opened, then the grill heating element (top),
bottom heating element, turntable motor and oven
lamp are de-energized.
6. The relay RY5 stays closed for five (5) minutes, and the
fan motor operates.
DUAL COOKING CONDITION
The oven has two dual cooking mode. One is MICROWAVE AND TOP GRILL mode and other one is MICROWAVE AND BOTTOM GRILL mode. In both modes, the
relay RY2 operates intermittently with in a 48 seconds time
base as shown below.
Power level
ON time
OFF time
100%
48 sec.
0 sec.
70%
36 sec.
12 sec.
50%
26 sec.
22 sec.
30%
16 sec.
32 sec.
10%
8 sec.
40 sec.
MICROWAVE AND TOP GRILL MODE (DUAL 1)
In this mode, the food is cooked by microwave and the grill
heating element (top). Select the MICROWAVE AND TOP
GRILL mode with the COOKING MODE selector and then
select the power level with the WATT button. Enter the
cooking time by rotating the TIME/WEIGHT dial. When the
START button is pressed, the following operations occur
(Fig. O-4(a)):
1. The relay RY1 + RY2 + RY3 + RY5 are energized.
2. The numbers of the digital readout start the count down
to zero.
3. The grill heating element (top), high voltage transformer, turntable motor, oven lamp and fan motor are
energized.
4. Now, the food is cooked by the microwave and grill
heating element (top).
5. Upon completion of the selected cooking time, audible
signal sounds and the contacts of relays RY1 + RY2 +
RY3 are opened, then the grill heating element (top),
high voltage transformer, turntable motor and oven
lamp are de-energized.
6. The relay RY5 stays closed for five (5) minutes, and the
fan motor operates.
MICROWAVE AND BOTTOM GRILL MODE (DUAL 2)
In this mode, the food is cooked by microwave and the
bottom heating element. Select the MICROWAVE AND
TOP GRILL mode with the COOKING MODE selector and
then select the power level with the WATT button Enter the
cooking time by rotating the TIME/WEIGHT dial. When the
START button is pressed, the following operations occur
(Fig . O-4(b)):
1. The relay RY1 + RY2 + RY4 + RY5 are energized.
2. The numbers of the digital readout start the count down
to zero.
3. The bottom heating element, high voltage transformer,
turntable motor, oven lamp and fan motor are energized.
4. Now, the food is cooked by the microwave and bottom
heating element.
5. Upon completion of the selected cooking time, audible
signal sounds and the contacts of relays RY1 + RY2 +
RY4 are opened, then the bottom heating elements,
high voltage transformer, turntable motor and oven
lamp are de-energized.
6. The relay RY5 stays closed for five (5) minutes, and the
fan motor operates.
R-671 - 10
OPERATION SEQUENCE CONT...
PIZZA COOKING
Cooking mode
PIZZA automatically works out the correct cooking mode
and time for cooking. Chose menu with the PIZZA button
and enter the weight of the food with the TIME/WEIGHT
dial. Once the oven starts, it will cook according to the
special cooking sequence.
AUTO COOKING
AUTO COOK automatically works out the correct cooking
mode and time for cooking. Chose menu with the AUTO
COOK button and enter the weight of the food with the
TIME/WEIGHT dial. Once the oven starts, it will cook
according to the special cooking sequence.
AUTO DEFROST
AUTO DEFROST automatically works out the correct
microwave power and time for defrosting. Chose menu
with the AUTO DEF button and to enter the weight of the
food with the TIME/WEIGHT dial. Once the oven starts, it
will cook according to the special cooking sequence.
LIMITATIONS OF POWER OUTPUT IN MANUAL
OPERATION
After the same cooking mode is carried out for more than
the specified cooking time, the power output is automatically reduced by turning the control relays on and off
intermittently, as shown in the table below. This is to
protect the oven door against temperature rising.
Specified cooking
time (minutes)
Limited power
output (%)
Time base
(seconds)
Microwave (100%)
30
70
32
Top grill
30
50
48
Bottom grill
30
50
48
Top grill and
Bottom grill
10 (Top)
10 (Bottom)
50
50
48
48
20 (Micro.)
15 (Grill)
70
50
48
48
20 (Micro.)
15 (Heater)
70
50
48
48
Micro. (100%)
D
U + Top grill
A Micro. (100%)
L
+ Bottom grill
NOTE:
1. In case of Automatic operations, the limitations of
power output are not carried out.
2. In case that the stop button is pressed or the oven door
is opened during cooking, the limitations of power
output are not carried out after the total cooking time
beyond the specified cooking time.
3. In case of the two or more same cooking modes are
carried out, the limitations of power output are not
carried out after the total cooking time beyond the
specified cooking time.
4. In case of the two or more different cooking modes are
carried out, the specified cooking time is started to
count from the point when the cooking mode is changed.
5. If the cooking mode has the power level display, the
power level is also displayed when the limitations of
power output are carried out.
FUNCTION OF IMPORTANT COMPONENTS
DOOR OPEN MECHANISM
PRIMARY LATCH SWITCH SW1
The door can be opened by pushing the open button on the
control panel. When the open button is pushed, the open
lever is pushes lower latch head on the door upward. The
latch head is linked with the lower latch head, so now, the
door can be opened.
1. When the oven door is closed, the contacts (COM-NO)
of the switch must be closed and the contacts (COMNC) must be opened.
2. When the oven door is opened, the contacts (COMNO) of the switch must be opened and the contacts
(COM-NC) must be closed.
LATCH HOOK
MONITOR SWITCH SW3
MONITOR SWITCH
DOOR
LATCH
HEADS
1. When the door is closed, the contacts (COM-NC) must
be opened and the contacts (COM-NO) must be
closed.
2. When the door is opened, the contacts (COM-NC)
must be closed and the contacts (COM-NO) must be
closed.
3. If the oven door is opened and he contacts (COM-NO)
of the primary latch switch SW1 fail to open, the fuse
F2 F8A blows immediately after closing the contacts
(COM-NC) of the monitor switch SW3.
PRIMARY
(MONITORED)
LATCH SWITCH
STOP SWITCH
DOOR OPEN BUTTON
OPEN LEVER
Figure D-1. Door Open Mechanism
STOP SWITCH SW2
1. When the oven door is closed, the contacts (COM-NO)
of the switch must be closed.
2. When the oven door is opened, the contacts (COMNO) of switch must be opened.
CAUTION: BEFORE REPLACING A BLOWN FUSE F2
F8A TEST THE PRIMARY LATCH SWITCH
SW1, MONITOR SWITCH SW3 AND MONITOR RESISTOR (MOUNTED NOISE FILTER) FOR PROPER OPERATION. (REFER
TO CHAPTER “TEST PROCEDURE”).
R-671 - 11
FUNCTION OF IMPORTANT COMPONENTS CONT...
SPECIAL FUSE F1 15A
TURNTABLE MOTOR TTM
If the wire harness or electrical components are shortcircuited, this fuse F1 blows to prevent an electric shock of
fire hazard.
The turntable motor drives the turntable roller assembly
to rotate the turntable.
FUSE F2 F8A 250V
FAN MOTOR FM
1. If the wire harness or electrical components are shortcircuited, this fuse blows to prevent an electric shock or
fire hazard.
2. The fuse also blows when the primary (monitored)
latch switch remains closed with the oven door open
and when the monitor switch contact (COM-NC) closes.
The fan motor drives a blade which draws external cool
air. This cool air is directed through the air vanes surrounding the magnetron and cools the magnetron. This
air is channelled through the oven cavity to remove steam
and vapours given off from heating food. It is then exhausted through the exhausting air vents of the oven
cavity.
THERMAL CUT-OUT TC1 145˚C (HVT)
NOISE FILTER
This thermal cut-out protects the high voltage transformer
against overheating. If the temperature goes up higher
than 145˚C because the fan motor is interrupted or the
ventilation openings are blocked, the thermal cut-out TC1
will open and line voltage to the high voltage transformer
will be cut off and the operation of the magnetron will be
stopped. The thermal cut-out will cut back in at 115˚C.
The noise filter assembly prevents radio frequency interference that might flow back in the power circuit.
THERMAL CUT-OUT TC2 150˚C (OVEN)
BOTTOM HEATING ELEMENT GH2
This thermal cut-out protects the oven against overheating during grill cooking. The thermal cut-out is also designed to prevent damage to the oven if the foods in the
oven catch fire due to over heating produced by improper
setting of the cooking time or failure of the control unit.
Under the normal operation, the oven thermal cut-out TC2
remains closed. However, when abnormally high temperature are reached within the oven cavity, oven thermal
cut-out TC2 will open at 150˚C causing the oven to shut
down. The thermal cut-out will cut back in at 130˚C.
The bottom heating element GH2 is located on the floor
of the oven cavity assembly. The bottom heating element
GH2 sends out heat to grill foods.
When troubleshooting the microwave oven, it is helpful to
follow the Sequence of Operation in performing the
checks. Many of the possible causes of trouble will
require that a specific test be performed. These tests are
given a procedure letter which will be found in the “Test
Procedure” section.
GRILL HEATING ELEMENT (TOP GRILL) GH1
The grill heating element GH1 is located on the top of the
oven cavity assembly. The grill heating element GH1
sends out heat to grill foods.
TROUBLESHOOTING GUIDE
IMPORTANT: If the oven becomes inoperative because
of a blown fuse F2 (F8A) in the primary
latch switch - monitor switch, check the
primary latch switch and monitor switch
before replacing the fuse F2 (F8A).
R-671 - 12
TROUBLESHOOTING GUIDE CONT...
TEST PROCEDURE
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
CONDITION
PROBLEM
Fuse F1 15A blows when power
cord is plugged into wall outlet.
Fuse F2 F8A blows when the
door is opened.
OFF
CONDITION
Oven lamp does not light when
door is opened. (Display
operates.)
Home fuse blows when power
cord is plugged into wall outlet.
Nothing appear in display when
power cord is plugged into wall
outlet and open and close the
door.
Display does not operate
properly when STOP button is
pressed.
Oven does not start when the
START button is pressed.
(Display operates.)
Oven lamp does not light.
(Turntable motor operates.)
Fan motor does not operate.
(Oven lamp lights.)
COOKING
CONDITION
(COMMON MODE)
Turntable motor does not
operate. (Oven lamp lights.)
Oven or electrical parts does
not stop when cooking time is 0
or STOP button is pressed.
Oven goes into cook cycle but
shuts down before end of
cooking cycle.
Oven seems to be operating but
little or no heat is produced in
oven load.
MICROWAVE
COOKING
CONDITION
Oven does not operating
properly during variable cooking
condition except 100% cooking
condition.
Oven goes into cook cycle but
shuts down before end of
cooking cycle.
GRILL
COOKING
CONDITION
DUAL
COOKING
CONDITION
Grill heating element
doesn't operate.
(top)
Bottom heating element doesn't
operate.
Oven seems to be operating but
little or no heat is produced in
oven load. (Microwave power
does not seem to be generated
properly.)
Grill heating element
doesn't operate.
J J K K
L M N N N N N N O
MAGNETRON
HIGH VOLTAGE TRANSFORMER
H.V. RECTIFIER
HIGH VOLTAGE CAPACITOR
PRIMARY LATCH SWITCH
MONITOR SWITCH
STOP SWITCH
THERMAL CUT-OUT 145˚C (HVT)
THERMAL CUT-OUT 150˚C (OVEN)
FUSE 15A (F1)
FUSE F8A (F2)
NOISE FILTER
FAN MOTOR
TURNTABLE MOTOR
GRILL HEATING ELEMENT (TOP)
BOTTOM HEATING ELEMENT
POWER SUPPLY CORD
OVEN LAMP OR SOCKET
SHORTED WIRE HARNESS
OPENED WIRE HARNESS
MIS-ADJUSTMENT OF SWITCHES
CONTROL PANEL
TACT SWITCH
RELAY RY1
RELAY RY2
RELAY RY3
RELAY RY4
RELAY RY5
RELAY RY6
FOIL PATTERN ON P.W.B.
LIMITATION OF OPERATION
A B C D E E E F F G H I
(top)
Bottom heating element doesn't
operate.
R-671 - 13
TEST PROCEDURES
PROCEDURE
LETTER
A
MAGNETRON TEST
COMPONENT TEST
NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL
WHILE THE OVEN IS IN OPERATION.
CARRY OUT 3D CHECKS.
Isolate the magnetron from high voltage circuit by removing all leads connected to filament terminal.
To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron
filament terminals, the meter should show a reading of less than 1 ohm.
To test for short filament to anode condition, connect ohmmeter between one of the filament terminals
and the case of the magnetron (ground). This test should be indicated an infinite resistance. If a low
or zero resistance reading is obtained then the magnetron should be replaced.
MICROWAVE OUTPUT POWER (IEC-705-1988)
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (outer case fitted). Microwave output power from the magnetron can be measured by way
of IEC 705, i.e. it is measured by how much power the water load can absorb. To measure the
microwave output power in the microwave oven, the relation of calorie and watt is used. When P(W)
heating works for t(second), approximately P x t/4.187 calorie is generated. On the other hand, if the
temperature of the water with V(ml) rises ∆T (°C) during this microwave heating period, the calorie of
the water is V x ∆T.
The formula is as follows;
P x t / 4.187 = V x ∆ T P (W) = 4.187 x V x ∆T / t
Our condition for water load is as follows:
Room temperature ........... around 20°C
Power supply Voltage .............. Rated voltage
Water load .................................. 1000 g
Initial temperature .............................. 10±2°C
Heating time .............................. 52 sec.
P = 80 x ∆T
Measuring condition:
1. Container
The water container must be a cylindrical borosilicate glass vessel having a maximum material
thickness of 3 mm and an outside diameter of approximately 190 mm.
2. Temperature of the oven and vessel
The oven and the empty vessel are at ambient temperature prior to the start the test.
3. Temperature of the water
The initial temperature of the water is (10±2)°C.
4. Select the initial and final water temperature so that the maximum difference between the final water
temperature and the ambient temperature is 5K.
5. Select stirring devices and measuring instruments in order to minimize addition or removal of heat.
6. The graduation of the thermometer must be scaled by 0.1°C at minimum and be an accurate
thermometer.
7. The water load must be (1000±5) g.
8. “t” is measured while the microwave generator is operating at full power. Magnetron filament heatup time is not included.
NOTE: The operation time of the microwave oven is “t + 3” sec. (3 sec. is magnetron filament heat-up time.)
Therefore total heating time = 55 sec.
Measuring method:
1. Measure the initial temperature of the water before the water is added to the vessel.
(Example: The initial temperature T1 = 11°C)
2. Add the 1 litre water to the vessel.
3. Place the load on the centre of the shelf.
4. Operate the microwave oven at HIGH for the temperature of the water rises by a value ∆ T of
(10 ± 2) K.
5. Stir the water to equalize temperature throughout the vessel.
6. Measure the final water temperature. (Example: The final temperature T2 = 21°C)
7. Calculate the microwave power output P in watts from above formula.
R-671 - 14
TEST PROCEDURES CONT...
PROCEDURE
LETTER
COMPONENT TEST
Initial temperature .................................................................................................. T1 = 11°C
Temperature after (52 + 3) = 55 sec ...................................................................... T2 = 21°C
Temperature difference Cold-Warm ...................................................................... ∆T1 = 10C
Measured output power
The equation is “P = 80 x ∆T” ...................................................... P = 80 x 10°C = 800 Watts
JUDGMENT: The measured output power should be at least ± 15 % of the rated output power.
CAUTION: 1°C CORRESPONDS TO 80 WATTS. REPEAT MEASUREMENT IF THE POWER IS
INSUFFICIENT.
1000g
1000g
1000g
T1˚C
T2˚C
Heat up for 55 sec
B
HIGH VOLTAGE TRANSFORMER TEST
WARNING:
High voltage and large currents are present at the secondary winding and
filament winding of the high voltage transformer. It is very dangerous to work
near this part when the oven is on. NEVER make any voltage measurements
of the high-voltage circuits, including the magnetron filament.
CARRY OUT 3D CHECKS.
Disconnect the leads to the primary winding of the high voltage transformer. Disconnect the filament
and secondary winding connections from the rest of the HV circuitry. Using an ohmmeter, set on a low
range, it is possible to check the continuity of all three winding. The following readings should be
obtained:a. Primary winding ................................ approximately 2.6 Ω
b. Secondary winding .......................... approximately 143 Ω
c. Filament winding ......................................... less than 1 Ω
If the readings obtained are not stated as above, then the high voltage transformer is probably faulty
and should be replaced.
CARRY OUT 4R CHECKS.
C
HIGH VOLTAGE RECTIFIER TEST
CARRY OUT 3D CHECKS.
Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be tested
using an ohmmeter set to its highest range. Connect the ohmmeter across the terminal B+C of the high
voltage rectifier and note the reading obtained. Reverse the meter leads and note this second reading.
The normal resistance is infinite in one direction and more than 100 kΩ in the other direction.
CARRY OUT 4R CHECKS.
NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF
THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS, BECAUSE
OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIRECTIONS.
D
HIGH VOLTAGE CAPACITOR TEST
CARRY OUT 3D CHECKS.
A. Isolate the high voltage capacitor from the circuit.
B. Continuity check must be carried out with measuring instrument which is set to the highest
resistance range.
C. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10MΩ after
it has been charged.
R-671 - 15
TEST PROCEDURES CONT...
PROCEDURE
COMPONENT TEST
LETTER
D. A short-circuited capacitor shows continuity all the time.
E. An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ
resistance.
F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance.
G. The resistance across all the terminals and the chassis must be infinite when the capacitor is
normal.
If incorrect reading are obtained, the high voltage capacitor must be replaced.
CARRY OUT 4R CHECKS.
E
SWITCH TEST
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in
the following table.
Table: Terminal Connection of Switch
Plunger Operation
COM to NO
COM to NC
Released
Depressed
Open circuit
Short circuit
Short circuit
Open circuit
COM; Common terminal,
NO; Normally open terminal
NC; Normally close terminal
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
F
THERMAL CUT-OUT TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make a continuity
test across the two terminals as described in the below.
Table: Thermal Cut-out Test
Parts Name
Temperature of "ON"
condition (closed circuit).
(˚C)
Temperature of "OFF"
condition (open circuit).
(˚C)
Indication of ohmmeter
(When room temperature
is approx. 20˚C.)
Thermal cut-out 145˚C
Cuts back in at 115˚C.
Above 145˚C
Closed circuit
Thermal cut-out 150˚C
Cuts back in at 130˚C.
Above 150˚C
Closed circuit
If incorrect readings are obtained, replace the thermal cut-out.
An open circuit thermal cut-out TC1 (HVT) indicates that the high voltage transforner has overheated,
this may be due to resistricted ventilation, cooling fan failure or a fault condition within the high voltage
transformer or HV. circuit.
An open circuit thermal cut-out TC2 (OVEN) indicates that the food in the oven cavity may catch fire,
this may be due to over heating produced by improper setting of the cooking timer or failure of the
control panel.
CARRY OUT 4R CHECKS.
G
BLOWN FUSE 15A (F1)
CARRY OUT 3D CHECKS.
If the fuse 15A is blown, there could be a shorts or grounds in electrical parts or wire harness. Check
them and replace the defective parts or repair the wire harness.
CARRY OUT 4R CHECKS.
CAUTION:
H
Only replace fuse 15A with the correct value replacement.
BLOWN FUSE F8A (F2)
CARRY OUT 3D CHECKS.
If the fuse F8A (F2) is blown when the door is opened, check the primary latch switch, monitor switch
and monitor resistor.
R-671 - 16
TEST PROCEDURES CONT...
PROCEDURE
LETTER
COMPONENT TEST
If the fuse F8A (F2) is blown by incorrect door switching replace the defective switch(es) and the fuse
F8A (F2).
CARRY OUT 4R CHECKS.
CAUTION:
I
Only replace fuse with the correct value replacement.
NOISE FILTER TEST
N
L
LINE CROSS CAPACITOR
0.22µ/250V
F1:
FUSE 15A
CARRY OUT 3D CHECKS.
NOISE
FILTER
10M/0.5W
Disconnect the leads from the terminals of noise filter.
Using an ohmmeter, check between the terminals as
described in the following table.
NOISE SUPPRESSION COIL
F2: FUSE F8A
RESISTOR 680K/0.5W
LINE BYPASS
CAPACITOR
4700p/250V
LINE BYPASS
CAPACITOR
4700p/250V
WHT
MEASURING POINTS
Between N and L
Between terminal N and WHITE
Between terminal L and RED
RED
INDICATION OF OHMMETER
Approx. 680 kΩ
Short circuit
Short circuit
If incorrect readings are absorbed, replace the noise filter unit.
CARRY OUT 4R CHECKS.
J
MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals as described in the table below.
Table: Resistance of Motor
Motors
Resistance
Fan motor
Approximately 300 Ω
Turntable motor
Approximately 14.9 kΩ
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
K
GRILL HEATING ELEMENT (TOP) AND BOTTOM HEATING ELEMENT TEST
CARRY OUT 3D CHECKS.
Before carrying out the following tests make sure the heating element is cool completely.
1. Resistance of heating element.
Disconnect the wire leads to the heating element to be tested. Using ohmmeter with low resistance
range. Check the resistance across the terminals of the heating element as described in the
following table.
Table: Resistance of heating element
Parts name
Resistance
Grill heating element (top)
Approximately 76 Ω
Bottom heating element
Approximately 132 Ω
2. Insulation resistance.
Disconnect the wire leads to the heating element to be tested. Check the insulation resistance
between the element terminal and cavity using a 500V - 100MΩ insulation tester. The insulation
resistance should be more than 10 MΩ in the cold start.
If the results of above test 1 and/or 2 are out of above specifications, the heating element is probably
faulty and should be replaced.
CARRY OUT 4R CHECKS.
R-671 - 17
TEST PROCEDURES CONT...
PROCEDURE
COMPONENT TEST
LETTER
L
TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,
unlike conventional microwave ovens, proper maintenance can not be performed with only a voltmeter
and ohmmeter. In this service manual, the touch control panel assembly is in two units, control unit and
key/jog unit and troubleshooting by replacement is described according to the symptoms indicated.
Control Panel.
The following symptoms indicate a defective control unit.
1. Tact Switch.
The following symptoms indicate a defective tact switch. Replace the tact switch.
a) When touching a tact switch, a certain tact switch produces no signal at all.
b) When touching a tact switch, sometimes a tact switch produces no signal.
2. In connection with tact switches.
a) When touching a tact switch, a certain group of tact switch do not produce a signal.
b) When touching a tact switch, no tact switch produce a signal.
3. Potentiometer problem
a) When rotating the potentiometer, the cooking mode can not be selected.
4. Encoder problem
a) When rotating the encoder, the cooking or the weight of food can not be entered.
5. Display problems.
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light up.
d) The corresponding segments of all digits do not light up; or they continue to light up.
e) Wrong figure appears.
f) A certain group of indicators do not light up.
g) The figure of all digits flicker.
h) When touching a tact switch, the control unit does not respond.
6. Other possible problems caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Cooking is not possible.
M
TACT SWITCH TEST
1. Disconnect the oven from the power supply.
2. Discharge the high voltage capacitor.
3. Remove the control unit from the control panel.
4. By using an ohmmeter, check the tact switch operation.
5. When the tact switch is not depressed, an ohmmeter should indicate an open circuit. When the tact
switch is depressed, an ohmmeter should indicate a short circuit. If improper operation is indicated,
the tact switch is probably defective and should be checked.
N
RELAY TEST
Remove the outer case and check voltage between Pin No. 1 and Pin No. 3 of the 5 pin connector (A)
on the control unit with an A.C. voltmeter.
The meter should indicate rated voltage, if not check oven circuit.
RY1, RY2, RY3, RY4, RY5 and RY6 Relay Test
These relays are operated by D.C. voltage
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation, grill
cooking or dual cooking
DC. voltage indicated .......... Defective relay.
DC. voltage not indicated .... Check diode which is connected to the relay coil. If diode is good,
control unit is defective.
RELAY SYMBOL
OPERATIONAL VOLTAGE
RY1
Approx. 24.0V D.C.
Oven lamp / Turntable motor
RY2
Approx. 18.0V D.C.
High voltage transformer
RY3
Approx. 24.0V D.C.
Top heating element
RY4
Approx. 30.0V D.C.
Bottom heating element
RY5
Approx. 24.0V D.C.
Fan motor
RY6
Approx. 24.0V D.C.
Touch control transformer
R-671 - 18
CONNECTED COMPONENTS
TEST PROCEDURES CONT...
PROCEDURE
COMPONENT TEST
LETTER
O
PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING
BOARD (PWB) IS OPEN
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on
the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide given
below for repair.
Problem: POWER ON, indicator does not light up.
CARRY OUT 3D CHECKS.
STEPS
OCCURRENCE
CAUSE OR CORRECTION
1
The rated AC voltage is not present at
POWER terminal of CPU connector (CN-A).
Check supply voltage and oven power cord.
2
The rated AC voltage is present at primary
side of low voltage transformer.
Low voltage transformer or secondary circuit defective.
Check and repair.
3
Only pattern at "a" is broken.
*Insert jumper wire J1 and solder.
(CARRY OUT 3D CHECKS BEFORE REPAIR)
4
Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
(CARRY OUT 3D CHECKS BEFORE REPAIR)
NOTE: *At the time of these repairs, make a
visual inspection of the varistor for
burning damage and examine the
transformer with a tester for the presence of layer short-circuit (check primary coil resistance). If any abnormal
condition is detected, replace the defective parts.
T1
R-671 - 19
(J1)
RY5
a
b
CN - A
CARRY OUT 4R CHECKS.
d
VRS1
1
c
CONTROL PANEL ASSEMBLY
OUTLINE OF CONTROL PANEL
The touch control section consists of the following units as
shown in the touch control panel circuit.
The principal functions of these units and the signals
communicated among them are explained below.
Tact Switch
Signals generated in the LSI are sent to the tact switches.
When a tact switch is touched, a signal is completed
through the tact switch and passed back to the LSI through
to perform the function that was requested.
Control Unit
Control unit consists of LSI, power source circuit, relay
circuit, back light circuit, synchronizing signal circuit, ACL
circuit, buzzer circuit, encoder circuit, potentiometer circuit and indicator circuit.
1) LSI
This LSI controls the tact switch strobe signal, encoder
signal, potentiometer signal, relay driving signal for
oven function and indicator signal.
2) Power Source Circuit
This circuit generates voltage necessary in the control
unit.
Symbol
Voltage
VC
-5.0V
4) ACL Circuit
A circuit to generate a signals which resets the LSI to
the initial state when power is supplied.
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to emit
audible sounds (tact switch touch sound and completion sound).
6) Door Sensing Switch
A switch to "tell" the LSI if the door is open or closed.
7) Relay Circuit
To drive the magnetron, fan motor, turntable motor, top
heating element, bottom heating element and light the
oven lamp.
8) Indicator Circuit
This circuit consists of 4-digits, 12-segments and 3common electrodes using a Liquid Crystal Display.
9) Encoder
The encoder converts the signal generated by LSI into
the pulse signal, and the pulse signal is returned to the
LSI.
10) Potentiometer Circuit
The circuit makes setting of the cooking mode by
variable resistance.
Application
LSI(IC1)
3) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock
circuit. It accompanies a very small error because it
works on commercial frequency.
11) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD1-LD4).
12) Auto Indicator Circuit
A circuit to drive the light (Light emitting diodes LD5).
DESCRIPTION OF LSI
LSI(IZA909DR)
The I/O signal of the LSI(IZA909DR) are detailed in the following table.
Pin No.
1-2
Signal
VL2-VL1
I/O
IN
3-5
AN7-AN5
IN
6
7
AN4
AN3
OUT
IN
8
AN2
IN
P01-P00
P57
OUT
IN
9-10
11
Description
Power source voltage input terminal.
Standard voltage for LCD.
Terminal to change functions according to the Model.
DC voltage in accordance with the Model in operation is applied to set up its
function.
Terminal not used.
Signal coming from potentiometer.
By inputting DC voltage corresponding to the cooking mode set by the potentiometer,
this input is converted into the cooking mode by the A/D converter built into the LSI.
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal.
Door opened; "L" level signal.
Terminal not used.
Terminal not used.
R-671 - 20
DESCRIPTION OF LSI CONT...
Pin No.
12
Signal
P56
I/O
OUT
Description
Oven lamp and turntable motor driving signal(Square Waveform : 50Hz).
To turn on and off shut-off relay (RY1).
The square waveform voltage is
delivered to the relay (RY1) driving
circuit .
13
14
P55
P54
OUT
OUT
Terminal not used.
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
20 msec
H
L
During cooking
0.12 sec
H: GND
A
L
2.4 sec
H: GND
B
L
15
P53
OUT
16
P52
OUT
17
P51
OUT
18
P50
OUT
19
P47
OUT
P46-P44
INT1
OUT
IN
INT0
IN
20-22
23
24
Touch control transformer driving signal.
To turn on and off the shut off relay ( RY6). If the oven has not been used for more
than 2 minutes, the relay RY6 will be turned off. The relay RY6 will be turned on
when the oven door is opened and closed.
H. GND
OFF
Fan motor driving signal.
ON
To turn on and off the fan motor relay RY5.
L
"L" level during cooking, or for 5 minutes
after grill cooking or dual cooking. "H" level
During cooking, or for 5 minutes
after grill cooking, or dual cooking
otherwise.
Grill heater (TOP HEATER) driving signal.
To turn on and off the grill heater relay
During
H. GND
OFF
cooking
(RY3). "L" level during grill (TOP GRILL,
(Grill or dual)
ON
L
TOP AND BOTTOM) cooking or dual
(MICRO+TOP) cooking. "H" level
otherwise.
Bottom heater driving signal.
To turn on and off the bottom relay (RY4).
During
H. GND
OFF
"L" level during grill (BOTTOM HEATER,
cooking
TOP AND BOTTOM) cooking or dual
(Grill or dual)
ON
L
(MICRO+BOTTOM) cooking. "H" level
otherwise.
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
ON/OFF time ratio in MiON/OFF time ratio in Mi(RY2). In 100% POWER
cro cooking
cro cooking
(a. 48second time base)
(a. 32second time base)
operation, the signals hold "L"
level during microwave cooking
MICRO
ON
OFF
MICRO
ON
OFF
and "H" level while not cooking.
COOK
COOK
In other cooking modes (70%,
100%
32sec.
0sec.
100%
48sec.
0sec.
50%, 30%, 10%) the signal turns
70%
24sec.
8sec.
70%
36sec. 12sec.
to "H" level and "L" level in
50%
18sec. 14sec.
50%
26sec. 22sec.
repetition according to the power
30%
12sec. 20sec.
30%
16sec. 32sec.
level.
10%
6sec. 26sec.
10%
8sec. 40sec.
Terminal not used.
Signal coming from encoder.
When the encoder is turned, the contacts of encoder make pluse signals. And
pulse signals are input into INT1.
Signal to synchronized LSI with commercial power source frequency
(50Hz).
H : GND
This is basic timing for time processing of LSI.
L (-5V)
20 msec
25
P41
IN
26
P40
IN
Signal coming from encoder.
Signal similar to INT1. Pulse signals are input into P41.
Connected to VC.
R-671 - 21
DESCRIPTION OF LSI CONT...
Pin No.
Signal
I/O
Description
27
RESET
IN
28-29
30
P71-P70
XIN
OUT
IN
31
XOUT
OUT
32
VSS
IN
33
P27
OUT
34
P26
OUT
35
P25
OUT
P24-P20
P17
OUT
IN
42
P16
IN
43
P15
IN
44-48
49-56
57-60
P14-P10
P07-P00
P37-P34
IN
OUT
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily
set to "L" level the moment power is applied, at this time the LSI is reset. Thereafter
set at "H" level.
Auto indicator (light emitting diode LD5) driving signal.
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XIN terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
Power source voltage: -5V.
VC voltage of power source circuit input.
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P15 - P17 terminal
while one of tact switches (SW1,SW2,SW3) on matrix is touched.
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P15 - P17 terminal
while one of tact switches (SW4-6) on matrix is touched.
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P15 - P17 terminal
while one of tact switches (SW7-9) on matrix is touched.
Terminal not used.
Signalcoming from touch tact switch.
When any one of tact switches SW1, SW4, SW7 on key and jog unit matrix is
touched, a corresponding signal from P25 - P27 will be input into P17. When no
tact switch is touched, the signal is held at "H" level.
Signal similar to P17.
When any one of tact switches SW2, SW5, SW8 on key and jog unit matrix is
touched, a corresponding signal will be input into P16.
Signal similar to P17.
When any one of tact switches SW3, SW6, SW9 on key and jog unit matrix is
touched, a corresponding signal will be input into P15.
Terminal not used.
Terminal not used.
Connected to AVSS
61-72
SEG11-SEG0
OUT
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (72) .............................. S1
SEG 6 (66) ........................... S7
SEG 1 (71) .............................. S2
SEG 7 (65) ........................... S8
SEG 2 (70) .............................. S3
SEG 8 (64) ........................... S9
SEG 3 (69) .............................. S4
SEG 9 (63) ......................... S10
SEG 4 (68) .............................. S5
SEG10 (62) ........................ S11
SEG 5 (67) .............................. S6
SEG11 (61) ........................ S12
73/74
VCC/VREF
IN/IN
Connected to GND.
75
76
77
AVSS
COM3
COM2
IN
OUT
OUT
78
COM1
OUT
79
COM0
OUT
80
VL3
IN
Connected to VC.
Terminal not used.
Common data signal: COM3.
Connected to LCD (Pin No. 3).
Common data signal: COM2.
Connected to LCD (Pin No. 2).
Common data signal: COM1.
Connected to LCD (Pin No. 1).
Power source voltage input terminal.
Standard voltage for LCD.
36-40
41
R-671 - 22
SERVICING
1. Precautions for Handling Electronic Components
This unit uses CMOS LSI in the integral part of the
circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have
extremely high impedance at its input and output
terminals. For this reason, it is easily influenced by the
surrounding high voltage power source, static electricity charge in clothes, etc., and sometimes it is not fully
protected by the built-in protection circuit.
In order to protect CMOS LSI.
1) When storing and transporting, thoroughly wrap
them in aluminium foil. Also wrap PW boards containing them in aluminium foil.
2) When soldering, ground the technician as shown in
the figure and use grounded soldering iron and
work table.
approx. 1M ohm
2. Shapes of Electronic Components
E
C
B
Transistor
2SB1238
Transistor
DTA123ES
DTA143ES
DTD143ES
E
CB
3. Servicing of Touch Control Panel
We describe the procedures to permit servicing of the
touch control panel of the microwave oven and the
precautions you must take when doing so.
To perform the servicing, power to the touch control
panel is available either from the power line of the oven
itself or from an external power source.
(1) Servicing the touch control panel with power
supply of the oven :
CAUTION:
THE HIGH VOLTAGE TRANSFORMER OF THE
MICROWAVE OVEN IS STILL LIVE DURING
SERVICING AND PRESENTS A HAZARD .
Therefore, when checking the performance of the
touch control panel, put the outer cabinet on the
oven to avoid touching the high voltage transformer, or unplug the primary terminal (connector)
of the high voltage transformer to turn it off; the end
of such connector must be insulated with an insulating tape. After servicing, be sure to replace the
leads to their original locations.
A. On some models, the power supply cord between the touch control panel and the oven itself
is so short that the two can't be separated.
For those models, check and repair all the
controls (sensor-related ones included) of the
touch control panel while keeping it connected
to the oven.
B. On some models, the power supply cord between the touch control panel and the oven
proper is so long enough that they may be
separated from each other. For those models,
therefore, it is possible to check and repair the
controls of the touch control panel while keeping
it apart from the oven proper; in this case you
must short both ends of the door sensing switch
(on PWB) of the touch control panel with a
jumper, which brings about an operational state
that is equivalent to the oven door being closed.
As for the sensor-related controls of the touch
control panel, checking them is possible if the
dummy resistor(s) with resistance equal to that
of the controls are used.
(2) Servicing the touch control panel with power
supply from an external power source:
Disconnect the touch control panel completely from
the oven proper, and short both ends of the door
sensing switch (on PWB) of the touch control panel,
which brings about an operational state that is
equivalent to the oven door being closed. Connect
an external power source to the power input terminal of the touch control panel, then it is possible to
check and repair the controls of the touch control
panel; it is also possible to check the sensor-related
controls of the touch control panel by using the
dummy resistor(s).
4. Servicing Tools
Tools required to service the touch control panel assembly.
1) Soldering iron: 30W
(It is recommended to use a soldering iron with a
grounding terminal.)
2) Oscilloscope: Single beam, frequency range: DC 10MHz type or more advanced model.
3) Others: Hand tools
5. Other Precautions
1) Before turning on the power source of the control
unit, remove the aluminium foil applied for preventing static electricity.
2) Connect the connector of the key unit to the control
unit being sure that the lead wires are not twisted.
3) After aluminium foil is removed, be careful that
abnormal voltage due to static electricity etc. is not
applied to the input or output terminals.
4) Attach connectors, electrolytic capacitors, etc. to
PWB, making sure that all connections are tight.
5) Be sure to use specified components where high
precision is required.
R-671 - 23
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below
before operating the oven.
1. Disconnect oven from power supply.
2. Make sure that a definite “click” can be heard when the
microwave oven door is unlatched. (Hold the door in a
closed position with one hand, then push the door open
button with the other, this causes the latch leads to rise,
it is then possible to hear a “click” as the door switches
operate.)
3. Visually check the door and cavity face plate for damage (dents, cracks, signs of arcing etc.).
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1.
2.
3.
4.
5.
6.
Door does not close firmly.
Door hinge, support or latch hook is damaged.
The door gasket or seal or damaged.
The door is bent or warped.
There are defective parts in the door interlock system.
There are defective parts in the microwave generating
and transmission assembly.
7. There is visible damage to the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any
of the following removal procedures:
WARNING FOR WIRING
To prevent an electric shock, take the following
manners.
1. Before wiring,
1) Disconnect the power supply.
2) Open the door and wedge the door open.
3) Discharge the high voltage capacitor and wait for
60 seconds.
2. Don't let the wire leads touch to the following parts;
1) High voltage parts:
Magnetron, High voltage transformer, High voltage capacitor and High voltage rectifier assembly.
2) Hot parts:
Top heating element, Bottom heating element,
Oven lamp, Magnetron, High voltage transformer
and Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Weveguide flange,
Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Switch, Open lever, Open
button.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector certainly until its pin
is locked. And make sure that the wire leads should
not come off even if the wire leads is pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
OUTER CASE REMOVAL
To remove the outer case proceed as follows.
1. Disconnect oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the screws from rear and along the side edge
of case.
4. Slide the entire case back about 3 cm to free it from
retaining clips on the cavity face plate.
5. Lift the entire case from the oven.
6. Discharge the H.V. capacitor before carrying out any
further work.
7. Do not operate the oven with the outer case removed.
N.B.; Step 1, 2 and 6 form the basis of the 3D checks.
CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN
COMPONENT OR WIRING.
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect all the leads except for the terminal of high
voltage rectifier from the high voltage capacitor.
3. Remove one (1) screw holding capacitor holder and
high voltage rectifier earth terminal to the power angle.
4. Release the capacitor holder from the power angle.
5. Remove the capacitor from the capacitor holder.
6. Remove the terminal of high voltage rectifier from the
high voltage capacitor.
7. Now, the high voltage rectifier and the capacitor should
be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER, ENSURE THAT THE CATHODE
(EARTH) CONNECTION IS SECURELY
FIXED TO THE CAPACITOR HOLDER AND
POWER ANGLE WITH AN EARTHING
SCREW.
R-671 - 24
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...
HIGH VOLTAGE TRANSFORMER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the filament leads of high voltage transformer from high voltage capacitor and the magnetron.
3. Disconnect the H.V. wire A from the high voltage
transformer.
4. Disconnect the main wire harness from the high voltage transformer.
5. Remove the HVT thermal cut-out from the high voltage
transformer.
6. Remove the four (4) screws holding the transformer to
power angle.
7. Remove the transformer.
8. Now the high voltage transformer is free.
MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire B and filament lead of the
transformer from the magnetron.
3. Remove the one (1) screw holding the chassis support
to the magnetron.
4. Remove the one (1) screw holding the chassis support
to the oven cavity front flange.
5. Remove the chassis support from the power angle and
move to the right hand side.
6. Release the tabs of air intake duct from the oven cavity.
7. Move the air intake duct to left.
8. Carefully remove two (2) screws holding magnetron to
waveguide, when removing the screws hold the magnetron to prevent any damage.
9. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal object
around the antenna.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
CONTROL PANEL ASSEMBLY REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness and the stop switch
harness from the control unit.
3. Remove the one (1) screw holding the control panel to
the oven cavity front flange.
4. Remove the control panel assembly from the oven.
5. Disconnect the cable from the connector CN-C.
6. Remove the six (6) screws holding the control unit to
the control panel.
7. Remove the control unit from the control panel.
8. Remove the six (6) screws holding the key / jog unit to
the control panel.
9. Remove the key / jog unit from the control panel.
10.Now, the control unit assembly is free.
TURNTABLE MOTOR REPLACEMENT
Removal
1. Disconnect the oven from the power supply.
2. Remove the turntable from the oven cavity.
3. Turn the oven over.
4. Cut the four (4) bridges holding the turntable motor
cover to the base plate with cutting pliers as shown in
Figure C-1(a).
CAUTION: DO NOT DROP THE TURNTABLE MOTOR
COVER INTO THE OVEN AFTER CUTTING
THE BRIDGES. BECAUSE IT WILL DAMAGE THE WIRE LEADS OF THE MOTOR
AND IS ALSO DIFFICULT TO REMOVE
FROM THE OVEN.
5. Remove the turntable motor cover from the power
angle.
6. Disconnect the wire leads from the turntable motor.
7. Remove the one (1) screw holding the turntable motor
to the oven cavity.
8. Bend locating tab to allow removal of turntable motor.
9. Remove the turntable motor from the oven cavity
taking care not to drop or lose the turntable motor
coupling.
10.Now, the turntable motor is free.
Re-install
1. Remove the any sharp edges on the turntable motor
cover and the base plate with the cutting pliers.
2. Re-install the turntable motor by locating shaft onto
coupling then fitting it to the oven cavity with (1) one
screw and bending of location tab.
3. Re-connect the wire leads to the turntable motor.
4. Insert the two (2) tabs of the turntable motor cover into
the slits of the power angle as shown in Figure C-1(b).
5. Fasten the turntable motor cover to the power angle
with the screw (LX-CZA030WRE0) as shown in Figure
C-1(b).
R-671 - 25
Figure C-1(a). Turntable motor cover removal
Cutting pliers
Bridges
Bridges
Turntable motor
cover
Figure C-1(b). Turntable motor cover re-install
Turntable motor cover
Tabs
Slits
Power angle
Screw;
LX-CZA030WRE0
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...
FAN MOTOR REPLACEMENT
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the fan motor.
3. Remove the two (2) screws holding the fan motor to the
power angle.
4. Remove the fan blade from the fan motor shaft according to the following procedure.
1) Hold the edge of the rotor of the fan motor by using
a pair of groove joint pliers.
CAUTION:
• Make sure that any pieces do not enter the gap
between the rotor and the starter of the fan
motor. Because the rotor is easy to be shaven
by pliers and metal pieces may be produced.
• Do not let the pliers touch the coil of the fan
motor because the coil may be cut or damaged.
• Do not distort the bracket by touching with the
pliers.
2) Remove the fan blade from the shaft of the fan
motor by pulling and rotating the fan blade with your
hand.
3) Now, the fan blade will be free.
Because the hole (for shaft) of it may become bigger than a standard one.
5. Now, the fan motor is free.
INSTALLATION
1.
Install the fan blade to the fan motor shaft according
to the following procedure.
1) Hold the centre of the bracket which supports the
shaft of the fan motor on a flat table.
2) Install the fan blade to the shaft of fan motor by
pushing the fan blade with a small, light weight, ball
peen hammer or rubber mallet.
CAUTION:
• Do not hit the fan blade when installing because the bracket may be deformed.
• Make sure that the fan blade rotates smoothly
after installation.
• Make sure that the axis of the shaft is not
slanted.
2. Install the fan motor to the power angle with the two
(2) screws.
3. Re-connect the wire leads to the fan motor, referring to
the pictorial diagram.
CAUTION:
• Do not use this removed fan blade again.
Shaft
Coil
Groove joint pliers
Shaft
Stator
Gap
Rotor
Bracket
Table
These are the position
where
should
be
pinched with pliers
Axis
Stator
Center of
bracket
Rotor
Rear view
Side view
POSITIVE LOCK® CONNECTOR REMOVAL
1. CARRY OUT 3D CHECKS.
2. Push the lever of Positive lock® connector.
3. Pull down on the Positive lock® connector.
Terminal
Positive lock®
connector
1
CAUTION: WHEN YOU (SERVICE ENGNEERS) CONNECT THE POSITIVE LOCK® CONNECTORS TO THE TERMINALS, CONNECT
THE POSITIVE LOCK® SO THAT THE LEVER FACES YOU (SERVICE ENGNEERS).
Push
Lever
2
Pull down
Figure C-2. Positive lock®connector
OVEN LAMP REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire lead from the oven lamp, referring to "Positive lock® connector removal".
3. Lift up the oven lamp with release.
4. Now, the oven lamp is free.
Shaft
Axis
Stator
These are the positions
that should be pinched
with pliers.
Rotor
Figure C-3. Oven lamp
R-671 - 26
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...
POWER SUPPLY CORD REPLACEMENT
Removal
Re-install
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the green/yellow
wire to the power angle.
3. Disconnect the leads of the power supply cord from the
noise filter, referring to the Figure C-4(a).
4. Release the power supply cord from the power angle.
5. Now, the power supply cord is free.
1. Insert the moulding cord stopper of power supply cord
into the square hole of the power angle, referring to the
Figure C-4(b).
2. Install the earth wire lead of power supply cord to the
power angle with one (1) screw and tight the screw.
3. Connect the brown and blue wire leads of power supply
cord to the noise filter correctly, referring to the Pictorial
Diagram.
POWER SUPPLY CORD
POWER ANGLE
SCREW
GREEN / YELLOW
WIRE
POWER
SUPPLY CORD
RED WHT
BROWN WIRE
N
TP
15 A
L
BLUE WIRE
MOULDING
CORD STOPPER
TL
CHASSIS
SUPPORT
POWER ANGLE
F8A
SQUARE HOLE
NOISE FILTER
Figure C-4 (a) Replacement of Power Supply Cord
Figure C-4(b). Power Supply Cord Replacement
TOP HEATING ELEMENT REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the two (2) screws holding the two (2) terminals of the main wire harness to the top heating
element.
3. Remove the two (2) screws holding the two (2) grill
heater angles to the top of the oven cavity.
4. Remove the two (2) grill heater angles from the oven
cavity.
5. Remove the top heating element from the top of the
oven cavity.
6. Now the top heating element is free.
BOTTOM HEATING ELEMENT REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the turntable motor cover from the power
angle, referring to "TURNTABLE MOTOR REPLACEMENT".
3. Disconnect the wire leads from the bottom heating
element.
4. Remove the two (2) nuts holding the bottom heating
element to the oven cavity.
5. Remove the heater cover and the heater packing from
the bottom heating element.
6. Remove the bottom heating element from the oven
cavity .
PRIMARY LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to "CONTROL PANEL ASSEMBLY REMOVAL".
3. Remove the open lever from the oven cavity front plate
by removing the control panel assembly.
4. Disconnect the leads from all switches.
5. Remove the one (1) screw holding the latch hook to the
oven cavity.
6. Remove the latch hook.
7. Remove the switch(es) from the latch hook by pushing
the retaining tab backwards slightly and turning the
switch(es) on the post.
8. Now the switch(es) is free.
LATCH HOOK
MONITOR SWITCH
Tab
Post
Post
PRIMARY
(MONITORED)
LATCH SWITCH
Tab
Post
Tab
STOP SWITCH
Figure C-5. Switches
R-671 - 27
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...
PRIMARY LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
If the primary latch switch, stop switch and monitor switch
do not operate properly due to a mis-adjustment, the
following adjustment should be made.
1. CARRY OUT 3D CHECKS.
2. Loosen the one (1) screw holding the latch hook to the
oven cavity front flange.
3. With the door closed, adjust the latch hook by moving
it back and forward or up and down. In and out play of
the door allowed by the latch hook should be less than
0.5 mm. The horizontal position of the latch hook
should be placed where the monitor switch has activated with the door closed. The vertical position of the
latch hook should be placed where the primary latch
switch and stop switch have activated with the door
closed.
4. Secure the screws with washers firmly.
5. Make sure of the primary latch switch, stop switch and
monitor switch operation. If those switches have not
activated with the door closed, one (1) screw holding
latch hook to oven cavity front flange and adjust the
latch hook position.
results (play of the door) should be less than 0.5mm.
2. The contacts (COM-NO) of the primary latch switch
and stop switch interrupt the circuit before the door can
be opened.
3. The contacts (COM-NC) of the monitor switch close
when the door is opened.
4. Re-install outer case and check for microwave leakage
around the door with an approved microwave survey
meter. (Refer to Microwave Measurement Procedure.)
LATCH HOOK
MONITOR SWITCH
DOOR
LATCH
HEADS
After adjustment, make sure of following:
PRIMARY
(MONITORED)
LATCH SWITCH
STOP SWITCH
DOOR OPEN BUTTON
OPEN LEVER
1. In and out play of door remains less than 0.5 mm when
latched position. First check latch hook position, pushing and pulling the door toward the oven face. The
Figure C-6 Latch Switches Adjustment
DOOR REPLACEMENT
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Push the open button and open the door slightly.
3. Insert an putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door PANEL as
shown in Figure C-7 to free engaging parts.
5. Release choke cover from door panel.
6. Now choke cover is free.
head.
12.Now, latch head and latch spring are free.
13.Remove the two (2) screws holding the glass stopper
to the door frame.
14.Remove the glass stopper from the door frame.
15.Slide the front door glass leftwards and then slide
upwards to release the tabs holding it.
16.Now, the front door glass is free
RE-INSTALL
1. Re-install the front door glass to the door frame as
follows.
1)
Insert
the upper edge of the front door glass into the five
DOOR PANEL
(5) tabs of the door frame.
2) Slide the front door glass downwards and insert the
lower edge of the front door glass into the five (5) tabs
of the door frame.
3) Slide the front door glass rightwards and insert the right
edge of the front door glass into the one (1) long tab of
PUTTY KNIFE
the door frame.
2.
Re-install
the glass stopper o the door frame as follows.
CHOKE COVER
1) Re-install the glass stopper to the door frame so that
the two (2) holes of the glass stopper meet the two (2)
DOOR FRAME
pins of the door frame.
2)
Hold
the glass stopper to the door frame with the two
7. Release two (2) pins of door panel from two (2) holes
(2)
screws.
of upper and lower oven hinges by lifting up.
3. Re-install the latch spring to the latch head. Re-install
8. Now, door sub assembly is free from oven cavity.
the latch spring to the door frame. Re-install latch head
9. Remove the four (4) screws holding the door panel to
to door frame.
the door frame.
4.
Hold
the door panel to the door frame with four (4)
10.Now, door panel is free.
screws.
11.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
Figure C-7. Door Disassembly
R-671 - 28
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...
5. Catch two (2) pins of door panel on two (2) hole of upper
and lower oven hinges.
6. Re-install choke cover to door panel by pushing.
Note: After any service to the door;
(A) Make sure that door sensing switch and primary
latch switch are operating properly. (Refer to
chapter "Test Procedures".).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave radiation emission limitation standards.
(Refer to Microwave Measurement Procedure.)
After any service, make sure of the following :
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through centre of
latch hole.
2. Deviation of door alignment from horizontal line of
cavity face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity
face plate.
4. Check for microwave leakage around door with an
approved microwave survey meter. (Refer to Microwave Measurement Procedure.)
Note:
The door on a microwave oven is designed to act
as an electronic seal preventing the leakage of
microwave energy from oven cavity during cook
cycle. This function does not require that door be
air-tight, moisture (condensation)-tight or lighttight. Therefore, occasional appearance of moisture, light or sensing of gentle warm air movement
around oven door is not abnormal and do not of
themselves, indicate a leakage of microwave energy from oven cavity.
Figure C-8. Door Replacement
PIN
UPPER
OVEN HINGE
DOOR SUB
ASSEMBLY
DOOR
PANEL
LOWER
OVEN HINGE
CHOKE COVER
PIN
LOWER
OVEN HINGE
R-671 - 29
MICROWAVE MEASUREMENT
After adjustment of door latch switches, monitor switch
and door are completed individually or collectively, the
following leakage test must be performed with a survey
instrument and it must be confirmed that the result meets
the requirements of the performance standard for microwave oven.
2.
3.
REQUIREMENT
The safety switch must prevent microwave radiation emission in excess of 5mW/cm2 at any point 5cm or more from
external surface of the oven.
PREPARATION FOR TESTING:
Before beginning the actual test for leakage, proceed as
follows;
1. Make sure that the test instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement
for instrumentations as prescribed by the performance
standard for microwave ovens must be used for testing.
4.
5.
6.
Recommended instruments are:
NARDA 8100
NARDA 8200
HOLADAY HI 1500
SIMPSON 380M
Place the oven tray into the oven cavity.
Place the load of 275 ± 15ml of water initially at 20
± 5˚C in the centre of the oven tray. The water
container should be a low form of 600 ml beaker with
inside diameter of approx. 8.5cm and made of an
electrically non-conductive material such as glass
or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that
any leakage is measured accurately.
Close the door and turn the oven ON with the timer set
for several minutes. If the water begins to boil before
the survey is completed, replace it with 275ml of cool
water.
Move the probe slowly (not faster that 2.5cm/sec.)
along the gap.
The microwave radiation emission should be measured at any point of 5cm or more from the external
surface of the oven.
SHARP
mW cm 2
mW cm 2
Microwave leakage measurement at 5 cm distance
R-671 - 30
TEST DATA AT A GLANCE
PARTS
Special fuse
Fuse
Thermal cut-out (HVT)
Thermal cut-out (OVEN)
Grill heating element (top)
Bottom heating element
Oven lamp
High voltage capacitor
Magnetron
Power transformer
SYMBOL
F1
F2
TC1
TC2
GH1
GH2
OL
C
MG
T
VALUE / DATA
15A / 250V
F 8A
145°C Off / 115˚C On
150°C Off / 130˚C On
Approx. 76 Ω / Insulation resistance > 10 MΩ
Approx. 132 Ω / Insulation resistance > 10 MΩ
230–240 V 25W
AC 2100V 1.02µF
Filament < 1Ω / Filament – chassis ∞ ohm.
Filament winding < 1Ω
Secondary winding Approx. 143 Ω / Primary winding Approx. 2.6 Ω
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.
R-671 - 31
N
RY6
RY2
CONTROL UNIT
SW1: PRIMARY LATCH SWITCH
R-671 - 32
NC.
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-1(c) Oven Schematic-OFF Condition after the oven door is closed.
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
NC.
GH1: GRILL HEATING(TOP) ELEMENT
SW1: PRIMARY LATCH SWITCH
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
GH1: GRILL HEATING(TOP) ELEMENT
GH2: BOTTOM HEATING ELEMENT
NC.
TURNTABLE MOTOR
SW1: PRIMARY LATCH SWITCH
TTM
RY2
OVEN LAMP
FAN MOTOR
TURNTABLE MOTOR
TTM
OVEN LAMP
FM
A1
N.O.
COM.
N.O.
COM.
A9
N.O.
COM.
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
GH1: GRILL HEATING(TOP) ELEMENT
GH2: BOTTOM HEATING ELEMENT
OL
CONTROL UNIT
FAN MOTOR
A7
RY5
GH2: BOTTOM HEATING ELEMENT
CONTRL OUNIT
FM
B1
B2
A5
T/C TRANSFORMER
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
680 k/ 0.5W
"
TURNTABLE MOTOR
OL
A3
TC2:
THERMAL
CUT-OUT
(OVEN)
4700p/ 250V
L
NOISE SUPPRESSION COIL
10M/ 0.5W
F1: FUSE 15A
LIVE
BRN/15
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. PLUGGED IN OVEN.
3. NOTHING APPEARS ON DISPLAY.
TTM
RY3
N.O.
COM.
N.O.
COM.
A9.
N.O.
COM.
EARTH
0.22µ/250V
RY2
FAN MOTOR
RY5
A7
RY3
N.O.
B1
A1
N
G-Y/15
RY3
OVEN LAMP
RY4
FM
RY5
A7
RY1
N.O.
NOISE
FILTER
B2
RY4
COM.
RY6
COM.
RY1
A5
T/C TRANSFORMER
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
680 k/ 0.5W
NOISE
FILTER
A9
N.O.
COM.
A3
TC2:
THERMAL
CUT-OUT
(OVEN)
4700p/ 250V
L
NOISE SUPPRESSION COIL
10M/ 0.5W
F1: FUSE 15A
NEUTRAL
230V ~ 50Hz
RY4
B1
A1
EARTH
0.22µ/250V
LIVE
BLU/15
RY6
B2
T/C TRANSFORMER
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
N
G-Y/15
BRN/15
230V ~ 50Hz
RY1
A5
L
NEUTRAL
BLU/15
NOISE
FILTER
OL
A3
TC2:
THERMAL
CUT-OUT
(OVEN)
10M/ 0.5W
F1: FUSE 15A
LIVE
BRN/15
230V ~ 50Hz
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22µ/250V
EARTH
G-Y/15
4700p/ 250V
NEUTRAL
BLU/15
CIRCUIT DIAGRAMS
Note:
AC CORD CONNECTION
BRN : BROWN
BLU : BLUE
G-Y : GREEN AND YELLOW STRIPE
/15 :
SECTIONAL AREA OF 1.5mm2 MIN.
" Indicates components with potential
above 250 V.
F2: FUSE F8A
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-1(a) Oven Schematic-OFF Condition right after the oven is plugged in.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. "
. 0 " FLASHES ON DISPLAY.
F2: FUSE F8A
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-1(b) Oven Schematic-OFF Condition when the oven door is opened.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. DISPLAY DTOPS FLASHING.
F2: FUSE F8A
N
RY6
R-671 - 33
RY3
RY2
CONTROL UNIT
SW1: PRIMARY LATCH SWITCH
NC.
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-3(b) Oven Schematic-Grill cooking Condition (BOTTOM GRILL mode)
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
GH1: GRILL HEATING(TOP) ELEMENT
NC.
GH2: BOTTOM HEATING ELEMENT
SW1: PRIMARY LATCH SWITCH
TURNTABLE MOTOR
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
GH1: GRILL HEATING(TOP) ELEMENT
GH2: BOTTOM HEATING ELEMENT
TURNTABLE MOTOR
NC.
TTM
OVEN LAMP
SW1: PRIMARY LATCH SWITCH
TTM
OL
RY2
FAN MOTOR
N.O.
COM.
N.O.
COM.
A9
N.O.
COM.
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
L
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
GH1: GRILL HEATING(TOP) ELEMENT
GH2: BOTTOM HEATING ELEMENT
TURNTABLE MOTOR
TTM
OVEN LAMP
FM
A7
A1
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
680 k/ 0.5W
T/C TRANSFORMER
CONTROL UNIT
FAN MOTOR
OL
B1
B2
A5
10M/ 0.5W
F1: FUSE 15A
LIVE
BRN/15
NOISE SUPPRESSION COIL
RY2
FAN MOTOR
CONTROL UNIT
FM
RY5
A7
RY3
N.O.
COM.
N.O.
COM.
A9
N.O.
COM.
A3
TC2:
THERMAL
CUT-OUT
(OVEN)
4700p/ 250V
0.22µ/250V
RY5
N.O.
B1
A1
N
EARTH
G-Y/15
230V ~ 50Hz
RY3
OVEN LAMP
RY4
FM
RY5
A7
RY1
COM.
NOISE
FILTER
B2
RY4
N.O.
RY6
A5
RY1
COM.
A3
T/C TRANSFORMER
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
680 k/ 0.5W
NOISE
FILTER
A9
N.O.
COM.
L
NOISE SUPPRESSION COIL
10M/ 0.5W
F1: FUSE 15A
RY6
B1
A1
TC2:
THERMAL
CUT-OUT
(OVEN)
4700p/ 250V
0.22µ/250V
NEUTRAL
BLU/15
RY4
B2
T/C TRANSFORMER
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
N
EARTH
G-Y/15
LIVE
BRN/15
230V ~ 50Hz
RY1
A5
L
NEUTRAL
BLU/15
NOISE
FILTER
OL
A3
TC2:
THERMAL
CUT-OUT
(OVEN)
10M/ 0.5W
F1: FUSE 15A
LIVE
BRN/15
230V ~ 50Hz
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22µ/250V
EARTH
G-Y/15
4700p/ 250V
NEUTRAL
BLU/15
CIRCUIT DIAGRAMS CONT...
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. MICROWAVE COOKING MODE SELECTED.
3. POWER LEVEL CHOSEN.
4. COOKING TIME ENTERED.
5. STRAT BUTTON PRESSED.
F2: FUSE F8A
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-2 Oven Schematic-Microwave cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. TOP GRILL COOKING MODE SELECTED.
3. COOKING TIME ENTERED.
4. STRAT BUTTON PRESSED.
F2: FUSE F8A
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-3(a) Oven Schematic-Grill cooking Condition (TOP GRILL mode)
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. BOTTOM GRILL COOKING MODE SELECTED.
3. COOKING TIME ENTERED.
4. STRAT BUTTON PRESSED.
F2: FUSE F8A
N
RY6
R-671 - 34
RY3
RY2
CONTROL UNIT
SW1: PRIMARY LATCH SWITCH
NC.
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-4(b) Oven Schematic-Dual cooking Condition (Microwave and Bottom Grill mode)
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
GH1: GRILL HEATING(TOP) ELEMENT
NC.
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
GH1: GRILL HEATING(TOP) ELEMENT
GH2: BOTTOM HEATING ELEMENT
TURNTABLE MOTOR
NC.
GH2: BOTTOM HEATING ELEMENT
SW1: PRIMARY LATCH SWITCH
TTM
OVEN LAMP
SW1: PRIMARY LATCH SWITCH
TURNTABLE MOTOR
OL
FAN MOTOR
TURNTABLE MOTOR
TTM
OVEN LAMP
FM
A7
A1
N.O.
COM.
N.O.
COM.
A9
N.O.
COM.
H.V. RECTIFIER
C:
CAPACITOR
1.2µF
AC2100V
MG:
MAGNETRON
T: HIGH VOLTAGE
TRANSFORMER
GH1: GRILL HEATING(TOP) ELEMENT
GH2: BOTTOM HEATING ELEMENT
OL
CONTROL UNIT
FAN MOTOR
RY2
FAN MOTOR
N.O.
B1
T/C TRANSFORMER
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
RY2
TTM
RY4
COM.
L
Indicates components with potential above 250 V.
OVEN LAMP
CONTROL UNIT
FM
RY5
A7
RY3
N.O.
B1
N.O.
B2
A5
10M/ 0.5W
F1: FUSE 15A
LIVE
BRN/15
NOISE SUPPRESSION COIL
680 k/ 0.5W
RY5
FM
RY5
A7
RY1
COM.
A9
N.O.
COM.
A3
TC2:
THERMAL
CUT-OUT
(OVEN)
4700p/ 250V
0.22µ/250V
EARTH
G-Y/15
RY3
COM.
NOISE
FILTER
N.O.
RY6
B2
RY4
COM.
RY1
A5
A1
NOISE
FILTER
A9
N.O.
COM.
T/C TRANSFORMER
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
N
RY6
B1
A1
A3
TC2:
THERMAL
CUT-OUT
(OVEN)
L
NEUTRAL
RY4
B2
T/C TRANSFORMER
TC1:
THERMAL
CUT-OUT
(HVT.)
4700p/ 250V
4700p/ 250V
10M/ 0.5W
F1: FUSE 15A
LIVE
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22µ/250V
EARTH
G-Y/15
BRN/15
230V ~ 50Hz
RY1
A5
L
N
NEUTRAL
BLU/15
BLU/15
NOISE
FILTER
OL
A3
TC2:
THERMAL
CUT-OUT
(OVEN)
10M/ 0.5W
F1: FUSE 15A
LIVE
BRN/15
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22µ/250V
EARTH
G-Y/15
4700p/ 250V
NEUTRAL
BLU/15
230V ~ 50Hz
230V ~ 50Hz
CIRCUIT DIAGRAMS CONT...
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. TOP AND BOTTOM GRILL COOKING MODE SELECTED.
3. COOKING TIME ENTERED.
4. STRAT BUTTON PRESSED.
F2: FUSE F8A
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-3(c) Oven Schematic-Grill cooking Condition (TOP AND BOTTOM GRILL mode)
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. DUAL 1 COOKING MODE SELECTED.
3. POWER LEVEL SELECTED.
4. COOKING TIME ENTERED.
5. STRAT BUTTON PRESSED.
F2: FUSE F8A
SW2:
STOP SWITCH
NC.
SW3:
MONITOR SWITCH
Figure O-4(a) Oven Schematic-Dual cooking Condition (Microwave and Top Grill mode)
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. DUAL 2 COOKING MODE SELECTED.
3. POWER LEVEL SELECTED.
4. COOKING TIME ENTERED.
5. STRAT BUTTON PRESSED.
F2: FUSE F8A
G
R
Y
Y
L
W
R-671 - 35
RY4
COM
RY3
RY6
RY1 COM
COM
RY2
1
CN-C
11
9
T1
CN-A
RY5
1
CN-B
2
CONTROL UNIT
1
CN-A
BRN
RED
BLK
BLK
RED
BLK
ORG
GRN
RED
GRY
WHT
BLU
YLW
RED
GRN
CN-B
GRN
1
2
3
4
5
6
7
9
8
1
2
WHT
BLU
GRY
RED
GRY
GRY
TTM: TURNTABLE
MOTOR
GH2: BOTTOM
HEATING
ELEMENT
WHT
YLW
RED
ORG
WHT
BLU
TC2:
THERMAL
CUT-OUT(OVEN)
GH1: TOP GRILL
HEATING ELEMENT
ORG
Figure S-1. Pictrorial Diagram
GRN
SW2: STOP
SWITCH
NO
RED
NC
COM
COM
COM
SW1: PRIMARY
LATCH
SWITCH
SW3:
MONITOR
SWITCH
N.C.
WHT
RED
WHT
BRN
RED
TC1:
THERMAL
CUT-OUT(HVT)
ORG
WHT
OL:
OVEN LAMP
WHT
WHT
WHT
YLW
GRY
YLW
L
N
TL
BLU
F8A
WHT
WHT
FM:
FAN MOTOR
BRU
G/Y
POWER SUPPLY CORD
T: HIGH VOLTAGE
TRANSFORMER
H.V.WIRE B
H.V.
RECTIFIER
H.V.WIRE A
MG: MAGNETRON
C:
H.V.
CAPACITOR
HIGH VOLTAGE COMPONENTS
BLK
RED
WHT
NEUTRAL
LIVE
NOISE FILTER
TP
BRN
15 A
WHT
RED WHT
YLW
CIRCUIT DIAGRAMS CONT...
HIGH
VOLTAGE
TRANSFORMER
TOP
HEARTING
ELEMENT
BOTTOM
HEARTING
ELEMENT
FAN
MOTOR
c
a
4
Q3
2SB1238
RY2
RY3
RY1
RY4
RY5
RY6
b
10G471K
8
6
D2
D1
R9 1k
: 0.1µ / 16v
: 1/4w ± 5%
: 1SS270A
NOTE : IF NOT SPECIFIED
N.O.
COM
N.O.
COM
N.O.
COM
A9
A7
A5
A3
VRS1
d
(J1)
AC230V
50Hz
T1
C3
0.1µ/50v
1
D4
D3
C1 0.1µ/50v
–
+
CN-B
R10 240
2
R40 3.3k
R2 510 1w
(J8)
C20 0.1µ/50v
ZD1 HZ5C-2
SW60
–
+
C6 10µ/35v
B
C
CN-C 6
R4 4.7k
R52 100k
R53 100k
R51 4.7k
R50 4.7k
R30 15k
Encoder
A
Q1
DTA123ES
C4
2
1
AUTO
LD5
LD5
C53
C52
VC
GND
Figure S-2. Control Panel Circuit
Q21 DTA143ES
DOOR
1
SP1
Q4
2SB1238
R1 510 1w
C21
10µ
/35v
C2 1000µ/35v
D26 11ES1
Q25 DTA143ES
Q23 DTA143ES
Q22 DTD143ES
Q24 DTD143ES
Q26 DTA143ES
Q20 DTA143ES
Q2
DTA143ES
–
+
LD1 LD2 LD3 LD4
–
Q40
DTA143ES
C5
WH-2
(J4)
Back Light
R5 4.7k
(J2)
(J3)
A1
D20
D25
D24
D21
D23
D22
ZD3
HZ20-1
+
ZD2
HZ4A2
R31 4.7k
(J6)
(J5)
R80 1.5k
D1-4
11ES1
D30
(J7)
5
VR1
10k
4
R8 10k R7 10k R6 10k
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
WH-B
3
CF1
CST4.00MGW
R12 4.7k
VL2
VL1
AN7
AN6
AN5
AN4
AN3
AN2
P61
P60
P57
P56
P55
P54
P53
P52
P51
P50
P47
P46
P45
P44
INT1
INT0
C7 0.1µ/50v
VL3
COM0
COM1
COM2
COM3
AVSS
VREF
VCC
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
I-1
IZA909DR
M38223M4
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
8
SW7
AUTO
COOK WATT
SW8
AUTO
DEF
SW9
7
P41
P40
RESET
P71
P70
XIN
XOUT
VSS
P27
P26
P25
P24
P23
P22
P21
P2 0
R69 15k
R-671 - 36
R70 15k
C30
11
10
9
64 SEG8
63 SEG9
62 SEG10
61 SEG11
60 P34
59 P35
58 P36
57 P37
56 P00
55 P01
54 P02
53 P03
52 P04
51 P05
50 P06
49 P07
48 P10
47 P11
46 P12
45 P13
44 P14
43 P15
42 P16
41 P17
SW2
3
START 9
+ 1 min
7
STOP
SW3
5
SW1
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
R68 15k
CN-A
8
6 4
C3
C2
C1
10
2
CR60
1
CIRCUIT DIAGRAMS CONT...
SW1
A
B
C
( CPU UNIT )
Figure S-3. Printed Wiring Board
R-671 - 37
SW1
R50
VR1
R51
( KEY AND JOG UNIT )
WH - B
C51
C50
20
SW8
SW9
SW4
SW5
SW6
LD5
SW7
R52
R53
DCUT
A
1
2
3
21
22
23
24
WH - B
C51
C50
20
R51
B
C
R50
VR1
SW8
SW9
SW4
SW5
SW6
LD5
SW7
R52
R53
1
2
3
21
22
23
24
CIRCUIT DIAGRAMS CONT...
DCUT
PARTS LIST
Note: The parts marked "∆" may cause undue microwave exposure. / The parts marked "*" are used in
voltage more than 250V. / "§" Mark: Spare parts delivery section.
ELECTRIC PARTS
*
∆*
*
*
REF. NO.
C
F1
F2
FM
GH1
GH2
MG
OL
SW1
SW2
SW3
T
TC1
TC2
TTM
1- 1
1- 2
1- 3
PART NO.
RC-QZA207WRE0
QFS-B0019MRE0
QFS-CA024WRE0
RMOTEA360WRE0
RHET-A206WRE0
RHET-A210WRE0
RV-MZA279WRE0
RLMPTA066WRE0
QSW-MA112WRE0
QSW-MA110WRE0
QSW-MA112WRE0
RTRN-A010URE0
RTHM-A108WRE0
RTHM-A099WRE0
RMOTDA227WRE0
RH-DZA048WRE0
FPWBFA309WRE1
QACCVA004URE1
§
U
U
U
U
U
U
U
U
J
J
J
U
U
U
U
U
U
U
DESCRIPTION
High voltage capacitor
Fuse 15A
Fuse F8A
Fan motor
Top heating element
Bottom heating element
Magnetron
Oven lamp
Primary latch switch
Stop switch
Monitor switch
High voltage transformer
Thermal cut-out 145˚C off 115˚C on (HVT)
Thermal cut-out 150˚C off 130˚C on (OVEN)
Turntable motor
High voltage rectifier
Noise filter
Power supply cord
Q'TY
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CODE
AS
AC
AC
AU
AX
AX
BD
AK
AN
AK
AN
BG
AG
AH
AU
AM
AT
AQ
U
U
U
U
Outer case cabinet R-671(B)
Outer case cabinet R-671(W)
Outer case cabinet R-671(IN)
Foot
1
1
1
2
AT
AW
AY
AB
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
J
U
U
U
U
U
U
U
U
U
U
U
Control unit
5-pin connector (CN-A)
2-pin connector (CN-B)
11-pin connector (CN-C)
Liquid crystal display
LCD holder
LED sheet
2-pin harness (WH-A)
11-pin harness (WH-B)
Capacitor
0.1 uF
50V
Capacitor
1000 uF
35V
Capacitor
0.1 uF
50V
Capacitor
0.01 uF
16V
Capacitor
10 uF
35V
Capacitor
0.1 uF
50V
Capacitor
0.1 uF
50V
Capacitor
10 uF
35V
Capacitor
0.01 uF
16V
Capacitor
0.01 uF
16V
Ceramic resonator (CST4.00MGW)
Capacitor array
Diode (11ES1)
Diode (1SS270A)
Diode (11ES1)
Diode (1SS270A)
LSI
Light emitting diode
Light emitting diode
Transistor (DTA123ES)
Transistor (DTA143ES)
Transistor (2SB1238)
Transistor (DTA143ES)
Transistor (DTD143ES)
Transistor (DTA143ES)
Transistor (DTA143ES)
Transistor (DTA143ES)
Transistor (DTA143ES)
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2
1
1
4
6
1
1
1
4
1
1
1
2
2
1
2
1
1
1
BL
AC
AB
AC
AK
AC
AC
AK
AN
AB
AB
AB
AA
AB
AB
AA
AB
AA
AA
AD
AG
AB
AA
AB
AA
AS
AC
AC
AB
AB
AD
AB
AC
AB
AB
AB
AB
CABINET PARTS
2222-
1
1
1
2
GCABUA010URP0
GCABUA471WRT0
GCABUA026URP0
GLEGPA057WRE0
CONTROL PANEL PARTS
3- 1
3- 1A
3- 1B
3- 1C
3- 1D
3- 1E
3- 1F
3- 1G
3- 1H
C1
C2
C3
C4-5
C6
C7
C20
C21
C30
C52-53
CF1
CR60
D1-4
D20-25
D26
D30
I-1
LD1-4
LD5
Q1
Q2
Q3-4
Q20-21
Q22
Q23-24
Q25
Q26
Q40
DPWBFB840WRK0
QCNCMA453DRE0
QCNCMA414DRE0
QCNCMA335DRE0
RLCDSA036DRE0
LHLD-A187WRF0
PSHEPA569WRE0
FW-VZA240DRE0
FW-VZA241DRE0
RC-KZA087DRE0
VCEAB31VW108M
RC-KZA087DRE0
VCKYD41CY103N
VCEAB31VW106M
RC-KZA087DRE0
VCEAB31HW104M
VCEAB31VW106M
VCKYD41CY103N
VCKYD41CY103N
RCRS-A012DRE0
RMPTEA011DRE0
VHD11ES1///-1
VHD1SS270A/-1
VHD11ES1///-1
VHD1SS270A/-1
RH-IZA909DRE0
VHPSLZ781C9-3
VHPLTL1CHE/-3
VSDTA123ES/-3
VSDTA143ES/-3
VS2SB1238//-3
VSDTA143ES/-3
VSDTD143ES/-3
VSDTA143ES/-3
VSDTA143ES/1B
VSDTA143ES/-3
VSDTA143ES/-3
R-671 - 38
PARTS LIST CONT...
CONTROL PANEL PARTS CONT...
∆
REF. NO.
R1-2
R4-5
R6-8
R9
R10
R12
R30
R31
R40
R50-51
R52-53
R68-70
R80
RY1
RY2
RY3
RY4
RY5-6
SP1
SW4-9
T1
VR1
VRS1
ZD1
ZD2
ZD3
3- 2
3- 2
3- 2
3- 3
3- 3
3- 3
3- 4
3- 5
3- 6
3- 6
3- 6
3- 7
3- 7
3- 7
3- 8
3- 8
3- 8
3- 9
3- 10
3- 11
3- 11
3- 11
3- 12
3- 12
3- 12
3- 13
3- 14
PART NO.
VRS-B13AA511J
VRD-B12EF472J
VRD-B12EF103J
VRD-B12EF102J
VRD-B12EF241J
VRD-B12EF472J
VRD-B12EF153J
VRD-B12EF472J
VRD-B12EF332J
VRD-B12EF472J
VRD-B12EF104J
VRD-B12EF153J
VRD-B12EF152J
RRLY-A076DRE0
RRLY-A092DRE0
RRLY-A076DRE0
RRLY-A115DRE0
RRLY-A080DRE0
RALM-A014DRE0
QSW-PA016DRE0
RTRNPA105DRE0
RVR-BA014DRE0
RH-VZA032DRE0
VHEHZ5C2///-1
VHEHZ4A2///-1
VHEHZ201///-1
HPNLCB010URR0
HPNLCS005URR0
HPNLCW019URR0
JBTN-B014URF0
JBTN-K019URF0
JBTN-W008URF0
MSPRCA045WRE0
GMADIA015URR0
JBTN-B003URF0
JBTN-G001URF0
JBTN-K020URF0
JBTN-B004URR0
JBTN-K016URR0
JBTN-W010URR0
JBTN-B007URF0
JBTN-K018URF0
JBTN-W013URF0
JBTN-K008URF0
JBTN-O004URR0
JKNBKB003URF0
JKNBKK004URF0
JKNBKW003URF0
JKNBKB004URF0
JKNBKK003URF0
JKNBKW004URF0
MSPR-A002URE0
XEPSD30P10XS0
§
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
DESCRIPTION
Resistor
510 ohm
1W
Resistor
4.7k ohm
1/4W
Resistor
10k ohm
1/4W
Resistor
1.0k ohm
1/4W
Resistor
240 ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
15k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
3.3k ohm
1/4W
Resistor
4.7k ohm
1/4W
Resistor
100k ohm
1/4W
Resistor
15k ohm
1/4W
Resistor
1.5k ohm
1/4W
Relay (OMIF-S-124LM)
Relay (VRB18SP)
Relay (OMIF-S-124LM)
Relay (JV-24S-KT)
Relay (OJ-SH-124LM)
Buzzer (PKM22EPT-THAI)
Tact switch
Transformer
Potentiometer
Varistor (10G471K)
Zener diode (HZ5C2)
Zener diode (HZ4A2)
Zener diode (HZ20-1)
Control panel [R-671(B)]
Control panel [R-671(IN)]
Control panel [R-671(W)]
Open button [R-671(B)]
Open button [R-671(IN)]
Open button [R-671(W)]
Open button spring
Display window
Start button [R-671(B)]
Start button [R-671(W)]
Start button [R-671(IN)]
Auto/Def button [R-671(B)]
Auto/Def button [R-671(IN)]
Auto/Def button [R-671(W)]
Watt/Stop button [R-671(B)]
Watt/Stop button [R-671(IN)]
Watt/Stop button [R-671(W)]
More/Less button
Pizza button
Select knob [R-671(B)]
Select knob [R-671(IN)]
Select knob [R-671(W)]
Timer knob [R-671(B)]
Timer knob [R-671(IN)]
Timer knob [R-671(W)]
Switch spring
Screw; 3mm x 10mm
U
U
U
U
U
U
U
U
U
U
U
H.V. Capacitor holder
Power angle
Oven cavity
Turntable shaft assembly
Vibration proof cushion
Exhaust duct angle
Exhaust duct
Latch hook
Fan blade
Chassis support
Turntable motor angle
Q'TY
2
2
3
1
1
1
1
1
1
2
2
3
1
1
1
1
1
2
1
6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
12
CODE
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AK
AP
AK
AK
AG
AG
AB
AR
AD
AC
AB
AB
AB
AN
AN
AN
AE
AE
AE
AA
AE
AC
AC
AC
AE
AE
AE
AC
AC
AE
AC
AD
AF
AE
AE
AF
AE
AE
AB
AA
1
1
1
1
1
1
1
1
1
1
1
AD
AC
BL
AM
AA
AE
AL
AH
AM
AE
AD
OVEN PARTS
∆
∆
∆
4- 1
4- 2
4- 3
4- 4
4- 5
4- 6
4- 7
4- 8
4- 9
4-10
4-11
LBNDKA111WRP0
LANGTA004URP0
DOVN-A012URY0
FANGTA002URY0
PSPAGA001WRE0
LANGQA010URP0
PDUC-A006URP0
PHOK-A092WRF4
NFANJA029WRE0
LANGFA169WRP5
LANGQA006URP0
R-671 - 39
PARTS LIST CONT...
OVEN PARTS CONT...
∆
*
*
REF. NO.
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
4-28
PART NO.
LANGQA007URP0
LANGQA008URP0
MLEVFA078WRF0
MSPRCA004URE0
PCOVPA309WRE0
PCOVQA002URP0
PCUSGA360WRP0
PCUSUA020URE0
PDUC-A005URP0
PDUC-A581WRF3
PDUC-A638WRF2
PGSK-A001URE0
PPACGA001URE0
PSKR-A003URF0
PCUSGA003URP0
PCUSUA021URE0
PCLI-A001URE0
§
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
DESCRIPTION
Air duct angle
Grill heater angle
Open lever
Sealed spring
Waveguide cover
Heater cover
HVT cushion
Cushion
Air duct
Air intake duct
Fan duct
O-ring gasket
Heater packing
Rear barrier
Cushion (TTM cover)
Door cushion
Harness clip
Q'TY
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
CODE
AG
AD
AE
AA
AC
AD
AA
AA
AG
AE
AE
AB
AD
AE
AC
AC
AA
U
U
U
U
U
U
U
U
U
U
Door panel assembly
Choke cover
Door frame R-671(B)
Door frame R-671(W)
Door frame R-671(IN)
Glass stopper
Latch head
Latch spring
Front door glass
Screw : 3mm x 6mm
1
1
1
1
1
1
1
1
1
6
AY
AK
AY
AY
AY
AB
AD
AA
AS
AA
U
U
U
U
U
U
U
U
U
U
U
U
Operation manual
Operation manual (R-671(W)N)
Turntable
Trivet (Rack)
High voltage wire B
High voltage wire A
Stop switch harness
Main harness
Wire tie
P-clip
Caution label
Quick start guide
1
1
1
1
1
1
1
1
1
1
1
1
AM
AM
AY
AR
AE
AF
AF
AT
AB
AA
AE
AM
HVT screw
Rivet
Nut
Screw: 4mm x 6mm
Screw: 4mm x 8mm
Screw: 4mm x 8mm
Screw: 4mm x 10mm
Screw: 4mm x 12mm
Screw: 4mm x 12mm R-671(B)
Screw: 4mm x 12mm R-671(W)
Screw: 4mm x 12mm R-671(IN)
TTM cover screw
Screw: 3mm x 5mm
Screw: 3mm x 10mm
4
1
2
3
1
8
9
10
2
2
2
1
2
1
AA
AB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
DOOR PARTS
5555555555-
1
2
3
3
3
4
5
6
7
8
DDORFA001URY0
GCOVHA016URF0
GWAKPB009URR0
GWAKPW015URR0
GWAKPS006URR0
LSTPPA003URF0
LSTPPA158WRF0
MSPRTA141WRE0
PGLSPA002URE0
XEBSD30P06000
MISCELLANEOUS
6- 1
6- 1
6- 2
6- 3
6- 4
6- 5
6- 6
6- 7
6- 8
6- 9
6-10
6-11
TINS-A074URR0
TINS-A112URR0
CTNT-A001URK0
FAMI-A081WRM1
QW-QZA001URE0
QW-QZA191WRE0
FW-VZA053URE0
FW-VZA049URE1
LBNDKA004WRE0
LHLDKA008WRF0
TCAUHA006URR0
TINS-A105URR0
SCREWS,NUTS AND WASHERS
7- 1
7- 2
7- 3
7- 4
7- 5
7- 6
7- 7
7- 8
7- 9
7- 9
7- 9
7-10
7-11
7-12
LX-CZA063WRE0
LX-LZA011WRE0
LX-NZ0061WRE0
XFPSD40P06000
XHPSD40P08K00
XHTSD40P08RV0
XOTSD40P10000
XOTSD40P12RV0
XOTSF40P12000
XOTSE40P12000
XOTSE40P12000
LX-CZA030WRE0
XBPWW30P05K00
XEPSD30P10XS0
U
U
J
J
U
J
U
J
J
J
J
J
J
U
HOW TO ORDER REPLACEMENT PARTS
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER
2. REF. NO.
R-671 - 40
3. PART NO.
4. DESCRIPTION
CABINET AND UNIT CHASSIS PARTS
OVEN PARTS
7-8
7-6
6-10
4-7
2-1
7-8
7-9
7-11
4-6
7-7
OL
7-7
GH1
4-13
7-11
4-21
4-13
7-8
7-9
F2
7-2
F1
7-5
TC2
MG
4-3
1-2
4-16
4-28
4-10
4-24
4-17
4-8
7-4
7-6
GH2
SW3
7-12
4-15
SW1
6-2
4-20
7-3
4-11
SW2
7-8
7-7
4-23
4-14
4-19
4-4
7-4
4-12
7-7
TTM
7-4
1-3
1-1
7-6
4-2
7-7
4-22
4-1
7-6
1-3
7-7
FM
4-26
C
7-6
4-2
4-9
6-9
7-7
7-8
T
7-6
2-2
6-6
4-25
6-8
4-18
7-8
7-7
NOTE:
In the event of removing the turntable
motor cover, this part should be refitted using screw connection:
LX-CZS030WRE0 (Ref. # 7-10)
7-8
7-1
2-2
7-7
R-671 - 41
7-1
TC1
4-5
CONTROL PANEL/DOOR PARTS
CONTROL PANEL PARTS
3-1D
3-9
3-1E
3-1F
3-5
3-2
3-10
3-13
3-7
3-14 x 6
3-11
3-1
3-8
3-14 x 6
3-12
DOOR PARTS
3-6
3-4
3-3
5-2
4-27
5-8
5-1
5-7
5-8
5-8
5-8
5-4
5-5
5-6
5-3
R-671 - 42
MISCELLANEOUS/PACKING AND ACCESSORIES
MISCELLANEOUS
6-4
6-3
6-6
6-5
6-7
Actual wire harness may be different from illustration.
PACKING AND ACCESSORIES
TOP PAD ASSEMBLY
(FPADBA008URK0)
PRINTED MATTER
OVEN BAG
(SSAKHA041WRE0)
OUTER WRAP COVER [R-671(B)]
(SPADFA353WRE0)
RACK
DOOR PROTECTION SHEET
(SPADPA531WRE0)
TURNTABLE TRAY
ACCESSORY HOLDER
(SPADPA010URE0)
BOTTOM PAD ASSEMBLY
(FPADBA007URK0)
INTO THE
OVEN CAVITY
Not Replaceable Items.
R-671 - 43
PACKING CASE
(SPAKCA228URR0);
(SPAKCA229URR0);
(SPAKCA230URR0);
(SPAKCA237URR0);
(SPAKCA238URR0);
(SPAKCA239URR0);
(SPAKCA240URR0);
R-671(B)
R-671(W)
R-671(IN)
R-671(W)N
R-671(W)E
R-671(B)E
R-671(IN)E
®
'98 SHARP CORP. (7S1.31E) Printed in U.K.
R-671 - 44