Sharp R-671(B), R-671(IN), R-671(W), R-671(W)E, R-671(IN)E Service Manual

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TABLE OF CONTENTS

REF No PART CODE DESCRIPTION QTY CODE

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

S10212R671EHW

SERVICE MANUAL

SHARP CORPORATION

MICROWAVE OVEN WITH

TOP AND BOTTOM GRILL

MODEL 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.

SUPPLEMENT

This service manual covers only those items that differ from the S10808R671EHW. R-671(W)

AUTO

AUTO DEF

COOK

WATT

/Kg

STOP

min

R-671

R-671 - 1

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

S10808R671EHW

SERVICE MANUAL

SHARP CORPORATION



AUTO

AUTO DEF

COOK

WATT

/Kg

STOP

min

R-671

MICROWAVE OVEN WITH

TOP AND BOTTOM GRILL

MODELS

In interests of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used.

R-671(B) R-671(W) R-671(IN) R-671(W)N

R-671(W)E R-671(IN)E R-671(B)E

R-671 - 2

CAUTION

MICROW AVE RADIA TION

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 - 3

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

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.

R-671 - 4

REMEMBER TO CHECK 3D

1) Disconnect the supply.

2) Door opened, and wedged open.

3) Discharge high voltage capacitor.

WARNING: AGAINST THE CHARGE OF THE HIGH-

VOLTAGE 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.

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 4R

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.

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 compo-

nent 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.

NL 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 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.

VERGEET DE VOLGENDE 4 STAPPEN NIET

1) Sluit de draden weer aan diezijn losgehaald voor de test.

2) Plaats de buitenmantel weer om het toestel heen (kabinet).

3) Stop de stekker weer in het stopcontact.

4) 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 - 5

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

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 AL TO 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.

RECUERDE LA COMPROBACION 4C

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.

SV 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

1) Koppla från strömkällan.

2) Öppna dörren på glänt.

3) Ladda ur högspänningskondensatorn.

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.

KOM IHÅG ATT KONTROLLERA 4 STEG

1) Anslut alla ledningar som använts vid testning

2) Sätt tillbaka ytterhöljet.

3) Anslut strömkällan på nytt.

4) 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.

SERVICING CONT...

R-671 - 6

II 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 IMPORT ANTI PER INCOMINCIARE

1) Scollegare l'alimentazione elettrica.

2) Verificare che la porta sia bloccata in posizione aperta.

3) Scaricare il condensatore ad alta tensione.

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.

QUATTRO VERIFICHE IMPORTANTI DA NON DIMENTICARE

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.

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.

SERVICING CONT...

R-671 - 7

SPECIFICATION

ITEM DESCRIPTION

Power Requirements 230 Volts

50 Hertz Single phase, 3 wire earthed

Power Consumption 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.)

Power Output

800 W nominal of RF microwave energy (measured by method of IEC 705) Operating fequency 2450 MHz

Grill heating element Power Output (Top Grill)

700 W

Bottom heating element Power Output

400 W

Case Dimensions Width 450 mm

Height 298 mm including foot Depth 392 mm

Cooking Cavity Dimensions Width 296 mm

Height 203 mm

Depth 297 mm Turntable diameter 275 mm Control Complement 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 Set Weight 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 : EARTH BLUE : NEUTRAL BROWN : LIVE

PRODUCT DESCRIPTION

R-671 - 8

OVEN

9. Door seals and sealing surfaces

10.Ventilation openings

11.Outer cabinet

12.Power supply cord

13.Turntable

14.Rack

1. Control panel

2. Oven lamp

3. Grill heating element (Top Grill)

4. Door opening button

5. Waveguide cover

6. Oven cavity

7. Turntable motor shaft

8. Grill heating element (Bottom Grill)

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.

OPERATION BUTTONS

7. LESS/MORE buttons

8. PIZZA button

9. AUTO COOK button

10.AUTO DEFROST button

11.COOKING MODE selector

: MICROWAVE cooking

: 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

STOP

/Kg

AUTO

AUTO

COOK

WATT

AUTO

DEF

WATT

min

R-671

2 3

6 8

14 15

1 4 5

CONTROL PANEL

APPEARANCE VIEW

1110

R-671 - 9

OPERATION SEQUENCE

OFF CONDITION

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.

Function sequence Figure O-2 on page 33

CONNECTED COMPONENTS RELAY Oven lamp, Turntable motor RY1 High voltage transformer RY2 Grill heating element (Top) RY3 Bottom heating element RY4 Fan motor RY5 Control unit RY6

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.

Switch Contact Condition

During Oven Door Cooking Open(No cooking)

COM-NO Closed Opened

Primary latch Switch

COM-NC Opened Closed

Stop switch

COM-NO Closed Opened COM-NO Closed Opened

Monitor Switch

COM-NC 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 (COM-

NC) 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.

SETTING

800P100%

560P 70%

400P 50%

240P 30%

80P 10%

32 sec. ON

Approx. 100%

24 sec. ON 8 sec. OFF

Approx. 70%

18 sec. ON 14 sec. OFF

Approx. 50%

12 sec. ON 20 sec. OFF

Approx. 30%

6 sec. ON 26 sec. OFF

Approx. 10%

Note: 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 - 10

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:

Figure O-3(a) on page 33

1. The relay RY1 + RY3 + RY5 are energized.

2. The numbers of the digital readout start the count down to zero.

3. Then the grill heating element (top), turntable motor, oven lamp and fan motor are energized.

4. Now, the food is grilled by the grill heating element.

5. 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.

6. 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:

Figure O-3(b) on page 33

1. The relay RY1 + RY4 + RY5 are energized.

2. The numbers of the digital readout start the count down to zero.

3. Then the bottom heating element, turntable motor, oven lamp and fan motor are energized.

4. Now, the food is grilled by the bottom heating element.

5. 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.

6. 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:

Figure O-3(c) on page 34

1. The relay RY1 + RY3 + RY4 + RY5 are energized.

2. The numbers of the digital readout start the count down to zero.

3. Then the grill heating element (top), bottom heating element, turntable motor, oven lamp and fan motor are energized.

4. Now, the food is grilled by the grill heating element (top) and the bottom heating element.

5. 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.

OPERATION SEQUENCE CONT...

R-671 - 11

PIZZA COOKING

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 Limited power Time base

Cooking mode time (minutes) output (%) (seconds) Microwave (100%)

30 70 32 Top grill 30 50 48 Bottom grill 30 50 48 Top grill and 10 (Top) 50 48

Bottom grill 10 (Bottom) 50 48

Micro. (100%) 20 (Micro.) 70 48 + Top grill 15 (Grill) 50 48

Micro. (100%) 20 (Micro.) 70 48 + Bottom grill 15 (Heater) 50 48

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.

D U A L

FUNCTION OF IMPORTANT COMPONENTS

DOOR OPEN MECHANISM

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.

PRIMARY LATCH SWITCH SW1

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.

MONITOR SWITCH SW3

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.

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”).

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.

LATCH HOOK

STOP SWITCH

PRIMARY (MONITORED) LATCH SWITCH

MONITOR SWITCH

LATCH HEADS

OPEN LEVER

DOOR OPEN BUTTON

DOOR

OPERATION SEQUENCE CONT...

R-671 - 12

SPECIAL FUSE F1 15A

If the wire harness or electrical components are shortcircuited, this fuse

F1 blows to prevent an electric shock of

fire hazard.

FUSE F2 F8A 250V

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.

THERMAL CUT-OUT TC1 145˚C (HVT)

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.

THERMAL CUT-OUT TC2 150˚C (OVEN)

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.

TURNTABLE MOTOR TTM

The turntable motor drives the turntable roller assembly to rotate the turntable.

FAN MOTOR FM

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.

NOISE FILTER

The noise filter assembly prevents radio frequency interference that might flow back in the power circuit.

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.

BOTTOM HEATING ELEMENT GH2

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.

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).

TROUBLESHOOTING GUIDE

FUNCTION OF IMPORTANT COMPONENTS

CONT...

R-671 - 13

TROUBLESHOO TING GUIDE CONT...

CONDITION

PROBLEM

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

ABCDEEEFFGH I J JKK LMNNNNNNO

Fuse F1 15A blows when power cord is plugged into wall outlet.

 Fuse F2 F8A blows when the door is opened.

 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.)

 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.

 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 heating element (top) doesn't operate.

 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 (top) doesn't operate.

 Bottom heating element doesn't operate.

OFF

CONDITION

COOKING

CONDITION

(COMMON MODE)

MICROWAVE

COOKING

CONDITION

GRILL

COOKING

CONDITION

DUAL

COOKING

CONDITION

TEST PROCEDURE

POSSIBLE CAUSE

AND

DEFECTIVE PARTS



R-671 - 14

A MAGNETRON TEST

PROCEDURE

LETTER

COMPONENT TEST

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.

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 heat-

up 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.

NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION.

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

TEST PROCEDURES

R-671 - 15

PROCEDURE

LETTER

TEST PROCEDURES CONT...

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

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.

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.

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.

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.

D HIGH VOLTAGE CAPACITOR TEST

R-671 - 16

PROCEDURE

LETTER

COMPONENT TEST

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

Table: Terminal Connection of Switch

Plunger Operation COM to NO COM to NC

Released Open circuit Short circuit Depressed 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.

CARRY OUT 3D CHECKS. Isolate the switch to be tested and using an ohmmeter check between the terminals as described in the following table.

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

Temperature of "ON" Temperature of "OFF" Indication of ohmmeter

Parts Name condition (closed circuit). condition (open circuit). (When room temperature

(˚C) (˚C) 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: Only replace fuse

15A with the correct value replacement.

H 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.

TEST PROCEDURES CONT...

R-671 - 17

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: Only replace fuse with the correct value replacement.

I NOISE FILTER TEST

CARRY OUT 3D CHECKS. Disconnect the leads from the terminals of noise filter.

Using an ohmmeter, check between the terminals as described in the following table.

MEASURING POINTS INDICATION OF OHMMETER

Between N and L Approx. 680 kΩ Between terminal N and WHITE Short circuit Between terminal L and RED Short circuit

If incorrect readings are absorbed, replace the noise filter unit. CARRY OUT

4R CHECKS.

LINE BYPASS CAPACITOR 4700p/250V

NOISE SUPPRESSION COIL

RESISTOR 680K/0.5W

10M/0.5W

LINE CROSS CAPACITOR

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8A

NOISE  FILTER

WHT RED

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.

TEST PROCEDURES CONT...

R-671 - 18

PROCEDURE

LETTER

COMPONENT 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.

L TOUCH CONTROL PANEL ASSEMBLY TEST

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 CONNECTED COMPONENTS

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

TEST PROCEDURES CONT...

R-671 - 19

PROCEDURE

LETTER

COMPONENT TEST

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 Check supply voltage and oven power cord.

POWER terminal of CPU connector (CN-A).

2 The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective.

side of low voltage transformer. 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.

CARRY OUT 4R CHECKS.

O PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING

BOARD (PWB) IS OPEN

VRS1

CN - A

(J1)

RY5

TEST PROCEDURES CONT...

R-671 - 20

LSI(IZA909DR)

The I/O signal of the LSI(IZA909DR) are detailed in the following table.

Pin No. Signal I/O Description

1-2 VL2-VL1 IN Power source voltage input terminal.

Standard voltage for LCD.

3-5 AN7-AN5 IN Terminal to change functions according to the Model.

DC voltage in accordance with the Model in operation is applied to set up its

function. 6 AN4 OUT Terminal not used. 7 AN3 IN 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. 8 AN2 IN Input signal which communicates the door open/close information to LSI.

Door closed; "H" level signal.

Door opened; "L" level signal. 9-10 P01-P00 OUT Terminal not used. 11 P57 IN Terminal not used.

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 Application

VC -5.0V 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.

CONTROL PANEL ASSEMBLY

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.

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).

OUTLINE OF CONTROL PANEL

DESCRIPTION OF LSI

R-671 - 21

12 P56 OUT 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 P55 OUT Terminal not used. 14 P54 OUT Signal to sound buzzer.

A: key touch sound. B: Completion sound.

15 P53 OUT 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.

16 P52 OUT Fan motor driving signal.

To turn on and off the fan motor relay RY5. "L" level during cooking, or for 5 minutes after grill cooking or dual cooking. "H" level otherwise.

17 P51 OUT Grill heater (TOP HEATER) driving signal.

To turn on and off the grill heater relay (RY3). "L" level during grill (TOP GRILL, TOP AND BOTTOM) cooking or dual (MICRO+TOP) cooking. "H" level otherwise.

18 P50 OUT Bottom heater driving signal.

To turn on and off the bottom relay (RY4). "L" level during grill (BOTTOM HEATER, TOP AND BOTTOM) cooking or dual (MICRO+BOTTOM) cooking. "H" level otherwise.

19 P47 OUT Magnetron high-voltage circuit driving signal.

To turn on and off the cook relay (RY2). In 100% POWER operation, the signals hold "L" level during microwave cooking and "H" level while not cooking. In other cooking modes (70%, 50%, 30%, 10%) the signal turns to "H" level and "L" level in repetition according to the power level.

20-22 P46-P44 OUT Terminal not used. 23 INT1 IN Signal coming from encoder.

When the encoder is turned, the contacts of encoder make pluse signals. And pulse signals are input into INT1.

24 INT0 IN Signal to synchronized LSI with commercial power source frequency

(50Hz).

This is basic timing for time processing of LSI.

25 P41 IN Signal coming from encoder.

Signal similar to INT1. Pulse signals are input into P41.

26 P40 IN Connected to VC.

Pin No. Signal I/O Description

20 msec

During cooking

H: GND

L H: GND

0.12 sec

2.4 sec

OFF

During cooking, or for 5 minutes  after grill cooking, or dual cooking

GND

OFF

During

cooking

GND

(Grill or dual)

OFF

During

cooking

GND

(Grill or dual)

ON/OFF time ratio in Micro cooking (a. 32second time base)

ON/OFF time ratio in Micro cooking (a. 48second time base)

MICRO ON OFF COOK 100% 32sec. 0sec. 70% 24sec. 8sec. 50% 18sec. 14sec. 30% 12sec. 20sec. 10% 6sec. 26sec.

MICRO ON OFF COOK 100% 48sec. 0sec. 70% 36sec. 12sec. 50% 26sec. 22sec. 30% 16sec. 32sec. 10% 8sec. 40sec.

20 msec

H : GND

L (-5V)

DESCRIPTION OF LSI CONT...

R-671 - 22

27 RESET 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. 28-29 P71-P70 OUT Auto indicator (light emitting diode LD5) driving signal. 30 XIN IN Internal clock oscillation frequency input setting.

The internal clock frequency is set by inserting the ceramic filter oscillation circuit

with respect to XIN terminal. 31 XOUT OUT

Internal clock oscillation frequency control output.

Output to control oscillation input of XOUT. 32 VSS IN Power source voltage: -5V.

VC voltage of power source circuit input. 33 P27 OUT 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. 34 P26 OUT 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. 35 P25 OUT 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. 36-40 P24-P20 OUT Terminal not used. 41 P17 IN 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. 42 P16 IN 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. 43 P15 IN 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. 44-48 P14-P10 IN Terminal not used. 49-56 P07-P00 OUT Terminal not used. 57-60 P37-P34 IN 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 AVSS IN Connected to VC.

76 COM3 OUT Terminal not used. 77 COM2 OUT Common data signal: COM3.

Connected to LCD (Pin No. 3). 78 COM1 OUT Common data signal: COM2.

Connected to LCD (Pin No. 2). 79 COM0 OUT Common data signal: COM1.

Connected to LCD (Pin No. 1). 80 VL3 IN Power source voltage input terminal.

Standard voltage for LCD.

Pin No. Signal I/O Description

DESCRIPTION OF LSI CONT...

R-671 - 23

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.

2. Shapes of Electronic Components

Transistor Transistor 2SB1238 DTA123ES

DTA143ES DTD143ES

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 be-

tween the touch control panel and the oven itself is so short that the two can't be separated.

SERVICING

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 be-

tween 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.

approx. 1M ohm

R-671 - 24

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 CAPACI-

TOR BEFORE TOUCHING ANY OVEN COMPONENT OR WIRING.

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. Door does not close firmly.

2. Door hinge, support or latch hook is damaged.

3. The door gasket or seal or damaged.

4. The door is bent or warped.

5. There are defective parts in the door interlock system.

6. 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:

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.

7. Now, the high voltage rectifier and the capacitor should be free.

CAUTION: WHEN REPLACING HIGH VOLTAGE REC-

TIFIER, ENSURE THAT THE CATHODE (EARTH) CONNECTION IS SECURELY FIXED TO THE CAPACITOR HOLDER AND POWER ANGLE WITH AN EARTHING SCREW.

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.

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.

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below

before operating the oven.

WARNING FOR WIRING

R-671 - 25

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.

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.

MAGNETRON REMOVAL

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.

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.

CONTROL PANEL ASSEMBLY REMOVAL

TURNTABLE MOTOR REPLACEMENT

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).

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.

Screw;  LX-CZA030WRE0

Turntable motor cover

Power angle

Tabs

Slits

Figure C-1(b). Turntable motor cover re-install

Figure C-1(a). Turntable motor cover removal

Cutting pliers

Bridges

Turntable motor



cover

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...

R-671 - 26

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.

CAUTION:

• Do not use this removed fan blade again.

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 be-

cause 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.

Shaft

Table

Center of bracket

Coil

Gap

Rotor

Bracket

Stator

Groove joint pliers

Shaft

Axis

Stator

Rotor

These are the position where should be pinched with pliers

Rear view Side view

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.

Figure C-3. Oven lamp

Shaft

Axis

Stator

Rotor

These are the positions that should be pinched with pliers.

Terminal

Push

Pull down

Lever

Positive lock® connector

Figure C-2. Positive lock®connector

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.

CAUTION: WHEN YOU (SERVICE ENGNEERS) CON-

NECT THE POSITIVE LOCK® CONNECTORS TO THE TERMINALS, CONNECT THE POSITIVE LOCK® SO THAT THE LEVER FACES YOU (SERVICE ENGNEERS).

FAN MOTOR REPLACEMENT

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...

R-671 - 27

Removal

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.

Re-install

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 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.

Figure C-4 (a) Replacement of Power Supply Cord Figure C-4(b). Power Supply Cord Replacement

POWER SUPPLY CORD

POWER ANGLE

GREEN / YELLOW WIRE

BLUE WIRE

BROWN WIRE

NOISE FILTER

SCREW

F 8 A

RED

15 A

WHT

CHASSIS



SUPPORT

POWER SUPPLY CORD

MOULDING CORD STOPPER

POWER ANGLE

SQUARE HOLE

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

STOP SWITCH

PRIMARY (MONITORED) LATCH SWITCH

MONITOR SWITCH

Tab

Post

Tab

Post

Figure C-5. Switches

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...

R-671 - 28

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.

After adjustment, make sure of following:

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

PRIMARY LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT

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.)

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.

Figure C-7. Door Disassembly

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 (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 the door frame.

2. Re-install the glass stopper o the door frame as follows.

1) Re-install the glass stopper to the door frame so that the two (2) holes of the glass stopper meet the two (2) pins of the door frame.

2) Hold the glass stopper to the door frame with the two (2) screws.

3. Re-install the latch spring to the latch head. Re-install the latch spring to the door frame. Re-install latch head to door frame.

4. Hold the door panel to the door frame with four (4) screws.

DOOR REPLACEMENT

7. Release two (2) pins of door panel from two (2) holes of upper and lower oven hinges by lifting up.

8. Now, door sub assembly is free from oven cavity.

9. Remove the four (4) screws holding the door panel to the door frame.

10.Now, door panel is free.

11.Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch

Figure C-6 Latch Switches Adjustment

LATCH HOOK

STOP SWITCH

PRIMARY (MONITORED) LATCH SWITCH

MONITOR SWITCH

LATCH HEADS

OPEN LEVER

DOOR OPEN BUTTON

DOOR

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...

CHOKE COVER

DOOR PANEL

PUTTY KNIFE

DOOR FRAME

R-671 - 29

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

LOWER OVEN HINGE

UPPER OVEN HINGE

LOWER OVEN HINGE

CHOKE COVER

DOOR PANEL

DOOR SUB  ASSEMBLY

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT...

R-671 - 30

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.

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.

Recommended instruments are: NARDA 8100 NARDA 8200 HOLADAY HI 1500 SIMPSON 380M

2. Place the oven tray into the oven cavity.

3. 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.

4. 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.

5. Move the probe slowly (not faster that 2.5cm/sec.) along the gap.

6. The microwave radiation emission should be measured at any point of 5cm or more from the external surface of the oven.

mW cm

Microwave leakage measurement at 5 cm distance

SHARP

R-671 - 31

TEST DATA AT A GLANCE

PARTS SYMBOL VALUE / DATA Special fuse F1 15A / 250V Fuse F2 F 8A Thermal cut-out (HVT) TC1 145°C Off / 115˚C On Thermal cut-out (OVEN) TC2 150°C Off / 130˚C On Grill heating element (top) GH1 Approx. 76 Ω / Insulation resistance > 10 MΩ

Bottom heating element GH2 Approx. 132 Ω / Insulation resistance > 10 MΩ Oven lamp OL 230–240 V 25W High voltage capacitor C AC 2100V 1.02µF Magnetron MG Filament < 1Ω / Filament – chassis ∞ ohm.

Power transformer T Filament winding < 1Ω

Secondary winding Approx. 143 Ω / Primary winding Approx. 2.6 Ω

WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.

R-671 - 32

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.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. " . 0 " FLASHES ON DISPLAY.

Figure O-1(c) Oven Schematic-OFF Condition after the oven door is closed.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. DISPLAY DTOPS FLASHING.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. PLUGGED IN OVEN.

3. NOTHING APPEARS ON DISPLAY.

Figure O-1(a) Oven Schematic-OFF Condition right after the oven is plugged in.

Figure O-1(b) Oven Schematic-OFF Condition when the oven door is opened.

CIRCUIT DIAGRAMS

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH1: GRILL HEATING(TOP) ELEMENT

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTROL UNIT

RY6

RY5

COM.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

230V ~ 50Hz

BRN/15BLU/15

G-Y/15



EARTH

LIVENEUTRAL

NC.

RY1 RY4 RY3 RY2

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH1: GRILL HEATING(TOP) ELEMENT

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTRL OUNIT

RY6

RY5

COM.

N.O.

A9.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

230V ~ 50Hz

BRN/15BLU/15

NC.

RY1 RY4 RY3 RY2

G-Y/15



EARTH

LIVENEUTRAL

230V ~ 50Hz

BRN/15BLU/15

G-Y/15



LIVENEUTRAL

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH1: GRILL HEATING(TOP) ELEMENT

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTROL UNIT

RY6

RY5

COM.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

EARTH

NC.

RY1 RY4 RY3 RY2

R-671 - 33

Figure O-3(b) Oven Schematic-Grill cooking Condition (BOTTOM GRILL mode)

Figure O-2 Oven Schematic-Microwave cooking Condition

Figure O-3(a) Oven Schematic-Grill cooking Condition (TOP GRILL mode)

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.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. TOP GRILL COOKING MODE SELECTED.

3. COOKING TIME ENTERED.

4. STRAT BUTTON PRESSED.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. BOTTOM GRILL COOKING MODE SELECTED.

3. COOKING TIME ENTERED.

4. STRAT BUTTON PRESSED.

CIRCUIT DIA GRAMS CONT...

230V ~ 50Hz

BRN/15BLU/15

G-Y/15



LIVENEUTRAL

GH1: GRILL HEATING(TOP) ELEMENT

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTROL UNIT

RY6

RY5

COM.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

EARTH

NC.

RY1 RY4 RY3 RY2

230V ~ 50Hz

BRN/15BLU/15

G-Y/15



EARTH

LIVENEUTRAL

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH1: GRILL HEATING(TOP) ELEMENT

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTROL UNIT

RY6

RY5

COM.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

NC.

RY1 RY4 RY3 RY2

230V ~ 50Hz

BRN/15BLU/15

G-Y/15



EARTH

LIVENEUTRAL

GH1: GRILL HEATING(TOP) ELEMENT

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTROL UNIT

RY6

RY5

COM.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

NC.

RY1 RY4 RY3 RY2

R-671 - 34

Figure O-4(b) Oven Schematic-Dual cooking Condition (Microwave and Bottom Grill mode)

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. TOP AND BOTTOM GRILL COOKING MODE SELECTED.

3. COOKING TIME ENTERED.

4. STRAT BUTTON PRESSED.

Indicates components with potential above 250 V.

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.

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.

CIRCUIT DIA GRAMS CONT...

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTROL UNIT

RY6

RY5

COM.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

NC.

RY1 RY4 RY3 RY2

230V ~ 50Hz

BRN/15BLU/15

G-Y/15



EARTH

LIVENEUTRAL

GH1: GRILL HEATING(TOP) ELEMENT

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH1: GRILL HEATING(TOP) ELEMENT

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTROL UNIT

RY6

RY5

COM.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

NC.

RY1 RY4 RY3 RY2

230V ~ 50Hz

BRN/15BLU/15

G-Y/15



LIVENEUTRAL

EARTH

TTM

OVEN LAMP

FAN MOTOR

TURNTABLE MOTOR

GH2: BOTTOM HEATING ELEMENT

H.V. RECTIFIER

MG:

MAGNETRON

T: HIGH VOLTAGE 

TRANSFORMER

T/C TRANSFORMER

C:

CAPACITOR

1.2µF

AC2100V

CONTROL UNIT

RY6

RY5

COM.

N.O.

SW2: STOP SWITCH

SW1: PRIMARY LATCH SWITCH

TC1:

THERMAL

CUT-OUT

(HVT.)

TC2:

THERMAL

CUT-OUT

(OVEN)

SW3: MONITOR SWITCH

4700p/ 250V4700p/ 250V

10M/ 0.5W

NOISE SUPPRESSION COIL

680 k/ 0.5W

0.22µ/250V

F1: FUSE 15A

F2: FUSE F8ANOISE 

FILTER

NC.

RY1 RY4 RY3 RY2

230V ~ 50Hz

BRN/15BLU/15

G-Y/15



LIVENEUTRAL

EARTH

GH1: GRILL HEATING(TOP) ELEMENT

R-671 - 35

Figure S-1. Pictrorial Diagram

CIRCUIT DIA GRAMS CONT...

BLU

WHT

YLW

WHT

BRN

TC2:

THERMAL 

CUT-OUT(OVEN)

TC1:

THERMAL

CUT-OUT(HVT)

OL: 

OVEN LAMP 



FM:

FAN MOTOR

ORG

RED

YLW

WHT

HIGH VOLTAGE COMPONENTS

H.V.WIRE B

MG: MAGNETRON

H.V.WIRE A

C: 

H.V. 

CAPACITOR

H.V.

RECTIFIER

T: HIGH VOLTAGE

TRANSFORMER

BLU

1 RED

3 GRY

5 WHT

7 BLU

9 YLW

COM

GRY

YLW

WHT

RED

GRY

N.C.

COM

SW2:STOP 

 SWITCH

CONTROL UNIT

COM

GH1: TOP GRILL 

 HEATING ELEMENT

GH2:BOTTOM 

 HEATING 

 ELEMENT

ORG

WHT

RED

WHT

GRN

BRU

RED

ORG

WHT

TTM: TURNTABLE

 MOTOR

SW3:

MONITOR

SWITCH



SW1:PRIMARY

 LATCH 

 SWITCH

GRY

ORG

BLK

RED

BRN

G

R

Y

L

BLK

WHT

CN-A

CN-B

CN-C

RED

GRN

RED

BLU

G/Y

WHT

POWER SUPPLY CORD

NOISE FILTER

LIVE

NEUTRAL

F 8 A

RED

15 A

WHT

BLK

YLW

GRY

BRN

RY5

RY6

RY4

RY1

RY3RY2

COM

R-671 - 36

Figure S-2. Control Panel Circuit

–

A 1

LD1

CN-A

CN-C

WH-B

Back Light

D1-4

11ES1

Q4

2SB1238

Q40

DTA143ES

Q2

DTA143ES

Q20 DTA143ES

Q26 DTA143ES

Q24 DTD143ES

Q22 DTD143ES

Q21 DTA143ES

I-1

IZA909DR

M38223M4

Q25 DTA143ES

D26 11ES1

DOOR

NOTE : IF NOT SPECIFIED

: 1/4w ± 5%

: 1SS270A

: 0.1µ / 16v

CN-B

R9 1k

Q23 DTA143ES

Q3

2SB1238

Q1

DTA123ES

GND

R1 510 1w

AC230V

50Hz

FAN

MOTOR

BOTTOM

HEARTING

ELEMENT

TOP

HEARTING

ELEMENT

HIGH

VOLTAGE

TRANSFORMER

R2 510 1w

R30 15k

R12 4.7k

162 453

SW1SW7

SW8

SW9

SW2

SW3

VR1

10k

AUTO

LD5

Encoder

SW60

R50 4.7k

R51 4.7k

R52 100k

R53 100k

C52

C53

SEG8

VL3

P41

P40

RESET

P71

P70

XIN

XOUT

VSS

P27

P26

P25

P24

P23

P22

P21

P2 0

COM0

COM1

COM2

COM3

AVSS

VREF

VCC

SEG0

SEG1

SEG2

SEG3

SEG4

SEG5

SEG6

SEG7

VL22VL1

AN74AN65AN56AN47AN38AN2

P6110P6011P5712P5613P5514P5415P5316P5217P5118P5019P4720P4621P4522P44

INT124INT0

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

CF1

CST4.00MGW

(J8)

10G471K

C1 0.1µ/50v

C21

10µ

/35v

C20 0.1µ/50v

RY2

RY3

RY1

RY4

RY5

RY6

C3

0.1µ/50v

C2 1000µ/35v

C6 10µ/35v

C7 0.1µ/50v

S12

C1 C2 C3

S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1

VRS1

(J1)

SP1

(J2)

(J4)

(J6)

(J3)

(J5)

(J7)

R40 3.3k

R10 240

ZD1 HZ5C-2

R5 4.7k

R31 4.7k

D30

D22 D23 D21 D24 D25 D20

ZD3

HZ20-1

R4 4.7k

CR60

753

642

10 1

R6 10kR7 10k

R8 10k

R69 15k

R80 1.5k

R70 15k

R68 15k

C30

ZD2

HZ4A2

LD2 LD3 LD4

WH-2

A 3

A 5

A 7

A 9

COM

N.O.

COM

N.O.

COM

N.O.



START

+ 1 min

STOP

WATT

AUTO

DEF

AUTO

COOK

ABC

CIRCUIT DIA GRAMS CONT...

R-671 - 37

Figure S-3. Printed Wiring Board

LD5

R51

DCUT

SW6

SW4

SW9

242322

C51

R50

R53

R52

SW1

SW7

VR1

C50

WH - B

SW8

SW5

( KEY AND JOG UNIT )

LD5

R51

DCUT

SW6

SW4

SW9

242322

C51

R50

R53

R52

SW1

SW7

VR1

C50

WH - B

SW8

SW5

( CPU UNIT )

CIRCUIT DIA GRAMS CONT...

R-671 - 38

CONTROL PANEL PARTS

3- 1 DPWBFB840WRK0 U Control unit 1 BL 3- 1A QCNCMA453DRE0 U 5-pin connector (CN-A) 1 AC 3- 1B QCNCMA414DRE0 U 2-pin connector (CN-B) 1 AB 3- 1C QCNCMA335DRE0 U 11-pin connector (CN-C) 1 AC 3- 1D RLCDSA036DRE0 U Liquid crystal display 1 AK 3- 1E LHLD-A187WRF0 U LCD holder 1 AC 3- 1F PSHEPA569WRE0 U LED sheet 1 AC 3- 1G FW-VZA240DRE0 U 2-pin harness (WH-A) 1 AK 3- 1H FW-VZA241DRE0 U 11-pin harness (WH-B) 1 AN C1 RC-KZA087DRE0 U Capacitor 0.1 uF 50V 1 AB C2 VCEAB31VW108M U Capacitor 1000 uF 35V 1 AB C3 RC-KZA087DRE0 U Capacitor 0.1 uF 50V 1 AB C4-5 VCKYD41CY103N U Capacitor 0.01 uF 16V 2 AA C6 VCEAB31VW106M U Capacitor 10 uF 35V 1 AB C7 RC-KZA087DRE0 U Capacitor 0.1 uF 50V 1 AB C20 VCEAB31HW104M U Capacitor 0.1 uF 50V 1 AA C21 VCEAB31VW106M U Capacitor 10 uF 35V 1 AB C30 VCKYD41CY103N U Capacitor 0.01 uF 16V 1 AA C52-53 VCKYD41CY103N U Capacitor 0.01 uF 16V 2 AA CF1 RCRS-A012DRE0 U Ceramic resonator (CST4.00MGW) 1 AD CR60 RMPTEA011DRE0 U Capacitor array 1 AG D1-4 VHD11ES1///-1 U Diode (11ES1) 4 AB D20-25 VHD1SS270A/-1 U Diode (1SS270A) 6 AA D26 VHD11ES1///-1 U Diode (11ES1) 1 AB D30 VHD1SS270A/-1 U Diode (1SS270A) 1 AA I-1 RH-IZA909DRE0 J LSI 1 AS LD1-4 VHPSLZ781C9-3 U Light emitting diode 4 AC LD5 VHPLTL1CHE/-3 U Light emitting diode 1 AC Q1 VSDTA123ES/-3 U Transistor (DTA123ES) 1 AB Q2 VSDTA143ES/-3 U Transistor (DTA143ES) 1 AB Q3-4 VS2SB1238//-3 U Transistor (2SB1238) 2 AD Q20-21 VSDTA143ES/-3 U Transistor (DTA143ES) 2 AB Q22 VSDTD143ES/-3 U Transistor (DTD143ES) 1 AC Q23-24 VSDTA143ES/-3 U Transistor (DTA143ES) 2 AB Q25 VSDTA143ES/1B U Transistor (DTA143ES) 1 AB Q26 VSDTA143ES/-3 U Transistor (DTA143ES) 1 AB Q40 VSDTA143ES/-3 U Transistor (DTA143ES) 1 AB

Note: The parts marked "∆" may cause undue microwave exposure. / The parts marked "*" are used in voltage more than 250V. / "§" Mark: Spare parts delivery section.

PARTS LIST

∆*

ELECTRIC PARTS

REF. NO. PART NO. § DESCRIPTION Q'TY CODE

C RC-QZA207WRE0 U High voltage capacitor 1 AS F1 QFS-B0019MRE0 U Fuse 15A 1 AC F2 QFS-CA024WRE0 U Fuse F8A 1 AC FM RMOTEA360WRE0 U Fan motor 1 AU GH1 RHET-A206WRE0 U Top heating element 1 AX GH2 RHET-A210WRE0 U Bottom heating element 1 AX MG RV-MZA279WRE0 U Magnetron 1 BD OL RLMPTA066WRE0 U Oven lamp 1 AK SW1 QSW-MA112WRE0 J Primary latch switch 1 AN SW2 QSW-MA110WRE0 J Stop switch 1 AK SW3 QSW-MA112WRE0 J Monitor switch 1 AN T RTRN-A010URE0 U High voltage transformer 1 BG TC1 RTHM-A108WRE0 U Thermal cut-out 145˚C off 115˚C on (HVT) 1 AG TC2 RTHM-A099WRE0 U Thermal cut-out 150˚C off 130˚C on (OVEN) 1 AH TTM RMOTDA227WRE0 U Turntable motor 1 AU 1- 1 RH-DZA048WRE0 U High voltage rectifier 1 AM 1- 2 FPWBFA309WRE1 U Noise filter 1 AT 1- 3 QACCVA004URE1 U Power supply cord 1 AQ

CABINET PARTS

2- 1 GCABUA010URP0 U Outer case cabinet R-671(B) 1 AT 2- 1 GCABUA471WRT0 U Outer case cabinet R-671(W) 1 AW 2- 1 GCABUA026URP0 U Outer case cabinet R-671(IN) 1 AY 2- 2 GLEGPA057WRE0 U Foot 2 AB

R-671 - 39

∆

∆ ∆

∆

CONTROL PANEL PARTS CONT...

REF. NO. PART NO. § DESCRIPTION Q'TY CODE

R1-2 VRS-B13AA511J U Resistor 510 ohm 1W 2 AB R4-5 VRD-B12EF472J U Resistor 4.7k ohm 1/4W 2 AA R6-8 VRD-B12EF103J U Resistor 10k ohm 1/4W 3 AA R9 VRD-B12EF102J U Resistor 1.0k ohm 1/4W 1 AA R10 VRD-B12EF241J U Resistor 240 ohm 1/4W 1 AA R12 VRD-B12EF472J U Resistor 4.7k ohm 1/4W 1 AA R30 VRD-B12EF153J U Resistor 15k ohm 1/4W 1 AA R31 VRD-B12EF472J U Resistor 4.7k ohm 1/4W 1 AA R40 VRD-B12EF332J U Resistor 3.3k ohm 1/4W 1 AA R50-51 VRD-B12EF472J U Resistor 4.7k ohm 1/4W 2 AA R52-53 VRD-B12EF104J U Resistor 100k ohm 1/4W 2 AA R68-70 VRD-B12EF153J U Resistor 15k ohm 1/4W 3 AA R80 VRD-B12EF152J U Resistor 1.5k ohm 1/4W 1 AA RY1 RRLY-A076DRE0 U Relay (OMIF-S-124LM) 1 AK RY2 RRLY-A092DRE0 U Relay (VRB18SP) 1 AP RY3 RRLY-A076DRE0 U Relay (OMIF-S-124LM) 1 AK RY4 RRLY-A115DRE0 U Relay (JV-24S-KT) 1 AK RY5-6 RRLY-A080DRE0 U Relay (OJ-SH-124LM) 2 AG SP1 RALM-A014DRE0 U Buzzer (PKM22EPT-THAI) 1 AG SW4-9 QSW-PA016DRE0 U Tact switch 6 AB T1 RTRNPA105DRE0 U Transformer 1 AR VR1 RVR-BA014DRE0 U Potentiometer 1 AD VRS1 RH-VZA032DRE0 U Varistor (10G471K) 1 AC ZD1 VHEHZ5C2///-1 U Zener diode (HZ5C2) 1 AB ZD2 VHEHZ4A2///-1 U Zener diode (HZ4A2) 1 AB ZD3 VHEHZ201///-1 U Zener diode (HZ20-1) 1 AB 3- 2 HPNLCB010URR0 U Control panel [R-671(B)] 1 AN 3- 2 HPNLCS005URR0 U Control panel [R-671(IN)] 1 AN 3- 2 HPNLCW019URR0 U Control panel [R-671(W)] 1 AN 3- 3 JBTN-B014URF0 U Open button [R-671(B)] 1 AE 3- 3 JBTN-K019URF0 U Open button [R-671(IN)] 1 AE 3- 3 JBTN-W008URF0 U Open button [R-671(W)] 1 AE 3- 4 MSPRCA045WRE0 U Open button spring 1 AA 3- 5 GMADIA015URR0 U Display window 1 AE 3- 6 JBTN-B003URF0 U Start button [R-671(B)] 1 AC 3- 6 JBTN-G001URF0 U Start button [R-671(W)] 1 AC 3- 6 JBTN-K020URF0 U Start button [R-671(IN)] 1 AC 3- 7 JBTN-B004URR0 U Auto/Def button [R-671(B)] 1 AE 3- 7 JBTN-K016URR0 U Auto/Def button [R-671(IN)] 1 AE 3- 7 JBTN-W010URR0 U Auto/Def button [R-671(W)] 1 AE 3- 8 JBTN-B007URF0 U Watt/Stop button [R-671(B)] 1 AC 3- 8 JBTN-K018URF0 U Watt/Stop button [R-671(IN)] 1 AC 3- 8 JBTN-W013URF0 U Watt/Stop button [R-671(W)] 1 AE 3- 9 JBTN-K008URF0 U More/Less button 1 AC 3- 10 JBTN-O004URR0 U Pizza button 1 AD 3- 11 JKNBKB003URF0 U Select knob [R-671(B)] 1 AF 3- 11 JKNBKK004URF0 U Select knob [R-671(IN)] 1 AE 3- 11 JKNBKW003URF0 U Select knob [R-671(W)] 1 AE 3- 12 JKNBKB004URF0 U Timer knob [R-671(B)] 1 AF 3- 12 JKNBKK003URF0 U Timer knob [R-671(IN)] 1 AE 3- 12 JKNBKW004URF0 U Timer knob [R-671(W)] 1 AE 3- 13 MSPR-A002URE0 U Switch spring 1 AB 3- 14 XEPSD30P10XS0 U Screw; 3mm x 10mm 12 AA

OVEN PARTS

4- 1 LBNDKA111WRP0 U H.V. Capacitor holder 1 AD 4- 2 LANGTA004URP0 U Power angle 1 AC 4- 3 DOVN-A012URY0 U Oven cavity 1 BL 4- 4 FANGTA002URY0 U Turntable shaft assembly 1 AM 4- 5 PSPAGA001WRE0 U Vibration proof cushion 1 AA 4- 6 LANGQA010URP0 U Exhaust duct angle 1 AE 4- 7 PDUC-A006URP0 U Exhaust duct 1 AL 4- 8 PHOK-A092WRF4 U Latch hook 1 AH 4- 9 NFANJA029WRE0 U Fan blade 1 AM 4-10 LANGFA169WRP5 U Chassis support 1 AE 4-11 LANGQA006URP0 U Turntable motor angle 1 AD

PARTS LIST CONT...

R-671 - 40

OVEN PARTS CONT...

REF. NO. PART NO. § DESCRIPTION Q'TY CODE

4-12 LANGQA007URP0 U Air duct angle 1 AG 4-13 LANGQA008URP0 U Grill heater angle 1 AD 4-14 MLEVFA078WRF0 U Open lever 1 AE 4-15 MSPRCA004URE0 U Sealed spring 1 AA 4-16 PCOVPA309WRE0 U Waveguide cover 1 AC 4-17 PCOVQA002URP0 U Heater cover 1 AD 4-18 PCUSGA360WRP0 U HVT cushion 1 AA 4-19 PCUSUA020URE0 U Cushion 1 AA 4-20 PDUC-A005URP0 U Air duct 1 AG 4-21 PDUC-A581WRF3 U Air intake duct 1 AE 4-22 PDUC-A638WRF2 U Fan duct 1 AE 4-23 PGSK-A001URE0 U O-ring gasket 1 AB 4-24 PPACGA001URE0 U Heater packing 1 AD 4-25 PSKR-A003URF0 U Rear barrier 1 AE 4-26 PCUSGA003URP0 U Cushion (TTM cover) 2 AC 4-27 PCUSUA021URE0 U Door cushion 1 AC 4-28 PCLI-A001URE0 U Harness clip 1 AA

∆

* *

DOOR PARTS

5- 1 DDORFA001URY0 U Door panel assembly 1 AY 5- 2 GCOVHA016URF0 U Choke cover 1 AK 5- 3 GWAKPB009URR0 U Door frame R-671(B) 1 AY 5- 3 GWAKPW015URR0 U Door frame R-671(W) 1 AY 5- 3 GWAKPS006URR0 U Door frame R-671(IN) 1 AY 5- 4 LSTPPA003URF0 U Glass stopper 1 AB 5- 5 LSTPPA158WRF0 U Latch head 1 AD 5- 6 MSPRTA141WRE0 U Latch spring 1 AA 5- 7 PGLSPA002URE0 U Front door glass 1 AS 5- 8 XEBSD30P06000 U Screw : 3mm x 6mm 6 AA

MISCELLANEOUS

6- 1 TINS-A074URR0 U Operation manual 1 AM 6- 1 TINS-A112URR0 U Operation manual (R-671(W)N) 1 AM 6- 2 CTNT-A001URK0 U Turntable 1 AY 6- 3 FAMI-A081WRM1 U Trivet (Rack) 1 AR 6- 4 QW-QZA001URE0 U High voltage wire B 1 AE 6- 5 QW-QZA191WRE0 U High voltage wire A 1 AF 6- 6 FW-VZA053URE0 U Stop switch harness 1 AF 6- 7 FW-VZA049URE1 U Main harness 1 AT 6- 8 LBNDKA004WRE0 U Wire tie 1 AB 6- 9 LHLDKA008WRF0 U P-clip 1 AA 6-10 TCAUHA006URR0 U Caution label 1 AE 6-11 TINS-A105URR0 U Quick start guide 1 AM

HOW TO ORDER REPLACEMENT PARTS

To have your order filled promptly and correctly, please furnish the following information.

1. MODEL NUMBER 3. PART NO.

2. REF. NO. 4. DESCRIPTION

PARTS LIST CONT...

SCREWS,NUTS AND WASHERS

7- 1 LX-CZA063WRE0 U HVT screw 4 AA 7- 2 LX-LZA011WRE0 U Rivet 1 AB 7- 3 LX-NZ0061WRE0 J Nut 2 AA 7- 4 XFPSD40P06000 J Screw: 4mm x 6mm 3 AA 7- 5 XHPSD40P08K00 U Screw: 4mm x 8mm 1 AA 7- 6 XHTSD40P08RV0 J Screw: 4mm x 8mm 8 AA 7- 7 XOTSD40P10000 U Screw: 4mm x 10mm 9 AA 7- 8 XOTSD40P12RV0 J Screw: 4mm x 12mm 10 AA 7- 9 XOTSF40P12000 J Screw: 4mm x 12mm R-671(B) 2 AA 7- 9 XOTSE40P12000 J Screw: 4mm x 12mm R-671(W) 2 AA 7- 9 XOTSE40P12000 J Screw: 4mm x 12mm R-671(IN) 2 AA 7-10 LX-CZA030WRE0 J TTM cover screw 1 AA 7-11 XBPWW30P05K00 J Screw: 3mm x 5mm 2 AA 7-12 XEPSD30P10XS0 U Screw: 3mm x 10mm 1 AA

R-671 - 41

OVEN PARTS

NOTE: In the event of removing the turntable motor cover, this part should be refitted using screw connection: LX-CZS030WRE0 (Ref. # 7-10)

CABINET AND UNIT CHASSIS PARTS

7-7

2-1

6-10

7-6

7-11

4-7

4-21

4-16

6-2



7-7

7-6

1-1

4-18

4-5

TC1

7-1

7-8

6-8

2-2

6-6

7-7

7-12

4-2

7-7

6-9

7-7

4-19

4-20

1-3

4-8

4-14

4-12

SW2

7-8

7-3

7-8

7-9

GH1

7-8

4-6

7-11

7-7

4-13

4-3

GH2

7-2

TC2

7-9

7-5

7-4

4-10

4-28

7-6

SW3

SW1

7-6

7-7

4-1

7-7

4-25

4-2

7-4

TTM

4-4

4-23

4-11

4-15



4-9

4-22

4-24

4-17

1-2

7-7

4-26

R-671 - 42

DOOR PARTS

CONTROL PANEL PARTS

CONTROL PANEL/DOOR PARTS

4-27

5-7

5-8

5-3

5-4

5-5

5-1

5-2

5-6

3-9

3-7

3-10

3-4

3-3

3-13

3-11

3-12

3-6

3-2

3-5

3-8

3-14

x 6

3-14

x 6

3-1

3-1E

3-1F

3-1D

R-671 - 43

PACKING AND ACCESSORIES

TURNTABLE TRAY

RACK

PRINTED MATTER

ACCESSORY HOLDER (SPADPA010URE0)

TOP PAD ASSEMBLY (FPADBA008URK0)

BOTTOM PAD ASSEMBLY (FPADBA007URK0)

OVEN BAG (SSAKHA041WRE0)

DOOR PROTECTION SHEET (SPADPA531WRE0)

PACKING CASE (SPAKCA228URR0); R-671(B) (SPAKCA229URR0); R-671(W) (SPAKCA230URR0); R-671(IN) (SPAKCA237URR0); R-671(W)N (SPAKCA238URR0); R-671(W)E (SPAKCA239URR0); R-671(B)E (SPAKCA240URR0); R-671(IN)E     

Not Replaceable Items.

OUTER WRAP COVER [R-671(B)] (SPADFA353WRE0)

INTO THE OVEN CAVITY

6-5

6-3

6-6

6-4

Actual wire harness may be different from illustration.

6-7

MISCELLANEOUS

MISCELLANEOUS/PACKING AND ACCESSORIES

R-671 - 44



'98 SHARP CORP. (7S1.31E) Printed in U.K.

Sharp R-671(B), R-671(IN), R-671(W), R-671(W)E, R-671(IN)E Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual