Sharp R-216(G), R-216(IN), R-216(W), R-216(Y) Service Manual

R-216(G) R-216(IN) R-216(W) R-216(Y)

TABLE OF CONTENTS

Page

CAUTION, MICROWAVE RADIATION.................................................................................................... 1

WARNING.................................................................................................................................................1

SERVICING ............................................................................................................................................. 2

PRODUCT SPECIFICATIONS .................................................................................................................5

GENERAL INFORMATION.......................................................................................................................5

APPEARANCE VIEW .............................................................................................................................. 6

OPERATION SEQUENCE........................................................................................................................7

FUNCTION OF IMPORTANT COMPONENTS ....................................................................................... 8

TROUBLESHOOTING GUIDE .................................................................................................................9

TEST PROCEDURE.............................................................................................................................. 10

CONTROL PANEL ASSEMBLY ............................................................................................................15

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE.................................................. 18

MICROWAVE MEASUREMENT ........................................................................................................... 24

TEST DATA AT A GLANCE .................................................................................................................. 25

WIRING DIAGRAM................................................................................................................................ 25

PICTORIAL DIAGRAM .......................................................................................................................... 26

CONTROL PANEL CIRCUIT ..................................................................................................................27

PRINTED WIRING BOARD ....................................................................................................................28

PARTS LIST .......................................................................................................................................... 29

S5207R216PHW/

MICROWAVE OVEN

MODELS

R-216(G) R-216(IN) R-216(W) R-216(Y)

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

SERVICE MANUAL

SHARP CORPORATION

[]

R-216(G) R-216(IN) R-216(W) R-216(Y)

CAUTION

MICROWAVE RADIATION

Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating devices if it is improperly used or connected. All input and output microwave connections, waveguides, flanges and gaskets must be secured. Never operate the device without a microwave energy absorbing load attached. Never look into an open waveguide or antenna while the device is energized.

VARNING

MICKROVAGSSTRALING

Personal får inte utsättas för mikrovågsenergi som kan ustrala från magnetronen eller andre mikrovågsalstrande anordningar om dessa är felanslutna eller används på fel sätt. Alla in-och utgångsanslutningar för mikrovågor, vagledare, flänsar och packningar måste vara fast anslutna. Mikrovågsgeneratorn får inte arbeta utan att absorberande belastning är ansluten. Titta aldrig in i ën öppen vågledare eller antenn när mikrovågsgeneratorn är påkopplad eller laddad.

VAROITUS

MIKROAALTOSÄTELYÄ

Käyttäjä ei saa joutua alttiiksi mikroaaltoenergialle, jota voi säteillä magnetronista tai muusta mikroaaltoja kehittävästä laitteesta, jos sitä käytetään tai jos se kytketään väärin. Kaikkien mikroaaltoliitäntöjen sekä syöttö-että ulostulopuolella, aaltoputkien laippojen ja tiivisteiden tulee olla varmistettuja. Mikroaaltouunnia ei koskaan saa käyttää ilman kuormaa jossa mikroaaltoenergiaa kuluu. Avoimeen aaltoputkeen tai antenniin ei koskaan saa katsoa virran ollessa kytkettynä.

ADVARSEL

MIKROBØLGESTRÅLING

Personell må ikke utsettes for mikrobølge-energi som kan utståles fra magnetronen eller andre mikrobølge-generende deler dersom apparatet feilbetjenes eller blir feiltikoplet. Alle inn-og ut-tilkoplinger i forbindelse med mikrobølge-strålingen, bølgeledere, flenser og tetningsringer/pakninger må festes ordentlig. Aldri bruk apparatet med mindre en mikrobålge-absorberende last er plassert i ovnsrommet. Aldri se direkte inn i en åpen bølgeleder eller antenne imens apparatet er strømførende.

ADVARSEL

MIKROBØLGEBESTRÄLING

Man bør ikke udsætte sig for mikrobølgebestråling fra magnetronen eller andre mikrobølgefrembringende anordninger, hvilket kan ske hvis apparatet er forkert tilsluttet eller bruges forkert. Alle mikrobølgeindgange og-udgange, bølgeledere, flanger og tætningsstrimler må være forsvarligt udført. Anvend aldrig ovnen uden en mikrobølgesabsorberende anordning. Se aldrig ind i en åben bølgeleder eller antenne, mens ovnen er i brug.

R-216(G) R-216(IN) R-216(W) R-216(Y)

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.

SHARP CORPORATION

OSAKA, JAPAN

SERVICE MANUAL

MICROWAVE OVEN

R-216(G)/ R-216(IN)/ R-216(W)/ R-216(Y)

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 at 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.

SERVICING

PRODUCT SPECIFICATIONS

GENERAL INFORMATION

APPEARANCE VIEW

OPERATING SEQUENCE

FUNCTION OF IMPORTANT COMPONENTS

TROUBLESHOOTING GUIDE AND TEST PROCEDURE

TOUCH CONTROL PANEL

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

MICROWAVE MEASUREMENT

TEST DATA AT A GLANCE

WIRING DIAGRAM

PARTS LIST

R-216(G) R-216(IN) R-216(W) R-216(Y)

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 component being tested.

When all service work is completed, and the oven is fully assembled, the microwave power output should be checked and a microwave leakage test should be 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-216(G) R-216(IN) R-216(W) R-216(Y)

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 ALTO VOLTAJE

El condensador de alto voltaje permanece cargado unos 60 segundos después de haber apagado el horno. Espere 60 segundos y luego ponga en cortocircuito la conexión del condensador de alto voltaje (esto es, del conductor de conexión del rectificador de alto voltaje) al chasis con un destornillador de mango aislado.

Se recomienda encarecidamente que siempre que sea posible la localización de fallos se realice con la alimentación desconectada. Puede ser que en algunos casos sea necesario conectar la alimentación después de haber retirado la carcasa exterior. En este caso, realice las comprobaciones 3D y luego desconecte los conductores del primario del transformador de alimentación. Asegúrese de que estos conductores permanezcan aislados de otros componentes y del chasis del horno. (Use cinta aislante si es necesario). Cuando termine la prueba efectúe las comprobaciones 3D y reconecte los conductores al primario del transformador de alimentación.

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.

R-216(G) R-216(IN) R-216(W) R-216(Y)

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 IMPORTANTI 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 . P er verificare la presenza di energia da microonde all'inter no di una cavitá, mettere una tazza di acqua fredda sul piatto rotante del forno , chiudere la porta, regolare la potenza su HIGH ed impostate il temporizzatore su due (2) minuti. Trascorsi i due minuti (temporizzatore a zero), controllare accuratamente che ora l'acqua sia calda. Se l'acqua è rimasta fredda, eseguire i tre controlli iniziali e verificare nuovamente i collegamenti del componente in questione.

Dopo aver portato a termine le operazioni di manutenzione e rimontato il forno, è necessario controllare la potenza delle microonde emesse ed eseguire un test per verificare che non vi sia alcuna dispersione.

R-216(G) R-216(IN) R-216(W) R-216(Y)

PRODUCT DESCRIPTION

SPECIFICATION

ITEM DESCRIPTION

Power Requirements 230 Volts

50 Hertz Single phase, 3 wire earthed

Power Consumption 1.18 kW Power Output

800 W nominal of RF microwave energy (measured by method of IEC 60705) Operating fequency 2450 MHz

Case Dimensions Width 460 mm

Height 290 mm including foot Depth 372 mm

Cooking Cavity Dimensions Width 314mm

Height 202 mm

Depth 312 mm Turntable diameter 295 mm Control Complement Light up dial timer (30 minutes)

Microwave Power for Variable Cooking

Repetition Rate;

800W .....................................Full power throughout the cooking time

560W ....................................................... approx. 70% of Full Power

400W ....................................................... approx. 50% of Full Power

240W ....................................................... approx. 30% of Full Power

80W ......................................................... approx. 10% of Full Power

Set Weight Approx. 14 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

R-216(G) R-216(IN) R-216(W) R-216(Y)

APPEARANCE VIEW

OVEN

CONTROL PANEL

7. Coupling

8. Control panel

9. Waveguide cover

10.Power supply cord

11.Turntable

12.Roller stay

1. Ventilation openings

2. Oven lamp

3. Door hinges

4. Door safety latches

5. See through door

6. Door seals sealing surfaces

NOTE: The oven is fitted with a safety feature. If the TIMER remains at the "0" position for more than 3 minutes,

the oven door must be opened or the MICROWAVE POWER LEVEL button must be pressed before the dial can be operated again.

WATT indicator

MICROWAVE POWER LEVEL button

TIMER Knob

Light display (0 - 30 Min.)

R-216(G) R-216(IN) R-216(W) R-216(Y)

OPERATION SEQUENCE

OFF CONDITION

Closing the door activates all door interlock switches (monitored latch switch and 2nd. interlock relay control switch).

IMPORTANT When the timer knob is at "0" the oven in the OFF condition. When the oven door is closed, the monitor switch contacts (COM-NC) must be open. When the microwave oven is plugged in a wall outlet (230V 50Hz), the noise filter and the control panel are energized.

Figure O-1 on page 25

MICROWAVE COOKING CONDITION

HIGH COOKING

When the door is closed, the contacts (COM-NO) of the monitored latch switch SW1 and the monitor switch SW2 are closed. When the microwave power is set to 800W position by pressing the microwave power level button and cooking time is selected by turning the timer knob, the following components are energized: H.V. transformer, Magnetron, Oven lamp, Turntable motor and Fan motor.

Function sequence

Figure O-2 on page 25

CONNECTED COMPONENTS RELAY Oven lamp, Fan motor, Turntable motor RY1 High voltage transformer RY2

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 wave length 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 open. The circuits to the oven lamp, high voltage transformer, fan motor and turntable motor are cut off.

5. When the door is opened during a cook cycle, the switches come to the following condition.

CONDITION DURING DOOR OPEN

SWITCH CONTACT COOKING

(NO COOKING)

Monitored latch switch

COM-NO Closed Open Monitor switch COM-NC Open Closed 2nd. interlock relay

control switch

COM-NO Closed Open

The circuits to the high voltage transformer, fan motor turntable motor, and the oven lamp are cut off when the

monitored latch switch SW1 and 2nd. interlock relay control switch (SW3) are made open.

6. MONITOR SWITCH CIRCUIT The monitor switch SW2 is mechanically controlled by oven door, and monitors the operation of the monitored latch switch SW1.

6-1 When the oven door is opened during or after the

cycle of a cooking program, the monitored latch switch SW1 and 2nd. interlock relay control switch SW3 must open their contacts first. After that the contacts (COM-NC) of the monitor switch SW2 can be closed.

6-2. When the oven door is closed, the contacts (COM-

NC) of the monitor switch SW2 must be opened first. After that the contacts (COM-NO) of the monitored latch SW1 and 2nd. interlock relay control switch SW3 are closed.

6-3. When the oven door is opened and the contacts

(COM-NO) of the monitored latch switch SW1 remain closed, the fuse F1 will blow, because the contacts (COM-NC) of the monitor switch are closed and a short circuit is caused.

560W, 400W, 240W, 80W 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-seconds time base through the relay contact which is coupled with the current-limiting relay RY2. The following levels of microwave power are given.

SETTING;

NOTE: The ON/OFF time ratio does not exactly corre-

spond to the percentage of microwave power, because approx. 3 seconds are needed for heating up the magnetron filament.

POWER OUTPUT REDUCTION

After 100% power cooking mode is carried out for more than 20 minutes, the power output is automatically reduced to 70%. Even if the cooking time is shorter than for 20 minutes, the power output is reduced to 70% after total cooking time over 20 minutes when the oven is started in 100% power cooking mode again within 1 minute and 35 seconds.

32 sec. ON

Approx. 70%

100%

800W

560W

400W

240W

80W

24 sec. ON 8 sec. OFF

14 sec. OFF

10 sec. OFF

26 sec. OFF

Approx. 50%

18 sec. ON

Approx. 30%

12 sec. ON

Approx. 10%

6 sec. ON

R-216(G) R-216(IN) R-216(W) R-216(Y)

FUNCTION OF IMPORTANT COMPONENTS

THERMAL CUT-OUT TC2 125˚C (OVEN)

The thermal cut-out located on the top of the oven cavity is designed to prevent damage to the oven if the foods in the oven catch fire due to over heating produced by improper setting of cook time or failure of control unit. Under normal operation, the thermal cut-out remains closed. However, when abnormally high temperatures are reached within the oven cavity, the thermal cut-out will open at 125˚C, causing the oven to shut down. The defective thermal cut-out must be replaced with a new one.

THERMAL CUT-OUT TC1 95˚C (MAGNETRON )

The thermal cut-out located on the top of the oven cavity is designed to prevent damage to the magnetron if an over heated condition develops in the tube due to cooling fan failure, obstructed air guide, dirty or blocked air intake, etc. Under normal operation, the thermal cut-out remains closed. However, when abnormally high temperatures are reached within the magnetron, the thermal cut-out will open at 95˚C, causing the oven to shut down. When the magnetron has cooled to 75˚C, the thermal cut-out closes and cook cycle will resume.

TURNTABLE MOTOR TTM

The turntable motor drives the roller stay 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 the heating foods. It is then exhausted through the exhausting air vents at the oven cavity.

NOISE FILTER

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

DOOR OPEN MECHANISM

The door is opened by pulling the door, refer to the Figure D-1.

Figure D-1. Door Open Mechanism

MONITORED LATCH SWITCH

SW1 AD 2ND. IN-

TERLOCK RELAY CONTROL SWITCH

SW3

1. When the oven door is closed, the contacts (COM-NO) must be closed.

2. When the oven door is opened, the contacts ( COMNO) must be opened.

MONITOR SWITCH SW2

1. When the oven door is closed, the contacts (COM-NC) must be opened.

2. When the oven door is opened, the contacts ( COMNC) must be closed.

3. If the oven door is opened and the contacts (COM-NO) of the monitored latch switch SW1 and 2nd. interlock relay RY2 fail to open, the fuse F1 blows simultaneously with closing the contacts (COM-NC) of the monitor switch SW2.

CAUTION: BEFORE REPLACING A FUSE F1 TEST

THE MONITORED LATCH SWITCH SW1, 2ND. INTERLOCK RELAY RY2, 2ND. INTERLOCK RELAY CONTROL SWITCH SW3, AND MONITOR SWITCH SW2 FOR PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE".)

FUSE F1

1. The fuse F1 blows when the contacts (COM-NO) of the monitored latch switch SW1 and 2nd. interlock relay RY2 remain closed with the oven door open and when the monitor switch SW2 closes.

2. If the wire harness or electrical components are shortcircuited, the fuse F1 blows to prevent an electric shock of fire hazard.

HIGH VOLTAGE FUSE F2

The high voltage fuse F2 blows when the high voltage rectifier or the magnetron is shorted.

Latch Heads

Latch Hook

Door

SW2: Monitor Switch

Monitored Latch Switch

SW3: 2nd. Interlock Relay Control Switch

SW1:

R-216(G) R-216(IN) R-216(W) R-216(Y)

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 F1 in the monitored latch switch SW1 - 2nd. interlock relay RY2 monitor switch SW2 circuit, check the monitored latch switch SW1, 2nd. interlock relay RY2, 2nd. interlock relay control switch SW3 and monitor switch SW2 before replacing the fuse F1.

TROUBLESHOOTING GUIDE

MAGNETRON

HIGH VOLTAGE TRANSFORMER

H.V. RECTIFIER ASSEMBLY

HIGH VOLTAGE WIRE

HIGH VOLTAGE CAPACITOR

MONITORED LATCH SWITCH

SW1

2ND. INTERLOCK RELAY CONTROL SWITCH

SW3

MONITOR SWITCH

SW2

THERMAL CUT-OUT 125˚C (OVEN)

TC2

THERMAL CUT-OUT 95˚C (MG)

TC1

FAN MOTOR

TURNTABLE MOTOR

FUSE T6.3A

CONTROL PANEL

TACT SWITCH

RELAY

RY1,

RELAY

RY2,

FOIL PATERN ON P.W.B.

POWER SUPPLY CORD

SHORTED WIRE HARNESS

OPENED WIRE HARNESS

OVEN LAMP

WALL OUTLET

MISADJUSTMENT SWITCH

HOME FUSE OR BREAKER

BLOCKED COOLING FAN

BLOCKED VENTILATION

NOISE FILTER

H.V. FUSE

Home fuse blows when power supply cord is plugged into wall outlet.

FUSE

F1 blows when power supply cord is plugged into wall outlet.

Oven does not start when the timer is set.

Oven lamp does not light (Other function is normal.)

Fan motor does not operate. (Other function is normal.)

Turntable motor does not operate. (Other function is normal.)

Oven or any electrical parts does not stop when cooking time is 0.

Oven seems to be operating but little or no heat is produced in oven load. (Microwave power level is set at 800W)

Oven does not seems to be operating properly when 560W, 400W,240W or 80W is set. (Oven operates properly at 800W.)

Oven goes into cook cycle but shuts down before end of cooking cycle.

Oven lamp, turntable motor and fan motor do not operate.

The microwave power level can not be changed.

OFF CONDITION

PROBLEM

CONDITION

POSSIBLE CAUSE

AND

DEFECTIVE PARTS

TEST PROCEDURE

ON CONDITION

CK = Check / RE = Replace

ABC

CK D

E EEF F G G H K L M M N RECKCKRE CKCKCKCKCK IJ

R-216(G) R-216(IN) R-216(W) R-216(Y)

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

A MAGNETRON TEST

CARRY OUT 3D CHECKS. Isolate the magnetron from the high voltage circuit by removing all leads connected to the 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 a short circuit 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 (IEC60705)

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 IEC 60705, i.e. it can be measured by using water load how much it can be absorbed by the water load. To measure the microwave output power in the microwave oven, the relation of calorie and watt is used. When P(W) heating works for t(second), approximately P x t/4.187 calorie is generated. On the other hand, if the temperature of the water with V(ml) rises ∆T (˚C) during this microwave heating period, the calorie of the water is V x ∆T.

The formula is as follows;

P x t / 4.187 = V x ∆ T+ 0.55 x mc (T2-T0)/4.187P (W) = 4.187 x V x ∆T / t + 0.55 x mc (T2-T0)/t Our condition for water load is as follows:

Room temperature (T0) ... around 20°C Power supply Voltage.............. Rated voltage

Water load..................................1000 g Initial temperature (T1) ...................... 10±1°C

Heating time.............................. 52 sec. Mass of container (mc)......................... 330 g

T2............................ Final Temperature P = 80 x ∆T + 0.55 x mc (T2-T0)/52

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 of the test.

3. Temperature of the water The initial temperature of the water is (10±1)˚C.

4. Select the initial and final water temperature so that the maximum difference between the final water temperature and the ambient temperature is 5˚C.

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 an accurate thermometer.

7. The water load must be (1000±5) g.

8. “t” is measured while the microwave generator is operating at full power. Magnetron filament heatup time is not included.

NOTE: The operation time of the microwave oven is “t + 3” sec. 3 sec. is magnetron filament heat-up

time.

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 ˚C.

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.

R-216(G) R-216(IN) R-216(W) R-216(Y)

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

Room temperature ....................... To = 21˚C Initial temperature .................... T1 = 11°C

Temperature after (52 + 3) = 55 sec. ..................................................................... T2 = 21°C

Temperature difference Cold-Warm ................................................................... ∆T1 = 10°C

Measured output power

The equation is “P = 80 x ∆T” ...................................................... P = 80 x 10°C = 800 Watts

JUDGEMENT: 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.

Heat up for 55 sec.

B HIGH VOLTAGE TRANSFORMER TEST

WARNING: High voltage and large currents are present at the secondary winding and

filament winding of the high voltage transformer. It is very dangerous to work near this part when the oven is on. NEVER make any voltage measurements of the high-voltage circuits, including the magnetron filament.

CARRY OUT 3D CHECKS. Disconnect the leads to the primary winding of the high voltage transformer. Disconnect the filament and secondary winding connections from the rest of the HV circuitry. Using an ohmmeter, set on a low range, it is possible to check the continuity of all three winding. The following readings should be obtained:-

a. Primary winding.......................... 2.4 ohms approximately

b. Secondary winding .................... 185 ohms approximately

c. Filament winding..................................... less than 1 ohm

If the readings obtained are not stated as above, then the high voltage transformer is probably faulty and should be replaced. CARRY OUT 4R CHECKS.

C HIGH VOLTAGE RECTIFIER TEST

CARRY OUT 3D CHECKS. Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be tested using an ohmmeter set to its highest range. Connect the ohmmeter across the terminal 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. 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.

D HIGH VOLTAGE CAPACITOR TEST

1000g

T1˚C

T2˚C

R-216(G) R-216(IN) R-216(W) R-216(Y)

F THERMAL CUT-OUT TEST

CCARRY 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. CARRY OUT 4R CHECKS.

Table: Thermal Cut-out Test

Temperature of "ON" Temperature of "OFF" Indication of ohmmeter (When room

Parts Name condition (closed circuit). condition (open circuit). temperature is approx. 20˚C.) Thermal cut-out 95˚C TC1(MG.) Below 75˚C Above 95˚C Closed circuit. Thermal cut-out 125˚C TC2 (OVEN)

This is not resetable type. Above 125˚C Closed circuit

If incorrect readings are obtained, replace the thermal cut-out. An open circuit thermal cut-out TC1 (MG) indicates that the magnetron has overheated, this may be

due to resistricted ventilation, cooling fan failure or a fault condition within the magnetron or HV circuit. An open circuit tthermal cut-out TC2 (OVEN) indicates that the food in the oven cavity may catch fire,

this may be due to overheating produced by improper setting of the cooking time or failure of the control panel.

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

C. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10MΩ

after it has been charged. 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, the 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.

G 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 400 Ω Turntable motor Approximately 12 kΩ

If incorrect readings are obtained, replace the motor. CARRY OUT 4R CHECKS.

R-216(G) R-216(IN) R-216(W) R-216(Y)

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

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 Open circuit Between terminal N and WHITE Short circuit Between terminal L and RED Short circuit

If incorrect readings are obtained, replace the noise filter unit. CARRY OUT 4R CHECKS.

CARRY OUT 3D CHECKS. If the high voltage fuse F2 is blown, there could be a short in the high voltage rectifier or the magnetron. Check them and replace the defective parts and the high voltage fuse.

CARRY OUT 4R CHECKS. CAUTION: ONLY REPLACE HIGH VOLTAGE FUSE WITH THE CORRECT VALUE REPLACE-

MENT.

J HIGH VOLTAGE FUSE F2 TEST

K CONTROL PANEL ASSEMBLY TEST

The 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, troubleshooting by replacement is described according to the symptoms indicated.

1. Control Panel The following symptoms indicate a defective control unit.

1-1 In connection with LEDs

a) At a certain LED, all or some LEDs do not light up. b) At a certain LED, brightness is low. c) Only one LED does not light up. d) All or some LEDs continue to light up. e) A certain group of LEDs do not light up. f) The LEDs flicker.

1-2 Tact switch

a) When touching a tact switch, a tact switch produces no signal.

1-3 Other possible troubles caused by defective control unit.

a) Buzzer does not sound or continues to sound. b) Cooking is not possible. c) Cooking time can not be set. d) Power level can not be set.

H FUSE F1

CARRY OUT 3D CHECKS.

If the fuse F1 is blown when the door is opened, check the monitored latch switch SW1, 2nd. interkock relay RY2, 2nd. interkock relay control switch SW3 and monitor switch SW2. If the fuse F1 is blown by incorrect door switching, replace the defective switch(s) and the fuse F1. If the fuse F1 is blown, there is 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 with the correct value replacement.

FUSE T6.3A

F1:

LINE CROSS CAPACITOR

0.068µ/AC250V

NOISE SUPPRESSION COIL

LINE BYPASS CAPACITOR

0.0022µ/AC250V

LINE BYPASS CAPACITOR

0.0022µ/AC250V

NOISE FILTER

WHT RED

R-216(G) R-216(IN) R-216(W) R-216(Y)

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

M RELAY TEST

L TACT SWITCH TEST

1. CARRY OUT 3D CHECKS.

2. Remove the control unit from the control panel.

3. By using an ohmmeter, check the tact switch operation.

4. 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.

5. CARRY OUT 4R CHECKS after test.

CARRY OUT 3D CHECKS. Remove the outer case and check voltage between Pin Nos. 3 and 5 of the 3 pin connector (A) on the

control unit with an A.C. voltmeter. The meter should indicate 230-240 volts, if not check oven circuit.

Relay Test Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.

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. -11.4V D.C. Oven lamp / Turntable motor / Fan motor RY2 Approx. -11.0V D.C. High voltage transformer

CARRY OUT 4R CHECKS.

To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit 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 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.

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

BOARD(PWB) IS OPEN

(J1)

CN - A

VRS1

RY1

R-216(G) R-216(IN) R-216(W) R-216(Y)

Control Unit

Control unit consists of LSI, power source circuit, synchronizing signal circuit, reset circuit, buzzer circuit, encoder circuit and indicator circuit.

1) LSI

This LSI controls the encoder signal, tact switch strobe signal, relay driving signal for oven function, buzzer signal and LED signal.

2) Power Source Circuit

This circuit generates voltage necessary in the control unit.

Symbol Voltage Application

VC -5.0V LSI(IC-1)

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.

4) Reset Circuit

A circuit to generate a signals which resets the LSI to the initial state when power is supplied.

CONTROL PANEL ASSEMBLY

OUTLINE OF CONTROL PANEL

5) Buzzer Circuit

The buzzer is responsive to signals from the LSI to emit audible sounds (tact switch touch sound and completion sound).

6) 2nd. Interlock Relay Control 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 and light the oven lamp.

8) Encoder

The encoder generates the pulse signal, and the pulse signal is sent to the LSI.

9) Indicator Circuit

Indicator elements are the Light-emitting diodes (LD1LD24 and LD30-LD34). This circuit consists of 4-digits and 8 segments.

10) Tact Switch

Signal generated in the LSI is sent to the tact switch. 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.

DESCRIPTION OF LSI

LSI

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

Pin No. Signal I/O Description

1D3OUT Segment data signal.

Signal is input to the cathodes of the light-emitting diodes (LD8, LD16 and LD24).

2D4OUT Signal to sound buzzer.

A: Tact switch touch sound. B: Completion sound.

3D5OUT Oven lamp, turntable motor and fan 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 and relay(RY2) control circuit.

4D6OUT 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.

H: GND

L: -5V

0.1 sec

2.0 sec

20 msec

During cooking

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

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

R-216(G) R-216(IN) R-216(W) R-216(Y)

Pin No. Signal I/O Description

5D7IN/OUT Terminal not used. 6 P20 IN Connected to 0V. 7 P21 IN Signal coming from touch tact switch.

When tact switch SW2 is touched, a signal will be input into P21. When tact switch is not touched, the signal is held at “H” level.

8 P22 IN Signal coming from encoder.

When the encoder is turned, the contacts of encoder make pulse signals. And pulse signals are input into P22.

9 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.

10 CNVSS IN Reference voltage input terminal.

A reference voltage is applied to the A/D converter in the LSI. Connected to VC.

11 XOUT OUT Internal clock oscillation frequency control output.

Output to control oscillation input of XIN.

12 XIN IN Internal clock oscillation frequency input setting.

The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XOUT terminal.

13 VSS IN Power source voltage: -5V.

The power source voltage to drive the LSI is input to VSS terminal. Connected to VC.

14 VDD IN Power source voltage: 0V.

The power source voltage to drive the LSI is input to VDD terminal. 15 N.F IN Connected to VSS terminal. 16 INT0 IN Signal coming from encoder.

Signal similar to INT0. Pulse signals are input into INT0. 17 INT1 IN Signal to synchronize LSI with commercial power source frequency.

This is basic timing for all real time

processing of LSI.

18-19 AIN0-AIN1 IN Terminal to change functions according to the model.

Signal in accordance with the model in operation is applied to set up its function. 20 AIN2 IN Input signal which communicates the door open/close information to LSI.

Door closed; “H” level signal.

Door opened; “L” level signal. 21 AIN3 IN Terminal to change functions according to the model.

Signal in accordance with the model in operation is applied to set up its function. 22 P00 OUT Digit selection signal.

Signal is input to the anodes of the light-emitting diodes (LD30 - LD34). 23 P01 OUT Digit selection signal.

Signal is input to the anodes of the light-emitting diodes (LD9 - LD16). 24 P02 OUT Digit selection signal.

Signal is input to the anodes of the light-emitting diodes (LD17 - LD24). 25 P03 OUT Digit selection signal.

Signal is input to the anodes of the light-emitting diodes (LD1 - LD8). 26 P10 OUT Segment data signal.

Signal is input to the cathodes of the light-emitting diodes (LD1, LD9, LD17 and LD30). 27 P11 OUT Segment data signal.

Signal is input to the cathodes of the light-emitting diodes (LD2, LD10, LD18 and LD31). 28 P12 OUT Segment data signal.

Signal is input to the cathodes of the light-emitting diodes (LD3, LD11, LD19 and LD32). 29 P13 OUT Segment data signal.

Signal is input to the cathodes of the light-emitting diodes (LD4, LD12 and LD20). 30 D0 OUT Segment data signal.

Signal is input to the cathodes of the light-emitting diodes (LD5, LD13, LD21 and LD33). 31 D1 OUT Segment data signal.

Signal is input to the cathodes of the light-emitting diodes (LD6, LD14, LD22 and LD34). 32 D2 OUT Segment data signal.

Signal is input to the cathodes of the light-emitting diodes (LD7, LD15 and LD23).

20 msec

H : GND

L (-5V)

R-216(G) R-216(IN) R-216(W) R-216(Y)

SERVICING

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.

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

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.

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.

approx. 1M ohm

Transistor 2SB1238

Transistor KRA101M KRA105M KRA222M KRC243M

R-216(G) R-216(IN) R-216(W) R-216(Y)

3) Discharge high voltage capacitor.

REMEMBER TO CHECK 3D

1) Disconnect the supply.

2) Door opened, and wedged open.

To remove the outer case proceed as follows.

1. Disconnect the oven from power supply.

2. Open the oven door and wedge it open.

3. Remove the eight (8) screws from rear and along the side edge of case.

4. Slide the entire case back about 3cm to free it from retaining clips on the cavity face plate.

5. Lift the entire case from the oven.

OUTER CASE REMOVAL

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.

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

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

below before operating the oven.

1. Disconnect oven from power supply.

2. 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 is 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.

WARNING FOR WIRING

To prevent an electric shock, take the following manners.

1. Before wiring,

1) Disconnect the power supply.

2) Open the door and wedge the door open.

3) Discharge the high voltage capacitor and wait for 60 seconds.

2. Don't let the wire leads touch to the following parts;

1) High voltage parts: Magnetron, High voltage transformer, High voltage capacitor, High voltage fuse and High voltage rectifier assembly.

2) Hot parts: Oven lamp, Magnetron, High voltage transformer and Oven cavity.

3) Sharp edge: Bottom plate, Oven cavity, Waveguide flange, Chassis support and other metallic plate.

4) Movable parts (to prevent a fault) Fan blade, Fan motor, Switch.

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.

Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any of the following removal procedures:

HIGH VOLTAGE TRANSFORMER REMOVAL

1. CARRY OUT 3D CHECKS.

2. Remove the one wire tight holding the filament leads of the high voltage transformer to the chassis support.

3. Disconnect the wire leads (main wire harness and H.V. fuse) from high voltage transformer.

4. Disconnect the filament lead of high voltage transformer from the magnetron.

5. Disconnect the filament lead of the high voltage transformer from high voltage capacitor.

R-216(G) R-216(IN) R-216(W) R-216(Y)

HIGH VOLTAGE COMPONENTS REMOVAL

(HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE RECTIFIER ASSEMBLY AND H.V. FUSE)

To remove the components, proceed as follows.

1. CARRY OUT 3D CHECKS.

2. Disconnect the H.V. fuse from the high voltage transformer.

3. Disconnect the H.V. wire of the H.V. rectifier assembly from the magnetron.

4. Remove one (1) screw holding capacitor holder to the oven cavity back plate.

5. Disconnect the filament lead of the high voltage transformer from the H.V. capacitor.

Remove one (1) screw holding earth side terminal of high voltage rectifier assembly, and remove capacitor holder.

7. Disconnect all the leads and terminals of high voltage rectifier assembly from high voltage capacitor.

Disconnect the H.V. fuse from the high voltage capacitor.

9. Now H.V. rectifier assembly, H.V. fuse and H.V. capacitor should be free.

CAUTION: WHEN REPLACING HIGH VOLTAGE

RECTIFIER ASSEMBLY, ENSURE THAT THE CATHODE (EARTH) CONNECTION IS SECURELY FIXED TO THE CAPACITOR HOLDER WITH AN EARTHING SCREW.

CAUTION: DO NOT REPLACE ONLY HIGH VOLT-

AGE RECTIFIER. WHEN REPLACING IT, REPLACE HIGH VOLTAGE RECTIFIER ASSEMBLY.

Removal

1. CARRY OUT 3D CHECKS.

2. Disconnect the wire leads from the magnetron.

3. Carefully remove the three (3) screws holding the magnetron to the waveguide flange.

4. Lift up magnetron with care so that the magnetron antenna is not hit by any metal object around antenna.

5. Now, the magnetron is free.

Re-install

1. Re-install the magnetron to the waveguide flange with

three (3) screws.

2. Re-connect the wire leads to the magnetron. Refer to "PICTORIAL DIAGRAM".

3. Re-install the outer case and check that the oven is operating properly.

CAUTION: WHEN REPLACING THE MAGNETRON,

BE SURE THE R.F. GASKET IS IN PLACE AND THE MAGNETRON MOUNTING SCREWS ARE TIGHTENED SECURELY.

MAGNETRON REPLACEMENT

1. CARRY OUT 3D CHECKS.

2. Push the lever of positive lock® connector.

3. Pull down on the positive lock® connector.

CAUTION: WHEN CONNECTING THE POSITIVE

LOCK® CONNECTORS TO THE TERMINALS, INSTALL THE POSITIVE LOCK® SO THAT THE LEVER FACES YOU.

POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL

Terminal

Push

Pull down

Lever

Positive lock® connector

Figure C-1. Positive lock® connector

6. Remove the two (2) screws holding the transformer to bottom plate from below.

7. Remove the two (2) screws holding the transformer to bottom plate from above.

8. Remove the transformer.

Wire tight

R-216(G) R-216(IN) R-216(W) R-216(Y)

Figure C-2. Turntable Motor Cover

Figure C-3. Washer and O-ring Installation and

Grease Applying.

REMOVAL

1. CARRY OUT 3D CHECKS.

2. Disconnect the wire leads from the fan motor.

3. Remove the one (1) screw holding the chassis support to the oven cavity front plate.

4. Remove the chassis support .

5. Release the filament lead of the power transformer and the H.V. wire from the fan duct.

6. Remove the one (1) screw holding the light mounting plate to the oven cavity.

7. Release the wire leads (to the oven lamp) from the hole of the fan duct.

8. Remove the one (1) screw holding the fan duct to the waveguide flange.

9. Release the fan motor assembly from the oven cavity.

10.Remove the fan blade from the fan motor shaft according to the following procedure.

11.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 stator of the fan

Bottom Plate

Bridges

Turnrable Motor Cover

Tab

Hole

Cutting Pliers

Screw; XHTSD40P08RV0 or XFPSD40P08K00

FAN MOTOR REPLACEMENT

Washer

O-ring

Base of turntable motor shaft

Turntable motor

O-ring

Washer

Apply the grease here

Removal

1. Disconnect the oven from the power supply.

2. Remove the turntable and turntable support from the oven cavity.

3. Turn the oven over.

4. Cut the four (4) bridges holding the turntable motor cover to the bottom plate with the cutting pliers as shown in Figure C-2.

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 IT IS DIFFICULT TO REMOVE IT OUT OF THE OVEN.

5. Remove the turntable motor cover from the bottom plate.

6. Disconnect the wire leads from the turntable motor.

7. Remove the single (1) screw holding the turntable motor to the oven cavity.

8. Remove the turntable motor from the oven cavity.

TURNTABLE MOTOR REPLACEMENT

9. Remove the O-ring and washer from the turntable motor.

10.Now, the turntable motor is free.

Re-install

1. Remove the any sharp edges on the turntable motor cover and the bottom plate with the cutting pliers.

2. Re-install the O-ring.

3. Apply the grease (Shinetsu silicone grease G-420 of Sinetsu Chemical Co. Ltd. or Toray Silicone grease SH-14 of Toray Silicone Co., Ltd.) to the O-ring and the base of the turntable motor shaft as shown in Figure C-

4. Re-install the turntable motor with the O-ring and washer to the oven cavity with the single (1) screw.

5. Re-connect the wire leads to the turntable motor.

6. Insert the tab of the turntable motor cover into the hole of the bottom plate as shown in Figure C-2.

7. Re-install the turntable motor cover to the bottom plate with one (1) screw XHTSD40P08RV0 or XFPSD40P08K00 as shown in Figure C-2.

motor. Because the rotor is easy to be shaven by pliers and metal pieces may be produced.

• Do not touch the pliers to the coil of the fan motor because the coil may be cut or injured.

• Do not disfigure the bracket by touching with the pliers.

12.Remove the fan blade assembly from the shaft of the fan motor by pulling and rotating the fan blade with your hand.

13.Now, the fan blade will be free.

CAUTION:

• Do not re-use the removed fan blade because the hole (for shaft) may be larger than normal.

14. Remove the two (2) screws holding the fan motor to the fan duct.

15. Now, the fan motor is free.

INSTALLATION

1. Install the fan motor to the fan duct with the two (2) screws.

R-216(G) R-216(IN) R-216(W) R-216(Y)

Power Supply Cord

Oven Cavity Back Plate

Screw

Green/Yelow Wire

Brown Wire

Fuse

Blue Wire

Noise Filter

Power Supply Cord

Oven Cavity Back Plate

Square Hole

Moulding Cord Stopper

Gap

Rotor

Bracket

Stator

Groove joint pliers

Coil

Shaft

Axis

Stator

Rotor

These are the positions that should be pinched with pliers.

Shaft

Table

Center of bracket

Side View

Rear View

2. Install the fan blade to the fan motor shaft according to the following procedure.

3. Hold the center of the bracket which supports the shaft of the fan motor on the flat table.

4. Apply the screw lock tight into the hole (for shaft) of the fan blade.

5. 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 strongly when installed

because the bracket may be transformed.

• Make sure that the fan blade rotates smooth

after installed.

• Make sure that the axis of the shaft is not

slanted.

Removal

1. CARRY OUT 3D CHECKS.

2. Remove the single (1) screw holding the green/yellow

wire to the oven cavity.

3. Disconnect the leads of the power supply cord from the

noise filter, referring to the Figure C-4 (a).

4. Release the moulding cord stopper of the power supply

cord from the square hole of the oven cavity back plate, referring to the Figure C-4 (b).

5. Now, the power supply cord is free.

POWER SUPPLY CORD REPLACEMENT

Re-install

1. Insert the moulding cord stopper of power supply cord into the square hole of the rear cabinet, referring to the Figure C-4 (b).

2. Install the earth wire lead of power supply cord and the earth angle to the oven cavity 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.

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

Figure C-4 (b) Power Supply Cord Replacement

1. CARRY OUT 3D CHECKS.

2. Disconnect the leads from the control unit.

3. Remove the one (1) screw holding the chassis support to the front plate of the oven cavity.

CONTROL PANEL ASSEMBLY REMOVAL

4. Remove the chassis support from the oven.

5. Lift up the control panel and release it from the oven cavity.

6. Now, the control panel assembly is free.

6. Install the fan motor assembly to the oven cavity by

fitting the tabs of the fan duct into the holes of the oven cavity and the waveguide flange.

7. Re-install the light mounting plate to the oven cavity

with the one (1) screw.

8. Insert the end of the chassis support into the slit of the

oven cavity rear cabinet.

9. Re-install the chassis support to the oven cavity front

plate with the one (1) screw.

10. Install the filament lead and the H.V. wire into the hole

of the fan duct .

11. Re-install the wire leads (to the oven lamp) to the hole

of the fan duct.

12. Connect the wire leads to the fan motor, referring to

the pictorial diagram.

R-216(G) R-216(IN) R-216(W) R-216(Y)

Latch Heads

Latch Hook

Door

SW2: Monitor Switch

Monitored Latch Switch

SW3: 2nd. Interlock Relay Control Switch

SW1:

1. CARRY OUT 3D CHECKS. If the monitored latch switch, 2nd. interlock relay control switch and monitor switch do not operate properly due to

a misadjustment, the following adjustment should be made.

2. Loosen the two (2) screws holding the latch hook to the flange of the oven front face.

3. With the door closed, adjust latch hook by moving it back and forth and up and down. In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0.5mm. The horizontal position of the latch hook should be adjusted so that the monitor switch is activated with the door closed. The vertical position of the latch hook should be adjusted so that the 2nd. interlock relay control switch and the monitored latch switch are activated with the door closed.

4. Secure the screws firmly.

5. Check the operation of all switches. If each switch has not activated with the door closed, loosen screw and adjust the latch hook position.

After adjustment, make sure of the following.

1. In and out play of the door remains less than 0.5mm when in the latched position. First check upper position of latch hook, pushing and pulling upper portion of door toward the oven face. Then check lower portion of the latch hook, pushing and pulling lower portion of door toward the oven face. Both results (play in the door) should be less than 0.5mm.

MONITORED LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND

MONITOR SWITCH ADJUSTMENT

2. The monitored latch switch and 2nd. interlock relay control switch interrupt the circuit before the door can be opened.

3. The monitor switch contacts close when the door is opened.

4. The contacts of monitored latch switch and 2nd. interlock relay control switch open within 1.6mm gap between right side of cavity face plate and door when door is open.

5. Re-install outer case and check for microwave leakage around the door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)

Figure C-6. Latch Switch Adjustments

Latch Hook

Pole

Bar

Outward

Tab

SW2:Monitor

Switch

Monitored Latch Switch

SW3: 2nd. Interlock Relay Control Switch

SW1:

1. CARRY OUT 3D CHECKS.

2. Disconnect wire leads from the switches and control panel.

3. Remove the control panel assembly from the oven cavity front flange. Refer to chapter "CONTROL PANEL ASSEMBLY REMOVAL".

4. Remove two (2) screws holding latch hook to oven flange.

5. Remove latch hook assembly from oven flange.

6. To remove the secondary interlock switch.

6-1. Pull out the monitored latch switch from the latch

hook, by pushing outward on the tab that is holding the switch. But the switch will be caught by the bar of the latch hook.

6-2. Then pull out the switch while pushing the plunger of

the switch again.

6-3. Now the monitored latch switch is free.

7. To remove the monitor switch or 2nd. interlock relay control switch.

7-1. With pushing outward on the tab that is holding the

switch, turn the switch so that the pole is an axis.

7-2. Pull out the switch from the latch hook. Do not break

the pole or tab of the latch hook.

7-3. Now the switch is free.

Re-install

1. Re-install each switch in its place. The monitored latch switch is in the lower position and the monitor switch is

MONITORED LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND

MONITOR SWITCH REMOVAL

in the middle position. The 2nd. interlock relay control switch is in the upper position.

2. Re-connect wire leads to each switch. Refer to chapter "Pictorial Diagram".

3. Secure latch hook (with two (2) mounting screws) to oven flange.

4. Re-install the control panel assembly to the oven cavity front flange.

5. Re-connect wire leads to the control unit. Refer to chapter "Pictorial Diagram".

6. Make sure that monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Procedure", and Adjustment Procedure below.

Figure C-5. Latch Switch Removal

R-216(G) R-216(IN) R-216(W) R-216(Y)

Sealer film

Backing film

Adhesive tape

DOOR REPLACEMENT

Putty Knife

Door Frame

Choke Cover

REMOVAL

Disconnect the power supply cord

2. Open the door slightly.

Insert a putty knife (thickness of about 0.5mm) into the gap between the choke cover and corner portion of door panel as shown in Figure C-7 to free engaging parts.

4. Pry the choke cover by inserting a putty knife in order shown in figure C-7.

5. Release choke cover from door panel.

6. Now choke cover is free.

NOTE: When carrying out any repair to the door, do

not bend or warp the slit choke (tabs on the door panel assembly) to prevent microwave leakage.

Figure C-7. Door Disassembly

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

8. Now, door panel is free from oven cavity.

9. Release door panel from ten (10) tabs of door frame and remove door frame by sliding the door panel downward.

10.Now, door panel with sealer film is free.

11.Tear sealer film from door panel.

12.Now, door panel is free.

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

14.Now, latch head and latch spring are free.

15.Remove door screen from door frame.

16.Now, door screen is free.

RE-INSTALL

1. Re-install door screen to door frame.

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

3. Re-install door panel to door frame by fitting ten (10) tabs of door frame to ten (10) holes of door panel.

4. Put sealer film on door panel. Refer to "Sealer Film" and figure C-9, on how to handle the new film.

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 monitored latch switch, 2nd. inter-

lock relay control switch and monitor 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.

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 center 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

SEALER FILM

Installation

1. Put the adhesive tape on the backing film of the sealer film as shown in Fig. C-9.

2. Tear the backing film by pulling the adhesive tape.

3. Put the pasted side of the sealer film on the door panel

mFigure C-9. Sealer film

Lower Oven Hinge

Upper Oven Hinge

Door Panel

Choke Cover

Slit choke

R-216(G) R-216(IN) R-216(W) R-216(Y)

MICROWAVE MEASUREMENT

After adjustment of monitored latch switch, 2nd. interlock relay control switch, 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

R-216(G) R-216(IN) R-216(W) R-216(Y)

TEST DATA AT A GLANCE

PARTS SYMBOL VALUE / DATA Fuse F1 T6.3A 250V High voltage fuse F2 0.6A 5 kV Thermal cut-out TC1 95°C Off / 75˚C On Thermal cut-out TC2 125°C Off Oven lamp OL 240 V 25W High voltage capacitor C 0.91µF AC 2100V Magnetron MG Filament < 1Ω / Filament – chassis ∞ ohm. High voltage transformer T Filament winding < 1Ω

Secondary winding Approx. 185 Ω Primary winding Approx. 2.4 Ω

WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. COOKING TIME PROGRAMMED.

Figure O-2 Oven Schematic-ON Condition

Figure O-1 Oven Schematic-OFF Condition

NOTE: " " indicates components with potential above 250V.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

HIGH VOLTAGE

TRANSFORMER

MG: MAGNETRON

H.V. RECTIFIER

CAPACITOR

0.91µF

AC2100V

TURNTABLE MOTOR

FAN MOTOR

OVEN LAMP

MONITOR SWITCHSW2:

F2:

CONTROL

UNIT

THERMAL CUT-OUT 125˚C (OVEN)

2ND. INTERLOCK RELAY

2ND. INTERLOCK RELAY CONTROL SWITCH

MONITOED LATCH SWITCH

SW1:

SW3:

B1A5

TTM

THERMAL CUT-OUT 95˚C (MG)

TC1:

TC2:

N.O.

RY-1

COM.

RY-2

EARTH

230V

50Hz

BLU

BRN

LIVENEUTRAL

G-Y

FUSE

T6.3A

F1:

LINE CROSS CAPACITOR

0.068µ/AC250V

NOISE SUPPRESSION COIL

LINE BYPASS

CAPACITOR

0.0022µ/AC250V

LINE BYPASS

CAPACITOR

0.0022µ/AC250V

NOISE FILTER

H.V. FUSE

0.6A

HIGH VOLTAGE

TRANSFORMER

MG: MAGNETRON

H.V. RECTIFIER

CAPACITOR

0.91µF

AC2100V

TURNTABLE MOTOR

FAN MOTOR

OVEN LAMP

MONITOR SWITCHSW2:

F2:

CONTROL

UNIT

THERMAL CUT-OUT 125˚C (OVEN)

2ND. INTERLOCK RELAY

2ND. INTERLOCK RELAY CONTROL SWITCH

MONITOED LATCH SWITCH

SW1:

SW3:

B1A5

TTM

THERMAL CUT-OUT 95˚C (MG)

TC1:

TC2:

N.O.

RY-1

COM.

RY-2

EARTH

230V

50Hz

BLU

BRN

LIVENEUTRAL

G-Y

FUSE

T6.3A

F1:

LINE CROSS CAPACITOR

0.068µ/AC250V

NOISE SUPPRESSION COIL

LINE BYPASS

CAPACITOR

0.0022µ/AC250V

LINE BYPASS

CAPACITOR

0.0022µ/AC250V

NOISE FILTER

H.V. FUSE

0.6A

R-216(G) R-216(IN) R-216(W) R-216(Y)

Figure S-1. Pictrorial Diagram

23456

123456

WHT

RED

WHT

HIGH VOLTAGE COMPONENTS

MG: MAGNETRON

HIGH

VOLTAGE

CAPACITOR

H.V.

RECTIFIER

MONITOR

SWITCH

SW2:

SW3:

CN-B

SW1:

TTM:

FM:

TURNTABLE

MOTOR

FAN MOTOR

BLU

WHT

MONITORED

LATCH

SWITCH

COM.

ORG

WHT

RED

WHT

N.C.

N.O.

RED

GRY

BLU

ORG

GRY

2ND. INTERLOCK

RELAY CONTROL

SWITCH

WHT

BLK

HIGH VOLTAGE

TRANSFORMER

F2:

HIGH VOLTAGE

FUSE

G/Y

EARTH

LIVE

NEUTRAL

POWER SUPPLY CORD

NOISE

FILTER

OCEN CAVITY

BACK PLATE

WHT

GRY

WHT

CONTROL UNIT

WHT

RED

ORG

GRY

THERMAL CUT-OUT

(MG.)

TC1:

THERMAL CUT-OUT

(OVEN)

TC2:

ORG

CN-A

RED

GRY

345

BLK

ORG

GRY

RED

321

N.O.

COM.

ORG

CN-A

CN-B

RY2

RY1

ORG

RED

ORG

OL: OVEN LAMP

R-216(G) R-216(IN) R-216(W) R-216(Y)

Figure S-2. Control PanelCircuit

23456

123456

COM

B 1

B 3

–

(J1)

(A)

AC230-240V

50Hz

2ND.

INTERLOCK

RELAY

CONTROL

SWITCH

HIGH

VOLTAGE

TRANSFORMERACOVEN LAMP

FAN MOTOR

TRUNTABLE

MOTOR

R2 2k 1/2w

R61 10k

R60 10k

R62 4.7k

R63 4.7k

R50 150

LD1LD9LD17LD30

LD31

LD32

LD33

LD34

LD18

LD19

LD20

LD21

LD22

LD23

LD24

LD10

LD11

LD12

LD13

LD14

LD15

LD16

LD2

LD3

LD4

LD5

LD6

LD7

LD8

R51 150

R52 150

R53 150

R54 150

R55 150

R56 150

R57 150

C60

C61

SW1

KRA105M

Q50

KRA222M

Q51

KRA222M

Q52

KRA222M

Q53

KRA222M

Q10

KRA101M

D30

NOTE

: IF NOT SPECIFIED 1/4W ± 5%

Q40

KRA101M

Q22

KRA222M

Q20

KRA101M

Q21

KRC243M

(JD)

(JB)

RY2

R1 100 2w

CF1 4MHz

1D3

2D4

3D5

4D6

IC-1

IXA157DR

5D7

6 P20

7 P21

817INT1

18AIN0

19AIN1

20AIN2

21AIN3

22P00

23P01

24P02

P22

(JF) 4.7k

R31 15k

2SB1238

D1-D4

1N4002E

VRS1

C1 1000µ/35v

(J2)(J3)

(J5)

(J7)

(JE)

(J4)

(J6)

C4 47µ/16v

C21

10µ/35v

C5 0.1µ/50v

C2 0.1µ/50v

0.1µ/50v

C10

0.1µ/50v

C20

0.1µ/50v Q24

2SB1238

ZD3

HZ12A3

ZD2 HZ4A2

ZD1 HZ6A3

R3 4.7k

R11 4.7k

R70 15k

SW2

C11

10 11 XOUT 12 XIN 13 V

14 VDD 15 N.F 16

25P03

26P10

27P11

28P12

29P13

30D0

31D1

32D2

INT0

CNVSS

RESET

R30 4.7k

R20 4.7k

1k 1/2w

R10

R40 3.3k

SP1

C30

D22

D20

10G471K

: IF NOT SPECIFIED 1SS270A

: IF NOT SPECIFIED 0.01µF/16V

A 5

(JC)

RY1

D21

(A)

A 3

A 1

R-216(G) R-216(IN) R-216(W) R-216(Y)

Figure S-3. Printed Wiring Board

23456

123456

FA632DR

43 C6

R11

(JD)

(J1)

ZD3

R30

SW2

R70

R63

R51

R50

R40

(J3) (J5)

CF1

(J7)

(JF)

(JC)

C11

C21

Q21

R10

Q24

Q10

D30

D21 D23

D22

D20

CN - B

CN - A

ZD2

R54

R52

ABC

R61

R60

C61

Q53

Q52

Q50

(JE)

R62

SW1

R55

R53

C60

SP1

Q40

C10

Q23

ZD1

CHINGSENG

C - 02V0

OL FM TTM MICRO

Q20

RY3 RY2

VRS1

RY1

Q22

(JB)

(JA)

(J2)

(J4)

(J6)

R31

C30

R20

IC-1

C20

DIP

363534

3332313029

27262524232221

R56

R57

Q51

LD30

LD31

LD32

LD1

LD2

LD3

LD12

LD11

LD13

LD14

LD15

LD16

LD17

LD4

LD18

LD19

LD20

LD21

LD22

LD23

LD24

LD5

LD6

LD7

LD8

LD9

LD10

LD33

LD34

R-216(G) R-216(IN) R-216(W) R-216(Y)

* *

∆*

* * *

PARTS LIST

ELECTRIC PARTS

C RC-QZA295WRZZ High voltage capacitor 1 AV C RC-QZA218WRE0 High voltage capacitor (Interchangeable)for production use 1-F1 QFS-CA027WRZZ Fuse T6.3A 1 AG F2 QFS-IA004WRE0 High voltage fuse 6.3A 1 AK FM RMOTEA403WRZZ Fan motor 1 AZ FM RMOTEA340WRE0 Fan motor (Interchangeable) 1 AX FM RMOTEA389WRE0 Fan motor (Interchangeable) for production use 1 AX MG RV-MZA306WRZZ Magnetron 1 BL OL RLMPTA083WRZZ Oven lamp 1 AM SW1 QSW-MA085WRE0 Monitored latch switch 1 AF SW1 QSW-MA137WRE0 Monitored latch switch (Interchangeable) 1 AH SW2 QSW-MA086WRE0 Monitor switch 1 AF SW2 QSW-MA138WRE0 Monitor switch (Interchangeable) 1 AH SW3 QSW-MA085WRE0 2nd. interlock relay control switch 1 AF SW3 QSW-MA137WRE0 2nd. interlock relay control switch (Interchangeable) 1 AH T RTRN-A650WRZZ High voltage transformer 1 BQ TC1 RTHM-A117WRE0 Thermal cut-out 95˚C (MG) 1 AK TC1 RTHM-A079WRE0 Thermal cut-out 95˚C (MG) (Interchangeable) 1 AH TC2 RTHM-A116WRE0 Thermal cut-out 125˚C (OVEN) 1 AK TC2 RTHM-A078WRE0 Thermal cut-out 125˚C (OVEN) (Interchangeable) 1 AK TTM RMOTDA173WRE0 Turntable motor 1 AX TTM RMOTDA226WRE0 Turntable motor (Interchangeable) 1 AT 1- 1 QACC-A075WRE0 Power supply cord 1 AW 1- 2 FPWBFA347WRKZ

Noise filter

1AX 1- 3 FH-DZA103WRKZ High voltage rectifier 1 AS 1- 3 FH-DZA082WRK0 High voltage rectifier (Interchangeable) 1 AQ 1- 3 FH-DZA087WRK0 High voltage rectifier (Interchangeable) 1 AQ

CABINET PARTS

2- 1 GCABUA696WRP0 Outer case cabinet [R-216(W)] 1 AX 2- 1 GCABUA851WRPZ Outer case cabinet [R-216(IN)] 1 BC 2- 1 GCABUA853WRPZ Outer case cabinet [R-216(G)] 1 BC 2- 1 GCABUA855WRPZ Outer case cabinet [R-216(Y)] 1 BC 2- 2 GDAI-A304WRW0 Bottom plate 1 AF 2- 3 GLEGPA074WRE0 Foot 2 AC

CONTROL PANEL PARTS

3- 1 DPWBFC264WRUZ Control unit 1 BG 3- 1A QCNCMA430DRE0 3-pin connector (CN-A) 1 AG 3- 1B QCNCMA410DRE0 2-pin connector (CN-B) 1 AB C1 VCEAB31VW108M Capacitor 1000 uF 35V 1 AF C2 RC-KZA087DRE0 Capacitor 0.1 uF 50V 1 AA C3 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C4 VCEAB31CW476M Capacitor 47 uF 16V 1 AA C5-6 RC-KZA087DRE0 Capacitor 0.1 uF 50V 2 AA C10 RC-KZA087DRE0 Capacitor 0.1 uF 50V 1 AA C11 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C20 RC-KZA087DRE0 Capacitor 0.1 uF 50V 1 AA C21 VCEAB31VW106M Capacitor 10 uF 35V 1 AA C30 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C60-61 VCKYD11CY103N Capacitor 0.01 uF 16V 2 AA CF1 RCRS-A012DRE0 Ceramic resonator (CST4.00MGW) 1 AD D1-4 RH-DZA006PRE0 Diode (1N4002E) 4 AD D20-22 VHD1SS270A/-1 Diode (1SS270ATA) 3 AA D30 VHD1SS270A/-1 Diode (1SS270ATA) 1 AA IC-1 RH-IXA157DRZZ LSI 1 AT LD1-24 VHPLTL1CHE/-3 Light emitting diode (LED) 24 AD LD30-34 VHPLTL1CHE/-3 Light emitting diode (LED) 5 AD Q1 VS2SB1238//-3 Transistor (2SB1238) 1 AA Q2 VSKRA105M//-3 Transistor (KRA105M) 1 AB Q10 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q20 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q21 VSKRC243M//-3 Transistor (KRC243M) 1 AB Q22 VSKRA222M//-3 Transistor (KRA222M) 1 AB Q24 VS2SB1238//-3 Transistor (2SB1238) 1 AA Q40 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q50-53 VSKRA222M//-3 Transistor (KRA222M) 4 AB R1 VRS-L63DA101J Resistor 100 ohm 2W 1 AD R2 VRD-B12HF202J Resistor 2k ohm 1/2W 1 AB R3 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R10 VRD-B12HF102J Resistor 1k ohm 1/2W 1 AA R11 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA

Note: The parts marked "∆" may cause undue microwave exposure.

The parts marked "*" are used in voltage more than 250V.

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

R-216(G) R-216(IN) R-216(W) R-216(Y)

Note: The parts marked "∆" may cause undue microwave exposure.

The parts marked "*" are used in voltage more than 250V.

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

∆

∆ ∆ ∆

∆

R20 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R30 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R31 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R40 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA R50-57 VRD-B12EF151J Resistor 150 ohm 1/4W 8 AA R60-61 VRD-B12EF103J Resistor 10k ohm 1/4W 2 AA R62-63 VRD-B12EF472J Resistor 4.7k ohm 1/4W 2 AA R70 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA (JF) VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA RY1 RRLY-A111DRE0 Relay (JV12S-KT) 1 AL RY2 RRLY-A105DRE0 Relay (OMIF-S-112LM) 1 AN SP1 RALM-A014DRE0 Buzzer (PKM22EPT) 1 AG SW1 RVR-BA018WRE0 Rotary encoder 1 AH SW2 QSW-PA016DRE0 Tact switch 1 AB T1 RTRNPA121DRE0 Transformer 1 AT VRS1 RH-VZA032DRE0 Varistor (10G471K) 1 AE ZD1 VHEHZ6A3///-1 Zener diode (HZ6A3) 1 AC ZD2 VHEHZ4A2///-1 Zener diode (HZ4A2) 1 AA ZD3 VHEHZ12A3//-1 Zener diode (HZ12A3) 1 AA 3- 2 HPNLTA161WREZ Timer sheet 1 AS 3- 3 JKNBKA651WRFZ Timer knob [R-216(W)] 1 AF 3- 3 JKNBKA676WRFZ Timer knob [R-216(IN)] 1 AL 3- 3 JKNBKA677WRFZ Timer knob [R-216(G)] 1 AL 3- 3 JKNBKA678WRFZ Timer knob [R-216(Y)] 1 AL 3- 4 LHLD-A209WRF0 LED holder 1 AH 3- 5 HPNLCB735WRRZ Control panel [R-216(IN)] 1 AT 3- 5 HPNLCB738WRRZ Control panel [R-216(G)] 1 AT 3- 5 HPNLCB740WRRZ Control panel [R-216(Y)] 1 AT 3- 5 HPNLCB745WRRZ Control panel [R-216(W)] 1 AT 3- 6 JBTN-B120WRFZ Select button [R-216(W)] 1 AC 3- 6 JBTN-B179WRFZ Select button [R-216(IN)] 1 AK 3- 6 JBTN-B180WRFZ Select button [R-216(G)] 1 AK 3- 6 JBTN-B181WRFZ Select button [R-216(Y)] 1 AK 3- 7 XEPSD30P08XS0 Screw; 3mm x 8mm 7 AA

OVEN PARTS

4- 1 PHOK-A127WRFZ Latch hook 1 AL 4- 2 LANGQA530WRWZ Light mount plate 1 AP 4- 3 PCUSUA502WRP0 Waterproof cushion 1 AD 4- 4 LBNDKA038WRP0 Capacitor holder 1 AF 4- 5 NFANJA029WRE0 Fan blade 1 AK 4- 6 PDUC-A694WRF0 Fan duct 1 AG 4- 7 FOVN-A457WRTZ Oven cavity 1 BD 4- 8 GLEGPA073WRF0 Leg 1 AD 4- 9 LANGTA318WRP0 Chassis support 1 AE 4-10 PCUSGA534WRP0 Cushion 1 AF 4-11 PCOVPA276WRE0 Waveguide cover 1 AM 4-12 PCUSUA500WRP0 Cushion 1 AC 4-13 PPACGA097WRE0 O-ring 1 AG 4-14 PCUSUA443WRP0 Cushion 1 AE

DOOR PARTS

5- 1 FDORFA321WRT0 Door panel 1 AT 5- 2 GWAKPA628WRF0 Door frame [R-216(W)] 1 AY 5- 2 GWAKPA861WRTZ Door frame [R-216(IN)] 1 AW 5- 2 GWAKPA863WRFZ Door frame [R-216(G)] 1 AW 5- 2 GWAKPA866WRFZ Door frame [R-216(Y)] 1 AX 5- 3 HPNL-A780WRRZ Door screen 1 AV 5- 4 LSTPPA175WRF0 Latch head 1 AE 5- 5 MSPRTA084WRE0 Latch spring 1 AB 5- 6 PSHEPA622WRE0 Sealer film 1 AG 5- 7 GCOVHA390WRF0 Choke cover 1 AK 5- 8 XCPSD40P08000 Screw : 4mm x 8mm 4 AA

MISCLANEOUS

6- 1 FROLPA090WRK0 Turntable support 1 AQ 6- 2 NTNT-A107WREZ Turntable 1 AU 6- 3 TINSEA944WRRZ Instruction book 1 AM 6- 4 FW-VZB757WRE0 Switch harness 1 AG 6- 5 FW-VZB923WREZ Main wire harness 1 AU 6- 6 TCAUHA168WRR0 H caution label 1 AH 6- 7 LBNDKA153WREZ Wire tight 1 AH

R-216(G) R-216(IN) R-216(W) R-216(Y)

HOW TO ORDER REPLACEMENT PARTS

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

1. MODEL NUMBER

3. PART NO.

2. REF. NO.

4. DESCRIPTION

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

SCREWS AND WASHERS

7- 1 XHPSD40P08K00 Screw : 4mm x 8mm 4 AC 7- 2 LX-EZA042WRE0 Special screw 2 AB 7- 3 LX-WZA028WRE0 Special washer 1 AB 7- 4 XOTSE40P08000 Screw : 4mm x 8mm [R-216(W)/(IN)/(Y))] 4 AA 7- 4 XOTSF40P08000 Screw : 4mm x 8mm [R-216(G)] 4 AA 7- 5 XHTSD40P08RV0 Screw : 4mm x 8mm 5 AA 7- 6 XHPSD30P06000 Screw : 3mm x 6mm 1 AA 7- 7 XOTSD40P12RV0 Screw : 4mm x 12mm 9 AA 7- 8 XOTSD40P08000 Screw : 4mm x 8mm 5 AA 7- 9 LX-CZ0052WRE0 Special screw 2 AA 7-10 XHPSD40P08000 Screw : 4mm x 8mm 3 AA

PACKING AND ACCESSORIES

TURNTABLE TRAY

OPERATION MANUAL

TURNRABLE SUPPORT

INTO THE OVEN CAVITY

Not replaceable items.

TRAY PAD ASSY

(CPADBA244WRK0)

PACKING CASE

MICROWAVE OVEN

TOP PAD ASSEMBLY FPADBA377WRK0

POLYETHYLENG BAG SSAKHA014WRE0

DOOR PROTECTION SHEET SPADPA580WRE0

SPAKCD763WREZ [R-216(W)] SPAKCD764WREZ [R-216(IN)] SPAKCD765WREZ [R-216(G)] SPAKCD766WREZ [R-216(Y)]

FOAM SHEET [for R-216(G)/(Y)] SPAKHA014WREZ

BOTTOM PAD ASSEMBLY FPADBA378WRK0

R-216(G) R-216(IN) R-216(W) R-216(Y)

OVEN PARTS

23456

123456

7-7

2-1

7-7

7-4

7-5

4-6

1-2

4-4

4-9

7-1

7-8

7-9

7-1

7-7

4-1

2-2

7-7

2-3

7-8

7-2

4-13

7-3

TTM

7-5

SW3

SW1

SW2

1-3

7-4

7-1

7-10

7-1

1-8

TC2

TC1

4-10

4-7

4-11

6-2

6-1

4-8

6-6

1-1

4-5

7-6

4-12

4-14

7-8

4-3

7-8

4-2

R-216(G) R-216(IN) R-216(W) R-216(Y)

CONTROL PANEL PARTS

DOOR PARTS

MISCELLANEOUS

23456

123456

5-3

5-5

5-2

5-4

5-8

6-5

6-4

6-7

5-6

5-7

5-1

3-3

3-6

Actual wire harness may be different than illustration.

3-5

3-2

3-4

3-7

3-1

R-216(G) R-216(IN) R-216(W) R-216(Y)

'02 SHARP CORP. (5S1.31E)

No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

Sharp R-216(G), R-216(IN), R-216(W), R-216(Y) Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual