Sharp R23-004 Schematic

Download

SER VICE MANUAL

SY911R23ATH/

COMMERCIAL

MICROWAVE OVEN

R-22AM R-23AM R-23AT

1800W/R-23AT

x 2

MODELS

R-22AM R-23AM R-23AT

R-23AT

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

TABLE OF CONTENTS

Page

CAUTION, MICROWAVE RADIATION....................................................................... INSIDE FRONT COVER

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

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

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

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

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

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

FUNCTION OF IMPORTANT COMPONENTS ................................................................................................ 9

TROUBLESHOOTING GUIDE ........................................................................................................................10

TEST PROCEDURE ........................................................................................................................................12

TOUCH CONTROL PANEL ASSEMBLY ........................................................................................................20

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ........................................................... 31

MICROWAVE MEASUREMENT .................................................................................................................... 38

TEST DATA AT A GLANCE ........................................................................................................................... 39

WIRING DIAGRAM ......................................................................................................................................... 39

PICTORIAL DIAGRAM ................................................................................................................................... 41

CONTROL PANEL CIRCUIT ...........................................................................................................................42

PRINTED WIRING BOARD .............................................................................................................................45

PARTS LIST ................................................................................................................................................... 46

SHARP CORPORATION

R-22AM R-23AM R-23AT

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.

SERVICE MANU AL

COMMERCIAL MICROWAVE OVEN

R-22AM/ R-23AM/ R-23AT

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.

SERVICING

PRODUCT SPECIFICATIONS

GENERAL INFORMATION

APPEARANCE VIEW

R-22AM R-23AM R-23AT

CAUTION MICROWAVE RADIATION DO NOT BECOME EXPOSED TO RADIATION FROM THE MICROWAVE GENERATOR OR OTHER PARTS THAT CONDUCT MICROWAVE ENERGY.

WARNING

Note: The parts marked "*" are used in voltage more

than 250V. (Parts List)

Anm: Delar märket med "*" har en spänning

överstigande 250V.

Huom: Huolto-ohjeeseen merkitty "tähdella" osat joissa

jännite on yli 250 V.

Bemerk: Deler som er merket "asterisk" er utsatt for

spenninger over 250V til jord.

Bemærk: "Dele mærket med stjerne benyttes med højere

spænding end 250 volt.

WARNING

OPERATING SEQUENCE

FUNCTION OF IMPORTANT COMPONENTS

TROUBLESHOOTING GUIDE AND TEST PROCEDURE

TOUCH CONTROL PANEL

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

MICROWAVE MEASUREMENT

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.

All the parts marked "*" on parts list are used at voltage more than 250V.

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

TEST DATA AT A GLANCE

WIRING DIAGRAM

PARTS LIST

R-22AM R-23AM R-23AT

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, High voltage transformer, Magnetron, High voltage rectifier assembly, High voltage fuses, High voltage harness.

REMEMBER TO CHECK 3D

1) Disconnect the supply.

2) Door opened, and wedged open.

3) Discharge two high voltage capacitors.

WARNING: AGAINST THE CHARGE OF THE TWO

HIGH-VOLTAGE CAPACITORS

The two high-voltage capacitors remains charged about 60 seconds after the oven has been switched off. Wait for 60 seconds and then short-circuit the connection of the two high-voltage capacitors (that is, of the connecting lead of the high-voltage 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 then disconnect the leads to the primary of the two High voltage transformers. 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 checks and reconnect the leads to the primary of the two High voltage transformers.

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.

3D checks and

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 one (1) minute. When the one minute 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 should be carried out.

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-22AM R-23AM R-23AT

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 hay a 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.

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.

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

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.

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.

R-22AM R-23AM R-23AT

I I forni a microonde contengono un circuito elettrico in grado di generare tensioni e correnti estremamente elevate.

L’eventuale contatto con i seguenti componenti può causare la folgorazione: condensatore ad alta tensione; trasformatore ad alta tensione; magnetron; rettificatore alta tensione; cablaggio ad alta tensione.

TRE OPERAZIONI IMPORTANTI PER INCOMINCIARE

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'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.

1800W/R-23AM

/100%

/ 50%

/ 20%

/ 10%

R-23AM

PRODUCT DESCRIPTION

SPECIFICATION

ITEM DESCRIPTION

Power Requirements 230 Volts

50 Hertz

Single phase, 3 wire earthed Power Comsumption Power Output

Case Dimensions Width Height Depth

Cooking Cavity Dimensions Width Height Depth

Control Complement for R-23AT Touch Control System

2.4 kW Approx. 11 A [R-22AM] / 2.9 kW Approx. 13 A [R-23AM, R-23AT]

1500 W [R-22AM]/ 1800 W [R-23AM/23AT] nominal of RF microwave energy

(measured by method of IEC 60705)

Operating frequency 2450 MHz

510mm 335 mm 470mm

330 mm 180 mm 330mm

The combination of cooking time and microwave power

The oven can be programmed a series of up to 3 cookling stages.

The combination of microwave power and cooking time that can be input as

folllows.

Cooking Sequence Micrwave power levelthat can be iused. Cooking time that can be iused.

1 Stage only 0-100% Max. 30 minutes

0-40% all stages Max. 30 minutes any stages

2 or 3 Stage

50-100% Max. 30 minutes for 3 stages

R-22AM R-23AM R-23AT

Max. 60 minutes for 2 stages Max. 90 minutes for 3 stages

NOTE:If the oven used with the power level above 40% on any stage, the

maximum cooking time is 30 minutes in total.

Microwave Power level

100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0%

MANUAL / REPEAT key, NUMBER keys

POWER LEVEL key, STOP / CLEAR key

START Key, DOUBLE QUANTITY key

DEFROST key, SET key

CHECK key, VOLUME key

Control Complement for R-22AM/23AM

Electronic Timer (0 - 30 minutes)

Microwave Power level

100% 50% 20% 10%

MICROWAVE POWER SETTING buttons

START button Set Weight Approx. 33 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-22AM R-23AM R-23AT

OVEN

1. Control panel

2. Hole for safety door latches

3. Ceramic floor

4. Splash cover

5. Oven light

6. Air intake filter

7. Air intake openings

8. Oven cavity

9. Door seals and sealing surfaces

10. Door hinges

11. Oven door with see-through window

12. Door safety latches

13. Door handle.

14. Outer cabinet

15. Removable cover over oven light bulb

16. Air vent openings

17. Power supply cord 18 Mounting plate 19 Screw for mounting plate

DISPLAY AND INDICATORS for R-23AT

Check indicators after the oven starts to confirm the oven is operating as desired.

1. Cook indicator This indicator shows cooking in progress.

2. Memory number indicator

3. Defrost indicator

4. Check mode indicator

5. Power level display

6. Digital display

7. Filter indicator

8. Double quantity mode indicator

9. 3rd. stage indicator

10. 2nd. stage indicator

11. 1st. stage indicator

OPERATING KEYS

12. DOUBLE QUANTITY key

13. DEFROST key

14. NUMBER keys

15. MANUAL/ REPEAT key

16. STOP/CLEAR key

17. POWER SLEVEL key

18. START key

19. SET key

20. VOLUME key

21. CHECK key

15 17

APPEARANCE VIEW

NUMBER

1 2 3

DOUBLE

x 2

DEF

CHECK

FILTER

679

AUTO TOUCH CONTROL PANEL

POWER

1 2 3 4 5 6 7 8 9 0

DISPLAY AND INDI-

CATORS for R-22AM,

R-23AM

Check indicators after the oven starts to con-

firm the oven is operating as desired.

1. Cook indicator This indicator shows cooking in progress.

2. Digital display

3. Microwave power level display

OPERATING KEYS

4. HIGH 100%

5. MEDIUM 50%

6. MED LOW 20%

7. DEFROST 10%

8. ELECTRONIC TIMER

18 20

Rotate the control to enter cooking time.

9. START button

/100%

/ 50%

/ 20%

/ 10%

MICROWAVE POWER LEVEL buttons

POWER

INSTALLATION INFORMATION

When this commercial microwave oven is installed near other commercial electrical appliances, connect a lead wire to each equivalent potential terminal with equipotential marking between them (insert a lead wire between a washer and an earth angle, and screw them), as shown in Fig. A-1, to make sure that they are at equivalent potential. If any lead wire is not connected between them, when person touch them he/she will get a electric shock.

COMMERCIAL MICROWAVE OVEN OTHER COMMERCIAL 

Equipotential marking

Lead wire

Screw

Washer

Earth angle (Equivalent potential terminal)

Lead wire

Figure A-1

ELECTRICAL APPLIANCE

Equivalent  potential terminal

OPERATION SEQUENCE

R-22AM R-23AM R-23AT

Closing the door activates all door interlock switches (1st latch switch, 2nd latch switch, 3rd latch switch and stop switch).

IMPORTANT

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 (230 volts, 50Hz), the line voltage is supplied to the point A5+A7 in the control panel through the noise filter.

Figure O-1 on page 39

1. The digital display shows .

IDLE CONDITION

When the door is opened, the contacts of the 1st. latch switch SW1, 2nd. latch switch SW2, 3rd. latch switch SW3 and stop switch SW5 open, initiating the following:

Figure O-2 on page 40

1. A signal is input to the control unit energizing the coil of shut-off relay RY-1.

2. The shut-off relay RY-1 contacts close completing circuits to turn on the oven lamp, blower motor and stirrer motors.

3. If the door remains open, 60 seconds later the control unit de-energizes shut-off relay RY-1 turning off the oven lamp, blower motor and stirrer motors.

When the door is closed, the contacts of the 1st. latch switch SW1, 2nd. latch switch SW2, 3rd. latch switch SW3 and stop switch SW5 close. With the closing of the stop switch SW5 contacts, an additional circuit is provided which will permit the operation of the oven when one of the touch pads is depressed. Since the control is enabled through the stop switch SW5, the door must be closed before the touch pads will be effective. When the door is closed, a full 60 second IDLE condition is always provided for selecting and pressing the desired touch pads. A 60 second IDLE condition will also follow the end of each cook cycle.

the two high voltage transformers. 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 RY3+RY4 (for R-23AT)/ RY2+RY3 (for R22AM/23AM) go back to their home position. The circuits to the high voltage transformers T1+T2. The relay RY1 remains and oven lamp, blower motor and stirrer motors work for 1 minute.

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

CONDITION DURING DOOR OPEN

SWITCH CONTACT COOKING 1st latch switch COM-NO Closed Open Monitor switch COM-NC Open Closed 2nd latch switch COM-NO Closed Open Stop switch COM-NO Closed Open 3rd latch switch COM-NO Closed Open

(NO COOKING)

The circuits to the high voltage transformers T1+T2 are cut off when the 1st latch, 2nd latch, 3rd latch and stop switches SW1+SW2+SW3+SW5 are made open. The blower motor BM, stirrer motors and oven lamp remains on even if the oven door is opened after the cooking cycle has been interrupted, because the relay RY1 stays closed. Shown in the display is the remaining time, but the program is cancelled if the oven is not started within 3 minutes.

MICROWAVE COOKING CONDITION

for R-23AT

Touch MANUAL/ REPEAT key and enter a desired cooking time with the touching NUMBER key. And then touch START key.

Function sequence Figure O-3 on page 40

CONNECTED COMPONENTS RELAY Oven lamp/ Blower motor/ Stirrer motors RY1 High voltage transformer T1 RY3 High voltage transformer T2 RY4

for R-22AM/23AM

Enter a desired cooking time with the turning ELECTRONIC TIMER knob. And then push STARTbutton.

Function sequence Figure O-3 on page 40

CONNECTED COMPONENTS RELAY Oven lamp/ Blower motor/ Stirrer motors RY1 High voltage transformer T1 RY2 High voltage transformer T2 RY3

1. The line voltage is supplied to the primary winding of

6. MONITOR SWITCH CIRCUIT The monitor switch SW4 is mechanically controlled by oven door, and monitors the operation of the 1st latch switch SW1.

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

cycle of a cooking program, the 1st, 2nd, 3rd latch and stop switches SW1+SW2+SW3+SW5 must open their contacts first. After that the contacts (COM-NC) of the monitor switch SW4 can be closed.

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

NC) of the monitor switch SW4 must be opened first. After that the contacts (COM-NO) of the 1st, 2nd, 3rd latch and stop switches SW1+SW2+SW3+SW5 must be closed.

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

1st latch switch SW1 remain closed, remains closed, the fuse F2 F6.3A will blow, because the monitor switch is closed and a short circuit is caused.

MICROWAVE VARIABLE COOKING (for R-23AT)

When the microwave oven is preset for variable cooking power, the line voltage is supplied to the high voltage

R-22AM R-23AM R-23AT

transformers T1+T2 intermittently within a 48 second time base through the contacts of the relays RY3+RY4. The following levels of microwaves power are given.

 48 sec. ON Number key   44sec. ON Number key 9  40 sec. ON Number key 8  36 sec. ON Number key 7  32 sec. ON Number key 6  26 sec. ON Number key 5  22 sec. ON Number key 4  16 sec. ON Number key 3  12 sec. ON Number key 2  8 sec. ON Number key 1  0 sec. ON Number key 0

TWO MAGNETRON OPERATION SYSTEM

Two magnetrons MG1+MG2 are equipped in order to get higher microwave power output. The primary windings of the high voltage transformers T1+T2 are connected so that each magnetron can be oscillated alternatively according to the frequency of the power supply. Refer to the Figure B-1 and B-2.

T2: HIGH VOLTAGE TRANSFORMER

(REAR)

H. V. FUSE H. V. FUSE

H. V. RECTIFIER

MG2: MAGNETRON (LOWER)

C2: H.V. CAPACITOR

H. V. RECTIFIER

Figure B-1. High Voltage Circuit

MG1: MAGNETRON (UPPER)

T1: HIGH VOLTAGE TRANSFORMER

(FRONT)

C1: H.V. CAPACITOR

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.

MICROWAVE VARIABLE COOKING (for R-22AM and R-23AM)

When the microwave oven is preset for variable cooking power, the line voltage is supplied to the high voltage transformers intermittently within a 48 second time base through the contacts of the relays RY2+RY3. The following levels of microwaves power are given.

 48 sec. ON  100%   26sec. ON  50%  12 sec. ON  20%  8 sec. ON  10%

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.

OPERATION OF MAGNETRON

COMMERCIAL FREQUENCY (50HZ)

POWER OUTPUT BY MAGNETRON T1

POWER OUTPUT BY MAGNETRON T2

Figure B-2. Operation of Magnetron

FUNCTION OF IMPORTANT COMPONENTS

R-22AM R-23AM R-23AT

DOOR OPEN MECHANISM

1. The door release lever is pulled.

2. The upper latch head is lifted up by the linked door release lever.

3. The head lever is lifted up by the door release lever.

4. The joint lever is lifted up by the head lever.

5. The lower latch head is lifted up by the joint lever.

6. Now both latch heads are lifted up, so they can be released from the latch hook.

7. Now the door can be opened.

Door release lever

Joint lever

Head lever

Latch head

SW4: Monitor switch

Latch hook

SW2: 2nd. latch switch SW1: 1st. latch switch

SW5: Stop switch

SW3: 3rd. latch switch

Figure D-1. Door Open Mechanism

1ST LATCH SWITCH SW1, 2ND LATCH SWITCH SW2, 3RD LATCH SWITCH SW3 AND STOP SWITCH

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

2. When the oven door is opened, the contacts COM-NO must be opened.

SW5

MONITOR SWITCH SW4

The monitor switch SW4 is activated (the contacts opened) the upper latch head and switch lever A while the door is closed. The switch is intended to render the oven inoperative by means of blowing the fuse F2 F6.3A when the contacts of the 1st latch switch SW1 fail to open when the door is opened.

Function

1. When the door is opened, the monitor switch SW4 contacts close (to the ON condition) due to their being normally closed. At this time the 1st latch switch SW1 is in the OFF condition (contacts open) due to their being normally open contact switches.

2. As the door goes to a closed position, the monitor switch SW4 contacts are opened and 1st latch switch SW1 contacts are closed (On opening the door, each of these switches operate inversely.)

3. If the door is opened and the 1st latch switch SW1 contacts fail to open, the fuse F2 F6.3A blows simultaneously with closing of the monitor switch SW4 contacts.

CAUTION:BEFORE REPLACING A BLOWN FUSE F2

F6.3A TEST THE 1ST LATCH SWITCH SW1, MONITOR SWITCH SW4 AND MONITOR RESISTOR R1 FOR PROPER OPERATION. (REFER TO CHAPTER “TEST PROCEDURE”).

MONITOR RESISTOR R1

The monitor resistor R1 prevents the fuse F2 F6.3A 250V bursting when the fuse F 2 F6.3A 250V blows due to the operation of the monitor switch SW4.

NOISE FILTER

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

WEAK POINT F1

If the wire harness or electrical components make a shortcircuit, this weak point F1 blows to prevent an electric shock or fire hazard.

FUSE F2 F6.3A 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 F2 also blows when 1st latch switch SW1 remains closed with the oven door open and when the monitor switch closes.

FUSE(S) F3, F4 M8A

If the wire harness or the high voltage transformers T1, T2 are short-circuited, these fuses F3 and /or F4 blow to prevent an electric shock or fire hazard.

HIGH VOLTAGE FUSE(S) F5, F6

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

MAGNETRON TEMPERATURE FUSES TF1, TF2

The temperature fuses TF1, TF2 located on the top of the upper and lower waveguide, are designed to prevent damage to the magnetrons MG1, MG2. If an over heated condition develops in the tube due to blower motor failure, obstructed air ducts, dirty or blocked air intake, etc., the circuit to the magnetrons are interrupted. Under normal operation, the temperature fuses remains closed. However, when abnormally high temperatures are generated within the magnetrons, the temperature fuses will open at 150˚C causing the microwave energy to stop. The defective temperature fuses must be replaced with new rated ones.

OVEN TEMPERATURE FUSE TF4

The temperature fuse TF4, located on the side of the exhaust duct assembly, is designed to prevent damage to the oven by fire. If the food load is overcooked, by either error in cook time or defect in the control unit, the temperature fuse will open. Under normal operation, the oven temperature fuse remains closed. However, when abnormally high temperatures are generated within the oven

R-22AM R-23AM R-23AT

cavity, the oven temperature fuse will open at 120˚C, causing the oven to shut down. The defective temperature fuse must be replaced with new rated one.

BLOWER MOTOR TEMPERATURE FUSE TF3

This temperature fuse TF3 protects the blower motor against overheating. If its temperature goes above 120˚C because the blower motor is stalled or the ventilation openings are blocked, the contacts of the temperature fuse will open. The line voltage to the control unit will be cut off and the operation of the oven will be stopped. The defective temperature fuse must be replaced with a new one.

OVEN THERMISTOR (1)

The thermistor is a negative temperature coefficient type. The temperature in the exhaust duct is detected through the resistance of the thermistor. If the temperature is high, the control panel will display “EE7” and the oven will stop to avoid overheating and catching fire. If the thermistor is open, the control panel will display "EE6" and the oven will stop.

OVEN THERMISTOR (2)

This thermistor detects temperature of the oven cavity bottom plate. The thermistor is a negative temperature coefficient type. The temperature is detected through the resistance of the thermistor. If the temperature is high, the control will display “EE17” and the oven will stop.

MAGNETRON THERMISTOR

The thermistor is a negative temperature coefficient type. The air temperature around the upper magnetron is detected through the resistance of the thermistor. If the temperature is high, the control panel will display "EE17" and the oven will stop to protect the lower magnetron against overheat. If the oven thermistor (2) and the magnetron thermistor are open at the same time, the control panel will display "EE16" and the oven will stop.

BLOWER MOTOR BM

The blower motor BM drives a blade which draws external cool air into the oven. This cool air is directed through the air vanes surrounding the magnetrons and cools the magnetrons. 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.

STIRRER MOTORS SM

The upper and lower stirrer motors SM drive stirrer antennas to stir the microwave radiation from the upper and lower waveguides.

OVEN LAMP OL

The oven cavity light illuminates the interior of the oven so that food being cooked can be examined visually through the door window without having to open the door. The oven lamp is on during the cooking cycle and idle condition.

TROUBLESHOOTING GUIDE

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 F6.3A in the 1st latch switch SW1 - monitor

switch SW4 - monitor resisitor R1 circuit, check the 1st latch switch SW1, monitor switch SW4 and monitor resistor R1 before replacing the fuse F2 F6.3A

A ABBCC DDEEEEEFFGHI I I I JKKKL LN M OQQQR P

 KEY UNIT [for R-23AT], or SWITCH UNIT [for R-22AM/23AM] Temperature of oven thermistor (2) is high. Temperature of oven thermistor (1) is high. Temperature of magnetron thermistor is high. Due to programme lock Over the max. cooking time [for R-23AT] No power at wall outlet HOME FUSE or BREAKER Mis adjustment of switches FOIL PATTERN RELAY RY-4 [for R-23AT], RY3 [for R22AM/23AM] RELAY RY-3 [for R-23AT], RY2 [for R-22AM/23AM] RELAY RY-1 TOUCH CONTROL PANEL Opened wire harness Shorted wire harness FUSE HOLDERS POWER SUPPLY CORD NOISE FILTER OVEN LAMP OR SOCKET HIGH VOLTAGE FUSE(S) F5, F6 BLOWER MOTOR BM STIRRER MOTORS SM OVEN THERMISTOR (2) OVEN THERMISTOR (1) MAGNETRON THERMISTOR MONITOR RESISTOR R1 OVEN TEMPERATURE FUSE TF4 B. MOTOR TEMPERATURE FUSE TF3 MAGNETRON TEMPERATURE FUSE TF2 MAGNETRON TEMPERATURE FUSE TF1 FUSE F6.3A F2 FUSE F13A F1 FUSE M8A F4 FUSE M8A F3 STOP SWITCH SW5 MONITOR SWITCH SW4  3RD. LATCH SWITCH SW3 2ND. LATCH SWITCH SW2  1ST. LATCH SWITCH SW1  H.V. CAPACITOR C2 H.V. CAPACITOR C1 H.V. WIRE HARNESS H.V. RECTIFIER ASSEMBLY FOR MG2 H.V. RECTIFIER ASSEMBLY FOR MG1 HIGH VOLTAGE TRANSFORMER T2 HIGH VOLTAGE TRANSFORMER T1 MAGNETRON MG2 MAGNETRON MG1

R-22AM R-23AM R-23AT

TESTPROCEDURE

AND

POSSIBLE CAUSE

DEFECTIVE PARTS

PROBLEM

“ . “ does not appear on display when power cord is plugged into

wall outlet.

Control panel can not accept key in.

Fuse F2 F6.3A blows when the door is opened. 

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

Weak point F1 blows when power cord is plugged into wall outlet.

Oven lamp, fan motor and stirrer motors do not work for 1 minute

when the door is opened or after cooking.

Fuse F2 F6.3A blows when power cord is plugged into wall outlet. 

Oven lamp does not light when door is opened. (Blower and stirrer

motors work)

Blower motor does not work when door is opened. (Oven lamp

lights and stirrer motors work)

“EE 1” (Magnetron MG1 failure) 

“EE 2” (Magnetron MG2 failure)

“EE 3” (Magnetron MG1 and MG2 failure) 

“EE 6” (Thermistor (1) failure) 

“EE 7” (Exhaust air temperature is high) 

“EE 9” (Exceeded max. heating time) for R-23AT

Oven lamp, blower motor and stirrer motors do not work. 

Oven lamp does not work. 

OFF

CONDITION

Blower motor does not work. 

Oven does not stop after end of cooking cycle. (Oven lamp, blower

motor and stirrer motors stop.)

Home fuse blows when starting the oven.

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

It passed more than 1 minute after cooking but oven lamp, blower

motor and stirrer motors do not stop.

“EE 16” (Thermistor of MG. and (2) are open.) 

“EE 17” (Magnetron temperature is high.) 

“EE 8” (Relay melt short)

Stirrer motors do not work.



ON

CONDITION

R-22AM R-23AM R-23AT

TEST PROCEDURES

PROCEDURE

LETTER COMPONENT TEST

A MAGNETRON TEST

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

CARRY OUT 3D CHECKS. Isolate the magnetron from high voltage circuit by removing all leads connected to filament terminal. To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron

filament terminals, the meter should show a reading of less than 1 ohm. To test for short 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 (1 litre water load)

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

The formula is as follows;

P x t / 4.187 = V x ∆ T+ 0.55 x mc (T2-T0) P (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 time28 sec. [R-22AM] / 23sec. [R-23AM/23AT] Mass of container (mc) .........330 g

T2............... Final temperature P = 150 x ∆T [R-22AM] / P = 180 x ∆T [R-23AM, R-23AT]

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±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 be an accurate thermometer.

7. The water load must be (1000±5) g.

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

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

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 until 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.

TEST PROCEDURES

HIGH VOLTAGE RECTIFIER

PROCEDURE

LETTER COMPONENT TEST

Room temperature ................................................................................................. T0 = 21°C

Initial temperature .................................................................................................. T1 = 11°C

Temperature after (28 + 3) = 31 sec [for R-22AM]................................................. T2 = 21°C

Temperature after (23 + 3) = 26 sec [for R-23AM/23AT] ....................................... T2 = 21°C

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

Measured output power

The equation is “P = 150 x ∆T” [for R-22AM] .......................... P = 150 x 10°C = 1500 Watts

The equation is “P = 180 x ∆T” [for R-23AM/23AT] ................ P = 180 x 10°C = 1800 Watts

JUDGMENT: The measured output power should be within the range of ± 15 % of the rated output

power.

CAUTION: 1°C CORRESPONDS TO 150 WATTS [R-22AM]/ 180 WATTS [R-23AM, R-23AT]. REPEAT

MEASUREMENT IF THE POWER IS INSUFFICIENT.

1000g

R-22AM R-23AM R-23AT

1000g

T1˚C

Heat up for 31 sec. for R-22AM

Heat up for 26 sec. for R-23AM/ R-23AT

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 windings. The following readings should be obtained:-

a. Primary winding approximately 1.8 Ω approximately 1.2 Ω b. Secondary winding approximately 75 Ω approximately 75 Ω c. Filament winding less than 1 Ω

1000g

T2˚C

R-22AM R-23AM, R-23AT

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 ASSEMBLY 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.

R-22AM R-23AM R-23AT

TEST PROCEDURES

PROCEDURE

LETTER COMPONENT TEST

D HIGH VOLTAGE CAPACITOR TEST

CARRY OUT 3D CHECKS. A. Isolate the high voltage capacitor from the circuit.

B. Continuity check must be carried out with measuring instrument which is set to the highest

resistance range.

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

after it has been charged.

D. A short-circuited capacitor shows continuity all the time. E. An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ

resistance.

F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance. G. The resistance across all the terminals and the chassis must be infinite when the capacitor is

normal.

If incorrect reading are obtained, the high voltage capacitor must be replaced. CARRY OUT 4R CHECKS.

E SWITCH TEST

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

Table: Terminal Connection of Switch

Plunger Operation COM to NO COM to NC

Released Open circuit Short circuit Depressed Short circuit Open circuit

If incorrect readings are obtained, make the necessary switch adjustment or replace the switch. CARRY OUT 4R CHECKS.

F FUSE F3, F4 M8A TEST

CARRY OUT 3D CHECKS.

If the fuses F3 and/or F4 M8A are blown, there could be shorts in the high voltage transformers T1 and/ or T2 or there is a ground in wire harness. Check and/ or replace the high voltage transformers T1 and/ or T2 or repair the wire harness.

CARRY OUT 4R CHECKS.

CAUTION: Only replace

G WEAK POINT F1 TEST

CARRY OUT 3D CHECKS.

COM; Common terminal, NO; Normally open terminal NC; Normally close terminal

fuses F3, F4 M8A with the correct value replacement.

If the weak point F1 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 weak point F1 with the correct value replacement.

H FUSE F2 F6.3A TEST

CARRY OUT 3D CHECKS. If the fuse F2 F6.3A is blown when the door is opened, check the 1st. latch switch SW1, monitor switch

SW4 and monitor resistor R1. If the fuse F2 F6.3A is blown by incorrect door switching replace the defective switch(s) and the fuse F2 F6.3A.

CARRY OUT 4R CHECKS. CAUTION: Only replace fuse F2 F6.3A with the correct value replacement.

TEST PROCEDURES

PROCEDURE

LETTER COMPONENT TEST

I TEMPERATURE FUSE TEST

1. CARRY OUT 3D CHECKS.

2. A continuity check across the temperature fuse terminals should indicate a closed circuit unless the temperature of the temperature fuse reaches specfied temperature as shown below.

Open Close Display or temperature temperature Condition Check point

Magnetron temperature fuse

Blower motor temperature fuse

Oven temperature fuse

TF4

TF1

TF2

TF3

150˚C

120˚C

Non resetable type

EE1

EE3

EE2 Oven shut

off Oven shut

off

3. CARRY OUT 4R CHECKS.

CAUTION: IF THE temperature fuse INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE,

REPLACE temperature fuse.

R-22AM R-23AM R-23AT

Magnetron Test magnetron

Magnetron MG1, MG2 Failure: Test magnetron MG1, MG2. Check blower fan motor and ventilation opening.

Magnetron MG2 Failure: Test magnetron

Check blower fan motor and ventilation opening or rocked rotating of blower fan motor.

Food has been burned in oven. Temperature of oven inside is very high.

MG1 Failure:

MG1 and Blower fan motor.

MG2 and Blower fan motor.

J MONITOR RESISTOR R1 TEST

CARRY OUT 3D CHECKS. Disconnect the leads from the monitor resistor R1. Using an ohmmeter and set on a low range. Check

between the terminals of the monitor resistor R1.

The resistance of monitor resistor R1 should be read approx. 4.3Ω. If incorrect readings are obtained, replace the monitor resistor R1. CARRY OUT 4R CHECKS.

K THERMISTOR TEST

1. CARRY OUT 3D CHECKS.

2. Follow the procedures below for each thermistor. 2-1. MAGNETRON THERMISTOR TEST

Disconnect the connector of the magnetron thermistor from the switch harness. Measure the resistance of the magnetron thermistor with an ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

Room Temp. 59˚F (15˚C) 68˚F (20˚C) 77˚F (25˚C)

Resistance Approx. 373 kΩ Approx. 292 kΩ Approx. 231 kΩ If the meter does not indicate above resistance, replace the thermistor. 2-2. OVEN THERMISTOR (1) TEST

Disconnect the connector of the oven thermistor (1) from the switch harness. Measure the resistance of the oven thermistor (1) with an ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

Room Temp. 59˚F (15˚C) 68˚F (20˚C) 77˚F (25˚C)

Resistance Approx. 373 kΩ Approx. 292 kΩ Approx. 231 kΩ If the meter does not indicate above resistance, replace the thermistor. 2-3. OVEN THERMISTOR (2) TEST

Disconnect the two connectors of the magnetron thermistor and oven thermistor (2) from the switch harness. Measure the resistance of the oven thermistor (2) with an ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

R-22AM R-23AM R-23AT

TEST PROCEDURES

PROCEDURE

LETTER COMPONENT TEST

Room Temp. 59˚F (15˚C) 68˚F (20˚C) 77˚F (25˚C) Resistance Approx. 16 kΩ Approx. 13 kΩ Approx. 11 kΩ

If the meter does not indicate above resistance, replace the thermistor.

3. CARRY OUT 4R CHECKS.

L MOTOR WINDING TEST

CARRY OUT 3D CHECKS. Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two terminals.

Resistance of Blower motor should be approximately 52Ω.

Resistance of Stirrer motor should be approximately 8.8 kΩ. If incorrect readings are obtained, replace the motor. CARRY OUT 4R CHECKS.

M 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 POINT INDICATION OF OHMMETER

Between N and L Approx. 680 kΩ Between terminal N and WHIT Short circuit Between terminal L and BLK Short circuit

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

N HIGH VOLTAGE FUSE TEST

CARRY OUT 3D CHECKS. If the high voltage fuse 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 replacement.

O TOUCH CONTROL PANEL ASSEMBLY TEST FOR R-23AT

LINE CROSS CAPACITOR 0.22µF/ AC250V

LINE CROSS CAPACITOR 

10000 pF/ AC250V

WHT

NOISE FILTER

F1 : WEAK POINT

NOISE SUPPRESSION COIL

DISCHARGE RESISTOR 680 kΩ 1/2W

DISCHARGE RESISTOR 10 MΩ 1/2W

LINE CROSS CAPACITOR 

10000 pF/ AC250V

BLK

The touch control panel consists of circuits including semiconductors such as LSI, IC, etc. Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key Unit, troubleshooting by unit replacement is described according to the symptoms indicated.

1. Key Unit Note : Check key unit ribbon connection before replacement.

The following symptoms indicate a defective key unit. Replace the key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching the pads, sometimes a pad produces no signal.

2. Control Unit

The following symptoms may indicate a defective control unit. Replacing the control unit. Before replacing the control unit, perform the key unit test (Procedure P) to determine if control unit is faulty.

2-1 Programming problems.

a) When touching the pads, a certain group of pads do not produce a signal.

TEST PROCEDURES

PROCEDURE

LETTER COMPONENT TEST

2-2 Display problems.

a) For a certain digit, all or some segments do not light up. b) For a certain digit, brightness is low. c) Only one indicator does not light. 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.

2-3 Other possible problems caused by defective control unit.

a) Buzzer does not sound or continues to sound. b) Cooking is not possible.

CONTROL PANEL ASSEMBLY TEST FOR R-23AM / R-22AM

The control panel consists of circuits including semiconductors such as LSI etc. Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into three units, Control Unit, Switch Unit and Encoder Unit troubleshooting by unit replacement is described according to the symptoms indicated.

1. Switch Unit Note : Check the lead wire harness connections among big and small switch units and control unit before replacement.

The following symptoms indicate a defective switch unit. Replace the switch unit. a) When touching the buttons, a certain button produces no signal at all. b) When touching the buttons, sometimes a button produces no signal.

2. Encoder Note : Check the lead wire connection between encoder and control unit before replacement.

The following symptoms indicate a defective encoder. Replace the encoder. a) When rotating the encoder, the cooking time can not be entered.

3. Control Unit

The following symptoms may indicate a defective control unit. Replacing the control unit. Before replacing the control unit, perform the switch unit test (Procedure P) to determine if control unit is faulty.

3-1 Programming problems.

a) When touching the buttons, a certain group of buttons do not produce a signal.

3-2 Display problems.

3-3 Other possible problems caused by defective control unit.

a) Buzzer does not sound or continues to sound. b) Cooking is not possible.

R-22AM R-23AM R-23AT

P KEY UNIT TEST FOR R-23AT

CARRY OUT 3D CHECKS. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable is making good contact, verify that the door sensing switch (stop switch ) operates properly; that is the contacts are closed when the door is closed and open when the door is open. If the door sensing switch (stop switch ) is good, disconnect the flat ribbon cable that connects the key unit to the control unit and make sure the door sensing switch is closed (either close the door or short the stop switch connector ). Use the key unit matrix indicated on the control panel schematic and place a jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control unit responds by clearing with a beep, the key unit is faulty and must be replaced. If the control unit does not respond, it is faulty and must be replaced. If a specific pad does not respond, the above method may be used (after clearing the control unit ) to determine if the control unit or key pad is at fault.

R-22AM R-23AM R-23AT

TEST PROCEDURES

PROCEDURE

LETTER COMPONENT TEST

G 8

G 9

G 10

G 11

G 12

G 7 G 6 G 5 G 4 G 3 G 2 G 1

CARRY OUT 4R CHECKS.

SWITCH UNIT TEST FOR R-23AM / R-22AM

1. CARRY OUT 3D CHECKS.

2. Remove the switch unit from the control panel, referring to control panel removal.

3. To test the switches (SW1-SW5) on the switch unit, check between the terminals of the connector CN-F as described in the following table by using ohmmeter when the switches are released and depressed.

4. If incorrect readings are obtained, replace the defective switch.

5. CARRY OUT 4R CHECKS.

Q RELAY TEST

CARRY OUT 3D CHECKS. Remove the outer case and check voltage between Pin Nos. 5 and 7 of the connector (A) on the control

unit with an A.C. voltmeter. The meter should indicate 230 volts, if not check control unit circuity. RY1, RY3 and RY4 Relay Test For R-23AT

These relays are operated by D.C. voltage. 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

Switches Terminals Released Depressed

SW1 F1 - F4 O.C. S.C. SW2 F1 - F5 O.C. S.C. SW3 F2 - F4 O.C. S.C. SW4 F2 - F5 O.C. S.C. SW5 F3 - F4 O.C. S.C.

diode is good, control unit is defective.

RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS

RY1 APPROX. 19.0V D.C. Oven lamp, Blower motor and Stirrer motors RY3 APPROX. 16.0V D.C. High voltage transformer 1 RY4 APPROX. 18.0V D.C. High voltage transformer 2

RY1, RY2 and RY3 Relay Test For R-23AM / R-22AM These relays are operated by D.C. voltage. 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.

TEST PROCEDURES

PROCEDURE

LETTER COMPONENT TEST

RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS

RY1 APPROX. 18.0V D.C. Oven lamp, Blower motor and Stirrer motors RY2 APPROX. 17.5V D.C. RY3 APPROX. 17.5V D.C.

High voltage transformer 1 High voltage transformer 2

CARRY OUT 4R CHECKS.

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

BOARD(PWB) IS OPEN

To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide given below for repair.

Problem: POWER ON, indicator does not light up. CARRY OUT 3D CHECKS.

R-22AM R-23AM R-23AT

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 J24 and solder for R-23AT.

*Insert jumper wire J9 and solder for R-23AM / R-22AM. (CARRY OUT

4 Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".

(CARRY OUT 3D CHECKS BEFORE REPAIR)

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.

D81

RY1

(J23)

VRS1

(VRS2)

(J29)

(9)9(7)5(3)3(1)

OL, BM POWER

7531

CN–A

(J8)

(J9)

(J24)

VRS1

D21

D23

–

C31

R-23AT R-23AM / R-22AM

R-22AM R-23AM R-23AT

TOUCH CONTROL PANEL ASSEMBLY FOR R-23AT

OUTLINE OF TOUCH CONTROL PANEL

The touch control section consists of the following units as shown in the touch control panel circuit.

(1)Control Unit (2)Key Unit

The principal functions of these units and the signals communicated among them are explained below.

AC voltage which is determined by R61/R62. This AC voltage is then half wave rectified by D61/

D62 and smoothed (filtered) by C61/C62. This AC voltage is the input to the IN3 and IN5 ports of IC1, which determines if there is a magnetron / high voltage problem.

HIGH VOLTAGE TRANSFORMER

1. Control Unit

Signal of key touch and oven function control are all processed by one microcomputer.

1) Power Supply Circuit

This circuit changes output voltage at the secondary side of the low voltage (T1) transformer to voltages required at each part by full wave rectifying circuit, constant voltage circuit, etc..

2) ACL Circuit

This is an Auto-clear Circuit, i.e., a reset circuit, which enables IC1 to be activated from initial state.

3) Power Synchronizing Signal Generating Circuit

This is a circuit for generating power synchronizing signal by virtue of the secondary side output of transformer T1. This signal is used for a basic frequency to time processing and so on.

4) Clock Circuit

This is a circuit for controlling clock frequency required for operating IC1.

5) IC1 (Main Processor)

This is a one-chip microcomputer, responsible for controlling the entire control unit.

6) IC2 (Memory Processor)

This is a memory IC, responsible for memory function.

7) Display Circuit

This is a circuit for driving display tubes by IC1 output.

8) Key Input Circuit

This is a circuit for transmitting key input information to IC1.

9) Sound-body Driving Circuit

This is a circuit for driving sound body by IC1 output.

10) Relay Driving Circuit

This is a circuit for driving output relay by IC1 output.

11) Stop Switch Circuit

This is a circuit for driving IC1 to detect door opening/ closing.

12) Exhaust Air Temperature Detecting Circuit

This is a circuit for transmitting output change of thermistor (Oven thermistor (1)) to IC1.

13) High Voltage Monitoring Circuit.

This circuit detects problems in the magnetron / high voltage circuit by sensing a variation in the current flowing through the primary winding of the high voltage transformer. During heating, the primary current of the high voltage transformers also flows through the primary winding of the current transformers CT1 and CT2. This causes a current to be induced in the secondary windings of CT1/CT2 and results in an

HIGH VOLTAGE CIRCUIT MAIN BODY SIDE

D63 or D64

T/C SIDE

C61 or C62

IC1 IN3 or IN5 PORT

CT1 or CT2

R61 or R62

D61 or D62

RY3 or RY4

R65 or R66

R63 or R64

Figure T-1. High Voltage Monitoring Circuit For R-23AT

14) Magnetron Temperature Circuit.

(Detect Noload or Fan Lock)

This is a circuit for transmitting output change of

thermistor (Magnetron thermistor) to IC1.

15) Oven Cavity Temperature Detecting Circuit.

This is a circuit for transmitting output change of

thermistor (Oven thermistor (2)) to IC1.

2. Key Unit

The key unit is composed of a matrix circuit in which when a key it touched, one of signals P11, P12, P15, P16 and P17 generated by the LSI, is passed through the key and returned to the LSI as one of signals R0-

-R3. This model has 20 Memory pads. When the oven is shipped, Memory pad 1 to 10 are set as follows: fig.1.

Memory No. Cook Time Output Power

1 5 sec. 100% 2 10 sec. 100% 3 20 sec. 100% 4 30 sec. 100% 5 40 sec. 100% 6 50 sec. 100% 7 1 min. 100% 8 1 min.15 sec. 100% 9 1 min.30 sec. 100%

10 2 mins. 100%

(fig. 1)

This model has a double quantity pad. When the oven is shipped, Magnification "1.8" is preset in the double quantity pad. This model has an defrost pad. When the oven is shipped, defrost is set as follows: fig.2.

1STAGE 2STAGE 3STAGE POWER 50% 30% 20% DEFROSTING TIME 0.2T+20sec. 0.13T+30sec. 0.67T-50sec.

(fig. 2) NOTE : "CHECK" indicator will flash at half of defrosting time.

CONTROL PANEL ASSEMBLY FOR R-23AM / R-22AM

OUTLINE OF CONTROL PANEL

The control section consists of the following units as shown in the control panel circuit.

(1)Control Unit (2)Switch Unit (3)Encoder Unit

The principal functions of these units and the signals communicated among them are explained below.

1. Control Unit

Signal of switch touch and oven function control are all processed by one microcomputer.

1) Power Supply Circuit

This circuit changes output voltage at the secondary side of the low voltage (T1) transformer to volatges required at each part by full wave rectifying circuit, constant voltage circuit, etc..

2) ACL Circuit

This is an Auto-clear Circuit, i.e., a reset circuit, which enables IC1 to be activated from initial state.

3) Power Synchronizing Signal Generating Circuit

This is a circuit for generating power synchronizing signal by virtue of the secondary side output of transformer T1. This signal is used for a basic frequency to time processing and so on.

4) Clock Circuit

This is a circuit for controlling clock frequency required for operating IC1.

5) IC1 (Main Processor)

This is a one-chip microcomputer, responsible for controlling the entire control unit.

6) Display Circuit

This is a circuit for driving display tubes by IC1 output.

7) Switch Input Circuit

This is a circuit for transmitting switch input information to IC1.

8) Sound-body Driving Circuit

This is a circuit for driving sound body by IC1 output.

9) Relay Driving Circuit

This is a circuit for driving output relay by IC1 output.

10) Stop Switch Circuit

This is a circuit for driving IC1 to detect door opening/ closing.

11) Exhaust Air Temperature Detecting Circuit

This is a circuit for transmitting output change of thermistor (Oven thermistor (1)) to IC1.

12) High Voltage Monitoring Circuit.

R-22AM R-23AM R-23AT

This AC voltage is then half wave rectified by D30/D31 and smoothed (filtered) by C30/C31. This AC voltage is the input to the AN3 and AN4 ports of IC1, which determines if there is a magnetron / high voltage problem.

HIGH VOLTAGE TRANSFORMER

HIGH VOLTAGE CIRCUIT MAIN BODY SIDE

D32 or D33

T/C SIDE

C30 or C31

IC1 AN3 or AN4 PORT

CT1 or CT2

R30 or R31

D30 or D31

RY2 or RY3

R34 or R35

R32 or R33

Figure T-1. High Voltage Monitoring Circuit For R-23AM / R-22AM

13) Magnetron Temperature Detecting Circuit.

This is a circuit for transmitting output change of thermistor (Magnetron thermistor) to IC1.

14) Oven Cavity Temperature Detecting Circuit.

This is a circuit for transmitting output change of thermistor (Oven thermistor (2)) to IC1.

2. Switch Unit

The switch unit is composed of a matrix circuit in which when a switch it touched, one of signals P43 - P45 generated by the LSI, is passed through the switch and returned to the LSI as one of signals P50 - P51.

3. Encoder

The encoder converts the signal generated by LSI into the pulse signal, and the pulse signal is returned to the LSI.

R-22AM R-23AM R-23AT

DESCRIPTION OF LSI FOR R-23AT

LSI(IZA646DR)

The I/O signal of the LSI(IZA646DR) is detailed in the following table.

Pin No. Signal I/O Description

1 VREF IN Reference voltage input terminal.

A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)

2 IN7 IN Temperature measurement input: MAGNETRON THERMISTOR AND OVEN

THERMISTOR (2).

By inputting DC voltage corresponding to the temperature detected by the thermistor, this input is converted into temperature by the A/D converter built into the LSI.

3 IN6 IN Temperature measurement input: OVEN THERMISTOR (1).

By inputting DC voltage corresponding to the temperature detected by the thermis-

tor, this input is converted into temperature by the A/D converter built into the LSI. 4 IN5 IN A/D input for troubleshooting Magnetron 1. 5 IN4 IN Terminal to change functions according to the model.

Signal in accordance with the model in operation is applied to set up its function. 6 IN3 IN A/D input for troubleshooting Magnetron 2. 7 IN2 IN Connected to GND.(0V) 8 IN1 IN Terminal not used. 9 IN0 IN Connected to VC. 10 P47 OUT Terminal not used. 11 P46 OUT Memory (EEPROM) clock output. 12 P45 IN/OUT Memory (EEPROM) data input/output. 13-14 P44-P43 OUT Magnetron high-voltage circuit driving signal.

To turn on and off the cook relay. In 100% power level operation, "L" level during

cooking; "H" level otherwise. In other power level operation (90, 80, 70, 60, 50, 40,

30, 20, 10 or 0%), "H" and "L" level is repeated according to power level.

Power level ON OFF Power level ON OFF

100% 48sec. 0sec. 40% 22sec. 26sec. 90% 44sec. 4sec. 30% 16sec. 32sec. 80% 40sec. 8sec. 20% 12sec. 36sec. 70% 36sec. 12sec. 10% 8sec. 40sec. 60% 32sec. 16sec. 0% 0sec. 48sec. 50% 26sec. 22sec.

OFF

48 sec.

GND

-5V

15 P42 OUT Power supply output at thermistor detecting circuit.

(Output -5V in cooking only, but apply high impedance to others to prevent thermistor

from electrolytic corrosion occurrence.) 16 P41 OUT Terminal not used. 17 P40 OUT Oven lamp, Blower motor and Stirrer motors driving signal. (Square Waveform

: 50Hz)

To turn on and off the shut-off relay (RY1).

During cooking

The Square waveform voltage is delivered

to the RY1 relay driving circuit and

relays(RY3, RY4, COOK RELAY) control

20 msec

circuit. 18-22 P37-P33 OUT Terminal not used. 23 P32 OUT Signal to sound buzzer.

This signal is to control the

2.5kHz continuous signal.

A: key touch sound.

B: Guidance sound.

C: Completion sound.

1.2 sec B

0.12 sec

1.2 sec

GND

-5V

2.4 sec

200µsec.

Pin No. Signal I/O Description

24 P31 IN Signal synchronized with commercial power source frequency.

This is basic timing for all time processing of LSI.

R-22AM R-23AM R-23AT

H : GND

20 msec

25 P30 OUT Terminal not used. 26 CNVSS IN Connected to Vc.(-5V) 27 RESET IN Auto clear terminal.

Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set to "L" level the moment power is supplied, at this time the LSI is reset. Thereafter set at "H" level.

28 XIN IN Internal clock oscillation frequency setting input.

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

29 XOUT OUT Internal clock oscillation frequency control output.

Output to control oscillation input of XIN.

30/31

XCIN/XCOUT

IN/OUT Terminal not used.

32 VSS IN Power source voltage: -5V.

VC voltage of power source circuit input. 33 ø OUT Terminal not used. 34 R3 IN Signal coming from touch key.

When either one of G-12 line keys on key matrix is touched, a corresponding signal

out of P11, P12, P14 - P17 will be input into R3. When no key is touched, the signal

is held at "L" level. 35 R2 IN Signal similar to R3.

When either one of G-11 line keys on key matrix is touched, a corresponding signal

will be input into R2. 36 R1 IN Signal similar to R3.

When either one of G-10 line keys on key matrix is touched, a corresponding signal

will be input into R1. 37 R0 IN Signal similar to R3.

When either one of G-9 line keys on key matrix is touched, a corresponding signal

will be input into R0. 38 VP IN Anode (segment) of Fluorescent Display light-up voltage: -31V.

Vp voltage of power source circuit input. 39 P17 OUT Segment data signal.

The relation between signals and indicators are as follows:

Signal Segment Signal Segment

P24...................... i P13 .........................f

P23................... j,k P12 ........................e

P17.................. LB P11 ........................d

P16..................UB P10 ........................c

ß(50Hz)

P15.....................h P07 ........................b

P14.....................g P06 ........................a

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to R0 - R3 terminal while

one of G-6 line keys on key matrix is touched. 40 P16 OUT Segment data signal. Signal similar to P17.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to R0 - R3 terminal while

one of G-5 line keys on key matrix is touched. 41 P15 OUT Segment data signal. Signal similar to P17.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to R0 - R3 terminal while

one of G-4 line keys on key matrix is touched.

L (-5V)

GND

-31(V)

R-22AM R-23AM R-23AT

Pin No. Signal I/O Description

42-43 P14-P13 OUT Segment data signal.

Signal similar to P17.

44 P12 OUT Segment data signal.

Signal similar to P17.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to R0 - R3 terminal while one of G-8 line keys on key matrix is touched.

45 P11 OUT Segment data signal.

Signal similar to P17.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to R0 - R3 terminal while one of G-7 line keys on key matrix is touched.

46 P10 OUT Segment data signal.

Signal similar to P17.

47-48 P07-P06 OUT Segment data signal.

Signal similar to P17.

49 P05 OUT Digit selection signal.

The relation between digit signal and digit are as follows: Digit signal Digit

P05.................... 1st.

P04................... 2nd.

P03.................... 3rd.

P02.................... 4th.

P01.................... 5th.

P00.................... 6th.

ß(50Hz)

P05

P04

P03

P02

GND

-31(V)

Normally, one pulse is output in every ß period, and input to the grid of the Fluorescent Display.

P01

P00

GND

-31(V)

50-54 P04-P00 OUT Digit selection signal.

Signal similar to P16. 55-57 P27-P25 OUT Terminal not used. 58-59 P24-P23 OUT Segment data signal.

Signal similar to P17. 60 P22 OUT (Sound) Voltage level control terminal.

This terminal (P22) is to control volume level of buzzer sound with terminals P21.

Since the volume level of buzzer sound depends on voltage energized, it is control

level in 3 steps by combining signal levels for P22, P21. Relationship of signal level

combination to sound volume level is shown in the following table, 1~3 in the table,

however, are indicated in the descending order from the maximum level of sound

volume through the minimum level.

Sound Volume P21 P22

1, (Max.) L L 2, H L

A : 1,(Max) 20V

2, 13V 3,(Min) 7V

3, (Min.) L H

*At Output terminal P32, rectangular wave signal of 2.5kHz is output. 61 P21 OUT Sound level control signal.

Refer to above signal P22. 62 P20 IN Input signal which communicates the door open/close information to LSI.

Door closed; "H" level signal(0V).

Door opened; "L" level signal(-31.0V). 63/64 AVCC/VCC IN Connected to GND.

DESCRIPTION OF LSI FOR R-23AM / R-22AM

LSI(IZA648DR)

The I/O signal of the LSI(IZA648DR) is detailed in the following table.

Pin No. Signal I/O Description

1 VCC IN Connected to GND. 2 VEE IN Anode (segment) of Fluorescent Display light-up voltage: -35V.

Vp voltage of power source circuit input.

3 AVSS IN Reference voltage input terminal.

A reference voltage applied to the A/D converter in the LSI. Connected to DC. (-5V)

4 VREF IN Reference voltage input terminal.

A reference voltage applied to the A/D converter in the LSI. Connected to GND. 5-6 AN7-AN6 IN Terminal to switch the specification. 7 AN5 IN Connected to GND. 8 AN4 IN A/D input for troubleshooting Magnetron 1. 9 AN3 IN A/D input for troubleshooting Magnetron 2. 10 AN2 IN Temperature measurement input: OVEN THERMISTOR (1).

By inputting DC voltage corresponding to the temperature detected by the thermis-

tor, this input is converted into temperature by the A/D converter built into the LSI. 11 AN1 IN Temperature measurement input: MAGNETRON THERMISTOR AND OVEN

THERMISTOR (2).

By inputting DC voltage corresponding to the temperature detected by the thermis-

tor, this input is converted into temperature by the A/D converter built into the LSI. 12 P60 IN Input signal which communicates the door open/close information to LSI.

Door closed; "H" level signal (0V).

Door opened; "L" level signal (-5.0V). 13 P55 OUT Power supply output at thermistor detecting circuit.

(Output -5V in cooking only, but apply high impedance to others to prevent thermistor

from electrolytic corrosion ocurrence.) 14-16 P54-P52 OUT Terminal not used. 17 P51 IN Signal coming from switch unit.

When either one of switches SW2 and SW4 on the switch unit is pressed, a

corresponding signal out of P44 and P43 will be input into P51. 18 P50 IN Signal similar to P51.

When either one of switches SW1, SW3 and SW5 on the switch unit is pressed, a

corresponding signal out of P43, P44 and P45 will be input into P50.

1.2 sec B

0.12 sec

1.2 sec

19 P47 OUT Signal to sound buzzer.

This signal is to control the 2.5kHz

continuous signal.

A: Switch touch sound.

B: Completion sound. 20 P46 OUT Terminal not used. 21 P45 OUT Switch strobe signal.

Signal is applied to the switch unit. A pulse signal is input to P50 terminal while switch

SW5 is pressed. 22 P44 OUT Switch strobe signal.

Signal is applied to the switch unit. A pulse signal is input to P50 or P51 terminal while

switch SW3 or SW4 is pressed. 23 P43 OUT Switch strobe signal.

Signal is applied to the switch unit. A pulse signal is input to P50 or P51 terminal while

switch SW1 or SW2 is pressed. 24 P42 IN Signal coming from encoder.

When the encoder is turned, the contacts of encoder make pulse signals. And pulse

signals are input into P42. 25 INT1 IN Signal coming from encoder.

Signal similar to R42. Pulse signals are input into INT1.

GND

-5V

R-22AM R-23AM R-23AT

Pin No. Signal I/O Description

26 INT0 IN Signal synchronized with commercial power source frequency.

This is basic timing for all time processing of LSI.

OFF

GND

32 sec.

-5V

27 RESET IN Auto clear terminal.

Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set to "L" level the moment power is supplied, at this time the LSI is reset. Thereafter

set at "H" level. 28-29 P71-P70 OUT Terminal not used. 30 XIN IN Internal clock oscillation frequency setting input.

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

respect to XOUT terminal. 31 XOUT OUT Internal clock oscillation frequency control output.

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

VC voltage of power source circuit input. 33 P27 OUT Oven lamp, Blower motor and Stirrer motor driving signal (Square Waveform

: 50Hz).

During cooking

To turn on and off the shut-off relay (RY1).

The Square waveform voltage is delivered

to the RY1 relay driving circuit and relays

(RY2, RY3, COOK RELAY) control circuit.

20 msec

34 P26 OUT Terminal not used. 35-36 P25-P24 OUT Magnetron high-voltage circuit driving signal.

To turn on and off the cook relay. In100% power level operation, "L" level during

cooking; "H" level otherwise. In other power level operation (50, 20 or 10%), "H" and

"L" level is repeated according to power level.

OFF

GND

P0WER LEVEL ON OFF

50% 26sec. 22sec. 20% 12sec. 36sec. 10% 8sec. 40sec.

48 sec.

-5V

37-38 P23-P22 OUT Terminal not used. 39-48 P21-P10 OUT Segment data signal.

The relation between signals and indicators are as follows:

Signal Segment Signal Segment

P01............. i P15............ f

P00............. j, k P14 ............ e

P21............. LB P13............ d

P20............. UB P12............ c

P17............. h P11............ b

P16............. g P10............ a

49-54 P07-P02 OUT Digit selection signal.

The relation between digit signal and digit

are as follows:

Digit signal Digit

P07............. 1st.

P06............. 2nd.

P05............. 3rd.

P04............. 4th.

P03............. 5th.

P02............. 6th.

Normally, one pulse is output in every ß period, and input to the grid of the Fluorescent Display.

ß(50Hz)

P07

P06

P05

P04

P03

P02

GND

-31(V)

GND VP

GND

R-22AM R-23AM R-23AT

Pin No. Signal I/O Description

55-56 P01-P00 OUT Segment data signal.

Signal similar to P21.

57-64 P37-P30 OUT Terminal not used.

2-2 Memory IC (IC2) FOR R-23AT

AT24C04 is a 4K-bit, serial memory, enabling CMOS to be erased/written electrically. This memory is constructed with 512 registers x 8bits, enabling individual access, read and write operations to be performed. Details of input/output signal for IC2 are as shown in the following diagram.

TOP VIEW

VSS

VCC

TEST

SCL

SDA

FUNCTIONAL DIAGRAM

(3) Vcc (4) Vss

(5) SDA

(6) SCL

START STOP LOGIC

SLAVE ADDRESS

COMPARATOR

Dout ACK

XDEC

H.V. GENERATION

TIMING

& CONTROL

E PROM

512 x 8

YDEC

DATA REGISTER

Dout

START CYCLE

CONTROL

LOGIC

INC

LOAD

WORD ADDRESS COUNTER

R/W



Figure T-2. Relation between Pin Nos, and Signals

Pin No. Signal I/O Description

1-3 A0-A2 IN Connected to GND.

4 VSS IN Connected to VC(-5V). 5 SDA IN/OUT Serial data input/output : input/outputs data to IC1. 6 SCL IN Clock signal input : input/outputs serial data at every one pulse. 7 TEST IN Connected to VC(-5V). 8 VCC IN Connected to GND.

R-22AM R-23AM R-23AT

SERVICING

1. Precautions for Handling Electronic Components

This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have extremely high impedance at its input and output terminals. For this reason, it is easily influenced by the surrounding high voltage power source, static electricity charge in clothes, etc, and sometimes it is not fully protected by the built-in protection circuit. In order to protect CMOS LSI.

1) When storing and transporting, thoroughly wrap them in aluminium foil. Also wrap all PW boards containing them in aluminium foil.

2) When soldering, ground the technician as shown in the figure and use grounded soldering iron and work table.

approx. 1M ohm

2. Shapes of Electronic Components

Transistor

2SA933ASTP DTA114YSA DTB143ES DTD143ES KRA101M

Transistor 2SB953

Transistor 2SB1238

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 PRESENTS A HAZARD.

Therefore, when checking the performance of the touch control panel, put the outer cabinet on the oven to avoid touching the high voltage transformer, or unplug the primary terminal (connector) of the high voltage transformer to turn it off; the end of such connector must be insulated with an insulating tape. After servicing, be sure to replace the leads to their original locations.

A. On some models, the power supply cord between the

touch control panel and the oven itself is so short that the two can’t be separated. For those models, check and repair all the controls (sensor-related ones included) of the touch control panel while keeping it connected to the oven.

B. On some models, the power supply cord between the

touch control panel and the oven proper is 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 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: DC10MHz 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.

PROCEDURE FOR CHECKING/CLEARING SERVICE COUNTS OF MICROWAVE OVEN FOR R-23AT

The following procedure enables the servicer to obtain the total service counts (cook cycles) for memory cooking, manual, repeat, double quantity cooking and defrost. The maximum capacity of the counter is 999,999 counts, above which the counter will reset to "0". The counter will retain the total counts (will not clear) in the event of a power disruption.

1) Practice for checking total service counts (eg; 234,567 Counts).

--- flashing / ---0.1sec. BUZZER

PAD DISPLAY INDICATOR LED PHONE

(door close) •

• CHECK NUMBER • CHECK CHECK #1 82 68 CHECK

(user total count) #2 VOLUME VOLUME DOUBLE 2 34 56 7 QUANTITY (service total count)

1 NUMBER 1

(after 1 sec.)

(filter used time)

2 NUMBER 2

(after 1 sec.)

2 00

(filter lim. time)

0 (No 10) NUMBER 10

(after 1 sec.)

35 43 2

(service total cook time)

CHECK •

#1: Denotes total service counts within the reach of user,

of which checking and clearing practices are described in this instruction manual.

#2: Denotes the procedure for the servicer to disable

checking/clearing. This procedure is instructed to service personnel only and is excluded from the operation manual.

2) Practice for clearing Service's counts

" " : Flicker / : 0.1 sec BUZZER

PAD ORDER DISPLAY PHONE

(Door close) •

CHECK "NUMBER" • CHECK CHECK 82 68 "CHECK"

(User's Total Counts)

#1 VOLUME 82 68 "CHECK"

VOLUME 82 68 "CHECK"

DOUBLE QUANTITY 2 34 56 7 "CHECK"

(Total Counts Service)

SET 0 "CHECK"

0 0 "CHECK"

SET 0 "CHECK"

CHECK •

R-22AM R-23AM R-23AT

PROCEDURE FOR ENTERING TO IC-2 FOR R-23AT

When the control unit or IC-2 is exchanged, re-enter the constants of DEFROST, the memory information and the EEPROM data, referring to the following procedures. If not so, the oven will not operate correctly.

1) How to enter the contents of DEFROST T = STG1 + STG2 + STG3

Constants STG = A x T + B of STG1 = 0.20 x T + 20 Power level 50% DEFROST STG2 = 0.13 x T + 30 Power level 30%

STG3 = 0.67 x T - 50 Power level 20%

Suppose above constants are entered.

" " : Flicker / : 0.1 sec BUZZER

PAD ORDER DISPLAY PHONE

(Door close) •

SET • SET "NUMBER" •

(within 2 sec.)

#1 START "NUMBER" • DEFROST 1 0.00 DEF

2,0 1 0.20 DEF x 2

(A)

MANUAL/ 1 0 DEF

REPEAT

2 1 20 DEF

#2 (+ - B)

DEF "POWER"

POWER 1 20 100%

SETTING

DEF POWER

5 1 20 50%

MANUAL/ 2 0.00 DEF

REPEAT

1,3 2 0.13 DEF x 2

(A)

MANUAL/ 2 0 DEF

REPEAT

3 2 30 DEF

(+ - B)

DEF "POWER"

POWER 2 30 100%

SETTING

DEF POWER

3 2 30 30%

MANUAL/ 3 0 DEF

REPEAT

#3 5 3 5 DEF "CHECK"

DEF "POWER"

POWER 3 5 100%

SETTING

DEF POWER

2 3 5 20% SET 4 • DEF SET •

#1: No key entry signal. #2: To set-B, touch the POWER SETTING key twice. #3: Ex. "CHECK" will flash and the oven will beep after

50% of DEFROST time has lapsed when 5 key is entered.

#1: Denotes the procedure for the servicer to disable

clearing. This procedure is instructed to service personnel only and is excluded from the operation manual.

R-22AM R-23AM R-23AT

2) How to enter the memory information Example : Suppose cooking time 5 sec. and output power

100% are entered into the memory pad 1.

PAD ORDER DISPLAY PHONE

(Door close) •

SET • SET "NUMBER" •

(within 2 sec.)

1 NUMBER 1 • 0

5 NUMBER 1 • 5 SET "NUMBER" • SET •

Enter the memory information into the memory pads 1 ~ 10 referring to above example. The memory information are given below.

Memory No. Cook Time Output Power

1 5 sec. 100% 2 10 sec. 100% 3 20 sec. 100% 4 30 sec. 100% 5 40 sec. 100% 6 50 sec. 100% 7 1 min. 100% 8 1 min.15 sec. 100% 9 1 min.30 sec. 100%

10 2 mins. 100%

11-20 0 sec.

3) How to enter the EEPROM data Enter the EEPROM data into the memory pads, 3, 4, 6, 8, 9, 11, 12, 13, 14, 15 and 20, referring to following example and the table of EEPROM data.

Example : Suppose the EEPROM data "2235" is entered

into the memory pad 3.

" " : Flicker / : 0.1 sec BUZZER

PAD ORDER DISPLAY PHONE

(Door close) •

CHECK "NUMBER" • CHECK CHECK #2 82 68 "CHECK"

(User's Total Counts)

#1 VOLUME #2 82 68 "CHECK"

VOLUME #2 82 68 "CHECK"

DOUBLE #3 XXXXXX "CHECK"

QUANTITY

(Total Counts of Service)

3 30 30 "CHECK" SET 0 "CHECK"

2,2,3,5 22 35 "CHECK" x 4

SET 22 35 "CHECK"

CHECK •

Table of EEPROM data

Memory Data Contents

Pad

3 2 2 3 5 Higher temperature limit setting of

magnetron thermistor detection 4 0 0 0 0 Constant setting of fan lock detection 6 0 1 0 0 Time setting of fan lock detection 8 3 2 0 0 Higher temperature limit setting of

exhaust air detection 9 0 0 0 0 Constant setting of fan lock detection

11 0 0 0 0 Constant setting of magnetron

thermistor detection

12 0 0 0 0 Constant setting of magnetron

thermistor detection

13 0 0 0 0 Constant setting of magnetron

thermistor detection

14 0 0 0 0 Constant setting of magnetron

thermistor detection

15 1 5 Interval time setting of magnetron

thermistor detection

20 0 0 0 0 Switch level setting of magnetron

thermistor detection

OTHER CHECKING AND CLEARING PROCEDURE FOR R-23AT

1) To check the contents of defrost.

" " : Flicker / : 0.1 sec BUZZER

PAD ORDER DISPLAY PHONE

(Door close) •

CHECK "NUMBER" • CHECK

DEFROST 1 0.20 DEF CHECK

(A)

DEF CHECK

1 20 POWER

(+ - B) 50%

2 0.13 DEF CHECK

(A)

DEF CHECK

2 30 POWER

(+ - B) 30%

DEF CHECK

3 5 POWER

20%

(Repeat)

CHECK •

#1: No key entry signal.

2) How to clear all counter(user and service) and total cooking time and used time of filter.

#1: Denotes the procedure for the servicer to disable

clearing. This procedure is instructed to service personnel only and is excluded from the operation manual.

#2: If IC-2 is exchanged, 0 should be indicated instead of

8268. But if the control unit is exchanged, 0 is not always indicated.

#3: Total counts of service, 6 figures will be displayed.

PAD ORDER DISPLAY PHONE

(Door close) •

SET • SET "NUMBER" •

DOUBLE "NUMBER" • DOUBLE

CHECK "NUMBER" • DOUBLE

VOLUME "NUMBER" • DOUBLE

SET •

R-22AM R-23AM R-23AT

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

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

operating the oven.

1. Disconnect the 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 dam-

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.

age (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;

Do not operate the oven:

1. Without the RF gasket (Magnetron).

2. If the wave guide or oven cavity are not intact.

3. If the door is not closed.

4. If the outer case (cabinet) is not fitted.

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

WARNING FOR WIRING

To prevent an electric shock, take the following precautions.

1. Before wiring,

1) Disconnect the power supply cord.

2) Open the door and block it open.

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

2. Don’t let the wire leads touch to the followiong parts;

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

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

3. Do not catch the wire leads in the outer case cabinet.

4. Insert the positive lock connector until its pin is locked

5. To prevent an error function, connect the wire leads

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) Blower fan blade, Blower fan motor, Switches, Switch levers, Antenna motors and Sirrer antennas.

and make sure that the wire leads do not come off even if the wire leads are pulled.

correctly, referring to the Pictorial Diagram.

OUTER CASE, REAR CABINET AND POWER SUPPLY CORD REMOVAL

To remove the components, procedure as follows.

1. Disconnect oven from power supply.

2. Open the oven door and wedge it open.

3. Remove the screws from the rear and along side the edge of the outer case.

4. Slide the case back about 1 inch (3 cm) to free it from the oven cavity.

5. Lift entire case from the unit.

6. DISCHARGE TWO HIGH VOLTAGE CAPACITORS BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

7. Now, outer case is free.

N.B.; Step 1,2 and 9 form the basis of the 3D checks.

CAUTION:DISCHARGE TWO HIGH VOLTAGE CA-

PACITORS BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

HIGH VOLTAGE TRANSFORMER(S) REMOVAL

1. CARRY OUT 3D CHECKS.

2. Remove the rear cabinet, too.

To remove rear cabinet and power supply cord:

8. Remove the screws holding the rear cabinet to the oven cavity and blower motor.

9. Remove the one (1) screws holding the switch mounting angle to the rear cabinet and release the switch mounting angle from the rear cabinet.

10.Disconnect the power supply cord from the fuse holder.

11.Remove the one (1) screws holding the grounding wire of power supply cord to the oven cavity.

12.Remove the rear cabinet with the power supply cord from the oven cavity.

13.Loosen the tab of the cord bushing, and remove the power supply cord with the cord bushing from the rear cabinet.

14.Remove the cord bushing from the power supply cord,

15.Now, the power supply cord and rear cabinet are free.

3. Disconnect wire lead(s) of high voltage transformer(s) from magnetron(s).

R-22AM R-23AM R-23AT

4. Remove the wire lead(s) of high voltage transformer(s) from the wire holder.

5. Pull out the wire lead(s) of high voltage transformer(s) from the tube.

6. Disconnect wire lead(s) of high voltage transformer(s) from high voltage capacitor(s).

7. Disconnect the high voltage fuse(s) from high voltage transformer(s).

MAGNETRON(S) REMOVAL

8. Disconnect the main wire harness from high voltage transformer(s).

9. Remove two (2) screws holding each power transformer to base plate.

10.Remove the high voltage transformer(s) from base plate.

12.Now, high voltage transformer(s) are free.

Removal

1. CARRY OUT 3D CHECKS.

2. Remove the rear cabinet, too.

3. Remove the two (2) screws holding magnetron exhaust duct to upper and lower waveguide.

4. Remove the magnetron exhaust duct from oven cavity.

5. Disconnect wire leads from magnetron(s ).

6. Disconnect magnetron thermistor from the connector of the stop switch harness.

7. Remove the one (1) screw holding the thermistor angle to the upper magnetron.

8. Remove the four (4) screws holding each magnetron to

MAGNETRON THERMISTOR REPLACEMENT

Removal

1. CARRY OUT 3D CHECKS.

2. Remove the rear cabinet, too.

Remove the upper magnetron from the upper waveguide flange, referring to "MAGNETRON(S) REMOVAL".

4. Now, the upper magnetron with the magnetron thermistor should be free.

5. Remove the thermistor angle from the upper magnetron by pulling out.

6. Straighten the tab of the magnetron thermistor angle holding the magnetron thermistor.

7. Remove the magnetron thermistor from the thermistor angle.

8. Now, the magnetron thermistor is free.

Re-install

1. Install the magnetron thermistor to the thermistor angle as shown in Figure C-1.

Upper magnetron

Upper fin

Thermistor angle

Tab

Magnetron  thermistor

Figure C-1. Magnetron thermistor installation

upper and/or lower waveguide. When removing the screws, hold the magnetron to prevent it from falling.

9. Remove the magnetron(s) from upper and/or lower waveguide with care so magnetron antenna is not hit by any metal object around antenna.

10.Pull out the thermistor angle from the upper magnetron.

11.Now, the magnetron(s) is (are) free.

CAUTION: WHEN REPLACING MAGNETRON, BE

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

2. Hold the magnetron thermistor to the thermistor angle by bending the tab of the thermistor angle.

3. Insert the thermistor angle between the 2nd. fin and 3rd. fin from the upper fin of the upper magnetron and push it until the thermistor angle stops.

NOTE: The magnetron thermistor should be between the

upper fin and the 2nd. fin.

4. Re-install the upper magnetron to the upper waveguide flange with four (4) screws.

5. Re-install the thermistor angle to the upper waveguide flange with one (1) screw.

6. Re-install the magnetron exhaust duct to the upper and lower waveguide flanges with two (2) screws.

7. Route the thermistor harness under the magnetron temperature fuse.

8. Connect the thermistor harness to the stop switch harness.

9. Connect the wire leads to the upper magnetron, referring to the pictorial diagram.

10.Re-install the power supply cord, rear cabinet and outer case cabinet to the oven by reversing the procedures of "OUTER CASE, REAR CABINET AND POWER SUPPLY CORD REMOVAL".

HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE FUSE AND HIGH VOLTAGE RECTIFIER

ASSEMBLY REMOVAL

1. CARRY OUT 3D CHECKS.

2. Remove the rear cabinet, too.

3. Remove two (2) screws holding earth side terminals of high voltage rectifier assembly to the capacitor holder and oven cavity.

Disconnect all wire leads from the high voltage capacitor.

5. Disconnect high voltage fuse(s) from the high voltage transformer(s). Now, high voltage fuse(s) is(are) free.

Remove the three (3) screws holding the blower motor to the top of oven cavity, the chassis support and air duct.

7. Disconnect high voltage wire lead(s) of the high voltage rectifier assembly from the magnetron(s).

Now, the the high voltage rectifier assembly is free.

8. Remove two (2) screws holding the capacitor holder to oven cavity. Now, the capacitors are free.

CAUTION:

1. DISCHARGE THE TWO HIGH VOLTAGE CAPACITORS BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

BLOWER MOTOR AND BLOWER MOTOR TEMPERATURE FUSE REMOVAL

R-22AM R-23AM R-23AT

2. DO NOT REPLACE ONLY THE HIGH VOLTAGE RECTIFIER. IF IT IS DEFECTIVE, REPLACE THE HIGH VOLTAGE RECTIFIER ASSEMBLY.

3. WHEN REPLACING THE HIGH VOLTAGE RECTIFIER ASSEMBLY AND THE HIGH VOLTAGE CAPACITOR, THE CATHODE (EARTH) SIDE TERMINAL OF THE HIGH VOLTAGE RECTIFIER MUST BE SECURED FIRMLY WITH A EARTHING SCREW.

1. CARRY OUT 3D CHECKS.

2. Remove the rear cabinet, too.

3. Disconnect the wire leads from the blower motor and blower motor temperature fuse.

4. Remove the one (1) screw holding the blower motor to the oven cavity.

5. Remove the one (1) screw holding the blower motor to the chassis support.

STIRRER MOTORS (UPPER AND LOWER) REMOVAL

UPPER

1. CARRY OUT 3D CHECKS.

2. Disconnect the wire leads from the stirrer motor (upper).

3. Remove the one (1) screw holding the stirrer motor (upper) to the oven cavity.

4. Turn and lift up the stirrer motor (upper).

5. Now, the stirrer motor (upper) is free.

LOWER

1. Disconnect oven from the power supply.

2. Remove the stirrer motor cover by snipping off the

6. Remove the one (1) screw holding the air duct to the blower motor.

7. Remove the blower motor from the oven cavity.

8. Remove the two (2) screws holding the blower motor temperature fuse to the blower motor.

9. Now, the blower motor and blower motor temperature fuse are free.

material in four portions.

3. Where the portions have been snipped off bend the portions flat. No sharp edge must be evident after removal of the stirrer motor cover.

4. Disconnect the wire leads from the stirrer motor (lower).

5. Remove the one (1) screw holding the stirrer motor (Lower) to the oven cavity.

6. Now, the stirrer motor (lower) is free.

7. After replacement use one (1) screw to fit the stirrer motor cover. (This screw has been fitted to the base plate near the stirrer motor cover beforehand.)

HOW TO RELEASE THE POSITIVE LOCK® CONNECTOR.

Procedure

1. CARRY OUT 3D CHECKS.

2. Pushing the lever of positive lock® connector, pull down the connector from the terminal.

3. Now, the connector is free.

CAUTION: WHEN CONNECTING THE POSITIVE

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

OVEN LAMP AND LAMP SOCKET REMOVAL

1. CARRY OUT 3D CHECKS.

2. Remove the oven lamp.

3. Pull the wire leads from the oven lamp socket by pushing the terminal hole of the oven lamp socket with the small flat type screw driver.

4. Lift up the oven lamp socket .

5. Now, the oven lamp socket is free.

Terminal

Positive lock® connector

Push

Lever

Pull down

Figure C-2. How to release the positive lock connector.

Oven lamp socket

Terminal

Wire lead

Terminal hole

Flat type small screw driver

Figure C-3. Oven lamp socket

R-22AM R-23AM R-23AT

TERMINAL INSULATOR REPLACEMENT

1. Open covers of the terminal insulator by using small flat type screw driver.

2. Remove the receptacle from the terminal insulator.

3. Now, the terminal insulator is free.

Terminal  insulator

Flat type screw driver

CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL

CONTROL PANEL ASSEMBLY REMOVAL

The complete control panel should be removed for replacement of components. To remove the control panel, proceed as follows:

1. CARRY OUT 3D CHECKS.

2. Remove the air intake filter assembly from the base plate.

3. Remove two (2) screws holding the control panel to the base plate.

4. Pull down the control panel and remove it forward.

5. Disconnect two connectors (A), (B), (H) and TAB terminal (TAB1,2,3,4) from the control unit.

6. Now the control panel assembly is free.

CAUTION FOR TOUCH CONTROL PANEL REMOVAL

1) Hold the lower end (Position A, Fig. 1) of the touch control panel assembly firmly while sliding it down and toward you.

DO NOT FORCE THE CONTROL UNIT TO SLIDE DOWN DURING REMOVAL. THIS MAY CAUSE DAMAGE TO THE CONTROL UNIT BY HITTING A RELAY (RY-4 for R-23AT ; RY-3 for R-22AM/23AM) OR THE TAB TERMINALS LOCATED AT THE FRONT OF THE OVEN CAVITY.

2) If the Touch Control Panel is hard to remove;

(1)Insert a flat head screw driver into space B . (Fig. 1) (2)Rotate the screwdriver clockwise while holding posi-

tion C of the Touch Control Panel. (Fig. 2)

TO AVOID DAMAGE TO TOUCH CONTROL PANEL, COVER THE TIP OF SCREWDRIVER WITH TAPE.

(3)If the relay (RY-4 for R-23AT ; RY-3 for R-22AM/23AM)

is hit, re-solder the Relay (RY-4) prior to reinstalling the Touch Control Panel.

Fig. 1

B B

Fig. 2

Installation

1. Insert the receptacle into terminal insulator.

2. Close covers of the terminal insulator, as shown illustlated below.

COVERS

RECEPTACLE

Replacement of individual component is as follows:

for R-22AM/23AM

CONTROL UNIT AND CONTROL PANEL FRAME (WITH SWITCH UNIT)

7. Remove two (2) screws holding the control panel mounting angle to the panel frame.

8. Lift up the control panel mounting angle from the panel frame.

9. Disconnect the connectors (J) and (E) from the control unit.

10.Remove six (6) screws holding the control unit to the panel frame assembly.

11.Push down the right side two (2) hooks fixing the control unit to the panel frame assembly, and lift up the control unit upward.

12.Now, the control unit and control panel frame (with switch unit) are free.

CAUTION: At installing control panel unit assembly to main body set:

1. Ensure the installation of wiring-related parts without negligence.

2. When inserting wire cable to main body set, ensure them free from caught-in trouble. In addition, when installing the control panel assembly to base plate with screws, be sure of pushing the control panel unit upward to fix with screws firmly.

3. Do not allow any wire leads to come near the varistor works, because it will explode and the wire leads near by the varistor will be damaged.

SWITCH UNIT

13.Remove the three (3) screws holding the switch unit (Main) to the control panel frame.

14.Remove the two (2) screws holding the switch unit (Sub.) to the control panel frame.

15.Now, the switch unit is free

TOUCH CONTROL PANEL

SCREW DRIVER

ROTARY ENCODER

13.Remove the one (1) screw holding the earth wire to

the rotary encoder.

14.Remove the two (2) screws and one (1) washer

holding the rotary encoder to the control panel frame.

15.Remove the knob from the rotary encoder shaft.

16.Now, the rotary encoder is free.

for R-23AT

CONTROL UNIT AND CONTROL PANEL FRAME (WITH KEY)

7. Remove three (3) screws holding the control panel mounting angle to the panel frame.

8. Lift up the control panel mounting angle from the panel frame.

9. Disconnect connector (G) from the control unit by pushing the hooks of cable holder inwardly.

10.Remove six (6) screws holding the control unit to the panel frame assembly.

11.Push down the right side two (2) hooks fixing the control unit to the panel frame assembly, and lift up the control unit upward.

12.Now, the control unit and control panel frame (with key) are free.

CAUTION: At installing control panel unit assembly to main body set:

1. Ensure the installation of wiring-related parts without negligence.

R-22AM R-23AM R-23AT

2. When inserting key cable to main body set, ensure them free from caught-in trouble. In addition, when installing the control panel assembly to base plate with screws, be sure of pushing the control panel unit upward to fix with screws firmly.

3. Do not allow any wire leads to come near the varistor works, because it will explode and the wire leads near by the varistor will be damaged.

NOTE: 1. Before attaching a new key unit, remove

remaining adhesive on the control panel frame surfaces completely with a soft cloth soaked in alcohol.

2. When attaching the key unit to the control panel frame, adjust the upper edge and right edge of the key unit to the correct position of control panel frame.

3. Stick the key unit firmly to the control panel frame by rubbing with soft cloth to prevent scratching.

POWER SUPPLY CORD REPLACEMENT

1. CARRY OUT 3D CHECKS

2. Release the cord bushing from the rear cabinet.

3. Disconnect the brown and blue wires of the power supply cord from the noise filter.

4. Remove the single (1) screw holding the earth wire of power supply cord.

5. Remove the power supply cord.

Re-install

1. Insert the power supply cord into the cord bushing.

2. Connect the brown and blue wires of power supply cord into the terminals of noise filter, referring to pictorial diagram.

3. Install the green/yellow wire of power supply cord with the one (1) screw.

4. Re-install the cord bushing to the rear cabinet.

5. CARRY OUT 4R CHECKS.

Power supply cord

Cord bushing

Green/Yellow wire

Screw

Chassis support

Brown wire

Blue wire

Noise filter angle Noise filter

Figure C-4. Power supply cord replacement

1ST LATCH, 2ND LATCH, 3RD LATCH, MONITOR, AND STOP SWITCHES REMOVAL

1. CARRY OUT 3D CHECKS.

2. Remove the control panel from the oven cavity referring to “CONTROL PANEL REMOVAL”.

3. Remove the two (2) screws holding the latch hook to the oven cavity.

4. Open the door and pull the latch hook out of the oven cavity.

5. For 3rd. latch, stop or Monitor switch removal 5-1. Disconnect the wire leads from the switch. 5-2. Push the retaining tabs outward slightly and then

pull the switch forwards and remove it from the latch hook.

6. For 1st. latch and 2nd. latch switches removal 6-1. Disconnect the wire leads from the 1st latch and

2nd. latch switches.

6-2. Remove the single (1) screw and nut holding the

1st latch and 2nd. latch switches to the latch hook.

CAUTION: IF THE LATCH HOOK IS NEW, WHEN

THE 1ST LATCH SWITCH AND 2ND. LATCH SWITCH ARE INSTALLED, THE TWO (2) TABS OF THE LATCH HOOK SHOULD BE BROKEN.

Power supply cord

Brown wire

Blue wire

Noise filter

Noise filter angle

1ST, 2ND, 3RD LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT

In case 1st latch switch, 2nd latch, stop switch, 3rd latch switch and monitor switch do not operate properly due to

a mis-adjustment, the following adjustment should be made.

R-22AM

Latch head

SW4: Monitor switch

Latch hook

SW1: 1st. latch switch

SW2: 2nd. latch switch

SW5: Stop switch

SW3: 3rd. latch switch

Latch head

Joint lever

Door release lever

Head lever

R-23AM R-23AT

1. Loosen the two (2) screws holding the latch hook.

2. 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

0.5mm. The vertical position of the latch hook should be placed where the stop switch and 1st, 2nd, 3rd latch switches have activated with the door closed. The horizontal position of the latch hook should be placed where the monitor switch has activated with the door closed.

3. Secure the screws with washers firmly.

4. Make sure of the 1st, 2nd, 3rd latch switches, stop switch, and monitor switch operation. If those switches have not activated with the door closed, loose two (2) screws holding latch hook and adjust the latch hook position.

After adjustment, make sure of the following:

1. In and out play of door remains less than 0.5mm when in the latched position.

2. The stop switch and 1st, 2nd, 3rd latch switches interrupt the circuit before the door open when the door release lever is pulled, and then and monitor switch close the circuit when the door is opened.

3. 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-5 Latch Switch Adjustments

DOOR REPLACEMENT AND ADJUSTMENT

REMOVAL

1. CARRY OUT 3D CHECKS.

2. Remove the two (2) screws holding each of the upper and lower oven hinges to the oven cavity.

3. Remove door assembly with upper and lower oven hinges by pulling it forward.

4. Release upper and lower oven hinges from door assembly.

5. Now, door assembly is free.

NOTE: When individual parts are replaced, refer to "Door

Disassembly".

RE-INSTALL

1. Insert the upper and lower oven hinges into door hinge pins.

2. Insert the upper and lower oven hinges with door assembly into rectangular holes of oven cavity front plate.

3. Make sure that the door is parallel with oven face lines (left and upper side line) and door latch heads pass through the latch holes correctly.

4. Fasten upper and lower oven hinges firmly to oven cavity with two (2) screws on each hinge.

Note: After any service to the door; (A) Make sure that 1st. latch switch, 2nd. latch switch,

3rd. latch switch, stop 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.

DOOR ADJUSTMENT

When removing and/or loosening hinges such as in door replacement, the following adjustment criteria are taken. Door adjustment is performed with the door properly installed and closed and while the oven hinges are loose.

1. Loosen upper and lower oven hinges with phillips head screw driver.

2. Adjust the door by moving it vertically so that the top right hand corner of the door is in line with the top of the control panel frame assembly.

3. Tighten the upper and lower oven hinge screws.

UPPER OVEN HINGE

OUTER CASE CABINET

LOWER

LATCH HEADS

OVEN HINGE

Figure C-6. Door Replacement

After adjustment, make sure of the following:

1. Door latch heads smoothly catch the latch hook through the latch holes, and the latch head goes through the center of the latch hole.

2. Deviation of the door alignment from horizontal line of cavity face plate is to be less than 1.0mm.

3. The door is positioned with its face depressed toward the cavity face plate.

4. Re-install outer case and 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 mois-

DOOR DISASSEMBLY

R-22AM R-23AM R-23AT

ture, 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. If such were the case, your oven could not be equipped with a vent, the very purpose of which is to exhaust the vapor-laden air from the oven cavity.

CHOKE COVER REMOVAL

1. Open the door and insert a putty knife (thickness of about 0.5mm) in gap between the choke cover and corner portion of door panel to free engaging parts. Refer to Fig. C-7.

NOTE: As the choke cover and door panel are engage at

16 places, do not force any perticular part.

2. Remove the choke cover carefully. (If choke cover is broken, replace with a new one.)

DOOR  HANDLE

PUTTY KNIFE

BENT

LATCH HEAD

CHOKE COVER

UPPER  OVEN HINGE

CHOKE COVER

LOWER  OVEN HINGE

PUTTY KNIFE

BENT

DOOR PANEL

FRONT

Figure C-7. Choke cover

DOOR COMPONENTS REMOVAL

UPPER AND LOWER OVEN HINGES REMOVAL

1. Remove the door assembly from oven cavity, referring to "REMOVAL" of "DOOR REPLACEMENT AND ADJUSTMENT".

2. Remove choke cover, referring to "CHOKE COVER REMOVAL".

3. Release the oven hinges from the door panel.

4. Now, the oven hinges are free.

DOOR HANDLE REMOVAL

1. Remove the door assembly from oven cavity, "REMOVAL" of "DOOR REPLACEMENT AND ADJUST-

MENT".

2. Place door assembly on a soft cloth with latches facing up.

3. Remove choke cover from door panel, referring to "CHOKE COVER REMOVAL".

4. Remove two (2) screws holding the door handle to door.

5. Remove the door handle from door panel.

6. Now, door handle is free.

UPPER AND LOWER LATCH HEADS REMOVAL

7. Remove the door release lever from the door assembly.

8. Remove the three (3) screws holding the joint plate to the door panel.

9. Release the latch spring from the tab of the joint lever and joint plate.

10.Release the latch heads from joint lever and joint plate.

11.Now, the latch heads are free.

DOOR CASE REMOVAL

1. Remove the door assembly from oven cavity, referring to "REMOVAL" of "DOOR REPLACEMENT AND ADJUSTMENT".

2. Remove choke cover from door panel, referring to "CHOKE COVER REMOVAL".

3. Remove door handle from door panel, referring to "DOOR HANDLE REMOVAL".

4. Bend up four (4) nails of door case.

5. Remove door case from door panel.

6. Now, the door case is free.

DOOR GLASS REMOVAL

7. Remove the four (4) screws holding two (2) outside window fixing plates to door panel.

8. Now, the door glass is free.

SERVICE INFORMATION

IMPORTANT: When the magnetron MG1 and/or MG2 is replacing, the relays (RY3 and RY4 for R-23AT; RY2 and

RY3 for R-22AM/23AM) on control unit must be replaced at the same time. Because if the magnetron's life has been over, the relay's life may also be over.

R-22AM R-23AM R-23AT

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

SHARP

Microwave leakage measurement at 5 cm distance

TEST DATA AT A GLANCE

Parts Symbol Value / Data Weak point F1 A017 Fuse F2 F6.3A 250V Fuse F3 M8A Fuse F4 M8A Temperature fuse (Mag) TF1 150˚C Temperature fuse (Mag.) TF2 150˚C Temperature fuse(Blower motor) TF3 120˚C Temperature fuse (Oven) TF4 120˚C Magnetron thermistor Approx. 373kΩ at 15˚C, 292KΩ at 20˚C, 231KΩ at 25˚C Oven thermistor (1) Approx. 373kΩ at 15˚C, 292KΩ at 20˚C, 231KΩ at 25˚C Oven thermistor (2) Approx. 16kΩ at 15˚C, 13KΩ at 20˚C, 11KΩ at 25˚C Monitor resistor R1 4.3Ω 20W Oven lamp OL 250V 25W High voltage capacitor C1 0.94µF AC 2300V High voltage capacitor C2 0.94µF AC 2300V High voltage transformer T1, T2 Filament winding < 1Ω (for R-22AM) Secondary winding Approx. 75Ω

Primary winding Approx. 1.8Ω High voltage transformer T1, T2 Filament winding < 1Ω (for R-23AM/ 23AT) Secondary winding Approx. 75Ω

Primary winding Approx. 1.2Ω Magnetron MG1 Filament winding < 1Ω

Filament winding - chassis ∞ Ω Magnetron MG2 Filament winding < 1Ω

Filament winding - chassis ∞ Ω

R-22AM R-23AM R-23AT

WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.

NOTE: CONDITION OF OVEN

1. POWER SUPPLY CONNECTED AND/OR 1MINUTE AFTER DOOR CLOSED OR COOK OFF.

2. : APPEAR ON DISPLAY.

BRN

230V~50Hz

BLU

NEUTRAL LIVE

SCHEMATIC

NOISE FILTER

NOISE SUPPRESSION COIL

F1 : WEAK POINT A017

EARTH

GRN/YLW

DISCHARGE RESISTOR 680 kΩ 1/2W

BLK

10000 pF/ AC250V

LINE CROSS CAPACITOR 

DISCHARGE RESISTOR 10 MΩ 1/2W

LINE CROSS CAPACITOR 0.22µF/ AC250V

10000 pF/ AC250V

LINE CROSS CAPACITOR 

WHT

NOTE: Indicates components with potential above 250 V.

SW2: 2ND LATCH SWITCH

F2:

FUSE

F6.3A

TF3:BLOWER MORTOR

TF4:OVEN TEMP. 

 FUSE 120C °

BLOWER MOTOR

 TEMP. FUSE 120C °

UPPER

STIRRER MOTOR

R1:

MONITOR

RESISTOR

4.3Ω/20W

SW4:

MONITOR

SWITCH

SW1:  1ST LATCH SWITCH (PRIMARY INTERLOCK SWITCH)

F4: FUSE M8A

F3: FUSE M8A

CONTROL UNIT

LOWER

TAB1

TAB3

RY1

OVEN LAMP

STIRRER MOTOR

TF1: MAGNETRON (MG1)  TEMP. FUSE 150 °C

TAB4

RY2 (R-22AM/23AM)

RY3 (R-23AT)

SW5:  STOP  SWITCH

SW3:  3RD LATCH SWITCH

TF2:  MAGNETRON (MG2) TEMP. FUSE 150°C

TAB2

OVEN 

THERMISTER (2)

RY4 (R-23AT)

RY3 (R-22AM/23AM)

OVEN 

THERMISTER (1)

C1:H.V. CAPACITOR

T1: HIGH VOLTAGE

MAGNETRON THERMISTER

T2: HIGH VOLTAGE

 0.94 µF/ AC2300V

TRANSFORMER

F5: H.V.FUSE

0.6 A/ 5 kV (R-22AM)

0.75 A/ 5 kV 

C2:H.V. CAPACITOR  0.94 µF/ AC2300V

TRANSFORMER

F6: H.V.FUSE

0.6 A/ 5 kV (R-22AM)

0.75 A/ 5 kV 



RR-23AM



RR-23AM

23AT



MG1: MAGNETRON

H. V. RECTIFIER

MG2: MAGNETRON

H. V. RECTIFIER

Figure O-1 Oven Schematic-OFF Condition

R-22AM R-23AM R-23AT

NOTE: CONDITION OF OVEN

1. FOR 1MINUTE AFTER DOOR CLOSED.

2. : APPEAR ON DISPLAY.

SCHEMATIC

NOTE: Indicates components with potential above 250 V.

BRN

230V~50Hz

EARTH

BLU

GRN/YLW

NEUTRAL LIVE

NOISE FILTER

DISCHARGE RESISTOR 680 kΩ 1/2W

NOISE SUPPRESSION COIL

F1 : WEAK POINT A017

Figure O-2 Oven Schematic-IDLE Condition (Door opened condition)

DISCHARGE RESISTOR 10 MΩ 1/2W

LINE CROSS CAPACITOR 0.22µF/ AC250V

BLK

SW2: 2ND LATCH SWITCH

F2:

FUSE

10000 pF/ AC250V

LINE CROSS CAPACITOR 

10000 pF/ AC250V

LINE CROSS CAPACITOR 

R1:

MONITOR

RESISTOR

SW4:

WHT

SW1:  1ST LATCH SWITCH (PRIMARY INTERLOCK SWITCH)

F6.3A

4.3Ω/20W

MONITOR

SWITCH

TF3:BLOWER MORTOR

TF4:OVEN TEMP. 

 FUSE 120C °

BLOWER MOTOR

F4: FUSE M8A

F3: FUSE M8A

CONTROL

 TEMP. FUSE 120C °

UNIT

UPPER

STIRRER MOTOR

LOWER

TAB1

TAB3

RY1

OVEN LAMP

STIRRER MOTOR

TF1: MAGNETRON (MG1)  TEMP. FUSE 150 °C

TAB2

TAB4

RY2 (R-22AM/23AM)

RY3 (R-23AT)

SW5:  STOP  SWITCH

SW3:  3RD LATCH SWITCH

TF2:  MAGNETRON (MG2) TEMP. FUSE 150°C

OVEN 

THERMISTER (2)

RY4 (R-23AT)

RY3 (R-22AM/23AM)

OVEN 

THERMISTER (1)

C1:H.V. CAPACITOR

T1: HIGH VOLTAGE

MAGNETRON THERMISTER

T2: HIGH VOLTAGE

 0.94 µF/ AC2300V

TRANSFORMER

F5: H.V.FUSE

0.6 A/ 5 kV (R-22AM)

0.75 A/ 5 kV 

C2:H.V. CAPACITOR  0.94 µF/ AC2300V

TRANSFORMER

F6: H.V.FUSE

0.6 A/ 5 kV (R-22AM)

0.75 A/ 5 kV 



RR-23AM



RR-23AM

23AT



MG1: MAGNETRON

H. V. RECTIFIER

MG2: MAGNETRON

H. V. RECTIFIER

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. MANUAL/ REPEAT KEY TOUCHED [R-23AT].

3. COOKING TIME PROGREMMED.

4. START PAD TOUCHED.

SCHEMATIC

NOISE FILTER

10000 pF/ AC250V

LINE CROSS CAPACITOR 

BRN

230V~50Hz

EARTH

BLU

GRN/YLW

NEUTRAL LIVE

NOISE SUPPRESSION COIL

F1 : WEAK POINT A017

DISCHARGE RESISTOR 680 kΩ 1/2W

DISCHARGE RESISTOR 10 MΩ 1/2W

LINE CROSS CAPACITOR 0.22µF/ AC250V

10000 pF/ AC250V

LINE CROSS CAPACITOR 

BLK

SW2: 2ND LATCH SWITCH

F2:

FUSE

F6.3A

R1:

MONITOR

RESISTOR

4.3Ω/20W

SW4:

MONITOR

SWITCH

WHT

SW1:  1ST LATCH SWITCH (PRIMARY INTERLOCK SWITCH)

TF3:BLOWER MORTOR

TF4:OVEN TEMP. 

 FUSE 120C °

BLOWER MOTOR

F4: FUSE M8A

F3: FUSE M8A

CONTROL

 TEMP. FUSE 120C °

UNIT

UPPER

STIRRER MOTOR

LOWER

TAB1

TAB3

RY1

OVEN LAMP

STIRRER MOTOR

TF1: MAGNETRON (MG1)  TEMP. FUSE 150 °C

TAB2

TAB4

RY2 (R-22AM/23AM)

RY3 (R-23AT)

SW5:  STOP  SWITCH

SW3:  3RD LATCH SWITCH

TF2:  MAGNETRON (MG2) TEMP. FUSE 150°C

OVEN 

THERMISTER (2)

RY4 (R-23AT)

RY3 (R-22AM/23AM)

OVEN 

THERMISTER (1)

C1:H.V. CAPACITOR

T1: HIGH VOLTAGE

MAGNETRON THERMISTER

T2: HIGH VOLTAGE

 0.94 µF/ AC2300V

TRANSFORMER

F5: H.V.FUSE

0.6 A/ 5 kV (R-22AM)

0.75 A/ 5 kV 

C2:H.V. CAPACITOR  0.94 µF/ AC2300V

TRANSFORMER

F6: H.V.FUSE

0.6 A/ 5 kV (R-22AM)

0.75 A/ 5 kV 



RR-23AM



RR-23AM

23AT



MG1: MAGNETRON

H. V. RECTIFIER

MG2: MAGNETRON

H. V. RECTIFIER

Figure O-3 Oven Schematic-Cooking Condition

R-22AM R-23AM R-23AT

BLU

NOISE FILTER

BRN

WHT

POWER

EARTH

NEUTRAL

LIVE

SUPPLY

CORD

G/Y

A017 F1:

BLK

WHT

BLK

RED

BLK

GRN

OL : OVEN LAMP

 & SOCKET



YLW

WHT

ORG

TF4:OVEN TEMP. 

 FUSE 120˚C

OVEN

THERMISTOR (1)

PNK

PNKGRY

F2 : 

FUSE 

F6.3A

R1 : MONITOR RESISTOR

BRN

F4 : FUSE M8A (Oven side)

BRN

PNK

ORG

(Cabinet side)

ORG

F3 : FUSE M8A

GRY

SM:

YLW

WHT



(Upper)

MOTOR

STIRRER 

RED

PNK

RED

TF1:MAGNETRON 

 TEMP. FUSE 

WHT

MAGNETRON 

THERMISTOR

MG1 :

C2 : HIGH VOLTAGE

MAGNETRON

(Upper)

CAPACITOR

 150˚C

RED

White case

H. V. RECTIFIER

Black tape

H. V. RECTIFIER

HIGH VOLTAGE COMPONENTS

C1 : HIGH VOLTAGE

CAPACITOR

PNK

(Lower)

MOTOR

STIRRER 

RED

WHT



ORGPNK

Blue

case

F6: H.V. FUSE

T2 :

HIGH VOLTAGE

TRANSFORMER

F5: H.V. FUSE

T1 :

HIGH VOLTAGE

TRANSFORMER

(Cabinet side)

TF3:MAGNETRON 

 TEMP. FUSE 

 120˚C

TF2:MAGNETRON 

 TEMP. FUSE 

 150˚C

MG2 :

MAGNETRON

(Lower)

BLK

H

W

H

W

H

W

RED

BLK

T T

PNK

BM :BLOWER

MOTOR

GRY

PNK

( Door side)

SM:



OVEN THERMISTOR (2)

Figure S-1. Pictrorial Diagram

SW4 :

(R-23AT)

TOUCH CONTROL PANEL

GRY

WHT

MONITOR

SWITCH

CN-D

SW2: 2ND LATCH

COM.

1 RED

3 WHT

CN-H

CN-B

CT1

TAB1

RY-3

TAB2

BLK

PNK

BRN

ORG

 SWITCH

 (Oven side)

COM.

GRY

WHT

COM.

SW1: 1ST LATCH

 SWITCH

 (Cabinet side)

RY-1

CN-B

CN-A

1 GRN

CT2

3 BLK

2 ORG

RY-4

TAB3

TAB4

GRN

TOUCH CONTROL PANEL

GRN

ORG

TAB2

TAB1

CN-E

CN-J

(R-22AM, R23AM)

WHT

COM.

SW3 : 

3RD LATCH

RED

CN-H

SW5 : STOP

SWITCH

1 BLK

CN-A

ORG

GRN

COM.

3 PNK

CN-B

CT1

GRN

5 WHT

RY-2

TAB2

7 RED

TAB1

RY-1

TAB3

BRN

TAB4

CN-A

BLK

CT2

RY-3

TAB3

TAB4

SWITCH

R-22AM R-23AM R-23AT

POWER

aaa

DEF CHECK

FLUORESCENT DISPLAY TUBE

6G 5G 4G 3G 2G 1G

NUMBER

15 1/2W

SP1

R40

DOUBLE FILTER

321

3.3K

ZD1

25V 22µF +

50V

0.1µF C74

CONTROL UNIT

16V

100µF

D5D611ES1

11ES1

D1~D4:11ES1



15G471K

VRS1

(J24)

F

N N

L

B B

U

hgfedcbaijk

1

2

3

4

5

6

N

F

Q41

2SB1238

20K

R41

Q40

KRA101M

15K

2SA933ASTP

HZ4C3

C22

ZD2

15K

47µF, 10V

R20



0.01µF, 25V

560, 1/2W

Q20

KRA101M

3.3µF, 50V

_ C3 HZ12C1

_ C2

1.8K

2SB953

1000µF, 35V

50V

0.01µF

C21

0.1µF, 50V

C30

15K R31

VCC

A0A1A2

TEST

C20

SCL

IC2

SDA

AT24C04

VSS

C80

Q81

0.1µF, 50V

R80

2.2µF, 50V

C81

1µF, 50V

C82

DTD143ES

(J3)36K

(J2)8.2K

Q80

DTA114YSA

470

DOOR

R42 39K

R43 10K

Vcc

P20

P21

P22

P23

P24

P25

P26

IN5

IN4

IN3

IN2

IN1

IN0

47K

R68

R33 10K

R32 2.7K

VREF

AVcc

IN7

IN6

R67

D81

RY1

KEY UNIT

R93~R101: 15K X 9

R93 D93

R94 D94

R95 D95

R96 D96

G 7 G 6 G 5 G 4 G 3 G 2 G 1

R97 D97

G 8

G 9

R0R1R2

P27

P00

P01

P02

P03

P04

P05

P06

P07

P10

P11

P12

IC-1 IZA646DR

P47

P46

P45

P44

P43

P42

P41

P40

P37

P36

P35

P34

P13

P33

P14

P32

P15

P16

P17

P31

P30

CNVSS

Xin

Xcin

Xout

Xcout

RESET

R300

CF1 CST4.00MGW

Vss

1.8K

R50

47K

R79

C200

D64 D63

R71

DOOR

G 10

G 11

G 12

R98

R99

R100

R101



OVEN

THERMISTOR (2)

C72

0.01uF, 25V

H 1 H 3

18K

4.7K R200

6.8K

R201

3.3K R74

33K

1.1K

THERMISTOR (1)

R73

100

30K

R70

OVEN

R72

C71

D71



MAGNETRON THERMISTOR

Figure S-2. Control Panel Circuit (R-23AT)

Q83

R83

DTB143ES

39 1/2W

D83

RY3

CT1

Q84

R84

DTB143ES

39 1/2W

D84

RY4

CT2

0.01µF, 50V

C70

D70

11ES1

25V

22µF

22µF

C62

C61 300K

300K

R65

R66

R64

R63

D61

D62

2.0KF

R61

R62

STOP SWITCH

B 1 B 2 B 3

A 7

AC230V

50HZ

A 5

A 3

OVEN LAMP

BLOWER MOTOR

A 1

STIRRER

MOTOR

TAB1

TAB2

TAB3

TAB4

: IF NOT SPECIFIED, 1/4W ± 5%

: IF NOT SPECIFIED, ISS270A

: IF NOT SPECIFIED, 0.01µF / 16V

HIGH

VOLTAGE

TRANSFORMER 1

HIGH

VOLTAGE

TRANSFORMER 2

R-22AM R-23AM R-23AT

F F

6G 5G 4G 3G 2G 1G

POWER

aa aa

N N L U

1 2 3 4 5 6

N F F

R91 6.8 K

16V

P27

3335404550556064

126

1 1 P C B B

hgfedcba

G G G G G G

ijk

P 2 2

(J2)(J1)

18K C90

(J4)(J3)

R90 4.7 K

P26 P25 P24 P23 P22 P21 P20 P17 P16 P15 P14 P13 P12 P11 P10 P07 P06 P05 P04 P03 P02 P01 P00 P37 P36 P35 P34 P33 P32 P31 P30

32302520151051

IC1 IZA648DR

VSS XOUT XIN P70 P71

RESET

INT0 INT1 P42 P43 P44 P45 P46 P47 P50 P51 P52 P53 P54 P55 P60 AN1 AN2 AN3 AN4 AN5 AN6 AN7 VREF AVSS VEE VCC

R37 47K

R36 47K

15KR85

R63 47K

CF1

CST4.00MGW



15KR84

E 5F 5

I 2

G 2

G 1 I 1

START

SW5

SW.UNIT

F 4 E 4

C80

2200p

E 3F 3

/ 20%

/ 10%

SW3

SW4

C81

16V

2200p

F 2 E 2

/100%

/ 50%

SW1

SW2

E 1F 1

SW.UNIT

4.7K R82

R80

R81

220K

4.7K R83

J 3

J 2

J 1

K 3

K 2

K 1

COM.

ENCODER

50V

C12

R5 15 1/2W

C9

–

0.1µ

22µ 25V

C8

100µ 16V

–

11ES1

D5D6D7

D1–D4 : 11ES1

CONTROL UNIT

A 7

15K R4

(5)

HZ4C3 ZD2

R1 1.8K

VC 15K R10

560 1/2W

Q1

2SB953

3.3K

Q10

KRA101M

2SA933ASTP

R3 1K

47µ 16V

–

0.01µ 25V

3.3µ 50V

–

HZ12C1

ZD1

1000µ 35V

–

0.1µ 50V

10G471K VRS1

(J9)

A 5

C21

C11

4.7µ 35V

Q70

KRA101M

3.3K R70

SP1

100

1.1K R40

D50 R50

C50

110K R41

3.3K R42

D32

D33

1.8K R65

R51 5.1K

+–

C20

0.1µ 50V



Q20

DTA114YSA

0.1µ 50V 470

R20

C10

Q22

+–

DTB143ES

Q23

DTB143ES

D20

C60

11ES1

H 3

0.01µ 25V

H 1

B 1B 2B 3

OVEN

THERMISTOR (2)

MAGNETRON THERMISTOR

STOP

SWITCH

Figure S-3. Control Panel Circuit (R-23AM)

OVEN

THERMISTOR (1)

RY1



A 3

Q21

DTD143ES

D21

TAB2

RY3

R23



39 1/2W

D23



CT2

TAB3



R22

39 1/2W

D22



RY2

CT1

A 1

TAB1

TAB4

–

22µ25V

C30

300K

R34

2.0K R30

R32

D30

–

22µ25V

C31

300K

R35

2.0K R31

R33

D31

: IF NOT SPECIFIED, 1SS270A

: IF NOT SPECIFIED, 1/4W ± 5%

: IF NOT SPECIFIED, 0.01µ / 16V

AC230V

50HZ

OVEN LAMP

BLOWER

MOTOR

STIRRER

MOTOR



HIGH

VOLTAGE

TRANSFORMER 1

HIGH

VOLTAGE

TRANSFORMER 2

R-22AM R-23AM R-23AT

126

POWER

N L

B B

hgfedcba

ijk

aa aa

6G 5G 4G 3G 2G 1G

50V

C12

0.1µ

R5 15 1/2W

C9

22µ 25V

–

C8

100µ 16V

–

11ES1

D5D6D7

ZD1

R3 1K

HZ12C1

18K C90

(J4)(J3)

(J2)(J1)

15K R4

(5)

2SA933ASTP

HZ4C3

15K

ZD2

R10

560 1/2W

Q1

2SB953

R1 1.8K

3.3K

Q10

KRA101M

C21

C11

+–

4.7µ 35V

47µ 16V

–

0.01µ 25V

3.3µ 50V

–

1000µ 35V

–

0.1µ 50V

C10

0.1µ 50V

R90 4.7 K

+–

R91 6.8 K

C20

R20

P27 P26 P25 P24 P23 P22 P21 P20 P17 P16 P15 P14 P13 P12 P11 P10 P07 P06 P05 P04 P03 P02 P01 P00 P37 P36 P35 P34 P33 P32 P31 P30

0.1µ 50V



Q20

DTA114YSA

470

3335404550556064

IC1 IZA648DR

Q22

DTB143ES

VSS

32302520151051

XOUT XIN P70 P71

RESET

INT0 INT1 P42 P43 P44 P45 P46 P47 P50 P51 P52 P53 P54 P55 P60 AN1 AN2 AN3 AN4 AN5 AN6 AN7 VREF AVSS VEE VCC

Q23

DTB143ES

R51 5.1K

16V

R80

SW1

SW2

E 1F 1

SW.UNIT

100

1.1K R40

4.7K R82

220K

J 3

K 3

D50 R50

R36 47K

D32

D33

2.4K R65

R37 47K

15KR85

R63 47K

CF1

CST4.00MGW



15KR84

E 5F 5

I 2

G 2

G 1 I 1

START

SW5

KRA101M

Q70

F 4 E 4

SW.UNIT

3.3K R70

2200p

C80

2200p

C81

E 3F 3

F 2 E 2

/100%

/ 20%

SW3

/ 50%

/ 10%

SW4

SP1

C50

110K R41

3.3K R42

R81

4.7K R83

C60

D20

220K

J 2

K 2

11ES1

COM.

H 3

0.01µ 25V

H 1

B 1B 2B 3

J 1

K 1

ENCODER

OVEN

THERMISTOR (2)

MAGNETRON THERMISTOR

STOP

SWITCH



OVEN

THERMISTOR (1)

D1–D4 : 11ES1

CONTROL UNIT

A 7

10G471K VRS1

AC230V

50HZ

(J9)

A 5

Q21

DTD143ES

D21



RY1

A 3

OVEN LAMP

BLOWER

MOTOR



R22



RY2

A 1

TAB1

STIRRER

MOTOR



39 1/2W

HIGH

R23

D22



RY3

CT1

TAB3

TAB2

VOLTAGE

TRANSFORMER 1



HIGH



39 1/2W

D23

CT2

TAB4

VOLTAGE

TRANSFORMER 2



–

22µ25V

C30

300K

R34

2.0K R30

R32

D30

–

22µ25V

C31

300K

R35

2.0K R31

R33

D31

: IF NOT SPECIFIED, 1SS270A

: IF NOT SPECIFIED, 1/4W ± 5%

: IF NOT SPECIFIED, 0.01µ / 16V

Figure S-4. Control Panel Circuit (R-22AM)

R-22AM R-23AM R-23AT

DIP

(R90)

R95

R70

DOOR SW

D71

R94 R93 (R92) (R91) R97

R41

R96

R71

SP1

R40

(J8)

Q40

R72

312

D70

D61

CN - G

10 12

C70

CN - B

CT1

TAB1

TAB2

TTM

BM

(BM)

(OL)

7 (5)

POWER

(POWER)

CN - A

(RY2)

1 3 (1) 5 (3) 9 (7)

RY1

(J23)

(J24)

(9)

CT2

TAB4

TAB3

(C74)

R101 R100

R99 R96

D95 D94

D93 (D92) (D91)

D97

D96

Q41

(Q201)B

(Q200)

(J7)

C71

(D85)

RY3

(VRS2)

C61

R63 (J11)

R66

WHT

(J29)

C62

(D201)

D81

RY4

45 50 5540

60 64

IC1

(Q85)

(J10)

E Q83

(J17)

(J18, R82)

(D82)

R64

D84

(J1)

(J6)

R73

(R87)

(J13, R83)

(J25, R84)

R80

(D50)

(Q82)

(D200)

R42

R43

(J9)

(J12, R85)

(C85)

R61

R65

D83

VRS1

R62

D62

(CN - F)

Q84

R300

R74

(R86)

R33

R32

D63

R67

(R9,J30)

C80

(J16) 16

(J19)

(J20, R81)

(F1)

C82

Q81

CF1

R21

(J3)

R79

Q80

R20

CN - H

C30

(J14,C10)

(C200)

(R76)

(R2)

C20

C21

(J21)

(R200) (R201)

E (Q50)

(C73)

IC2

R31

ZD1

(CN - D)

C72

(R77 ,J31)

(C11) (J15)

(J22)

(R78)

DIP



(R61,J13)

C60

CN - B

CT1

TAB2 TAB1

(R62)

R42

(R60)

DOOR SW

(Q60)

R63

CN - H

R50

D50

CN - J

C50

D20

ZD2

32 25 20 15 10 5

(C22)

(J2)

(D74

,R50)

D64

R68

Q20



(C90, J6)

(J10)

(D60, R65)

R51

R41

R40

(4) (5)

C6 Q2

(J11)

(D24)

R30

C30

(J4)

R82

R83

(J2)

(Q24)

(R22,J22)

D30

R34

RY2

S2 S1

1357

OL, BM

(J8)

POWER

(J26)

C81

(ZD3)

(R7, J28)

(R8)

(J27, R6)

C2 D6

CN - A

TAB3

TAB4

VRS1

(J9)

CT2

(C14)

(J3)

(J1)

(R90

,J5)

(CN - D)

CN - E

R84

R85

R81

R80

C81

ZD2

CF1

Q23

Q22

R32

R20

C21

D21

(C13)

(R90,J12)

IC1

15 20 25 30 32

C80

R36

R37

R10

D32

D33

Q20

E Q21

D22

RY3

(R23,J23)

(J7)

D23

C31

R31

B ZD1

Q70

S2 S1

64 33354045505560

5C7

C20

R70

SP1

C12

13 C11 B

Q10

C10

(F1)

45 67

D31

R33

R35

R-23AT R-22AM/23AM

Figure S-5. Printed Wiring Board

R-22AM R-23AM R-23AT

PARTS LIST

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

ELECTRIC PARTS

BM FMOTEA309WRK0 Blower motor 1 BH C1, C2 RC-QZA264WRE0 High voltage capacitor 2 AY

F1 QFS-CA017WRE0 Weak point A017 1 AF F2 QFS-CA007WRE0 Fuse 6.3A 1 AD F3, F4 QFS-CA010WRE0 Fuse M8A 2 AE F5, F6 QFS-IA002WRE0 High voltage fuse 0.75A/ 5kV [R-23AM/23AT] 2 AQ

F5, F6 QFS-IA004WRE0 High voltage fuse 0.6A/ 5kV [R-22AM] 2 AK

MG1, MG2 RV-MZA300WRE0 Magnetron 2 BG

∆

OL RLMPTA028WRE0 Oven lamp 1 AK R1 RR-WZA020WRE0 Monitor resistor 4.3 ohm 20W 1 AF SM RMOTDA238WRZZ Stirrer motor 2 AR SW1 QSW-MA095WRE0 1st. latch switch 1 AF SW2 QSW-MA095WRE0 2nd. latch switch 1 AF SW3 QSW-MA095WRE0 3rd. latch switch 1 AF SW4 QSW-MA086WRE0 Monitor switch 1 AF SW5 QSW-MA085WRE0 Stop switch 1 AF T1, T2 RTRN-A599WRE0 High voltage transformer [R-23AM/R-23AT] 2 BM

T1, T2 RTRN-A600WRE0 High voltage transformer [R-22AM] 2 BN

TF1, TF2 QFS-TA014WRE0 Temperature fuse 150˚C (MG.) 2 AG TF3, TF4 QFS-TA015WRE0 Temperature fuse 120˚C (OVEN, BM.) 2 AG 1- 1 FH-HZA064WRE0 Oven thermistor (2) 1 AV 1- 2 QSOCLA024WRE0 Oven lamp socket 1 AH 1- 3 FW-QZA117WRK0 High voltage rectifier assembly 1 AU

1- 4 FPWBFA335WRE0 Noise filter 1 AX 1- 5 QFSHDA019WRE0 Fuse holder 3 AH 1- 6 FACCVA013WRK0 Power supply cord 1 BG 1- 7 FH-HZA070WRE0 Oven thermistor (1) & Magnetron thermistor 2 AM

CABINET PARTS

2- 1 FDAI-A183WRW0 Base plate assembly 1 BC 2- 2 PSHEGA006WRE0 Rubber sheet A 2 AF 2- 3 PSHEGA007WRE0 Rubber sheet B 2 AE 2- 4 GCOVAA283WRW0 Rear cabinet 1 AX 2- 5 FFTASA064WRY0 Oven lamp access cover assembly 1 AN 2-5-1 PCUSU0407WRP0 Cushion 1 AA 2-5-2 PREFHA059WRP0 Reflector 1 AF 2- 6 GCABUA523WRP0 Outer case cabinet 1 BA 2- 7 FFPF-A016WRK0 Vibration-proof sheet 1 AU 2- 8 PZETEA079WRP0 Insulation sheet 2 AC

OVEN PARTS

4- 1 PZETEA047WRP0 Switch insulator 1 AC 4- 2 FDUC-A345WRY0 Exhaust duct assembly 1 AP 4- 3 FOVN-A444WRY0 Oven cavity 1 BS

∆

4- 4 PFILWA053WRP0 Oven light screen (Inside) 1 AE 4- 5 MLEVPA153WRF0 Switch lever A 1 AC 4- 6 MLEVPA154WRF0 Switch lever B 1 AC 4- 7 MLEVPA155WRF0 Switch lever C 1 AC 4- 8 MSPRCA075WRE0 Switch spring A 1 AB 4- 9 MSPRCA076WRE0 Switch spring B 2 AB 4-10 PHOK-A081WRF0 Latch hook 1 AP

∆

4-11 MHNG-A216WRM0 Lower oven hinge 1 AG

∆

4-12 PCUSUA442WRP0 Cushion 1 AF 4-13 PCUSU0407WRP0 Cushion 1 AA 4-14 FGLSPA063WRY0 Ceramic shelf 1 BF 4-15 FPLT-A008WRY0 Stirrer antenna upper assembly 1 AV 4-16 FPLT-A009WRY0 Stirrer antenna lower assembly 1 AV 4-17 LANGKA762WRP0 Partition angle R 1 AE 4-18 LANGQA370WRP0 Oven lamp mounting plate 1 AD 4-19 LBNDKA068WRP0 Capacitor holder 1 AD 4-20 PGIDHA054WRW0 Water-proof cover 1 AF 4-21 NSFTPA031WRF0 Antenna motor shaft 2 AH 4-22 PCUSUA451WRP0 Cushion 1 AB 4-23 PCUSUA417WRP0 Cushion 1 AB 4-24 MHNG-A215WRM0 Upper oven hinge 1 AG

∆

4-25 PCUSUA413WRP0 Cushion 1 AG 4-26 PCUSUA415WRP0 Cushion 3 AC 4-27 PDUC-A729WRF0 Air duct 1 AL 4-28 PDUC-A564WRW0 Mg exhaust duct 1 AP 4-29 PCUSUA414WRP0 Cushion 1 AD 4-30 LANGKA679WRM0 Fixing angle S 1 AD 4-31 HDECQA147WRM0 Corner cap right 1 AE 4-32 LANGFA195WRP0 Chassis support 1 AG

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

4-33 LBSHCA012WRE0 Cord bushing 1 AD 4-34 PCOVPA351WRF0 Stirrer cover 1 BA 4-35 FFIL-A005WRK0 Air intake filter assembly 1 AS 4-36 HDECEA001WRP0 Decoration sash 1 AR 4-37 HDECQA146WRM0 Corner cap left 1 AE 4-38 PCUSGA409WRP0 Cushion 2 AE 4-39 LANGQA440WRM0 Earth angle 1 AE 4-40 LANGQA512WRP0 Thermistor angle 1 AE 4-41 PCUSUA458WRP0 Cushion 1 AB 4-42 LANGQA514WRW0 Noise filter angle 1 AF 4-43 PCUSUA268WRP0 Cushion 1 AA 4-44 MSPRCA101WRE0 Switch lever spring C 1 AC

DOOR PARTS

5 DDORFA746WRK0 Door assembly 1 BP

∆

5- 1 FDORFA289WRT0 Door panel assembly 1 BH

∆

5- 2 GCOVAA242WRY0 Door case 1 BD 5- 3 FHNDMA011WRY0 Door lever assembly 1 AP 5- 4 GCOVHA350WRF0 Choke cover 1 AR 5- 5 JHNDPA169WRM0 Door handle 1 AU 5- 6 LANGKA766WRP0 Outside window fixing plate 2 AF 5- 7 PCUSGA430WRP0 Cushion 2 AM 5- 8 PGLSPA457WRE0 Door glass 1 AV 5- 9 PPACGA142WRP0 Door case packing 2 AF 5-10 PSHEPA428WRE0 Sealer film 1 AF 5-11 XWSSD40-10000 Washer : 4mm x 1mm 2 AA 5-12 XFPSD40P08K00 Screw : 4mm x 8mm 3 AA 5-13 XHTSD40P08RV0 Screw : 4mm x 8mm 4 AA 5-14 FANGKA200WRY0 Latch fixing angle 1 AQ 5-15 FLEVFA019WRY0 Joint lever 1 AP 5-16 LSTPCA002WRM0 Latch head 2 AM

∆

5-17 MLEVPA220WRF0 Head lever 1 AM 5-18 MSPRCA097WRE0 Latch spring 1 AG 5-19 HBDGCA093WRE0 Door badge [R-23AT] 1 AF 5-19 HBDGCA095WRE0 Door badge [R-23AM] 1 AF 5-19 HBDGCA096WRE0 Door badge [R-22AM] 1 AF 5-20 XEPSD40P20000 Screw : 4mm x 20mm 2 AB 5-21 PCUSUA523WRP0 Door lever cushion 2 AE 5-22 PSPA-A102WRE0 Door case spacer 2 AE

MISCELLANEOUS

6- 1 TINSMA014WRR0 Operation manual [R-23AT] 1 AR 6- 1 TINSMA016WRR0 Operation manual [R-22AM, R-23AM] 1 AM 6- 2 TLABHA029WRR0 Menu sticker [R-23AT] 1 AC 6- 3 FW-VZB769WRE0 Switch harness 1 AR 6- 4 FW-VZB765WRE0 Main wire harness 1 BB 6- 5 TLAB-A186WRR0 AL label 1 AB 6- 6 LBNDKA079WRE0 Wire holder 3 AB 6- 7 PTUB-A048WRZZ Tube 1 AF 6- 8 TCAUHA083WRR0 Belgium label 1 AB 6- 9 TSPCNC831WRR0 Rating label [R-23AT] 1 AK 6- 9 TSPCNC834WRR0 Rating label [R-23AM] 1 AK 6- 9 TSPCNC835WRR0 Rating label [R-22AM] 1 AK 6-10 TCAUHA176WRR0 H caution label 1 AC 6-11 TCAUHA082WRR0 Caution label 1 AC 6-12 TCAUHA257WRR0 S caution sheet 1 AE 6-13 LHOLDA004WRE0 Cord holder 1 AA 6-14 PZET-A018WRE0 Terminal insulator 2 AC 6-15 TLABSA064WRR0 A017 label 1 AC 6-16 LHLDWQ004YBE0 Purse lock L 1 AA 6-17 TLABSA069WRR0 Fuse label F6.3A 1 AB 6-18 TLABSA070WRR0 Fuse label M8A 2 AB 6-19 TLABSA066WRR0 Equipotential label 1 AD

SCRE,NUTS AND WASHERS

7- 1 XCBWW30P08000 Screw : 3mm x 8mm 2 AB 7- 2 XBPSD30P28KS0 Screw : 3mm x 28mm 1 AA 7- 3 XNESD30-24000 Nut : 3mm x 2.4mm 1 AA 7- 4 LX-BZA130WRE0 Special screw 1 AD 7- 5 LX-BZA116WRE0 Special screw 2 AD 7- 6 XBPWW40P04000 Screw : 4mm x 4mm 4 AB 7- 7 LX-BZA041WRE0 Special screw 2 AA 7- 8 LX-BZA125WRE0 Special screw 2 AB 7- 9 LX-CZA038WRE0 Special screw 2 AA 7-10 LX-EZA004WRE0 Special screw 2 AA

R-22AM R-23AM R-23AT

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

7-11 XOTSD40P06000 Screw : 4mm x 6mm 2 AA 7-12 LX-NZ0082WRE0 Special nut 1 AA 7-13 XFTSD40P12000 Screw : 4mm x 12mm 1 AA 7-14 XHPSD50P08000 Screw : 5mm x 8mm 8 AB 7-15 XBPSD50P12KS0 Screw : 5mm x 12mm 4 AC 7-16 XHTSD40P08RV0 Screw : 4mm x 8mm 17 AA 7-17 XOTSD40P12000 Screw : 4mm x 12mm 6 AA 7-18 XOTWW40P10000 Screw : 4mm x 10mm 12 AB 7-19 XJPSD40P10000 Screw : 4mm x 10mm 2 AA 7-20 XCPSD30P10000 Screw : 3mm x 10mm 3 AA 7-21 LX-WZA035WRE0 Special washer 2 AB 7-22 XOTWW40P08000 Screw : 4mm x 8mm 7 AB 7-23 PSPA-A101WRE0 Special washer 4 AB 7-24 XCPSD30P06000 Screw : 3mm x 6mm 2 AA 7-25 LX-BZA064WRE0 Special screw 1 AA 7-26 XOTSC40P12000 Screw : 4mm x 12mm 5 AA 7-27 LX-EZA042WRE0 Special screw 4 AB 7-28 XFTSD40P08000 Screw : 4mm x 8mm 1 AA 7-29 XTPSD40P08000 Screw : 4mm x 8mm 2 AA 7-30 XWWSD50-06000 Washer : 5mm x 0.6mm 4 AA 7-31 XONSC40P10000 Screw : 4mm x 10mm 1 AA 7-32 XWSSD40-10000 Washer: 4mm x 1mm 1 AA 7-33 XOTSD40P10RV0 Screw : 4mm x 10mm 1 AA

HOW TO ORDER REPLACEMENT PARTS

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

1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION

PACKING AND ACCESSORIES

TOP PAD ASSEMBLY FPADBA313WRK0

DOOR PROTECTION SHEET SPADPA552WRE0

DOOR PAD SPADF0341WRE0

WRAP COVER 

BOTTOM PAD ASSEMBLY FPADBA314WRK0

TRAY SUPPORT SPADPA551WRE0

6-1 INSTRUCTION MANUAL

* Not replaceable items.

PACKING CASE SPAKCD318WRE0 [R-23AT] SPAKCD323WRE0 [R-23AM] SPAKCD324WRE0 [R-22AM]

R-22AM R-23AM R-23AT

OVEN AND CABINET PARTS

7-31

2-5-2

4-37

4-24

4-4

7-30

4-15

7-23

4-16

7-1

1-2

4-18

4-11

7-22

TF4

7-21

7-6

4-3

7-12

1-1

2-5

7-30

2-7

2-5-1

4-38

7-15

1-7

6-6

7-17

4-36

2-6

7-22

7-18

4-26

4-2

7-16

4-21

7-19

7-4

4-12

4-21

7-16

4-34

4-43

6-5

7-26

7-22

2-8

TF1

7-14

7-16

7-14

7-16

7-19

TF2

7-16

7-10

4-31

7-27

7-16

2-8

7-16

7-27

4-25

4-20

4-23

7-29

7-18

2-4

7-16

4-26

4-27

7-18

7-28

4-26

4-28

1-6

4-8

SW3

7-18

SW4

4-5

SW5

7-22

4-44

4-6

6-6



SW2

7-20

1-5

4-42

7-16

1-4

7-16

6-15

4-1

SW1

7-2

7-14

1-7

4-19

4-22

4-10

7-11

7-16

MG1

4-40

MG2

1-3

7-16

4-9

4-7

4-17

6-8

6-10 6-11

7-25

7-18

7-16

4-39

7-18

7-7

7-16

4-33

7-33

4-29

7-20 1-5

4-32

7-18

7-26

4-30

7-32

6-19

6-17

6-18

7-24

TF3

1-6

7-13

7-21

4-13

7-5

2-1

4-35

7-17

7-9

7-16

7-17

6-13

7-8

7-9

2-2

7-8

2-3

7-11

4-14

6-6

4-41

R-22AM R-23AM R-23AT

DOOR PARTS

5-8

5-6

5-13

5-22

5-1

5-7

5-4

5-10

5-11

5-14

5-20

5-12

5-15

5-18

5-11

5-9

5-17

5-16

5-21

5-19

5-5

MISCELLANEOUS

Actual wire harness may be different from illustration.

5-3

6-7

6-3

5-2

5-13

5-6

6-4

6-14

6-16

R-22AM R-23AM R-23AT

CONTROL PANEL PARTS FOR R-23AT

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

3- 1 DPWBFC001WRU0 Control unit 1 BM 3- 1A QCNCMA308DRE0 4-pin connector (A) 1 AC 3- 1B QCNCMA312DRE0 3-pin connector (B) 1 AB 3- 1C QCNCWA030DRE0 12-pin connector (G) 1 AF 3- 1D QCNCMA039DRE0 3-pin connector (H) 1 AB 3- 1E QLUG-A002PRE0 Tab terminal (TAB1-4) 4 AB 3- 1F RV-KXA053DRE0 Fluorescent display tube 1 AW 3- 1G PCUSGA359WRP0 Cushion 2 AC C1 VCKYD11HF104Z Capacitor 0.1 uF 50V 1 AB C2 RC-EZA192DRE0 Capacitor 1000 uF 35V 1 AD C3 VCEAB31HW335M Capacitor 3.3 uF 50V 1 AA C4 VCKYB11EX103N Capacitor 0.01 uF 25V 1 AA C5 VCEAB31AW476M Capacitor 47 uF 10V 1 AA C6-7 VCKYD11CY103N Capacitor 0.01 uF 16V 2 AA C8 VCEAB31CW107M Capacitor 100 uF 16V 1 AB C9 VCEAB31EW226M Capacitor 22 uF 25V 1 AA C20 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C21 VCKYF31HF103Z Capacitor 0.01 uF 50V 1 AA C22 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C30 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C61-62 VCEAB31EW226M Capacitor 22 uF 25V 2 AA C70 VCKYF31HF103Z Capacitor 0.01 uF 50V 1 AA C71 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C72 VCKYB11EX103N Capacitor 0.01 uF 25V 1 AA C74 VCKYD11HF104Z Capacitor 0.1 uF 50V 1 AB C80 VCEAB31HW104M Capacitor 0.1 uF 50V 1 AM C81 VCEAB31HW225M Capacitor 2.2 uF 50V 1 AA C82 VCEAB31HW105M Capacitor 1.0 uF 50V 1 AA C200 VRD-B12EF183J Resistor 18k ohm 1/4W 1 AA CF1 RCRS-A010DRE0 Ceramic resonator (CST4.00MGW) 1 AD D1-4 VHD11ES1///-1 Diode (11ES1) 4 AB D5 VHD1SS270A/-1 Diode (1SS270A) 1 AA D6-7 VHD11ES1///-1 Diode (11ES1) 2 AB D61-64 VHD1SS270A/-1 Diode (1SS270A) 4 AA D70 VHD11ES1///-1 Diode (11ES1) 1 AB D71 VHD1SS270A/-1 Diode (1SS270A) 1 AA D81 VHD1SS270A/-1 Diode (1SS270A) 1 AA D83-84 VHD1SS270A/-1 Diode (1SS270A) 2 AA D93-97 VHD1SS270A/-1 Diode (1SS270A) 5 AA IC1 RH-IZA646DRE0 LSI 1 AX IC2 RH-IZA571DRE0 IC (AT24C04) 1 AP Q1 VS2SB953-PQ-4 Transistor (2SB953) 1 AG Q2 VS2SA933AS/-3 Transistor (2SA933ASTP) 1 AB Q20 RH-TZA037CBE0 Transistor (KRA101M) 1 AA Q40 RH-TZA037CBE0 Transistor (KRA101M) 1 AA Q41 VS2SB1238//-3 Transistor (2SB1238) 1 AA Q80 VSDTA114YSA-3 Transistor (DTA114YSA) 1 AB Q81 VSDTD143ES/-3 Transistor (DTD143ES) 1 AC Q83-84 VSDTB143ES/-3 Transistor (DTB143ES) 2 AC R1 VRD-B12EF182J Resistor 1.8k ohm 1/4W 1 AA R3 VRD-B12HF561J Resistor 560 ohm 1/2W 1 AA R4 VRD-B12EF102J Resistor 1.0k ohm 1/4W 1 AA R5 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R6 VRD-B12HF150J Resistor 15 ohm 1/2W 1 AA R20 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R31 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R32 VRD-B12EF272J Resistor 2.7k ohm 1/4W 1 AA R33 VRD-B12EF103J Resistor 10k ohm 1/4W 1 AA R40 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA R41 VRD-B12EF203J Resistor 20k ohm 1/4W 1 AA R42 VRD-B12EF393J Resistor 39k ohm 1/4W 1 AA R43 VRD-B12EF103J Resistor 10k ohm 1/4W 1 AA R50 VRD-B12EF182J Resistor 1.8k ohm 1/4W 1 AA R61-62 VRN-B12EK202F Resistor 2.0k ohm(F) 1/4W 2 AA R63-64 VRD-B12EF102J Resistor 1.0k ohm 1/4W 2 AA R65-66 VRD-B12EF304J Resistor 300k ohm 1/4W 2 AA R67-68 VRD-B12EF473J Resistor 47k ohm 1/4W 2 AA R70 VRD-B12EF101J Resistor 100 ohm 1/4W 1 AA R71 VRD-B12EF303J Resistor 30k ohm 1/4W 1 AA R72 VRD-B12EF112J Resistor 1.1k ohm 1/4W 1 AA R73 VRD-B12EF333J Resistor 33k ohm 1/4W 1 AA R74 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA R79 VRD-B12EF473J Resistor 47k ohm 1/4W 1 AA R80 VRD-B12EF471J Resistor 470 ohm 1/4W 1 AA R83-84 VRD-B12HF390J Resistor 39 ohm 1/2W 2 AA R93-101 VRD-B12EF153J Resistor 15k ohm 1/4W 9 AA R200 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA

R-22AM R-23AM R-23AT

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

R201 VRD-B12EF682J Resistor 6.8k ohm 1/4W 1 AA R300 VRD-B12EF105J Resistor 1.0M ohm 1/4W 1 AA (J2) VRD-B12EF822J Resistor 8.2k ohm 1/4W 1 AB (J3) VRD-B12EF363J Resistor 36k ohm 1/4W 1 AA RY1 RRLY-A078DRE0 Relay (OJ-SH-118LM) 1 AG RY3-4 RRLY-A059DRE0 Relay (VS14MB) 2 AK SP1 RALM-A014DRE0 Buzzer (PKM22EPT) 1 AG T1 RTRNPA080DRE0 Touch control transformer 1 AU CT1-2 RTRN-A060DRE0 Current transformer 2 AH VRS1 RH-VZA010DRE0 Varistor (TNR15G471K) 1 AE ZD1 VHEHZ12C1//-1 Zener diode (HZ12C1) 1 AA ZD2 VHEHZ4C3///-1 Zener diode (HZ4C3) 1 AA 3- 2 FPNLCB470WRK0 Control panel frame with key unit assembly 1 BA 3- 2-1 FUNTKA965WRE0 Key unit 1 AW 3- 2-2 HDECAA195WRP0 Decoration metal fittings 1 AP 3- 2-3 PCUSUA451WRP0 Cushion 1 AB 3- 2-4 PCUSGA380WRP0 Cushion 1 AB 3- 3 LANGTA243WRW0 Control panel mounting angle 1 AF 3- 4 XEPSD30P10XS0 Screw; 3mm x 10mm 6 AA 3- 5 XEPSD40P12000 Screw; 4mm x 12mm 1 AA 3- 6 XHTSD40P08RV0 Screw; 4mm x 8mm 1 AA 3- 7 XCTSD40P08000 Screw; 4mm x 8mm 1 AA

CONTROL PANEL PARTS FOR R-23AM / R-22AM

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

3- 1 DPWBFC007WRU0 Control unit [R-23AM] 1 BK 3- 1 DPWBFC009WRU0 Control unit [R-22AM] 1 BK 3- 1A QCNCMA308DRE0 4-pin connector (A) 1 AC 3- 1B QCNCMA312DRE0 3-pin connector (B) 1 AB 3- 1C QCNCMA381DRE0 5-pin connector (E) 1 AD 3- 1D QCNCMA039DRE0 3-pin connector (H) 1 AB 3- 1E QCNCMA338DRE0 3-pin connector (J) 1 AB 3- 1F QLUG-A002PRE0 Tab terminal (TAB1-4) 4 AB 3- 1G RV-KXA053DRE0 Fluorescent display tube 1 AW 3- 1H PCUSGA400WRP0 Cushion 2 AC C1 VCKYD11HF104Z Capacitor 0.1 uF 50V 1 AB C2 RC-EZA192DRE0 Capacitor 1000 uF 35V 1 AD C3 VCEAB31HW335M Capacitor 3.3 uF 50V 1 AA C4 VCKYB11EX103N Capacitor 0.01 uF 25V 1 AA C5 VCEAB31CW476M Capacitor 47 uF 16V 1 AA C6-7 VCKYD11CY103N Capacitor 0.01 uF 16V 2 AA C8 VCEAB31CW107M Capacitor 100 uF 16V 1 AB C9 VCEAB31EW226M Capacitor 22 uF 25V 1 AA C10 VCKYD11HF104Z Capacitor 0.1 uF 50V 1 AB C11 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C12 VCKYD11HF104Z Capacitor 0.1 uF 50V 1 AB C20 VCEAB31HW104M Capacitor 0.1 uF 50V 1 AM C21 VCEAB31VW475M Capacitor 4.7 uF 35V 1 AA C30-31 VCEAB31EW226M Capacitor 22 uF 25V 2 AA C50 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA C60 VCKYB11EX103N Capacitor 0.01 uF 25V 1 AA C80-81 RC-KZA129DRE0 Capacitor 2200 pF 16V 2 AB C90 VRD-B12EF183J Resistor 18k ohm 1/4W 1 AA CF1 RCRS-A010DRE0 Ceramic resonator CST4.00MGW 1 AD D1-4 VHD11ES1///-1 Diode (11ES1) 4 AB D5 VHD1SS270A/-1 Diode (1SS270A) 1 AA D6-7 VHD11ES1///-1 Diode (11ES1) 2 AB D20 VHD11ES1///-1 Diode (11ES1) 1 AB D21-23 VHD1SS270A/-1 Diode (1SS270A) 3 AA D30-33 VHD1SS270A/-1 Diode (1SS270A) 4 AA D50 VHD1SS270A/-1 Diode (1SS270A) 1 AA IC1 RH-IZA648DRE0 LSI 1 AV Q1 VS2SB953-PQ-4 Transistor (2SB953) 1 AG Q2 VS2SA933AS/-3 Transistor (2SA933ASTP) 1 AB Q10 RH-TZA037CBE0 Transistor (KRA101M) 1 AA Q20 VSDTA114YSA-3 Transistor (DTA114YSA) 1 AB Q21 VSDTD143ES/-3 Transistor (DTD143ES) 1 AC Q22-23 VSDTB143ES/-3 Transistor (DTB143ES) 2 AC Q70 RH-TZA037CBE0 Transistor (KRA101M) 1 AA R1 VRD-B12EF182J Resistor 1.8k ohm 1/4W 1 AA R2 VRD-B12HF561J Resistor 560 ohm 1/2W 1 AA R3 VRD-B12EF102J Resistor 1.0k ohm 1/4W 1 AA R4 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R5 VRD-B12HF150J Resistor 15 ohm 1/2W 1 AA R10 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R20 VRD-B12EF471J Resistor 470 ohm 1/4W 1 AA R22-23 VRD-B12HF390J Resistor 39 ohm 1/2W 2 AA

R-22AM R-23AM R-23AT

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

R30-31 VRD-B12EF202J Resistor 2.0k ohm 1/4W 2 AA R32-33 VRD-B12EF102J Resistor 1.0k ohm 1/4W 2 AA R34-35 VRD-B12EF304J Resistor 300k ohm 1/4W 2 AA R36-37 VRD-B12EF473J Resistor 47k ohm 1/4W 2 AA R40 VRD-B12EF112J Resistor 1.1k ohm 1/4W 1 AA R41 VRD-B12EF114J Resistor 110k ohm 1/4W 1 AA R42 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA R50 VRD-B12EF101J Resistor 100 ohm 1/4W 1 AA R51 VRD-B12EF512J Resistor 5.1k ohm 1/4W 1 AA R63 VRD-B12EF473J Resistor 47k ohm 1/4W 1 AA R65 VRD-B12EF182J Resistor 1.8k ohm 1/4W [R-23AM] 1 AA R65 VRD-B12EF242J Resistor 2.4k ohm 1/4W [R-22AM] 1 AA R70 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA R80-81 VRD-B12EF224J Resistor 220k ohm 1/4W 2 AA R82-83 VRD-B12EF472J Resistor 4.7k ohm 1/4W 2 AA R84-85 VRD-B12EF153J Resistor 15k ohm 1/4W 2 AA R90 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R91 VRD-B12EF682J Resistor 6.8k ohm 1/4W 1 AA (5) VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA RY1 RRLY-A078DRE0 Relay (OJ-SH-118LM) 1 AG RY2-3 RRLY-A059DRE0 Relay (VS14MB) 2 AK SP1 RALM-A007DRE0 Buzzer (PKM22EPT-CA) 1 AF T1 RTRNPA080DRE0 Touch control transformer 1 AU CT1-2 RTRN-A060DRE0 Current transformer 2 AH VRS1 RH-VZA034DRE0 Varistor (10G471K) 1 AD ZD1 VHEHZ12C1//-1 Zener diode (HZ12C1) 1 AA ZD2 VHEHZ4C3///-1 Zener diode (HZ4C3) 1 AA 3- 2 FPNLCB472WRK0 Control panel frame assembly 1 AX 3- 2-1 GMADIA067WRF0 Display window 1 AE 3- 2-2 HDECAA207WRP0 Decorative metal fittings 1 AT 3- 2-3 HPNLCB155WRF0 Control panel 1 BA 3- 2-4 PCUSUA451WRP0 Cushion 1 AB 3- 3 LANGTA243WRW0 Control panel mounting angle 1 AF 3- 4 XEPSD30P10XS0 Screw; 3mm x 10mm 11 AA 3- 5 XEPSD40P12000 Screw; 4mm x 12mm 1 AA 3- 6 XFPSD40P08K00 Screw; 4mm x 8mm 1 AA 3- 7 JKNBKA510WRM0 Knob 1 AE 3- 8 LANGTA304WRP0 Rotary encoder mounting plate 1 AD 3- 9 RVR-BA016WRK0 Rotary encoder 1 AY 3- 10 JBTN-A895WRM0 Select button 4 AE 3- 11 JBTN-A896WRM0 Start button 1 AE 3- 12 DPWBFB195WRU0 Switch unit assembly 1 AP 3- 12-1 FW-VZA165DRE0 Lead wire harness (2-pin) 1 AF 3- 12-2 FW-VZA166DRE0 Lead wire harness (5-pin) 1 AH 3- 12-3 QSW-PA025DRE0 Tact switch (SW1-SW5) 5 AD 3- 13 PCUSUA404WRP0 Select cushion 4 AC 3- 14 PCUSGA401WRP0 Cushion 1 AD 3- 15 MSPRPA082WRE0 Spring 1 AD 3- 16 PCUSUA407WRP0 Water proof cushion B 1 AB 3- 17 PCUSUA408WRP0 Water proof cushion C 1 AC 3- 18 PCUSUA406WRP0 Water proof cushion A 1 AB 3- 19 PSHEGA005WRP0 Water proof sheet 1 AE 3- 20 QW-VZA122WRE0 Earth wire 1 AC 3- 21 XEPSD30P08XS0 Screw; 4mm x 8mm 2 AA 3- 22 XHTSD40P08RV0 Screw; 4mm x 8mm 1 AB 3- 23 LX-WZA049WRE0 Special washer 1 AA

HOW TO ORDER REPLACEMENT PARTS

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

1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION

R-22AM R-23AM R-23AT

CONTROL PANEL PARTS

R-23AT

6-9

3-2

3-2-3

3-2-4

3-2-2

3-7

3-1

3-5

3-4

3-6

3-3

6-9

3-2-2

3-2

3-2-1

3-10

3-2-1

3-2-3

3-13

3-14

3-2-4

CONTROL PANEL PARTS R-22AM, R-23AM

3-1

3-12

3-19

3-16

3-15

3-21

3-7

3-3

3-4

3-9

3-18

3-17

3-5

3-8

3-4

3-6

3-20

3-23

3-22

3-11

'99SHARP CORP. (12S0.520E) Printed in Germany.

Sharp R23-004 Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual