Sharp R-771(W)N User manual

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SHARP SERVICE MANUAL
$11813R771EHW
—
MICROWAVE
OVEN
WITH
GRILL
AND
BOTTOM
HEATER
mopets R-771(W)N
~ R-771(B)
R-771(W)
R-771(IN)
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
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DESGRIPTION
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APPEARANCE
VIEW
/
WIRING/RE-WIRING.
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OPERATION
SEQUENCE
2...
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es
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Us
ssirantwneansegesoees
FUNCTION
OF
IMPORTANT
COMPONENTS)
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TOUCH
CONTROL
PANEL
ASSEMBLY
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TEST
PROCEDURES.
.......ssssccssserreonscssecsecesssncesscncnessssaceaceunsesennsssasasseansosecsenenensensnscanscnsonases
sai
susucasvonsants
DESCRIPTION
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LSI
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COMPONENT
REPLACEMENT
AND
ADJUSTMENT
PROCEDURE
.......ccccssssssseserserseseeeeeseseeessenseeseses
WARING
DIAGRAM
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excdeunh
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PICTORIAL
DIAGRAM
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ecto
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4
CONTROL
PANEL
CIRCUIT
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PRINTED
WIRING
BOARD
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PARTS
LIST
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OVEN
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eeseoneseuassnsanansnaaaacosscrsonsanensonccecesuasuccneneccans
CONTROL
PANEL
PARTS/DOOR
PARTS/MISC.
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46
PACKING
AND
ACCESSORIES.
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SHARP CORPORATION
R-771 - 1

CAUTION
MICROWAVE
RADIATION
Personnel!
will
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
far
inte
utsattas
for
mikrovagsenergi
som
kan
ustrala
fran
magnetronen
eller
andre
mikrovagsalstrande
anordningar
om
dessa
ar
felanslutna
eller
anvands
pa
fel
sait.
Alla
in-och
utgangsanslutningar
fér
mikrovagor,
vagledare,
flansar
och
packningar
maste
vara
fast
anslutna.
Mikrovagsgeneratorn
far
inte
arbeta
utan
att
absorberande
belastning
ar
ansluten.
Titta
aldrig
in
i@n
éppen
vagledare
eller
antenn
nar
mikrovagsgeneratorn
ar
pakoppiad
eller
laddad.
VAROITUS
MIKROAALTOSATELYA
Kayttaja
ei
saa
joutua
alttiiksi
mikroaaltoenergialle,
jota
voi
sateill4
magnetronista
tai
muusta
mikroaaltoja
kehittavasta
laitteesta,
jos
sita
kaytetaan
tai
jos
se
kytketaan
vaarin.
Kaikkien
mikroaaltoliitantdjen
seka
sy6tté-etta
ulostulopuolella,
aaltoputkien
laippojen
ja
tiivisteiden
tulee
olla
varmistettuja.
|
Mikroaaltouunnia
ei
koskaan
saa
kayttaa
ilman
kuormaa
jossa
mikroaaltoenergiaa
kuluu.
Avoimeen
aaltoputkeen
tai
antenniin
ei
koskaan
saa
katsoa
virran
ollessa
kytkettyna.
ADVARSEL
MIKROBOLGESTRALING
Personell
ma
ikke
utsettes
for
mikrobglge-energi
som
kan
utstales
fra
magnetronen
eller
andre
mikrobalge-generende
deler
dersom
apparatet
feilbetjenes
eller
blir
feiltikoplet.
Alle
inn-og
ut-tilkoplinger
i
forbindelse
med
mikrobalge-stralingen,
balgeledere,
flenser
og
tetningsringer/pakninger
ma
festes
ordentlig.
Aldri
bruk
apparatet
med
mindre
en
mikrobalge-absorberende
last
er
plassert
i
ovnsrommet.
Aidri
se
direkte
inn
i
en
Apen
balgeleder
eller
antenne
imens
apparatet
er
stramferende.
ADVARSEL
MIKROBOLGEBESTRALING
Man
ber
ikke
udsaatte
sig
for
mikrobglgebestraling
fra
magnetronen
eller
andre
mikrobalgefrembringende
anordninger,
hvilket
kan
ske
hvis
apparatet
er
forkert
tilsluttet
eller
bruges
forkert.
Alle
mikrobalgeindgange
og-udgange,
balgeledere,
flanger
og
teetningsstrimler
ma
veere
forsvarligt
udiert.
Anvend
aldrig
ovnen
uden
en
mikrobglgesabsorberende
anordning.
Se
aidrig
ind
ien
Aben
balgeleder
eller
antenne,
mens
ovnen
er
i
brug.
R771 - 2

en Be ee ee, oe,
a
5
SERVICE MANUAL
SHARP
MICROWAVE
OVEN
WITH
GRILL
AND
BOTTOM
HEATER
R-771(B) / R-771(W)
R-771(IN) / R-771(W)N
GENERAL IMPORTANT INFORMATION
This
Manual
has
been
prepared
to
provide
Sharp
Corp.
Service
engineers
with
Operation
and
Service
Information,
Itis
recommended
that
service
engineers
carefully
study
the
entire
text
of
this
manual,
so
they
will
be
qualified
to
render
satisfactory
customer
service.
WARNING
Note:
The
paris
marked
"*"
are
used
in
voltage
more
than
250V.
(Parts
List)
Anm:
Delar
market
med
"*"
har
en
spanning
6verstigande
250V.
Huom:
Huolto-ohjeeseen
merkitty
"tahdella"
osat
joissa
jannite
on
yli
250
V.
Bemerk:
Deler
som
er
merket
"asterisk"
er
utsatt
for
spenninger
over
250V
til
jord.
Bemeerk:
"Dele
market
med
stjerne
benyttes
med
hgjere
spzending
end
250
volt.
WARNING
; 0 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 to the oven.
Servicing
and
repair
work
must
be
carried
out
only
by
trained
service
engineers.
Removal
of
the
outer
wrap
gives
access
to
potential
above
250V.
All
the
parts
marked
"A"
on
the
parts
list
may
cause
undue
microwave
exposure,
by
themselves,
or
when
they
are
damaged,
loosened
or
removed.
Never
operate
the
oven
with
the
outer
cabinet
removed.
(Because
air
flow
is
eliminated,
and
the
excess
heat
generated
on
adjacent
components
can
cause
permanent
damage
or
fire).
SHARP CORPORATION
OSAKA, JAPAN
R-771 - 3

SOOM RT tear ree
tasted
enrol
SERVICING |
WARNING TO SERVICE PERSONNEL
result in.electrocution.
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2} Door opened, and wedged open.
3) Discharge high voltage capacitor.
WARNING: AGAINST THE CHARGE OF THE HIGH-
VOLTAGE CAPACITOR
The high-voltage capacitor remains charged about 60 sec-
onds after the oven has been switched off. Wait for 60
seconds
and
ihen
short-circuit
the
connection
of
the
high-
voliage
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, inthis event carry out3D checks and
then disconnect the leads to the primary of the power trans-
former. Ensure that these leads remain isolated from other
components and the oven chassis. (Use insulation tape if
necessary.) When the testing is completed carry out 3D
checks and reconnect the leads to the primary of the power
transformer.
Microwave
ovens
contain
circuitry
capable
of
producing
very
high
voltage
and
current,
contact
with
following
parts
will
High
voltage
capacitor,
Power
transformer,
Magnetron,
High
voltage
rectifier
assembly,
High
voltage
harness.
voltage capacitor (thatis, of the connecting lead of the high- |.
REMEMBER TO CHECK 4R
1)
Reconnect
all
leads
removed
from
components
during
testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run the oven. Check all functions.
Microwave
ovens
should
not
be
run
empty.
To
test
for
the
presence
of
microwave
energy
within
a
cavity,
place
a
cup
of
cold
water
on
the
oven
turntable,
close
the
door
and
set
the
power
to
HIGH
and
set
the
microwave
timer
for
two
(2)
minutes.
When
the
two
minutes
has
elapsed
(timer
at
zero)
carefully
check
that
the
water
is
now
hot.
If
the
water
remains
cold
carry
out
3D
checks
and
re-examine
the
connections
to the
compo-
nent
being
tested.
When all service work is completed, and the oven is full
assembled,
the
microwave
power
output
should
be
checked
and
a microwave leakage test carried out.
Magnetronovens
bevatten
circuits
die
een
zeer
hoge
spanning
en
stroom
kunnen
voortbrengen.
Contact
met
de
volgende
onderdelen
kan
elektrocutie
tot
gevolg
hebben.
Hoogspanningscondensator,
hoogspanningstransformator,
magnetron,
hoogspanningsgelijkrichter,
hoogspannings
kabelboom.
VERGEET
DE
VOLGENDE
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
geisoleerde
schroevedraaier kortsluit tegen het chassis.
Sharp
beveelt
ten
sterkste
aan
dat,
voor
zover
mogelijk,
defecten
worden
opgespoord
wanneer
de
stekker
uit
het
stopcontactis
gehaald.
Somsis
hetnodig
omde
stroomtoevoer
weer
tot
stand
te
brengen
nadat
de
buitenmantel
verwijderd
is.
Herhaal
dan
de
bovengenoemde
3
stappen
en
haal
de
electrische
draden
ult
de
primaire
zijde
van
de
vermogenstransformator.
Zorg
ervoor
dat
deze
draden
geisoleerd
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.
Conitroleer
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 iwee (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 aliereerste 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-771 - 4
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en yah an et orprgrntnatne en a nnrennaned ati fy Sant ig errata eae eit PE RAE
* cle TRS eS Sree STE AF r ey Ee
Los
hornos
de
microondas
contienen
circuitos
eléctricos
capaces
de
producir
voltajes
de
alta
tensi6n
y
descargas
eléctricas.
Para
evitar
el
riesgo
de
electrocucién,
absténgase
de
tocar
los
siguientes
componentes:
condensador
de
alta
tensi6n,
transformador
de
alta
tensién,
magnetrén,
dispositivo
del
rectificador
de
alta
tensién
y
arnés
de
alta
tension.
RECUERDE
LA
COMPROBACION
3D
_|
1)
Desconecte
la
alimentacion.
|
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
conexién
del
condensador
de
alio
voltaje
(esto
es,
del
conductor
de
conexién
del
rectificador
de
alto
voltaje)
al
chasis
con
un
destornillador
de
mango
aislado,
Se
recomienda
encarecidamente
que
siempre
que
sea
posible
la
localizacién
de
fallos
se
realice
con
la
alimentacién
desconectada.
Puede
ser
que
en
algunos
casos
sea
necesario
conectar
la
alimentacién
después
de
haber
retirado
la
carcasa
exterior.
En
este
caso,
realice
las
comprobaciones
3D
y
luego
desconecte
los
conductores
del
primario
del
_
jgtransformador
de
alimentacién.
Asegurese
de
que
esios
¥
conductores
permanezcan
aislados
de
otros
componentes
y
del
chasis
del
horno.
(Use
cinta
aislante
si
es
necesario).
Cuando
termine
la
prueba
efecite
las
comprobaciones
3D
y
reconecte
los
conductores
al
primario
del
transformador
de
alimentaci6on.
Kontakt
med
féljande
komponenter
kan
leda
till
dédsfall:
KOM
IHAG
ATT
KONTROLLERA
3
STEG
1) Koppla fran stromkallan.
2) Oppna dérren pa glant.
3) Ladda ur h6gspanningskondensaiorn.
VARNING FOR LADDNINGEN |
HOGSPANNINGSKONDENSATORN
Hégspanningskondensatorn
&r
laddad
i
60
sekunder
efter
det
att
ugnen
stangts
av.
Vania
60
sekunder
och
korislut
sedan
kondensatoms
anslutning
(dvs
ansiutningen
till
hdgspanningslikriktaren)
till
chassietmed
hjalp
aven
isolerad
skruvmejsel.
Sharp
rekommenderar
att
fels6kning
sker
med
strommen
frankopplad.
Ibland
kan
det
var
nédvandigt
att
koppla
pa
strommen
efter
det
att
hdljet
avlagsnats,
utfor
da
3
Steg
kontrollen
och
koppla
sedan
fran
ledarna
till
transformatorns
primarsida.
Se
till
att
ledarna
ar
isolerade
fran
andra
komponenter
och
chassiet.
(Anvand
Isoleringsband
om
det
behévs).
Nar
Du
testat
fardigt
utfér
Du
3
Steg
kontrollen
och
ansluter
ledningarna
till
transformatorns
primarsida
igen.
R-771
ger
RECUERDE
LA
COMPROBACION
4C
1)
Conecte
todos
los
componentes
desconectados
de
los
componentes
durante
la
prueba.
Coloque la carcasa exterior (cabina).
Conecte la alimentaci6n.
Compruebe
todas
sus
funciones
despues
de
poner
en
marcha e] horno.
Los
hornos
de
microondas
no
deben
funcionar
vacios.
Para
comprobar
!a
presencia
de
energia
de
microondas
dentro
de
una
cavidad,
coloque
una
taza
de
agua
fria
en
el
plato
giratorio
del
horno,
cierre
!a
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
fria,
efecttie
las
comprobaciones
3D
y
vuelvaa
examinar
las
conexiones
de
!os
componentes
que
han
sido
probados.
Cuando
haya
terminado
la
intervencion
en
el
equipo
y
e!
horno
haya
sido
ensamblado
de
nuevo
completamente,
debera
comprobar
la
potencia
de
salida
de
microondas
y
realizar
una
prueba
de
fugas
de
microondas.
MikrovAgsugnar
innehaller
kretsar
som
producerar
mycket
héga
sp&nningar
och
strommar.
Hdgspanningskondensator,
transformator,
magnetron,
hdgspannings
likriktare,
hgspannings
kablage.
KOM
IHAG
ATT
KONTROLLERA
4
STEG
4)
Anslut
alla
ledningar
som
anvants
vid
testning
2)
Saitt
tillbaka
ytterhdljet.
3)
Anslut
stromkallan
pa
nyit.
.
4)
S€tt
pA
ugnen.
Kontrollera
alla
funktioner.
Mikrovagsugnar
far
inte
anvandas
tomma.
Kontrollera
mikrovagsstrainingen
|
olika
delar
av
ugnen
genom
att
placera
en
kopp
med
kallt
vatten
p&
ugnens
tallrik,
stang
d6rren,
stall
in
HIGH
och
stall
in
2
minuter
pa
timern.
Nar
tva
minuter
har
gatt
(timem
visar
0)
kontrollerar
du
om
vattnet
ar
varmt.
Om
vatinet
fortfarande
ar
kallt
utfér
Du
3
steg
kontroller
och
kontrollerar
anslutningarna
till
varje
enskild
komponent
pa
nyit.
Nar
all
service
ar
klar
och
ugnen
ihopskruvad
skall
ugnens
uteffekt
och
eventuellt
mikrovagslackage
kontrolleras.
- §

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
1!
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
de!
condensatore
ad
alta
tensione
(cioé
del
conduttore
di
collegamento
del
raddrizzatore
ad
alta
tensione)
sul
telaiodelforno.
Sharp
raccomanda,
nei
limiti
del
possibile,
che
la
ricerca
dei
guasti
avvenga
in
assenza
di
alimentazione
elettrica.
in
alcuni
casi
tuttavia,
pud
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
del!'intervento,
eseguire
nuovamente
itre
controlli
e
ricollegare
i
conduttori
al
primario
de!
trasformatore.
\
forni
a
microonde
contengono
un
circuito
elettrico
in
grado
di
generare
tensioni
e
correnti
estremamente
elevate.
L'eventuale
contatto
con
i
seguenti
componenti
pud
causare
la
folgorazione:
condensatore
ad
alta
tensione;
trasformatore
ad
alta
tensione;
magnetron;
rettificatore
alta
tensione;
cablaggio
ad
QUATTRO
VERIFICHE
IMPORTANT!
DA
NON
DIMENTICARE
4)
Ricollegare
tutti
i
conduttori
staccati
dai
vari
componenti
durante
!'intervento.
2)
Rimontare
la
scatola
esterna.
3)
Ripristinare
l'alimentazione
elettrica.
4)
Rimettere
in
funzione
il
forno.
Controllare
tutte
fe
funzioni.
|
forni
a
microonde
non
devono
mai
funzionare
a
vuoto.
Per
verificare
la
presenza
di
energia
da
microonde
all'interno
di
una
cavita,
mettere
una
tazza
di
acqua
fredda
su!
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
caida.
Se
l'acqua
6¢/(
timasta
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,
€
necessario
controllare
la
potenza
delle
microonde
emesse
ed
eseguire
un
test
per
verificare
che
non
vi
sia
alcuna
dispersione.
‘®
R-771 - &

PRODUCT DESCRIPTION
SPECIFICATION
DESCRIPTION
Power
Requirements
230
Volts
|
50
Hertz
.
Single
phase,
3
wire
earthed
.
1
a
i
Power
Consumption
Microwave
cooking
1.6kW
Approx.
6.9A
Top
Grill
mode
1.25kW
=
Approx.
5.4A
Grill
cooking
Bottom
Heater
mode
0.85kW
=
Approx.3.7A
Top
and
Bottom
mode
2.05
kW
~~
Approx.
8.9A
‘
Micro
and
Top
Grill
2.8kW
Approx.
12.7A
Pual
cooking
Micro
and
Bottom
Heater
2.35
kW
Approx.
11
A
Power
Output
900
W
nominal
of
RF
microwave
energy
(measured
by
method
of
IEC
705)
Operating
fequency
2450
MHz
Grill
heating
element
Power
Output
(Top
Gritl}}
1200
W
(600
W
x
2)
Bottom
heating
element
Power
Output
|
800
W
.
E Cooking Cavity Dimensions .
207 mm
357 mm
Turntable
diameter
Ps2emm
Control
Complement
Twin-Jog
Touch
Conirol
System
Clock
(1:00
-
12:59
or
0:00
-
23:593)
/
Timer
(0
-
90
minutes
Microwave
Power
for
Variable
Cooking
520 mm
309 mm including foot
436 mm
349 mm
Repetition Rate;
TOO
FS
cei
ceceastwhenaactdsnicacnaedine
Full
power
throughout
the
cooking
time
FO
Pe
gircarstactathctentns
pias
Orinekerevicesinavisants
approx.
70%
of
FULL
Power
;
BOG
Gis
ivecuthiarasoananseaieanameenile
approx.
50%
of
FULL
Power
3
BO
SG
oscd
ea
eteascatessdati
eae
eume
chet
tiss
approx.
30%
of
FULL
Power
g
LOG
ieculiinisieue
niddvaevnatebittiewnncelinsereaae
approx.
10%
of
FULL
Power
|
LESS
(~)/MORE
(4)
buttons,
LANGUAGE
button
INFORMATION
button,
SNACK
buiton
PIZZA button, AUTO COOK/DEFROST button
MICROWAVE power button
Mode select knob
STOP button, MINUTE PLUS button
START button, CLOCK setting button
TIME/WEIGHT knob
Set
Weight
Approx.
19
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-771 - 7

OVEN
_
Control
panel
.
Oven
lamp
_
Grill
heating
element
(Top
Grill)
-
Door
opening
button
Waveguide
cover
Oven
cavity
_
Turntable
motor
shaft
_
Grill
heating
element
(Bottom
Heater)
9.
Door
seals
and
sealing
surfaces
40.Ventilation
openings
41,Outer
cabinet
42,Power
supply
cord
oy onrnan>
4.
Ensure
that
the
bottom
heater
is
in
the
lowest
position
as
shown
in
the
diagram,
as
itis
possible
Turntable
to
move
it
up
and
down
to
help
with
cleaning.
support
2.
Place
the
turntable
support
over
the
turntable
motor
shaft
on
the
floor
of
the
cavity.
3.
Then
place
the
turntable
on
to
the
turntable
SUP-
-
port.
=
an
SESS
Bottom
Turntable
oP
:
a
heater
motor
shaft
{
Digital
display
and
indicators
~
MICROWAVE
indicator
.
TOP
and
BOTTOM
GRILL
indicator
_
WEIGHT
(kg)
indicator
_
MICROWAVE
POWER
LEVEL
indicator
_
LESS/MORE
indicator
_
TIME
indicator
_
CLOCK
SET
indicator
.
COOK
indicator
_
INFORMATION
indicator
—_—
conrtanbkon
Operating
Buttons
40.
INFORMATION
button
44,
LANGUAGE
button
42.LESS/MORE
button
43.SNACK
button
44,.PIZZA
button
45.AUTO
COOK/DEFROST
buttons
46.DUAL
GRILL
button:
4
PRESS
=
MICROWAVE
&
TOP
GRILL
2
PRESSES
=
MICROWAVE
&
BOTTOM
GRILL
17.MICROWAVE
POWER
LEVEL
button
18.TOP
OR
BOTTOM
GRILL
button:
4
PRESS
=
TOP
GRILL
2
PRESSES
=
BOTTOM
GRILL
49,TOP
&
BOTTOM
GRILL
button:
(Top
and
Bottom
Grill
elements
in
use
together)
20.MINUTE
PLUS/START
buiton
91.STOP
bution
22.
CLOCK
SETTING
button
93,
TIME/WEIGHT
dial
24,.DOOR
OPEN
button
R-771
-
8

OPERATION
SEQUENCE
JFF CONDITION
slosing
the
door
activates
the
primary
latch
switch
and
the
itop
switch.
MPORTANT:
Nhen
the
oven
door
is
closed,
the
contacts
COM-NC
if
the
monitor
switch
must
be
open.
When
the
micro-
yave
oven
is
plugged
ina
wall
outlet
(230V
/50Hz),
the
ine
voltage
is
supplied
to
the
noise
filter
and
the
:ontrol
unit.
Figure O-1 on page 32
.
The
oven
display
will
flash
"PRESS
STOP"
in
6
lan-
guage.
»,
Press
the
STOP
button.
The
oven
display
will
flash
"SELECT
LANGUAGE’
in
6
languages.
}. Select language as follows.
3-1.
Choose
desired
language
by
pressing
the
LAN-
GUAGE
button.
3-2.
Start
the
setting
by
pressing
the
START
button.
The
oven
display
will
flash
"SET
CLOCK"
in
se-
lected
language.
|, Set the clock as follows.
4-1.
Choose
the
12
hour
clock
or
the
24
hour
clock
by
pressing
the
CLOCK
setting
button.
4.2.
Setthe
hours
by
rotating
the
TIME/WEIGHT
knob.
4-8.
Change
from
hours
to
minutes
by
pressing
CLOCK
setting
button.
.
4-4,
Set
the
minutes
by
rotating
the
TIME/WEIGHT
knob.
4-5,
Start
the
clock
by
pressing
the
CLOCK
setting
button.
NOTE:
.
{f
you
do
not
want
to
set
the
clock,
press
the
STOP
button
once
after
Janguage
is
chosen."
:
"
will
appear
on
the
display.
When
the
operation
of
the
oven
is
finished,
"
:
"will
appear
on
the
display
instead
of
the
time
of
day.
_
The
oven
can
be
also
used
when
the
language
and/or
the
clock
is
not
set..
|
3.
When
the
oven
door
is
opened,
the
oven
lamp
comes
on at this time.
ICROWAVE
COOKING
CONDITION
JIGH COOKING
Enter
a
desired
cooking
time
by
turning
the
TIME/WEIGHT
(nob
and
start
the
oven
by
pressing
START
button.
ow
Function sequence Figure O-2 on page 33
CONNECTED
COMPONENTS
RELAY
Oven
lamp,
Turntable
motor
RY1
High
voltage
transformer
RY1+
Grill
heating
element
RY1+
Botiom
heating
element
RY
1+
Fan
motor,
RY5
tL
I
|.
The
line
voltage
is
supplied
to
the
primary
winding
of
the
high
voltage
transformer.
The
voltage
is
converted
to
about
3.3
volts
A.C.
output
on
the
filament
winding
and
high
voltage
of
approximately
2000
volts
A.C.
on
the
secondary
winding.
2,
The
filament
winding
voltage
(3.3
volts}
heats
the
magnetron
filament
and
the
high
voltage
(2000
volts)
is
sent
to
the
voltage
doubling
circuit,
where
it
is
doubled
to
negative
voltage
of
approximately
4000
volts
D.C..
3.
The
2450
MHz
microwave
energy
produced
in
the
magnetron
generates
a
wave
length
of
12.24
cm.
This
energy
is
channelled
through
the
waveguide
(transport
channel)
into
the
oven
cavity,
where
the
food
is
placed
to
be
cooked.
.
4,
When
the
cooking
time
is
up,
a
signal
tone
is
heard
and
ihe
relays
RY1_
+
RY2
+
RY5
go
back
to
their
home
position.
The
circuits
to
the
oven
lamp,
high
voltage
transformer,
fan
motor
and
turntable
motor
are
cut
off.
5.
When
the
oven
door
is
opened
during
a
cooking
cycle,
the
switches
come
to
the
following
condition.
.
witch
ontact
ondition
During
Oven
Door
Cookin
Open(No
cooking)
Primary
latch
Switch
COM-NO
Closed
Opened
Stop
switch
COM-NO
Closed
Opened
Monitor
Switch
COM-NO
Closed
Opened
COM-NC
Opened
Closed
The
circuit
to
the
high
voltage
transformer,
fan
motor
and
turntable
motor
are
cut
off
when
the
primary
latch
switch
and
stop
switch
are
made
open.
The
oven
lamp
remains
on
even
if
the
oven
door
is
opened
after
the
cooking
cycle
has
been
interrupted,
because
the
relay
RY1
stay
closed.
Shown
in
the
display
is
remaining
time.
6. MONITOR SWITCH CIRCUIT
The
monitor
switch
SW3
is
mechanically
controlled
by
the
oven
door,
and
monitors
the
operation
of
the
primary
latch
switch
SW14.
6-1.
When
the
oven
door
is
opened
during
or
after
the
cycle
of
a
cooking
program,
the
primary
latch
switch
SW1
and
stop
switch
SW2
must
open
their
contacts
first.
After
that
the
contacts
(COM-NC)
of
the
monitor
switch
SW3
can
be
closed.
6-2.
When
the
oven
door
is
closed,
the
contacts
(COM-
NC)
of
the
monitor
switch
SW3
must
be
opened.
After
that
the
contacts
of
the
primary
latch
switch
SW1
and
the
stop
switch
SW2
are
closed.
6-3.
When
the
oven
door
is
opened
and
the
contacts
of
the
primary
latch
switch
SW1
remain
closed,
the
fuse
F2
F8A
will
blow,
because
the
monitor
switch
is
closed
and
a
short
circuit
is
caused.
MEDIUM
HIGH,
MEDIUM,
MEDIUM
LOW,
LOW
COOKING
|
When
the
microwave
oven
is
preset
for
variable
cooking
power,
the
line
voltage
is
supplied
to
the
high
voltage
transformer
intermittently
within
a
32-second
time
base
through
the
relay
contact
which
is
coupled
with
the
cur-
rent-limiting
relay
RY2.
The
following
levels
of
microwave
power
are
given.
42 sec, ON
SETTING 100% EINE Approx. 100%
24 sec. ON 6B sec, OFF
70%
Approx,
70%
1B sec. ON 44 sec. OFF
50% Approx. 50%
12 sec, ON 20 sec, OFF
30% Approx. 30%
6 sec. ON 26 sec, OFF
10% Approx. 10%
Note:
The
On/Offtime
ratio
does
not
exactly
correspond
to
the
percentage
of
microwave
power,
because
approx.
3
seconds
are
needed
for
heating
up
the
magnetron
filament.
R-771 - 9

GRILL
COOKING
CONDITION
The
oven
has
three
grill
cooking
conditions.
They
are
the
TOP
GRILL
mode,
BOTTOM
HEATER
mode
and
TOP
AND
BOTTOM
mode.
TOP
GRILL
MODE
In
this
mode,
the
food
is
cooked
by
the
grill
heating
elements
(top
grill).
Enter
the
cooking
time
by
rotating
the
TIMEWEIGHT
knob
and
select
the
TOP
GRILL
mode
by
rotating
the
mode
select
knob.
When
the
START
button
is
pressed,
the
following
operations
occur:
Figure
O-3(a)
on
page
33
.
The
relay
RY1
+
RY3
+
RY5
are
energized.
2.
Thenumbers
of
the
digital
readout
start
the
count
down
to
zero.
3,
Then
the
grill
heating
elements
(top),
turntable
motor,
oven
lamp
and
fan
motor
are
energized.
4,
Now,
the
food
is
grilled
by
the
grill
heating
elements.
5.
Upon
completion
of
the
selected
cooking
time,
audible
signal
sounds
and
the
contacts
of
relays
RY1
+
RY3
are
opened,
then
the
grill
heating
elements
(top),
turntable
motor
and
oven
lamp
are
de-energized.
6.
Therelay
RY5
stays
closed
for
five
(5)
minutes,
and
the
fan
motor
operates.
BOTTOM
HEATER
MODE
In
this
mode,
the
food
is
cooked
by
the
bottom
heating
element.
Enter
the
cooking
time
by
rotating
the
TIME/
WEIGHT.
knob
and
select
the
BOTTOM
HEATER
mode
by
rotating
the
mode
select
knob.
When
the
START
button
is
pressed,
the
following
operations
occur:
—_t
Figure
0-3(b)
on
page
34
1.
The
relay
RY1
+
RY4+
RY5
are
energized.
2.
Thenumbers
ofthe
digital
readout
start
the
count
down
{oO
zero.
3.
Then
the
bottom
heating
element,
turntable
motor,
oven
lamp
and
fan
motor
are
energized.
4,
Now,
the
food
is
grilled
by
the
bottom
heating
element.
5.
Upon
completion
of
the
selected
cooking
time,
audible
signal
sounds
and
the
contacts
of
relays
BY1
+
RY4
are
opened,
then
the
bottom
heating
elements,
turnta-
ble
motor
and
oven
lamp
are
de-energized.
-
6.
Therelay
RY5
stays
closed
for
five
(5)
minutes,
andthe
fan
motor
operates.
TOP
AND
BOTTOM
MODE
NE
In
this
mode,
the
food
is
cooked
by
both
the
grill
heating
elements
(top
grill)
and
bottom
heating
elemeni.
Enter
the
cooking
time
by
rotating
the
TIME/WEIGHT
knob
and
selectthe
TOP
AND
BOTTOM
mode
by
rotating
the
mode
select
knob.
When
the
START
button
is
pressed,
the
following
operations
occur:
Figure
0-3(c)
on
page
34
.
The
relay
RY1
+
RY3
+
RY4
+
RYS
are
energized.
2.
The
numbers
ofthe
digital
readout
start
the
count
down
to
zero.
3,
Then
the
grill
heating
elements
(top),
bottom
heating
element,
turntable
motor,
oven
lamp
and
fan
motor
are
energized.
4.
Now,
the
food
is
grilled
by
the
grill
heating
elements
(top)
and
the
bottom
heating
element.
5.
Upon
completion
ofthe
selected
cooking
time,
audible
signal
sounds
and
the
contacts
of
relays
RY1
+
RY3
+
th
RY4
are
opened,
then
the
grill
heating
elements
(top),
bottom
heating
element,
turntable
motor
and
oven
lamp
are
de-energized.
6.
The
relay
RY5
stays
closed
for
five
(5)
minutes,
and
the
@
fan motor operates.
DUAL
COOKING
CONDITION
The
oven
has
two
dual
cooking
mode.
One
is
MICRO-
WAVE
AND
TOP
GRILL
mode
and
other
one
is
MICRO-
WAVE
AND
BOTTOM
HEATER
mode.
In
both
modes,
the
relay
RY2
operaies
intermittently
with
in
a
48
seconds
time
base
as
shown
below.
Power
level!
ON
time
OFF
time
100%
48
sec.
0
sec.
70%
36
sec.
12
sec
50%
26
sec.
22
sec.
30%
16
sec.
32
sec
10%
8
sec.
40
sec
Power
level
0%
can
not
be
programmed
in
Dual
Cooking
condition.
MICROWAVE
AND
TOP
GRILL
MODE
NSA
A
————————o
inthis
mode,
the
food
is
cooked
by
microwave
and
the
grill
heating
elements
(top).
Enter
the
cooking
time
by
rotating
the
TIME/WEIGHT
knob
and
select
the
MICROWAVE
AND TOP
GRILL
mode
by
rotating
the
mode
select
knob.
And
select
the
power
level
by
pressing
the
MICROWAVE
power
button.
When
the
START
button
is
pressed,
the
following
operations
occur:
4.
The
relay
RY1
+
RY2
+
RY3
+
RY5
are
energized.
©.
Thenumbers
ofthe
digital
readout
start
the
countdown
to zero.
3.
The
grill
heating
element
(top),
high
voltage
trans-
dis:
former,
turntable
motor,
oven
lamp
and
fan
motor
are
energized.
4.
Now,
the
food
is
cooked
by
the
microwave
and
grill
heating
element
(top).
5.
Upon
completion
of
the
selected
cooking
time,
audible
signal
sounds
and
the
contacts
of
relays
BY1+RY2
+
RY3
are
opened,
then
the
grill
heating
element
(top),
high
voltage
transformer,
turntable
motor
and
oven
lamp
are
de-energized.
6.
Therelay
RY5
stays
closed
for
five
(5)
minutes,
and
the
fan
motor
operates.
MICROWAVE
AND
BOTTOM
HEATER
MODE
MCROWAVE
A
—e—eEeeE—E—EE——ee——_—_e
In
this
mode,
the
food
is
cooked
by
microwave
and
the
bottom
heating
element.
Enter
the
cooking
time
by
rotating
the
TIME/WEIGHT
knob
and
select
the
MICROWAVE
AND
BOTTOM
HEATER
mode
by
rotating
the
mode
select
knob.
And
select
the
power
level
by
pressing
the
MICROWAVE
power
button.
When
the
START
button
is
pressed,
the
following
operations
occur:
4.
The
relay
BY1
+
RY2
+
RY4
+
RY5
are
energized.
9
Thenumbers
ofthe
digital
readout
startthe
count
down
to
zero.
3.
The
bottom
heating
element,
high
voltage
transformer,
turntable
motor,
oven
lamp
and
fan
motor
are
ener-
gized.
4.
Now,
the
food
is
cooked
by
the
microwave
and
bottom
heating
element.
5.
Uponcompletion
of
the
selected
cooking
time,
audible
signal
sounds
and
the
contacts
of
relays
RY1+
RY2
+
RY4
are
opened,
then
the
bottom
heating
elements,
high
voltage
transformer,
turntable
motor
and
oven
lamp
are
de-energized.
R-771 - 10
@
SD
—_—_