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Daewoo KOR-804M - Page 25

Daewoo KOR-804M
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Refer
to
the
“WIRING
DIAGRAM”
on
page
23.
MICROWAVE
COOKING
TIME
COOKING
1.
When
the
food
is
placed
inside
the
oven
door
is
closed.
1)
The
low
voltage
transformer
supplies
the
necessary
voltage
to
the
touch
control
circuit
when
the
power
cord
is
plugged
in.
2)
The
contacts
of
the
interlock
monitor
switch
open.
This
switch
creates
short
circuit
to
below
8A
fuse
and
stop
magnetron
oscillation
when
door
is
opened
during
operation
under
abnormal
condition
(i.e.
both
the
contacts
of
primary
interlock
switch
do
not
open
the
circuit).
3)
The
contact
of
primary
interlock
switch
close
the
primary
circuit.
2.
When
cooking
cycle,
power
and
time
are
set
by
touching
the
function
pads
and
the
desired
numerical
pads.
1)
Cooking
the
function
indicating
bar
located
on
the
digital
light
to
indicate
that
function
have
been
set.
2)
The
time
you
set
appears
in
the
display
window.
3)
The
touch
control
circuit
memorizes
the
cooking
program
you
set.
3.
When
the
start
pad
is
touched.
*
The
RELAY
‘1”
and
‘2’
are
controlled
by
the
touch
control
circuit.
1)
230VAC
is
applied
to
the
high
voltage
transformer
through
the
contacts
of
RELAY
“1”
(See
page
23)
2)
Fan
motor
starts
rotating
and
cools
the
magnetron
by
blowing
the
air
coming
from
the
intake
on
.
the
rear
back
hole.
3)
The
oven
lamp
lights
the
inside
of
the
oven.
4)
Indicator
light
turns
on
to
indicate
function
operation.
Cooking
time
starts
count
down.
5)
3.3
Volts
AC
is
generated
from
the
filament
winding
of
the
high
voltage
transformer.
This
filament
voltage
is
applied
to
the
magnetron
to
heat
the
magnetron
filament
through
two
noise
preventing
choke
coils.
6)
A
high
voltage
of
2000
Volts
AC
is
generated
in
the
secondary
of
high
voltage
transformer
and
this
secondary
voltage
is
increased
by
the
action
of
the
diode
and
the
charging
of
the
high
voltage
capacitor.
This
resultant
DC
voltage
is
then
applied
to
the
anode
of
the
magnetron.
As
shown
in
Fig.
2
the
first
half
cycle
of
the
high
voltage
produced
in
the
high
voltage
transformer
secondary
charges
the
high
voltage
capacitor.
Current
flow
is
in
the
direction
of
the
dotted-line
during
the
second
half
cycle,
the
voltage
produced
by
the
transformer
secondary,
and
the
charge
of
the
high
voltage
capacitor
are
combined
and
applied
to
the
magnetron
as
shown
by
the
solid
line
so
that
oscillations
begins.
The
disturbance
wave
generated
by
the
magnetron
is
prevented
by
the
choke
coils
filter
capacitors
and
the
magnetron’s
shielded
case
so
that
TV
and
Radio
programs
are
not
impaired
by
noise.
24

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