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NOTE:
If the interlock
monitor
circuit operates
and at the
same
time the fuse blows
with
the door opened,
be
sure
to
replace
the
control
circuit
board
because
relay
2 on the control
circuit
board,
the
door sensing
switch
and the electric
circuit related
on
the
door
sensing
switch,
which
act
as
Secondary
Interlock
Switch.
2, SPECIFICATIONS
Rated Power Consumption
.. 1100W
Microwave
Output ................ 700W
(Adjustable
100 W
7001W)
Frequency
..............................
Power Supply ........................
Rated Current
........................
Safety Devices
......................
Timer ............... .......................
Overall
Dimensions
..............
Oven Cavity Size ...................
Turn Table
Diameter
............
Effective
Capacity
of Oven
Cavity ................. ................ ....
Net Weight
........ ....................
2,450 MHz*50MHz
240V, 50Hz
5.0 Amp.
through
Thermal
Protector,
Open
at 135° C for Cavity
Thermal
Protector,
Open
at 100" C for Manetron
Fuse (Cartridge
Type
8A)
Primary
Interlock
Switch
Door
Sensing
Switch
and
Relay 2
Interlock
Monitor
Switch
Electronic
Digital,
up
to
99 min. 99 sec.
461( W)x340(D)x247(H)mm
293( W)x305(D)x190(H)mm
275mm
17 liters
Approx.
12.5Kg
3. POWER
OUTPUT
MEASUREMENT
(1)
(2)
(3)
Prepare
1000*5g
tap water.
Adjust water temperature
to 10 °f20C.
Pour
water
into
a container
made
of borosilicate
glass,
190mm
outer
diameter
cylinder,
maximum
3mm thickness.
Note:
Use the container
kept on the room tempera-
ture.
(4) Place the container
in the center of oven cavity.
(5)
Set the heating
time for 60 seconds
and rating full
power and then start oven.
(6)
Take
the container
out immediately
when
heating
time is up.
(7)
Stir water for making
even water temperature
in the
container.
(8)
Measure
water temperature.
Water
temperature
rise shall be 8° to 12" C.
4. PRECAUTIONS
AND
REPAIR
SERVICE
TIPS
PRELIMINARY
A. SINCE NEARLY 4,000 VOLTS EXISTS
IN SOME
CIR-
CUITS
OF
THIS
MICROWAVE
OVEN,
REPAIRS
SHOULD
BE CARRIED
OUT WITH
GREAT CARE.
B. TO AVOID
POSSIBLE
EXPOSURE
TO MICROWAVE
ENERGY
LEAKAGE,
THE
FOLLOWING
PRECAU-
TIONS
MUST
BE TAKEN
BEFORE SERVICING.
(1) Before the power
is applied.
(a) Open
and
close
door
several
times
to make
sure
the primary
interlock
switch,
the interlock
monitor
switch
and
the door
sensing
switch
operate
proP-
erly. (Listen for the clicking
sound fromthe
switch-
es. ) Make
sure the interlock
monitor
switch closes
after the prima~
interlock switch is opens when
the
door is opened.
(See pages 1 and 6)
(b) Make
sure
the
perforated
screen
and
the
choke
dielectric
of the door are correctly
mounted.
(2) After
the power is applied:
(a) Open
and close the
door
to see if the
interlock
mechanism
operates properly.
(b) Check
microwave
energy
leakage
with
a leakage
detector
and confirm
the energy
leakage is below 5
mW/cm2.
(3)
Do
not operate
the unit
until
it is completely
re-
paired,
if any of the following
conditions
exists.
(a) Door does not close firmaly
against the cavity front.
(b) The hinge is brbken.
(c) The choke dielectric
or the door seal is damaged.
(d) The door
is bent or warped,
or there
is any other
visible damage
to the oven that
may cause micro-
wave energy leakage.
NOTE:
Always
keep the seal clean.
(e) Make
su'e that
there
are no defective
parts in the
interlock
mechanism.
(f)
Make
sure that
there
are no defective
parts in the
microwave
generating
and
transmission
assembly.
(especially
waveguide).
(4)
The
following
items
should
be checked
after
the
unit is repaired:
(a) The interlock
monitor
switch is connected
correctly
and firmly.
(b) The magnetron
gasket on the magnetron
is properly
positioned.
(c) Waveguide
and oven cavity
are intact
(no leakage of
microwave
energy).
(d) The
door
can be properly
closed
and
the
safety
switches work properly.
(e) The oven must be stopped when the door is opened
or time is up.
The oven must not be operated
with
any of the above
components
removed or bypassed.
–2–
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