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2.SPECIFICATIONS
Microwave output ................ 1,800W to 180W
Frequency ........................... 2,450MHz
Power supply ....................... 208V, 60Hz
Rated current ...................... 13 Amp.
Safety Device ......................
Thermal protector(Magnetron) 150°C(270°F)Open
(Thermostat) 80°C(144°F)Close
Thermistor (Magnetron) 200°C(360°F) Open
108°C(194°F)Close
Thermistor(Duct)................120°C(216°F) Open
Fuse (Cartridge Type) ................. 250V 10A
Micro switch, Relay
Interlock Switch
Interlock monitor Switch
Door sensing Switch and
Relay RL-3 and 4
Max. input time .................... Electronic Digital, up to
Manual 10min./Memory 30min.
Overall Dimensions ........ 422(W)x540(D)x335(H) mm
Oven cavity size ............ 330(W)x330(D)x230(H) mm
Effective Capacity of Oven Cavity.........19.1liters
Net weight ........................... 32Kg
3. POWER OUTPUT MEASUREMENT
A. SINCE NEARLY 4,000 VOLTS EXISTS IN SOME
CIRCUITS OF THIS MICROWAVE OVEN, RE-
PAIRS SHOULD BE CARRIED OUT WITH
GREAT CARE.
B. TO AVOID POSSIBLE EXPOSURE TO MICRO-
WAVE ENERGY LEAKAGE, THE FOLLOWING
PRECATIONS MUST BE TAKEN BEFORE SER-
VICING.
(1) Before the power is applied.
(a) Open and close door several times to make
sure the interlock switch, door sensing switch
and interlock monitor switch operate properly.
(Listen for the clicking sound from switches.)
Make sure the interlock monitor switch is
closed after the interlock switch and door sens-
ing are open 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 leak-
age detector and confirm the energy leakage
is below 5mW/cm
2
(3) Do not operate the unit until it is completely
repaired of any of the following conditions.
(a) Door is not closed firmly against the cavity
front.
(b) The hinge is broken.
(c) The choke dielectric or the door seal is dam-
aged.
(d) The door is bent or warped, or there is any
other visible damage to the oven that may
cause microwave energy leakage.
Note: Always keep the seal clean.
(e) Make sure 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 wave guide).
(4) The following items should be checked after
the unit is repaired.
(a) The interlock monitor switch is connected cor-
rectly 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 the time is up.
The oven must not be operated with any of the above
components removed or bypassed.
NOTE: The power output specification, 1800W on this
model is measured with IEC measurement. The power
output is measured with two(2) liters water is equiva-
lent to 1800W in measurement with IEC, when mea-
sured with the following power output.
(1)1. Fill two beakers, one liter of tap water respec-
tively
2. Use an accurate thermometer and measure each
water temperature respectively.
(2) Place beakers side by side in center of the
ceramic tray.
(3) Close the door,set the “TIME” for two minutes.
Touch the “START” key and heat the water for
exactly two minutes.
(4)Take the beakers out, immediately stir the water
and measure the water temperatures respectively.
(5) Calculate the temperature rise of water in each
beaker. Then calculate the average value of the two
temperature rises.(
Ģ
t)
(6) The teperature rise shall be in the following range;
Average Temp. Rise
Minimum 23.1°C
Maximum 28.3°C
Power output is affected by the line voltage under load.
(7) For correct Power output measurement, the line
voltage under load must be 208±2Volts.
4.PRECATIONS AND REPAIR SERVICE TIPS
PRELIMINARY