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PROCEDURE
LETTER
6-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
6-2. Place the container on the center of tray in the oven cavity.
6-3. Close the door.
6-4. Touch REHEAT SENSOR pad five times and touch the INSTANT COOK/START pad.
6-5. The control panel is in automatic Sensor operation.
6-6. The display will start to count down the remaining cooking time, and the oven will turn off
automatically after the water is boiling (bubling).
If new sensor dose not operate properly, the problem is with the control unit.
NOTE : When the following test is carried out, all connectors should be connected to the control unit.
(1) Disconnect oven from power supply and remove outer case.
(2) Discharge the high voltage capacitor.
(3) Disconnect the wire leads from the cook relay.
(4) Disconnect the sensor connector that is mounted to control panel.
(5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6) Reconnect the oven to the power supply and check the sensor cook operation, proceed as follows:
6-1. Touch REHEAT SENSOR pad five times and touch the INSTANT COOK/START pad.
6-2. The control panel is in the sensor cooking operation.
6-3. After approximately 20 seconds, push plunger of select switch. This condition is same as
judgement by AH sensor.
6-4. After approximately 3 seconds, cooking operation turns off, an audible signal will sound.
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
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WEIGHT SENSOR ASSEMBLY AND IC3(MEMORY) TEST
After replacing the weight sensor or IC3, carry out the following procedure in order to calibrate the
weight sensor. If the weight sensor is not recalibrate, the food may be over or under cooked.
The following procedure should be carried out with microwave oven in a fully assembled condition
(with outer case fitted).
1.
Place the turnrable on the turntable support plate correctly, and close the door.
2.
Plug the oven into a power point. ("88:88" will appear on the display.)
3.
After 3 seconds or more, Press the STOP/CLEAR pad. (Display shows " : " with sound of
buzzer.)
4.
Press the CLOCK pad. (Display shows "ENTER TIME" with sound of buzzer.)
5.
Press the POWER LEVEL pad twice. (Display shows "ENTER TIME".)
6.
Press the INSTANT COOK/START pad. (Display shows "TEST" with sound of buzzer.)
7.
Press the "4" of number pads. (Display shows "DISH" with sound of buzzer, and tuntable and
oven lamps come on.)
8.
After 13 seconds, make sure that the display shows "25000 - 35000" with sound of buzzer.
If display shows less than 25000 or more than 35000, weight sensor is defect.
Place the weight 2 Kg ± 20g (water load 2 Kg ± 20g) on the turntable.
9.
10. Press the "6" of number pads. (Display shows " DISH" with sound of buzzer, and turntable and
oven lamps come on.)
11. After 13 seconds, make sure that the display shows "01800 - 03200" with sound of buzzer.
If display shows less than 01800 or more than 03200, weight sensor is defect.
12. Place the weight 2 Kg ± 20g (water load 2 Kg ± 20g) on the turntable.
TEST PROCEDURES
CHECKING CONTROL UNIT
R1,R2 : 22Ω ± 1% 1/2W
To connector (F)
on Control Unit.
1
F-1
2
F-2
3
F-3
CONNECTOR
Sensor Dummy Resistor Circuit
COMPONENT TEST
R3 : 10kΩ ± 5% 1/4W
R4 : 1MΩ ± 5% 1/4W
R1
R3
R4
R2
21
Plunger
NC
NO
COM
COM NO
NC
R-995J
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