Service manual

DMO2420B

DMO2420R

DMO2420S

The time of supplementary cooking is determined by experi-

ment with each food category and inputted into the LSI.

An example of how sensor works: (POTATOES)

1. Potatoes at room temperature. Vapor is emitted very

slowly.

2. Heat Potatoes. Moisture and humidity is emitted rapidly.

You can smell the aroma as it cooks.

3. Sensor detects moisture and humidity and calculates

cooking time and variable power.

Cooking Sequence.

1. Touch one of the SENSOR pads and then touch the Start

pad.

NOTE: The oven should not be operated on SENSOR

immediately after plugging in the unit. Wait two

minutes before cooking on SENSOR.

2. The coil of shut-off relay (RY-1) is energized, the turntable

motor, oven lamp and cooling fan motor are turned on,

but the power transformer is not turned on.

3. After about 16 seconds, the cook relay (RY-2) is energized.

The power transformer is turned on, microwave energy

is produced and first stage is started.

The 16 seconds is the cooling time required to remove

any vapor from the oven cavity and sensor.

NOTE: During this first stage, do not open the door or touch

STOP/CLEAR pad.

4. When the sensor detects the vapor emitted from the

food, the display switches over to the remaining cooking

time and the timer counts down to zero.

At this time, the door may be opened to stir, turn, or

season food.

5. When the timer reaches zero, an audible signal sounds.

The shut-off relay and cook relay are de-energized and

the power transformer, oven lamp, etc. are turned off.

6. Opening the door or touching the STOP/CLEAR pad, the

time of day will reappear on the display and the oven will

revert to an OFF condition.

MICROWAVE

AH SENSOR