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R - 326FS

PROCEDURE

LETTER

If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation

below.

(1) Disconnect the power supply cord, and then remove outer case.

(2) Open the door and block it open.

(3) Discharge high voltage capacitor.

(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) Disconnect the leads to the primary of the power transformer.

(7) Ensure that these leads remain isolated from other components and oven chassis by using insulation

tape.

(8) After that procedure, re-connect the power supply cord.

(9) Check the sensor cook operation proceed as follows:

9-1. Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice, the START pad once and

9-3. After approximately 25 seconds, push plunger of select switch for more than 3 seconds. This

9-4. After approximately 3 seconds, the display shows " X X . X X " which is the time for detecting

(10) Disconnect the power supply cord, and then remove outer case.

(11) Open the door and block it open.

(12) Discharge high voltage capacitor.

(13) Disconnect the dummy resistor circuit from the sensor connector of control panel.

(14) Carry out necessary repair.

(15) Reconnect all leads removed from components during testing and repairing.

(16) Re-install the outer case (cabinet).

(17) Reconnect the power supply cord after the outer case is installed. Run the oven and check all

functions.

(18) Carry out "Water load cooking test" again and ensure that the oven works properly.

R1, R2 :

R3 : 4.3k

R4 :

TEST PROCEDURES

the number pads 1 once and the number pad 4.

9-2. The control panel is in the sensor cooking operation.

condition is same as judgement by AH sensor.

moisture.

If the above is not the case, the control unit is probably defective.

If the above is proper, the AH sensor is probably defective.

Ω

± 1% 1/2W

Ω

± 5% 1/4W

Ω

± 5% 1/4W

To connector (F)

on Control Unit.

F-1

F-2

F-3

CONNECTOR

Sensor Dummy Resistor Circuit

COMPONENT TEST

CHECKING CONTROL UNIT

Plunger

COM