R-25JT-F
30
2]. [JUDGMENT PROCEDURE FOR UPPER MAGNETRON AND ITS CIRCUIT]
Disconnect the power supply cord.
Disconnect lead wires to the interlock relay RY3 to avoid operation of lower magnetron circuit.
Reconnect power supply
Heating for one minute.
Temperature of the water increased?
*1
Yes
EE2 should be indicated.
Upper magnetron, its driving circuit and parts on the circuit are normal.
*1: CHECK OF TEMPERATURE RISE
Fill approx. 453 CC of water in a measuring cup and place it in the oven.
Operate the oven for one minute.
Substract cold water temperature from hot water temperature.
The result should be approx. 18 - 36F (10 - 20 deg. C).
3].
[JUDGMENT PROCEDURE FOR LOWER MAGNETRON AND ITS CIRCUIT]
Disconnect the power supply cord.
Disconnect lead wires to the interlock relay RY2 to avoid operation of lower magnetron circuit. Lead wires to the interlock
relay RY3 should be connected.
Reconnect power supply
Heating for one minute.
Temperature of the water increased?
*1
Yes
EE1 should be indicated.
Lower magnetron, its driving circuit and parts on the circuit are normal.
*1: CHECK OF TEMPERATURE RISE
Fill approx. 453 CC of water in a measuring cup and place it in the oven.
Operate the oven for one minute.
Substract cold water temperature from hot water temperature.
The result should be approx. 18 - 36F (10 - 20 deg.C).
If EE2 is indicated, carry out Test procedures A-J and find
out the defective part. Lower magnetron, its driving circuit
or any parts on its circuit may be defective.
No
If EE1 is indicated, carry out Test procedures A-J and find out
the defective part. Upper magnetron, its driving circuit or any
parts on its circuit may be defective.
No
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