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d) After approximately 3 seconds, the display shows "X X. X X " which is the time for detecting moisture.
If the above is not the case, the control unit is probably defective.
If the above is proper, the humidity sensor is probably defective.
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,R2:22Ω±1% 1/2W
R3:4.3kΩ±?5% 1/4W
R4:1MΩ±5% 1/4W
[17] Q: NOISE FILTER TEST
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 leads to the primary of the power transformer.
5. Using an ohmmeter, check between the terminals as described in the following table.
MEASURING POINT
Between N and H
Between terminal N and LOAD
Between terminal L and LOAD
If incorrect readings are obtained, replace the noise filter.
6. Reconnect all leads removed from components during testing.
7. Reinstall the outer case (cabinet).
8. Reconnect the power supply cord after the outer case is installed.
9. Run the oven and check all functions.
F-1
F-2
F-3
Sensor Dummy Resistor Circuit
INDICATION OF OHMMETER
Approx. 470 KΩ
Short circuit.
Short circuit.
To connector (F)
on Control Unit.
1
2
R1
3
R2
CONNECTOR
8 – 9
Page 24
GLBM188HB
Plunger
COM
NO
COM
NC
R3
R4
NOISE FILTER
N
RESISTOR
MONITOR
470 K
FUSE
LINE CROSS CAPACITOR
NOISE SUPPRESSION COIL
LINE BYPASS
LINE BYPASS
CAPACITOR
CAPACITOR
0.0033μF / 250V
0.0033μF / 250V
LOAD
NC
NO
H
LOAD
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Troubleshooting
