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Troubleshooting
PROCEDURE
LETTER
RELAY SYMBOL OPERATIONAL VOLTAGE
RY1
RY2
RY3
RY4
RY5
8.
Disconnect the power supply cord, and then remove outer case.
9.
Open the door and block it open.
10.
Discharge high voltage capacitor.
11.
Reconnect all leads removed from components during testing.
12.
Re-install the outer case (cabinet).
13.
Reconnect the power supply cord after the outer case is installed.
14.
Run the oven and check all function.
D
DEFROST TEST
WARNING:
1.
Place one cup of water in the center of the tray in the oven cavity.
2.
Close the drawer, touch the Defrost pad. Then select Steaks/Chops by touching the number pad
2. And touch the number pad 5. (Now, weight 0.5lb is set.) And then touch the start pad.
3.
The oven is in Defrost cooking condition.
4.
The oven will operate as follows:
WEIGHT
0.5 lb
5.
If improper operation is indicated, the control unit is probably defective and should be checked.
E
PROCEDURES TO BE TAKEN WHEN THE FUSE ON THE PRINTED WIRING BOARD (PWB) IS OPEN
To protect the electronic circuits, this model is provided with a fuse added to the primary on the PWB.
1.
Fuse check and repairs.
1)
Disconnect the power supply cord.
2)
Remove the outer case cabinet.
3)
Open the door and block it open.
4)
Discharge high voltage capacitor.
5)
If the Fuse is blown, replace power unit.
6)
Make a visual inspection of the varistor. Check for burned damage. If the varistor has been
burned, replace the power unit.
7)
Examine the touch control transformer with a tester for the presence of layer short-circuit
(check the primary coil resistance which is approximately 151.6Ÿ ± 10%). If any abnormal
condition is detected, replace the touch control transformer.
8)
Reconnect all leads removed from components during testing.
9)
Re-install the outer case (cabinet).
10)
Reconnect the power supply cord after the outer case is installed.
11)
Run the oven and check all functions.
2.
Follow the troubleshooting guide given below, if indicator does not light up after above check and
repairs are ¿ nished.
1)
Disconnect the power supply cord.
2)
Remove the outer case cabinet.
3)
Open the door and block it open.
4)
Discharge high voltage capacitor.
Drawer Microwave
TEST PROCEDURES
Approx. 26 vdc
Approx. 25 vdc
Approx. 26 vdc
Approx. 26 vdc
Approx. 26 vdc
The oven should be fully assembled before following procedure.
1ST STAGE
2ND STAGE
LEVEL
TIME
LEVEL
60%
20 sec.
40%
COMPONENT TEST
CONNECTED COMPONENTS
Oven lamp / Common
Power transformer
Stirred motor
Fan motor
Switching regulator or drawer motor
3RD STAGE
TIME
LEVEL
20 sec.
30%
6-6
TIME
45 sec.
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