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PROCEDURE
LETTER
6. Re-install the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
G 8
G 7
5
4
0
9
MINUTE
CHICKEN
PLUS
BREAST
FROZEN
STOP
ROLLS
CLEAR
MUFFINS
GROUND MEAT
(COMPU DEFROST)
Key Unit
K
RELAY 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. Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape.
6. After that procedure, re-connect the power supply cord.
7. Remove the outer case and check voltage between Pin No. 1 of the 2 pin connector (A) and the
common terminal of the relay RY1 on the control unit with an A.C. voltmeter.
The meter should indicate 120 volts, if not check oven circuit.
RY1 and RY2 Relay Test
These relays are operated by D.C. voltage
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated ............. Defective relay.
DC. voltage not indicated ........ Check diode which is connected to the relay coil. If diode is good,
RELAY SYMBOL
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 functions.
L
COMPU DEFROST TEST
WARNING : The oven should be fully assembled before following procedure.
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Close the door, touch the " steaks / chops " pad once.
(3) The oven is in Compu Defrost cooking condition.
(4) The oven will operate as follows
TEST PROCEDURES
G 6
G 5
G 4
3
2
1
8
7
6
KEEP WARM
TIMER
START
PLUS
CLOCK
FRESH
POWER
BEVERAGE
ROLLS
LEVEL
MUFFINS
CUSTOM
FRESH
REHEAT
SENSOR
HELP
VEGETABLES
control unit is defective.
OPERATIONAL VOLTAGE
RY1
Approx. 24.3V D.C.
RY2
Approx. 23.4.V D.C.
1ST STAGE
WEIGHT
LEVEL
TIME
0.5lb
60%
25sec.
COMPONENT TEST
G 3
G 2
G 1
CHICKEN
PIECES
STEAKS
BAKED
POPCORN
POTATOES
CHOPS
GROUND MEAT
RICE
(SENSOR COOK)
FISH
FROZEN
FROZEN
SEAFOOD
VEGETABLES
ENTREES
CONNECTED COMPONENTS
Oven lamp / Turntable motor / Cooling fan motor
Power transformer
2ND STAGE
LEVEL
TIME
40%
20sec.
17
R-420EK
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