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R-305BW
R-309BW
PROCEDURE
LETTER
the above method may be used (after clearing the control unit) to determine if the control unit or key
pad is at fault.
5. Reconnect all leads removed from components during testing.
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 function.
G 8
5
0
START
MINUTE
PLUS
POWER
LEVEL
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, control
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 function.
L
COMPU DEFROST TEST
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Close the door, touch the " COMPU DEFROST " pad twice and touch the Number pad "5". And then touch
the "START" pad.
(3) The oven is in Compu Defrost cooking condition.
(4) The oven will operate as follows.
MODEL
R-305BW
R-309BW
TEST PROCEDURES
G 7
G 6
G 5
G 4
G 3
2
1
3
4
9
8
7
6
Popcorn
COMPU
Fresh
Reheat
Beverage
DEFROST
Vegetable
Casserole
Fresh
TIMER
STOP
Baked
Roll /
Potato
CLOCK
CLEAR
Muffin
R-305BW
unit is defective.
OPERATIONAL VOLTAGE
RY1
Approx. 25.0V D.C.
RY2
Approx. 24.0V D.C.
1ST STAGE
WEIGHT
LEVEL
0.5lbs
70%
0.5lbs
70%
COMPONENT TEST
G 8
G 7
G 2
G 1
5
4
0
9
START
COMPU
MINUTE
DEFROST
PLUS
TIMER
POWER
LEVEL
CLOCK
CONNECTED COMPONENTS
Oven lamp / Turntable motor / Cooling fan motor
Power transformer
2ND STAGE
TIME
LEVEL
45sec.
50%
40sec.
40sec.
50%
38sec.
16
G 6
G 5
G 4
G 3
G 2
2
1
3
8
7
6
Popcorn
Fresh
Reheat
Dinner
Beverage
Vegetable
Casserole
Plate
Frozen
Fresh
STOP
Baked
Roll /
Roll /
Potato
CLEAR
Muffin
Muffin
R-309BW
3RD STAGE
TIME
LEVEL
TIME
30%
45sec.
30%
43sec.
G 1
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