Sharp R-330DK Service Manual page 19

PROCEDURE
LETTER
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 functions.
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 unit is defective.
RELAY SYMBOL
RY1
RY2
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
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 Compu Defrost pad three times 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
TEST PROCEDURES
COMPONENT TEST
G 8 G 7
5
G 9
0
G10
Minute Frozen
G11
Plus snacks
Stop
One Dish
G12
Clear
Dinners
Sensor
G13 Popcorn
reheat
G14
OPERATIONAL VOLTAGE
Approx. 24.0V D.C.
Approx. 23.0V D.C.
17
G 6 G 5 G 4
Beverage
2 1
3
4
9 8 7 6
Kitchen Start
Clock
Timer
Touch On
Lunch on Power Breakfast
Level Bar
the Run
Baked Custom
Super
potatoes
Help Defrost
CONNECTED COMPONENTS
Oven lamp / Turntable motor / Cooling fan motor
Power transformer
R -330DK
R-330DW
G 3 G 2 G 1
center
Compu Fresh
Rice
vegetables
Defrost
Ground
Poultry
meat
Fish/ Frozen Frozen
seafood vegetables entrees