Sharp R-508CK Service Manual page 18

R - 50 8 C K
R - 5 10 C K
R -5 10C W
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.
G 9
G10
G11
G12
G13
G14
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 " COMPU DEFROST " pad twice.
(3) Touch the Number pad " 5 " and then touch the " START " pad.
(4) The oven is in Compu Defrost cooking condition.
(5) The oven will operate as follows
TEST PROCEDURES
G 8 G 7 G 6 G 5 G 4
3 2 1
5 4
0 9 8 7 6
Frozen Power
Casserole
Popcorn START
Entrees Level
Stop Baked
Beverage
potatoes
Clear
R-508CK
OPERATIONAL VOLTAGE
RY1 Approx. 11.8V D.C.
RY2 Approx. 10.7V D.C.
1ST STAGE
WEIGHT
LEVEL
0.5lb 60%
COMPONENT TEST
G 3 G 2 G 1
MINUTE Rolls/
PLUS G 9
Muffins
Fresh
G10
Vegetables
Timer
COMPU Dinner
Frozen
G11
Clock DEFROST
Plate
entrees
Frozen
Vegetables G12
BEVERAGE
G13
G14
control unit is defective.
Oven lamp / Turntable motor / Cooling fan motor
Power transforme
2ND STAGE
TIME LEVEL TIME
47sec. 40% 37sec.
16
G 8 G 7 G 6 G 5 G 4
MINUTE
2 1
5 3
4
0 9 8 7 6
vegetables
Power
Casserole POPCORN START
Level
Stop
Baked
Clear potatoes vegetables
R-510CK/CW
CONNECTED COMPONENTS
G 3 G 2 G 1
Rolls/
PLUS muffins
Fresh Microwave
pizza
Timer COMPU Dinner
Clock DEFROST Plate
Frozen
Ground
meat