Sharp CAROUSEL R-530EK Manual de servicio - Página 19
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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 functions.
K
RELAY TEST
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
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 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 Defrost Center pad and touch the number pad 5. And touch the number
pad 5 again. And then touch the Start pad.
(3) The oven is in Defrost Center cooking condition.
(4) The oven will operate as follows.
TEST PROCEDURES
COMPONENT TEST
G 1
G 2
G 3
G 4
Beverage
Center
Fresh
From the
Rice
vegetables
Pantry
Ground
Start
Poultry
meat
Touch On
Fish
Vegetables
Entrees
Breakfast
Seafood
Defrost
Center
is good, control unit is defective.
OPERATIONAL VOLTAGE
Approx. 24.0V D.C.
Approx. 23.0V D.C.
17
G 5
G 6
G 7
1
2
3
4
6
7
8
9
Keep
Timer
Snacks
Warm
Clock
Plus
Stop
Power
Lunch
Level
Clear
Custom
Baked
Sensor
Help
potatoes
reheat
CONNECTED COMPONENTS
Oven lamp / Turntable motor / Cooling fan motor
Power transformer
R - 5 3 0 E K
R- 530EW
G 8
G 9
5
G10
0
Minute
G11
Plus
15
G12
Minute
Recipes
G13
Popcorn
G14