Sharp Carousel R-1200 서비스 매뉴얼 - 페이지 18

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Sharp Carousel R-1200 서비스 매뉴얼
R-1200
R-1201
PROCEDURE
LETTER
L
RELAY TEST
1. Disconnect the power supply cord, and then remove outer case. Refer to procedure of " REMOVAL
OF OVEN FROM WALL " and " OUTER CASE REMOVAL ".
2. Open the door and block it open.
3. To discharge high voltage capacitor, wait for 60 seconds.
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. Check voltage between normal open terminal of the relay RY2 and the normal open 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, RY2, RY3 and RY4 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
RELAY SYMBOL
RY1
RY2(COOK)
RY3
RY4
8. Disconnect the power supply cord.
9. Open the door and block it open.
10. To discharge high voltage capacitor, wait for 60 seconds.
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.
M
DEFROST CENTER TEST
(1) Open the door.
(2) Place one cup of water in the center of the turntable tray in the oven cavity.
(3) Close the door.
(4) Touch the " DEFROST CENTER " pad. And touch the number pad 2. Then touch the number pad
5.
(5) Touch the " START " pad.
(6) The oven is in Defrost center cooking condition.
(7) The oven will operate as follows.
TEST PROCEDURES
COMPONENT TEST
G 8
G 7
G 6
5
4
3
0
9
8
FROZEN
FRESH
FROZEN
VEGETABLES
VEGETABLES
ENTREES
BAKED
GROUND
RICE
POTATOES
MEAT
OPERATIONAL VOLTAGE
Approx. -27.9V D.C.
Approx. -26.9V D.C.
Approx. -27.9V D.C.
Approx. -27.9V D.C.
16
G 5
G 4
G 3
POWER
2
1
LEVEL
STOP
7
6
CLEAR
HOT
DEFROST
TASK
WATER
CENTER
LIGHT
REHEAT
KEEP
POPCORN
CENTER
WARM
good, control unit is defective.
CONNECTED COMPONENTS
Oven lamp / Fan motor / Turntable motor
Power transformer
Hood lamp
Hood lamp
G 2
G 1
MINUTE
PLUS
START
ACCENT
LIGHT
TIMER
CLOCK