LG SolarDOM MP-9483SLA Service Manual page 22

COMPONENTS
Disconnect the 4 pin
connector from P.C.B.
(Refer to schemetic diagram)
RELAY OF P.C.B.
(Wire leads removed.)
Note: Relay
Relay 1: Fan motor
Circulation motor
Relay 2: Oven lamp
Turntable motor
Relay 3: P.T.C Relay
(Positive
Temperature
Coefficient)
Relay 4: Microwave
Relay 5: Up. sheath heater
Relay 6: Lo. sheath heater
Relay 7: Halogen+Ceramic
Heater
FAN MOTOR
(Wire leads removed)
TURNTABLE
MOTOR
(Wire leads removed)
NOTE : • A MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS
SERVICED FOR ANY REASON.
• MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION.
• WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE
CONNECTOR, NOT THE WIRES.
TEST PROCEDURE
Check for P.C.B. connector.
1 2 3 4
Relay 1,2,3,4,5,6,7
Measure the resistance.
(Ohm-meter scale: R x 1)
Measure the resistance.
(Ohm-meter scale: R x 1000)
5-12
RESULTS
Cooking Start OFF
Cooking Start OFF
Normal: Approx. 1.6 ohm
Abnormal: Infinite or several
ohm.
Normal: Approx. 10~20 kohm
Abnormal: Infinite or several
ohm.