COMPONENTS

TEST PROCEDURE

 

RESULTS

 

RELAY 2

Check for continuity of relay 2 with an

POWER

 

 

 

ohm-meter.

 

 

 

LEVEL

 

 

 

(Remove wire leads from relay 2 and

 

 

 

 

 

 

 

operate the unit.)

 

 

 

 

1

4 sec

18 sec

 

 

 

 

 

 

 

 

 

 

2

6 sec

16 sec

 

 

 

 

 

3

8 sec

14 sec

 

 

 

 

 

4

10 sec

12 sec

 

 

 

 

 

5

12 sec

10 sec

 

 

 

 

 

 

 

 

 

 

6

14 sec

8 sec

 

 

 

 

 

7

16 sec

6 sec

 

 

 

 

 

8

18 sec

4 sec

 

 

 

 

 

9

20 sec

2 sec

 

 

 

 

 

 

 

 

 

 

10

22 sec

0 sec

Relay 2

FAN MOTOR

Measure the resistance.

Normal:

 

(Wire leads removed)

(Ohm-meter scale: R x 1)

A: Approx. 85

~ 100 ohm

 

 

B: Approx. 10

~ 25 ohm

 

B

Abnormal: Infinite or several

 

ohm.

A

TURNTABLE

Measure the resistance.

 

Normal: Approx. 100~150 ohm

MOTOR

(Ohm-meter scale: R x 1)

 

Abnormal: Infinite or several

(Wire leads removed)

 

 

 

 

 

ohm.

 

 

 

 

 

 

 

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.

Copyright © 2007 LG Electronics. Inc. All right reserved.

5-10

LGE Internal Use Only

Only for training and service purposes

 

 

Page 20
Image 20
LG Electronics MS3447GRS service manual Relay, Power, Level, FAN Motor, Turntable

MS3447GR, MS3447GRS specifications

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