COMPONENTS

TEST PROCEDURES

 

RESULTS

 

 

Check for continuity of relay 2 with an

POWER

 

 

 

LEVEL

 

 

 

ohm-meter.

 

 

 

 

 

 

 

(Remove wire leads from relay 2 and

1

4 sec

18 sec

 

operate the unit.)

2

6 sec

16 sec

 

 

 

Relay 7

3

8 sec

14 sec

 

 

 

 

4

10 sec

12 sec

RELAY2

 

5

12 sec

10 sec

 

 

 

 

6

14 sec

8 sec

 

 

7

16 sec

6 sec

 

Figure 30

8

18 sec

4 sec

 

 

 

 

 

wCAUTION : The relay connector 2(White)

9

20 sec

2 sec

 

 

 

 

 

and 5(Red) must be correctly connected

10

22 sec

0

 

Relay 6.

 

 

 

 

These two connectors are not Inter-

 

 

 

 

changeable.

 

 

 

NOTES:

A MICROWAVE ENERGY 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.

B. CHECKOUT PROCEDURES

(1) CHECKOUT PROCEDURES FOR FUSE BLOWING

CAUTION: REPLACE BLOWN FUSE WITH 20 AMPERE FUSE.

 

 

 

 

 

 

 

 

PROBLEMS

 

 

CAUSES

 

 

 

 

 

 

 

 

 

Fuse blows immediately after

 

 

 

 

 

 

 

 

the door is closed.

 

 

 

 

 

 

 

 

Improper operation of the primary interlock, secondary

 

 

 

Fuse blows immediately after

 

 

 

 

 

interlock switches and/or the interlock monitor switch.

 

 

 

the door is opened.

 

 

 

 

 

 

 

 

 

 

 

Fuse blows when the door is closed and START

 

Malfunction of the high voltage transformer; the high

 

 

 

key is touched.

 

voltage capacitor including the diode, the magnetron,

 

 

 

 

 

 

the blower motor or the circuit board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTES:

If the fuse is blown by an improper switch operation, replace the all Interlock switches, PCB Ass’y and the fuse at the same time. After replacing the the all Interlock switches, PCB Ass’y,Fuse with new ones, make sure that they are correctly connected.

Check for microwave energy leakage according to interlock adjustment procedures on page 7-12 when the primary interlock, secondary interlock switches and/or the interlock monitor switches are adjusted or replaced.

7-18

Page 29
Image 29
LG Electronics LMV1625W, LMV1625B service manual Checkout Procedures, Power Level

LMV1625W, LMV1625B specifications

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