LG Electronics LMV1825SBQ, MV1825SW service manual FPC Connector

Page 28

COMPONENTS

 

TEST PROCEDURES

 

 

RESULTS

 

Measure the resistance between terminal

When

When not

 

pins of connector KEY CONNECTOR.

 

 

Resistance

touched

touched

 

NOTE:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

value

Less than

More than

 

When reconnecting the FPC connector,

 

 

 

 

400 ohms 1 mega ohm

 

make sure that the holes on the FPC

 

 

 

 

 

 

connector are properly engaged with hooks

 

 

 

on the plastic fastener.

 

 

 

 

FPC CONNECTOR

 

 

 

 

 

 

 

 

 

 

 

MATRIX CIRCUIT FOR

 

 

Top

 

 

 

TOUCH KEY BOARD

 

 

 

 

 

 

CONNECTOR(KEY CON)

 

 

 

1

TOUCH KEY

 

 

 

 

 

 

 

 

 

 

2

 

1

2

3

4

5

 

6

7

 

3

BOARD

 

 

 

4

VENT

 

 

 

 

TIME

 

 

 

 

 

N.C

N.C

N.C

 

5

0

 

 

5

 

HI/LO/OFF

 

COOK

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

6

 

LIGHT

CUSTOM

N.C

N.C

 

AUTO

6

1

 

 

7

 

HI/LO/OFF

SET

 

DEFROST

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

 

 

 

 

8

 

LESS

CLOCK

Ez-On

N.C

 

KITCHEN

7

2

 

 

9

 

 

TIMER

 

 

 

 

 

 

 

 

 

 

10

 

10

 

 

 

 

 

 

 

 

 

 

CUSTOM

LIGHT

N.C

N.C

 

POWER

8

3

 

 

11

 

COOK

TIMER

 

 

 

LEVEL

 

 

12

 

11

 

 

 

 

 

9

4

 

 

 

TURNTABLE

STOP

START

N.C

 

HOLD

 

 

13

 

ON/OFF

CLEAR

 

 

 

WARM

 

 

 

 

 

 

12

 

 

 

 

 

 

 

 

 

 

 

MORE

SENSOR

SENSOR

SENSOR

 

SENSOR

SENSOR

SENSOR

 

Figure 28

 

 

PIZZA

POTATO

POPCORN

 

VEGETABLE

REHEAT

COOK

 

 

 

 

 

 

 

 

13

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 27

 

 

 

 

 

 

 

Normal: Approximately

 

 

BK~RD: 4.5~6.2 Kohm

 

 

RD~WH: 2.0~3.5 Kohm

SENSOR

 

BK~WH: 2.0~3.5 Kohm

 

 

(For sensor model only)

 

Abnormal: Infinite or several.

1

BK

2

RD

 

3

WH

 

Figure 29

 

 

7-17

Image 28
Contents Safety Precautions in this Manual Microwave OvenPage Table of Contents Specifications Microwave Radiation Installation Grounding InstructionsOperating Instructions Control PanelControl Panel Instructions Overall Circuit Diagram Schematic DiagramMatrix Circuit for Touch KEY Board Features and Specifications Features General Precautions in USETrial Operation Precautions and Repair Service Tips PreliminaryMicrowave Leakage Test EquipmentPower Output Measurement Measurement with the Outer Case RemovedDisassembly Instructions Important NotesHOW to Remove the F.P.C. Connector HOW to Insert the F.P.C. ConnectorRemoving the OUT CASEFigure Removing the Door Interlock Switches Figures 9,10 Removing Magnetron Removing Stirrer FAN Removing Door FigureRemoving the Ventilation Motor Assembling DoorReplacing the Humidity Sensor Removing the Turntable Motor Interlock System Interlock MechanismTest the Latch and Switch Sequence Components Test Procedure Results Interlock Continuity TestTest and Checkout PROCEDURES, and Trouble Shooting Test ProceduresHIGH-VOLTAGE Diode FPC Connector Checkout Procedures Power LevelCheckout Procedures for Relay Problem a Checkout Procedures for Circuit Board Trouble Shooting Circuit board Poor Check the contact of relay 2see Normal Operation Circuit board Fuse Exploded View Control Panel Oven Cavity Latch Board Interior 50FZZA Installation Schematic Diagram of P.C.B Printed Circuit Board May