LG 42LM3700, Service Manual

- 13 -

LGE Internal Use Only

Copyright © 

 LG Electronics. Inc. All rights reserved.

Only for training and service purposes

5.2. Option selection per country

5.2.1. Overview

(1)  Tool  option  selection  is  only  done  for  models  in  Non-USA 

North America due to rating

(2)  Applied  model:  LA02D  and  LA02E  Chassis  applied  to 

CANADA and MEXICO

5.2.2. Country Group selection

(1)  Press ADJ  key  on  the Adj.  R/C,  and  then  select  Country 

Group Menu

(2)  Depending  on  destination,  select  KR  or  US,  then  on  the 

lower Country option, select US, CA, MX.

     Selection is done using +, - KEY

5.2.3. Tool Option inspection

▪ Press Adj. key on the Adj. R/C, then select Tool option.

Model

Module

Tool 1

Tool 2

Tool 3

Tool 4

Tool 5

32LM3400-UC

LGD

16820

375

10523 13228

6176

42LM3400-UC

LGD

16822

375

10523 13228

6176

42LM3700-UC

LGD

16982

375

10523 13228

6176

47LM4700-UE

LGDCI

33319

2423

10523 29612

7170

55LM4700-UE

LGDCI

33321

2423

10523 29612

7170

47LM4700-UE

LGD

33319

2423

10523 29612

7362

55LM4700-UE

LGD

33321

2423

10523 29612

7362

6. GND and HI-POT Test

6.1. GND & HI-POT auto-check preparation

(1)  Check  the  POWER  CABLE  and  SIGNAL  CABE  insertion 

condition

6.2. GND & HI-POT auto-check

(1)  Pallet moves in the station. (POWER CORD / AV CORD is 

tightly inserted)

(2) Connect the AV JACK Tester.

(3) Controller (GWS103-4) on.

(4) GND Test (Auto) 

- If Test is failed, Buzzer operates.

- If Test is passed, execute next process (Hi-pot test).       

  (Remove A/V CORD from A/V JACK BOX) 

(5) HI-POT test (Auto)

 - If Test is failed, Buzzer operates.

 -  If Test is passed, GOOD Lamp on and move to next process 

automatically.

6.3. Checkpoint

(1) Test voltage

- GND: 1.5KV/min at 100mA

- SIGNAL: 3KV/min at 100mA

(2) TEST time: 1 second

(3) TEST POINT

- GND Test = POWER CORD GND and SIGNAL CABLE GND.

- Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL.

(4) LEAKAGE CURRENT: At 0.5mArms

7. AUDIO output check

7.1. Audio input condition

(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation

(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)

(3) RGB PC: 1KHz sine wave signal (0.7Vrms)

7.2. Specification

No

Item

Min

Typ

Max

Unit

Remark

1

Audio 
practical 
max Output, 
L/R

9.0
8.5

10.0

8.9

12.0

9.9

W

Vrms

(1)  Measurement 

condition

   -  EQ/AVL/Clear 

Voice: Off

(2)  Speaker (8Ω 

Impedance)

8. EYE-Q Check  

Step 1) Turn on the TV..

Step 2)  Press  'EYE  button'  on  the  adjustment  remote-

controller.

Step 3)  Cover  'Eye  Q  sensor'  on  the  front  of  set  with  your 

hands, hold it for 6 seconds.

Step 4)  Check "the Sensor Data" on the screen, make certain 

that  Data  is  below  10.  If  Data  isn’t  below  10  in  6 

seconds,  Eye  Q  sensor  would  be  bad.  You  should 

change Eye Q sensor.

Step 5)  Uncover  your hands  from Eye Q sensor, hold  it for 6 

seconds.

Step 6)  Check  "Back  Light(xxx)"  on  the  screen,  check  data 

increase . You should change Eye Q sensor. 

<Step 2>

<Step 5>

<Step 6>

<Step 3>

<Step 4>