DOWNLOAD LG 42LG6000 / 42LG6100 (CHASSIS:LD89F) Service Manual ↓ Size: 23.13 MB | Pages: 27 in PDF or view online for FREE

C

2008

- 13 -

This spec. sheet is applied to all of the LD89F chassis
manufactured at LG TV Plant all over the world.

2.1 Because this is not a hot chassis, it is not necessary to

use an isolation transformer. However, the use of
isolation transformer will help protect test instrument.

2.2 Adjustment must be done in the correct order.
2.3 The adjustment must be performed in the circumstance of

25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.

2.4 The input voltage of the receiver must keep 100~240V,

50/60Hz.

2.5 The receiver must be operated for about 15 minutes prior

to the adjustment.
- After RGB Full White in HEAT-RUN Mode, the receiver

must be operated prior to the adjustment.

- Enter into HEAT-RUN MODE 
(1) Press the "POWER ON" KEY on Adjustment R/C.
(2) Press the "ADJ KEY" on Adjustment R/C.
(3) Select "3. Test Pattern" by using D/E(CH +/-) and

press  ENTER(V)

(4) Select "White" by using F/G(VOL +/-) and press

ENTER(V)

• Set is activated HEAT run without signal generator in

this mode.

• Single color pattern ( RED / BLUE / GREEN ) of HEAT

RUN MODE uses to check panel.

• Caution : If you turn on a still pattern more than 20

minutes (Especially digital pattern, cross hatch
pattern),an after image may be occur in the black level
part of the screen.

=> Caution: Using ‘power on’ button of the Adjustment R/C ,

power on TV. 

• ADC Calibration Protocol (RS232)

- Baud rate : 115200 bps

- RS232 Host : PC

- echo : none

• Adjustment can be done using only internal ADC, so input

signal is not necessary.

• Required equipment : Adjustment R/C. 

1) Press ADJ key on adjustment R/C.
2) Select "1. ADC calibration" by using D/E(CH +/-) and

press ENTER(V)

3) Select "Start" by using F /G (VOL +/-) and press

ENTER(V)

4) ADC adjustment is executed automatically

NO

Item

CMD 1 CMD 2 Data 0

Enter  

Adjust ‘Mode In’

A

D

0

0 When transfer the  'Mode In'

Adjust MODE

Carry the command.

ADC adjust ADC Adjust

A

D

1

0 Automatically adjustment

(The use of a internal pattern)

Adjust ‘Mode Out’

A

D

9

0

Adjustment A

D

9

9 To check ADC Adjustment 

Confirmation

on Assembly line.

RF input

AV / Component / RGB input

NO SIGNAL or White noise

NO SIGNAL

- 14 -

C

2008

• You must adjust DTV 29 Channel and insert PCMCIA

CARD to socket.

1) If PCMCIA CARD works normally, normal signals display

on screen. But it works abnormally, "No CA module" words
display on screen.

=> Caution: Set up "RF mode" before launching products.

• Test Equipment
- Color Analyzer (CS-1000, CA-100+(CH.9), CA-210(CH.9) )
* Please adjust CA-100+ / CA-210 by CS-1000 before

measuring

=> You should use Channel 9 which is Matrix compensated

(White, Red, Green, Blue revised) by CS-1000 and adjust
in accordance with White balance adjustment coordinate

• Color temperature standards according to CSM and Module

• Change target luminance and range of the Auto adjustment

W/B equipment. 

• White balance adjustment coordinate and color temperature

* PC (for communication through RS-232C) => UART Baud rate :

115200 bps

Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C IN-START -> Enter the
mode of White-Balance, the pattern will come out.

Auto-control interface and directions
1. Adjust in the place where the influx of light like floodlight

around is blocked. (illumination is less than 10ux).

2. Adhere closely  the Color Analyzer (CA-210) to the module

less than 10cm distance, keep it with the surface of the Module
and Color Analyzer’s Prove vertically.(80~100°).

3. Aging time  

- After aging start, keep the power on (no suspension of

power supply) and heat-run over 15 minutes.

- Using ‘no signal’ or ‘full white pattern’ or the others, check

the back light on.

1) Press the ADJ KEY on Adjustment R/C.

Select "3. Test Pattern" by using D/E(CH +/-) and press
ENTER(V)
Select "White" by using F /G (VOL +/-) and press
ENTER(V) and heat run over 15 minutes.

2) Zero Calibrate CA-100+ / CA-210, and when controlling,

stick the sensor to the center of LCD module surface.

3) Press the ADJ KEY on Adjustment R/C
4) Select "2. White Balance" and press G(VOL +)

Set test-pattern on and display inside pattern. 

5) Control is carried out on three color temperatures, COOL,

MEDIUM, WARM. 

(Control is carried out three times)
< Temperature: COOL >
-  R-Cut / G-Cut / B-Cut is set to 64.
-  Control R-Gain and G-Gain.
-  Each gain is limited to 192.
< Temperature: MEDIUM >
-  R-Cut / G-Cut / B-Cut is set to 64.
-  Control R-Gain and B-Gain.
-  Each gain is limited to 192.
< Temperature: WARM >
-  R-Cut / G-Cut / B-Cut is set to 64.
-  Control G-Gain and B-Gain.
-  Each gain is limited to 192.
* One of R Gain / G Gain / B Gain should be kept on 192, and
adjust other two lower than 192.
(When R/G/B GAIN are all 192, it is the FULL DYNAMIC Range
of Module)

CSM

LCD

Cool

11000K

Medium

9300K

Warm

6500K

Target luminance

65

Range

20

Cool

CS-1000

CA-100+ (CH.9)

CA-210 (CH.9)

x

0.276

0.276±0.002

0.276±0.002

y

0.283

0.283±0.002

0.283±0.002

uv

0.000

0.000

0.000

Medium

CS-1000

CA-100+ (CH.9)

CA-210 (CH.9)

x

0.285

0.285±0.002

0.285±0.002

y

0.293

0.293±0.002

0.293±0.002

uv

0.000

0.000

0.000

Warm

CS-1000

CA-100+ (CH.9)

CA-210 (CH.9)

x

0.313

0.313±0.002

0.313±0.002

y

0.329

0.329±0.002

0.329±0.002

uv

0.003

0.003

0.003

- 15 -

C

2008

1-1. The whole flowchar

t which it follows in voltage output sta

te

1. Power

 Board

No

No

No

St

art

 c

h

eck

Do

es

 no

t s

cr

ee

n

w

hol

e comes out? 

Does not

low

 v

oltag

e outp

ut comes

out?  

Does n

ot

Inv

er

ter sign

al

 outp

ut 

comes out? 

No

No

No

Ye

s

Ye

s

No

Ye

s

Is

 the In

ter

face 

sig

n

a

l oper

ated?

2.

 Check the 

In

ter

face

 si

gn

a

l conditi

on

Ye

s

Ye

s

Do

es not

 the 

INV 24V

 v

o

lta

ge output

 

co

m

e

s ou

t?

Ye

s

Ye

s

Is

 it

 identica

l with

po

w

e

r o

ff condi

tion?

1.

 C

heck the 

Pow

er

 o

ff condi

tion

Ye

s

D

oes not

 the

 

St

-b

y 5

V

(P

-5

V

) sign

a

l 

comes

 out?

Ye

s

D

oes not 

the

 

VSC

 sig

na

l IN

V_C

T

L 

co

mes

 out?

  

Ye

s

Man

u

fact

ure e

n

terprise 

me

an

ing

 of

 a passage

No

6.

 C

h

eck the 

VSC

 lo

w

 Vol

tage output

Ye

s

Does not 

the

 

AC Detect

 si

gn

a

l  

comes

 out?

D

oes not

 the

RL_ON/P

W

R

_ON/

O

F

F

co

m

e

s ou

t?

D

oes not

 the

 V

SC

 

Lo

w

 Vol

ta

ge output 

co

m

e

s out?

3.

 C

heck the 

S

t_by

 5V 

sig

n

a

l ci

rc

u

it

4.

 Check the AC Detect signa

l circu

it

5.

 C

h

eck the 

VSC

 R

L_ON

?P

W

R

_ON

/O

F

F

 si

gna

l

7.

 C

heck the 

VSC

 IN

V_C

T

L si

gn

a

l

8.

 C

h

eck the 

IN

V

 24V 

vo

lta

ge output

 ci

rc

u

it 

C

2008

- 16 -

A powe

r 

cord

 is

 plugge

d 

in

 w

ith

 TV se

t?

Plug 

the powe

r co

rd

 in

.

No

Is

 AC

-I

NLET connected w

ith

 the

 power board?

Yes

C

onnect the  AC-

INLET.

No

Are the fuses(F100, F101 

or

 F700)

 O

K

 on the 

power

 board?

Yes

Re

pl

ace the fuses.

No

Symptom

1)

It does

 not charge at modu

le

.

2)

Fr

ont LED

 does

 not wor

k

Check the followings

Is

 the power

 board connected w

ith

 VSC

 Board

 though

 a cable?

C

onnect a cable.

No

Yes

Yes

2. No Power

Measure

 output 

voltages(16V,12V,5V) 

on

 the power board.

If 

the

 measured 

va

lues

 are 

not a prope

r value

, rep

lace

 power board

.