DOWNLOAD LG 47LH30 (CHASSIS:LA92A) Service Manual ↓ Size: 5.1 MB | Pages: 34 in PDF or view online for FREE

- 13 -

LG Electronics. Inc. All right reserved. 

C

2009

No

Item

Min Typ

Max 

Unit 

Remark

1.

Power On/Off 

10000

times

2.

DC Voltage

Inverter Voltage 

21.6 

24 

26.4 

V

Logic Voltage(Vcc)

4.7 

5

5.3 

V

Sound Amp Vcc 

14.0

15.0 

16.0 

V 

14~25V

19

20

21

V

20V: Lips

23

24

25

V

24V: Normal PSU

Micom B+

3.25

3.4

3.55

V

Tuner           5V

4.75 

5.0 

5.25 

V

VSC Vcc  

24V

23.0

24.0

22.0

V

Normal PSU

20V

19.0

20.0

21.0

V

Lips 

12V

11.0 12.0 13.0  V

5V

4.5

5.0

5.5 

V

Inside Temp.Under 20deg. 

No operation 

0 

0.5 

1 

V 

3.

AC Power Shut Down Voltage 

90 

264 

V

Wide Range PSU

No

Item

Content

Unit

1 

Protrusion

Satisfy appearance inspection 

LG(51)G2-2001

2 

Appearance quality 

Satisfy appearance inspection 

LG(51)G1-1030

3 

Print specification 

Distinguish printed matter at a distance of 40cm

4 

Product 

Before Packing

1140.6 (W)X 723 (H)X 99 (D)

mm

Without Stand

Dimension 

After Packing

1250 (W)X 885 (H)X 245 (D)

mm

Without Stand

5 

Product 

Only SET 

21.9 

Kg

Without Stand

Weight

With BOX 

24.5

Kg

Without Stand

6 Stand 

Ass’y SWIVEL

(±)20

degree

Fixed 

Stand

No Item  Standard 

Unit

Remark

1.

VSB Receiving 

CH.2 ~69CH

1 ~135CH(CATV)

1 ~135CH(CADTV))

2.

Video Resolution 

ATSC 18 FORMAT

3.

Audio Bit Resolution

32,40,48,56,64,80,96,112,128,160,

Kbps

192,224,256,320,384,448,512,576,640

4.

VSB RF Input

75

Ω

unbalanced, F type Connector input

5.

Sync Stable Time 

Under 3.0 

SEC

LG Electronics. Inc. All right reserved. 

C

2009

- 14 -

This spec. sheet applies to LA92A Chassis applied LCD TV all
models manufactured in TV factory

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) Adjustment must be done in the correct order.
3) The adjustment must be performed in the circumstance of 25

±50ºC of temperature and 65±10% of relative humidity if there
is no specific designation.

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

50/60Hz. 

5) The receiver must be operated for about 5 minutes prior to the

adjustment when module is in the circumstance of over 15°C

- In case of keeping module is in the circumstance of 0°C, it

should be placed in the circumstance of above 15°C for 2 hours.

- In case of keeping module is in the circumstance of below -

20°C, it should be placed in the circumstance of above 15°C
for 3 hours.

*Caution) When still image is displayed for a period of 20
minutes or longer (especially where W/B scale is strong.
Digital pattern 13ch and/or Cross hatch pattern 09ch), there
can some afterimage in the black level area.

1) Main PCB check process

• Adjust 480i Comp1
• Adjust 1024*768 RGB
Above adjustment items can be also performed in Final
Assembly if needed. Both Board-level and Final assembly
adjustment items can be check using In-Star Menu

1)ADJUST CHECK.

2)  Final assembly adjustment

• EDID/DDC download
• White Balance adjustment
• RS-232C functionality check
• Factory Option setting per destination
• Ship-out mode setting (In-Stop)

3) Etc

• Ship-out mode
• Service Option Default
• USB Download(S/W Update, Option, Service only)
• ISP Download(Option)

4.1.1 Overview

ADC adjustment is needed to find the optimum black level and
gain in Analog-to-Digital device and to compensate RGB
deviation. 

4.1.2 Equipment & Condition

1) Jig (RS-232C protocol)
2) MSPG-925 Series Pattern Generator(MSPG-925FA)

- Resolution: 480i Comp1(MSPG-925FA model-209, pattern-65)

1024*768 RGB (MSPG-925FA: model-60 , pattern-65)

- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p

4.1.3 Adjustment

4.1.3.1 Adjustment method
• Using RS-232, adjust items listed in 3.1 in the other shown

in “4.1.3.3”

4.1.3.2 Adj. protocol 

Ref.) ADC Adj. RS232C Protocol_Ver1.0

4.1.3.3 Adj. order

• ad 00 00 [Enter ADC adj. mode]
• xb 00 40 [Change input source to Component1(480i)]
• ad 00 10 [Adjust 480i Comp1]
• xb 00 60 [Change input source to RGB(1024*768)]
• ad 00 10 [Adjust 1024*768 RGB]
• ad 00 90 End adj.

Ref) ADC adj. RS232C Protocol_Ver1.0

Protocol     Command 

Set ACK

Enter mode

aa 00 00  d 00 OK00x

Source 

xb 00 40

b 00 OK40x (Adjust 480i Comp1 )

change 

xb 00 60b  00 OK60x (Adjust 1024*768 RGB)

Begin adj. 

ad 00 10

Return 

OKx (Case of Success)

adj. result

NGx (Case of Fail)

Read

(main) (main 

)

adj. data

ad0020 

0000000000000000000000007c007b006dx

(sub ) 

(Sub)

ad 00 21   000000070000000000000000007c00830077x

Confirm adj.  ad 00 99  NG 03 00x (Fail)

NG 03 01x (Fail)

NG 03 02x (Fail)

OK 03 03x (Success)

End adj. 

ad 00 90  d 00 OK90x

5.1.1 Overview

ADC adjustment is needed to find the optimum black level and
gain in Analog-to-Digital device and to compensate RGB
deviation.

5.1.2 Equipment & Condition

1) Adjust Remocon
2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern Generator
- Resolution: 480i, 1024*768
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level: 0.7±0.1 Vp-p

3) Must use standard cable

5.1.3 Adjust method

5.1.3.1 ADC 480i Comp1
1) Check connected condition of Comp1 cable to the

equipment

2) Give a 480i Mode, Horizontal 100% Color Bar Pattern to

Comp1.(MSPG-925FA Î Model: 209, Pattern: 65)

3) Change input mode as Component1 and picture mode as

“Standard”

4) Press the In-start Key on the ADJ remote after at least 1

min of signal reception. Then, select  7. External ADC -> 1.
COMP 480i on the menu. Press enter key. The adjustment
will start automatically.

5) If ADC calibration is successful, “ADC RGB Success” is

displayed. 

If ADC calibration is failure, “ADC RGB Fail” is displayed.

6) If ADC calibration is failure, after recheck ADC pattern or

condition retry calibrationError message refer to

5.2.1 Overview

• W/B adj. Objective & How-it-works

- Objective: To reduce each Panel’s W/B deviation
- How-it-works: When R/G/B gain in the OSD is at 192, it

means the panel is at its Full Dynamic Range. In order to
prevent saturation of Full Dynamic range and data, one of
R/G/B is fixed at 192, and the other two is lowered to find
the desired value.

- Adj. condition : normal temperature
1) Surrounding Temperature: 25±5 °C
2) Warm-up time: About 5 Min
3) Surrounding Humidity: 20% ~ 80%

5.2.2 Equipment

1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /LED

Module:CH14)

2) Adj. Computer (During auto adj., RS-232C protocol is

needed)

3) Adjust Remocon
4) 

Video Signal Generator MSPG-925F 720p/216-
Gray(Model:217, Pattern:78)

-> Only when internal pattern is not available 

• Color Analyzer Matrix should be calibrated using CS-1000

5.2.3 Equipment connection MAP

5.2.4 Adj.Command (Protocol)

• RS-232C Command used during auto-adj. 

Ex) wb 00 00 -> Begin white balance auto-adj.

wb 00 10 -> Gain adj.
ja 00 ff -> Adj. data
jb 00 c0
... 
...
wb 00 1f -> Gain Gain adj. complete
*(wb 00 20(Start), wb 00 2f(End)) -> Off-set adj. 

wb 00 ff -> End white balance auto adj.  

5.2.5 Adj. method

5.2.5.1 Auto adj. method
1) Set TV in adj. mode using POWER ON key
2) Zero calibrate probe then place it on the center of the

Display

3) Connect Cable(RS-232C)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sing), check adj. status pre

mode (Warm, Medium, Cool)

6) Remove probe and RS-232C cable to complete adj.

• W/B Adj. must begin as start command “wb 00 00” , and finish

as end command “wb 00 ff”, and Adj. offset if need

- 15 -

LG Electronics. Inc. All right reserved. 

C

2009

Color Analyzer

Computer

RS-232C

# Pattern Generator

Signal Source

Probe

RS-232C

RS-232C

* If TV internal patter n is used, not  

CMD

ID DATA

Explanation

wb 

00 

00 

Begin White Balance adj.

wb

00 

ff

End White Balance adj.

(internal pattern disappears )

5.2.5.2 Manual adj. method
1) Set TV in Adj. mode using POWER ON
2) Zero Calibrate the probe of Color Analyzer, then place it on

the center of LCD module within10cm of the surface..

3) Press ADJ key -> EZ adjust using adj. R/C Æ 6. White-

Balance then press the cursor to theright (KEY

).

(When KEY(

) is pressed 216 Gray internal pattern will be

displayed)

4) One of R Gain / G Gain / B Gain should be fixed at 192,

and the rest will be lowered to meet the desired value.

5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of

color temperature.

• If internal pattern is not available, use RF input. In EZ Adj.

menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner(ON). By selecting OFF, you can
adjust using RF signal in 216 Gray pattern.

• Adj. condition and cautionary items

1) Lighting condition in surrounding area Surrounding lighting

should be lower 10 lux. Try to isolate adj. area into dark
surrounding.

2) Probe location

- PDP: Color Analyzer (CA-100, CA-100+, CA210) probe

should be firmly attached to the Module

- LCD: Color Analyzer (CA-210) probe should be within 10cm

and perpendicular of the module surface (80°~ 100°)

3) Aging time

- After Aging Start, Keep the Power ON status during 5

Minutes.

- In case of LCD, Back-light on should be checked using no

signal or Full-white pattern.

5.2.6 Reference (White Balance Adj. coordinate and color

temperature)

• Luminance: 216 Gray
• Standard color coordinate and temperature using CS-1000

(over 26 inch)       

• Standard color coordinate and temperature using CA-210(CH 9)

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

Meun.

2) Depending on destination, select KR, then on the lower

Country option. Selection is done using +, - KEY

1. Put the USB Stick to the USB socket
2. Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is Low, it
didn’t work. But your downloaded version is High, USB data is
automatically detecting
3. Show the message “Copying files from memory”

4. Updating is staring.

5. Updating Completed, The TV will restart automatically
6. If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)

* If downloading version is more high than your TV have, TV

can lost all channel data. In this case, you have to channel
recover. if all channel data is cleared, you didn’t have a
DTV/ATV test on production line.

* After downloading, have to adjust TOOL OPTION again.

1. Push "IN-START" key in service remote controller.
2. Select "Tool Option 1" and Push “OK” button.
3. Punch in the number. (Each model has their number.)

- 16 -

LG Electronics. Inc. All right reserved. 

C

2009

Coordinate 

Mode 

x y 

Temp uv

∆

Cool 0.276 0.283  11000K  0.0000

Medium 0.285  0.293 

9300K 

0.0000

Warm 0.313  0.329 

6500K  0.0000

Coordinate 

Mode 

x y 

Temp uv

∆

Cool 0.276±0.002 0.283±0.002 11000K 0.0000

Medium 0.285±0.002  0.293±0.002 

9300K 

0.0000

Warm 0.313±0.002  0.329±0.002  6500K  0.0000

Model    Tool1   Tool2  Tool3 Tool4

Menu

47LH30  32897   2600   932    1152   3 HDMI,CAN Tuner,1 RCA