DOWNLOAD LG 42CL40-UA (CHASSIS:LA92B) Service Manual ↓ Size: 5.14 MB | Pages: 45 in PDF or view online for FREE

- 13 -

• HDMI IV [C/S: 8091]

EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3

EDID Block 1, Bytes 128-255 [80H-FFH]
Block Type: CEA EDID Timing Extension Version3

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)

4.8 

5

5.3 

V

Sound Amp Vcc 

19 

20 

22 

V 

Lips 20

22

24

26

V

PSU 24V 

Micom B+

3.25

3.4

3.55

V

Tuner 5V

4.75 

5.0 

5.25 

V

VSC Vcc  

24V

22.0

24.0

26.0

V

PSU 24V 

20V

19.0

20.0

21.0

V

Lips 20

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

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0

02  03 1F F1  47 90 22 20  05 04 03 02 26 15  07 50

10 09 07 07 67  03 0C 00 40  00 B8 2D E3 05 03 01 02

20 3A  80  18 71  38 2D  40 58  2C 04  05  7E 8A 42  00 00

30

1E 01 1D 80  18 71 1C 16  20 58 2C 25 00 7E 8A 42

40

00  00  9E 01  1D 00  72 51

D0 1E 20 6E 28 55  00 7E

50  8A  42  00 00  1E 8C  0A D0  8A  20  E0  2D  10  10  3E 96

60 00  7E  8A 42  00 00  18 26  36  80 A0 70  38 1F  40 30

70

20  25  00 7E 8A 42 00 00  1A 00 00 00 00 00  00 9A

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0

00  FF FF

FF FF FF FF 00  1E 6D 02 00 01 01  01 01

10 

 03  13  01 03

80 73  41 78  0A CF 74 A3 57 4C B0 23

20 

 09  48 4C A1  08 00 A9 40  81 80 61 40 45 40  31 40

30 01 01 01 

01 01 01 02 3A 80 18 71 38 2D 40 58 2C

40 45  00  7E 8A  42 00  00 1E  01 1D 00  72  51 D0 1E 20

50 

 

6E 28 55 00 7E 8A 42 00  00 1E 00 00 00 FD 00 39

60 

 3F  1F 52 10  00 0A 20 20  20 20 20 20 00 00  00 FC

70 00  4C  47 20  54 56 0A 20  20  20  20  20

20 20  01 1B

No

Item

Content

Remark

1. Product 

Dimension

Width

Length

Height

Unit

Before Packing

1052.2

296

719

mm

SET(With Stand)

After Packing

1330

228

770

mm

2. Product 

Weight

Only 

SET

19.0

Kg

With 

Stand

With BOX

23.5

Kg

- 14 -

This specification sheet is applied to all of the LCD TV with
LA92B chassis.

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

±5ºC 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.

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.

*APC - After Manual-Insert, executing APC

1. Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
2. Set as below, and then click “Auto Detect” and check “OK”
message. If “Error” is displayed, Check connection between
computer, jig, and set.
3. Click “Read” tab, and then load download file (XXXX.bin) by
clicking “Read”

4. Click “Connect” tab. If “Can’t ” is displayed, Check
connection between computer, jig, and set.

5. Click “Auto” tab and set as below.
6. Click “Run”.
7. After downloading, check “OK” message.

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”

(3) 

filexxx.bin 

(1) 

(4) 

Please Check the Speed : 
To use speed between 

from 200KHz  to 400KHz  

          filexxx.bin 

(5) 

(7) .OK 

(5) 

(6) 

 

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.)
4. Completed selecting Tool option.

4.1 Board-level adjustment

• Adjust 480i Comp1 adj.(Comp1080i & RGB Adjust use internal

pattern).

• EDID/DDC download
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-Start Menu 1. Adjust
Check.

* After Board level adjustment, set volume setting value 0

4.2 Final assembly adjustment

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

4.3 Etc.

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

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) Jig (RS-232C protocol) 
2) Input : MSPG-925FS(Model : 209 ,Pattern : 65, Only

component))

3) RGB Adjust use internal pattern.5.1.3 Adjustment

5.1.3 Adjustment

5.1.2.1 Method

• Using RS-232, adjust items listed in 3.1 in the order shown
in 5.1.2.3 Adj. protocol

Ref.) ADC adj. RS232C Protocol_Ver1.0

5.1.2.3 Adj. order

•ad 00 00 [Enter ADC adj. mode]
•ad 00 10 [Adjust 480i Comp1/1080i Comp1/1024*768 RGB]
•ad 00 90 End adj.

- 15 -

 

 

Model 

Tool option1  Tool option2

Tool option3 

Tool option4

37LH55-UA 20993

3400

35748 

1024

42LH55-UA 25089

3400 

35748 

1024

47LH55-UA 33281 

3400 

35748 

1024

Protocol Command 

Set 

ack

Enter adj.

ad 00 00 

d 00 OK00x

mode

Begin adj. 

ad 00 10

Return adj.

OKx (Success)

result

NGx (Fail)

Read adj. 

(main)

(main) 

data

ad 00 20

000000000000000000000000007c007b006dx

(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

6.1.1 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.

6.1.2 Equipment

1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /LED
Module:CH14)
2) Adjustment Computer (During auto adj., RS-232C protocol
is needed)
3) Adjustment R/C
4) Video Signal Generator MSPG-925F 720p/216Gray
(Model:217, Pattern:78)
-> Only when internal pattern is not available
• Color Analyzer Matrix should be calibrated using CS-1000

6.1.3 Equipment connection map

• Protocol
<Command Format>

- LEN: Number of Data Byte to be send
- CMD: Command
- VAL: FOS Data
- CS: Checksum of sent Data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]

• RS-232C Command used during auto-adjustment

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 adj. complete
*(wb 00 20(Start), wb 00 2f(End)) -> Off-set adjustment

wb 00 ff -> End white balance auto-adjustment

6.1.4 Adjustment method

6.1.4.1 Auto adjustment 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 Sign), check adj. status per

mode (Warm, Medium, Cool)

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

• adj. must begin w/ command “Wb 00 00”, and end w/”wb 00

ff” and adjustment offset if needed.

6.1.4.2 Manual adj. method

Dynamic contrast : off
Dynamic color : off
OPC : Off
Energy saving mode : Off

1) Set TV in adj. mode using POWER On Key
2) Press ADJ key Æ EZ adjust using adj. R/C
3) Using CH + / - KEY, select 7.TEST PATTERN then press

Enter to place inHEAT RUN mode and wait for 5 minutes.

4) Zero calibrate the probe of Color Analyzer, then place iton

the center of LCD module within 10 cm of the surface.

5) Press ADJ key Æ 6. White-Balance then press the cursor

to the right (KEY

)

(When

is pressed Full White internal pattern will be

displayed)

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

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

7) Adjustment is performed in COOL, MEDIUM, WARM 3

modes of color temperature

• If internal pattern is not available, use RF input(Full white

216 gray) In EZ Adjustment menu 6.White Balance, you can
select one of 2 options: Test pattern ON, Test pattern OFF.
Default is “ON” By selecting “OFF”, you can adjust using RF
signal.   

• Adjustment condition and cautionary items

1) Lighting condition in surrounding area Surrounding lighting

should be lower than 10 lux.

Try to isolate adj. area into dark surrounding.

2) Probe location

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

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

- B/L on should be checked using no signal or Full white

Pattern

6.1.5 Reference 

(White Balance adj. coordinate and color temperature)

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

- 16 -

Color Analyzer

Computer

RS-232C

# Pattern Generator

* If TV internal pattern is used,not needed

Signal Source

Probe

RS-232C

RS-232C

START     6E    A     50    A

      LEN    A    03    A

      CMD    A    00    A

      VAL    A    CS    A

STOP 

CMD

ID DATA

Explanation

wb 

00 

00 

Begin White Balance adj.

wb

00 

ff

End White Balance adj. 

(internal pattern disappears)

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