37LG50 (CHASSIS:LA84D) - LG TV Service Manual (repair manual). Page 9

These instructions are applied to all of the LCD TV, LA84D.

(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 equipment.

(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of

20±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.

(4) The input voltage of the receiver be must kept 220V, 60Hz

when adjusting.

(5) The receiver must be operational for about 15 minutes

prior to the adjustments.  

(6) Perform preliminary operation after receiving 100% White

Pattern (06CH). (Or 3. White Pattern status of Ez-Adjust)

(7) White Pattern entry method

1) Enter into Ez-Adjust by pressing the ADJ key on the

adjustment R/C.

2) 100% FULL WHITE PATTERN appears if pressing the

OK (

A

) key after selecting the 3.WHITE PATTERN with

the CH + / - KEY.

* It is possible to heat run the set without a separate signal

generator in this mode.

Caution : Care must be taken as afterimage phenomena
may occur about the black level part of screen If leaving
pause image turned on for more than 20 minutes
(especially inner digital pattern (13 CH), Cross Hatch
Pattern (09CH) with significant black/white contrast).

(1) Auto RGB Gain/Offset Adjustment

1) Convert to PC in Input-source

I

2

C COMMAND:0xF4(SELECT INPUT) 0x00 0x60(RGB)

cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT),

0x60(RGB), 0x90(HDMI)

2) Signal equipment displays

Output Voltage : 700 mVp-p
Impress Resolution XGA (1024x 768 @ 60Hz)

Model : 60   in Pattern Generator
Pattern : 29 in Pattern Generator (MSPG-925 Series)
[gray pattern that left & right is black and center is
white signal (Refer below picture)].

3) Adjust by commanding AUTO_COLOR_ADJUST (0xF1)

0x00 0x02 instruction.

(2) Confirmation

1) We confirm whether “0xB6(RGB)” address of EEPROM

“0xA2” is “0xAA” or not.

2) If  “0xB6(RGB)” address of EEPROM “0xB2” isn’t

“0xAA”, we adjust once more.

3) We can confirm the ADC values from “0xB0~0xB5

(RGB)” addresses in a page “0xA2”

* Manual ADC process using Service Remote control. After

enter Service Mode by pushing “ADJ” key, execute “Auto-
adjust” by pushing “

G

” key at “0. ADC CALIBRATION”.

(1) Component Gain/Offset Adjustment

1) Convert to Component in Input-source

I

2

C command : 0xF4(Select input) 0x00 0x40(Component)

cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT),

0x60(RGB), 0x90(HDMI)

2) Signal equipment displays

Impress Resolution  480i
MODEL : 209    in Pattern Generator(480i Mode)
PATTERN : 08 in Pattern Generator(MSPG-925 Series)

3) Adjust by commanding AUTO_COLOR_ADJUST (0xF1)

0x00 0x02 instruction.

4) Signal equipment display

Impress Resolution : 1080i
- MODEL: 223

in Pattern Generator(1080i Mode)

- PATTERN: 08   in Pattern Generator(MAPG-925 series)

5) Adjust by commanding AUTO_COLOR ADJUST(0xF1)

0x00  0x02 instruction.

* Manual ADC process using Service Remote control. After

enter Service Mode by pushing “ADJ” key, execute “Auto-
adjust” by pushing “

G

” key at “0. ADC CALIBRATION”.

- 9 -

<Adjustment pattern (PC)>

<Adjustment pattern (COMPONENT)>