32LB4DS (CHASSIS:LA73A) - LG TV Service Manual (repair manual). Page 10

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These instructions are applied to all of the LCD TV models
with LA73A 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 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.  

* Perform preliminary operation after receiving 100% White

Pattern (06CH).(or 8. White Pattern status of Ez-Adjust)

* How to enter White Pattern

1) Press the POWER ON key on the adjustment remote

control or press the ADJ key on the adjustment remote
control to enter Ez-Adjust.

2) Select the ‘10.Test Pattern’ using the CH + / - key and

then select White using the arrow keys to display the
100% FULL WHITE PATTERN.

- In this mode, It is possible to heat run the set without

separate signal generator.

Caution : When you keep the still screen on for more than
20 minutes (Especially internal digital pattern (13 CH),
Cross Hatch Pattern (09CH) with higher black/white
contrast), be careful not to create residual image on the
black level part.

note) ADC adjustment RS232C Protocol_Ver 1.0

- Pattern Generator : (MSPG-925FA)
- AV1 input (MSPG-925FA : model :201 , pattern :33)
- Adjust 480i Comp1(MSPG-925FA: mode:209, pattern:65)
- Adjust 1080p Comp1/RGB

(MSPG-925FA:model:225, pattern:65)

- RS232C ECHO exists for Everest3 Set

For details on the necessary requirement, refer to the
following adjustment method.

- ad 00 00  Enter ADC adjustment mode.
- kb 00 01  Switch RF input (Input is not switched)
- ad 00 10  Adjust RF and Video (Input is switched and

adjusted)

- kb 00 04  Switch component1 input (Input is not switched)
- ad 00 10  Adjust 480i Comp1 (Input is switched and

adjusted)

- kb 00 06  Switch RGB-DTV input (Actual input is not

switched)

- ad 00 10  Adjust 1080p Comp1/RGB (Input is switched

and adjusted)

- ad 00 90  Complete adjustment

This is a adjustment to reduce the color difference of video
signal

1) Connect the Video Signal Generator (Master) to TV AV

input terminal with AV output. At this time, when you
enter the input pattern as Model : 201(NTSC-M) ,
Pattern : 33(100% color Bar), the following video is
displayed on the screen.

Note: When the video is shown as follows showing
black patterns from the left, it cannot be adjusted. 

Order

Adjuster command

Set response

Enter adjustment mode

ad 00 00

d 00 OK00x

Switch source

kb 00 01

b 00 OK01x (Adjust RF and Video)

kb 00 04

b 00 OK04x (Adjust 480i Comp1)

kb 00 06 

b 00 OK06x (Adjust 1080p Comp1/RGB)

Start adjustment

ad 00 10

Return adjustment result

OKx (When succeeded)

NGx (When failed )

Read adjustment data

(main)

(For main)

ad 00 20

000000000000000000000000007c007b006dx

(sub)

(For sub)

ad 00 21

000000070000000000000000007c00830077x

Check adjustment

ad 00 99

NG 03 00x (When failed)

NG 03 01x (When failed)

NG 03 02x (When failed)

OK 03 03x (When succeeded)

Complete adjustment

ad 00 90

d 00 OK90x

<Fig 1> Model : 201(NTSC-M) , Pattern : 33(100% color Bar)

<Fig, 2>