55LH95QD (CHASSIS:LC91E) - LG TV Service Manual (repair manual). Page 9

This specification sheet applied to LB92F 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. But it is

flexible when its factory local problem occurs. . 

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.  

4) The input voltage of the receiver must keep 220V, 60Hz. 
5) Before adjustment, execute Heat-Run for 5 minutes.
6) Displayed 100% White Pattern in state of Heat-Run 

• How to make set white pattern

1) Press Power ON button of Service Remocon  
2) Press ADJ button of Service remocon. Select “7. Test

pattern” and after select “White” using navigation button,
and then you can see 100% Full White pattern.

* In this status you can maintain Heat-Run useless any

pattern generator 

* Notice: if you maintain one picture over 20 minutes

(Especially sharp distinction black with white pattern or
Cross hatch pattern) then it can appear image stick near
black level. 

* Confirm Tool option before adjustment
* You must confirm and modify that Media-box option in state

of Wireless or wired and TV option in state of HDMI5.

- ADC Calibration(Media-Box Only)
- 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-STAR” Menu
“1.Adjust Check”.

* Don't use Instop key after Media-Box Main b/d board test

and Media-Box assemble & test. 

- Wireless Pairing
- White Balance adjustment
- RS-232C functionality check
- Factory Option setting per destination
- EYE-Q Test
- Ship-out mode setting (In-Stop)

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

- ADC Comp 480i / ADC Comp 1080p

=> Select component 480i signal that is same as the

image below on the Media-Box with using Pattern
Generator(MSPG-925FA or etc)

- Adjustment ADC RGB

- Image

4.1.3. Adjustment

(1) Adjustment method

- Using RS-232, adjust items listed in 3.1 in the other

shown in “4.1.3.(3)”

(2) Adjustment protocol

Ref.) ADC Adj. RS232C Protocol_Ver1.0

(3) Adj. order

- aa 00 00  [Enter ADC adj. mode]
- xb 00 04  [Change input source to Component1]
- ad 00 10  [Adjust 480i Comp1]1
- xb 00 60  [Change input source to RGB-DTV]
- ad 00 10  [Adjust 1080p Comp1/RGB]
- ad 00 90  End adj.

- 9 -

Protocol

Command

Set ACK

Enter adj. mode

aa 00 00

a 00 OK00x

Source change

xb 00 40

b 00 OK40x (Adjust 480i Comp1 )

xb 00 60 

b 00 OK60x (Adjust 1024*768 RGB)

Begin adj.

ad 00 10

Return adj. result

OKx (Case of Success)

NGx (Case of Fail)

Read adj. data

(main)

(main)

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.

aa 00 90

a 00 OK90x