55LEX8-ZA (CHASSIS:LD03S) - LG TV Service Manual (repair manual). Page 10

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(2) LAN PORT inspection  (PING TEST)

1) Play the LAN Port Test Program.
2) Connect each other LAN Port Jack.
3) Play Test (F9) button and confirm OK Message.
4) Remove LAN CABLE.

(1) Model name & Serial number D/L

- Press “Power on” key of service remote control.(Baud

rate : 115200 bps)

- Connect RS232 Signal Cable to RS-232 Jack.
- Write Serial number by use RS-232.
- Must check the serial number at Instart menu.

(2) Method & notice

1) Serial number D/L is using of scan equipment.
2) Setting of scan equipment operated by Manufacturing

Technology Group.

3) Serial number D/L must be conformed when it is

produced in production line, because serial number D/L
is mandatory by D-book 4.0

* Manual Download (Model Name and Serial Number)

If the TV set is downloaded by OTA or service man,
sometimes model name or serial number is initialized.(Not
always)
There is impossible to download by bar code scan, so It
need Manual download.
a. Press the ‘instart’ key of ADJ remote control.
b. Go to the menu ‘5.Model Number D/L’ like below photo.
c. Input the Factory model name(ex 42LD450-ZA) or Serial

number like photo.

d. Check the model name Instart menu -> Factory name

displayed (ex 42LE7500-ZA)

e. Check the Diagnostics (DTV country only) -> Buyer model

displayed (ex 42LE7500-ZA)

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

(1) Adjust Remote control
(2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern

Generator

- Resolution :

480i, 720*480 (MSPG-925FA -> Model: 209, Pattern: 65)
- 480i
1080p, 1920*1080 (MSPG-925FA -> Model: 225, Pattern:
65) - 1080p

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

(3) Must use standard cable

(1) ADC 480i, 1080p Comp1

1) Check connected condition of Comp1 cable to the equipment
2) Give a 480i, 1080p Mode, Horizontal 100% Color Bar

Pattern to Comp1.

(MSPG-925FA -> Model: 209, Pattern: 65) - 480i
(MSPG-925FA -> Model: 225, Pattern: 65) - 1080p 

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 1080p 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 calibration Error message refer to 5).

(2) ADC 1920*1080 RGB

1) Check connected condition of Component & RGB cable

to the equipment

2) Give a 1920*1080 Mode, 100 % Horizontal Color Bar

Pattern to RGB port.

(MSPG-925 Series -> model: 225 , pattern: 65 ) 

3) Change input mode as RGB 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 1080p 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 calibration Error message refer to 5).