LG Electronics LD84A service manual ADC Process, Function Check, Calibration Component, Hdmi

*After downloading, have to adjust TOOL OPTION again.

1)Push "IN-START" key in service remote controller

2)Select "Tool Option 1" and Punch in the number.(Each model has their number.)

32LG5000-ZA : 8977

3)Completed selecting Tool option

Impress Resolution 1080i

Model : 223 in Pattern Generator(1080i Mode)

Pattern: 65 in Pattern Generator(MSPG-925 series)

3.1.ADC Process

(1)PC input ADC

1)Auto RGB Gain/Offset Adjustment

-Convert to PC in Input-source

-Signal equipment displays Output Voltage : 700 mVp-p

Impress Resolution XGA (1024 x 768 @ 60Hz) Model : 60 in Pattern Generator

Pattern : 65 in Pattern Generator (MSPG-925 Series)

<Fig. 1> Adjustment pattern(PC)

-Adjust by commanding AUTO_COLOR_ADJUST.

2)Confirmation

-We confirm whether “0xAA (RGB)” address of EEPROM “0xA2” is “0xAA” or not.

-If “0xAA (RGB)” address of EEPROM “0xA2” isn’t “0xAA”, we adjust once more

-We can confirm the ADC values from “0xA4~0XA9 (RGB)” addresses in a page “0xA2”

*Manual ADC process using Service Remocon. After enter Service Mode by pushing “ADJ” key,

execute “ADC Adjust” by pushing “G” key at “ADC CALIBRATION: RGB-PC”.

<Fig. 1> Adjustment pattern(COMPONENT)

-Adjust by commanding AUTO_COLOR_ADJUST.

2)Confirmation

-We confirm whether “0xB3 (480i)/0xBC (1080i)” address of EEPROM “0xA2” is “0xAA” or not.

-If “0xB3 (480i)/0xBC(1080i)” address of EEPROM “0xA2” isn’t “0xAA”, we adjust once more.

-We can confirm the ADC values from “0xAD~0XB2 (480i)/0XB6~BB (1080i)” addresses in a page “0xA2”.

*Manual ADC process using Service Remocon. After enter Service Mode by pushing “ADJ” key, execute “ADC Adjust” by pushing “G ” key at “ADC

CALIBRATION :COMPONENT”.

Impress Resolution 480i

Impress Resolution 1080i

(2)COMPONENT input ADC

1)Component Gain/Offset Adjustment

-Convert to Component in Input-source

-Signal equipment displays Impress Resolution 480i

MODEL : 209 in Pattern Generator(480i Mode)

Pattern : 65 in Pattern Generator (MSPG-925 series)

3.2.Function Check

(1)Check display and sound

-Check Input and Signal items. (cf. work instructions)

1)TV

2)AV (SCART1/SCART2/S-VHS/CVBS)

3)COMPONENT (480i)

4)RGB (PC : 1024 x 768 @ 60hz)

5)HDMI

6)PC Audio In

*Display and Sound check is executed by Remote controller.

Copyright © 2008 LG Electronics. Inc. All right reserved.	- 11 -	LGE Internal Use Only
Only for training and service purposes