15LS1RA (CHASSIS:LN71A) - LG TV Service Manual (repair manual). Page 10

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2) Confirmation

(a) We confirm whether “0x8C” address of EEPROM

“0xB4” is “0xAA” or not.

(b) If “0x8C” address of EEPROM “0xB4” isn’t “0xAA”,

we adjust once more.

(c) ADC result is displayed to “OK” or “NG” on left and

lower of the screen.

(d) We can confirm the ADC values from “0x00~0x05”

addresses in a page “0xB4”.

1) Auto Component Gain/Offset adjustment

a) Convert to Component in Input-source 
b) Signal equipment displays

Output Voltage  :  700  mVp-p
Impress Resolution : Component  480p.
Pattern: 8color & 16gray pattern(Refer below picture).
(Model:212, Pattern: 8 at MSPG925L)

c) Adjust by commanding AUTO_COLOR_ADJUST

(0xF1) 0x00 0x02 instruction.

2) Confirmation

a) We confirm whether “0x8E” address of EEPROM

“0xB4” is “0xAA” or not. 

b) If “0x8C” address of EEPROM “0xB4” isn’t “0xAA”, we

adjust once more

c) ADC result is displayed to “OK” or “NG” on left and

lower of the screen.

d) We can confirm the ADC values from “0x00~0x05”

addresses in a page “0xB4”.

* Manual ADC process(using Service Remocon)

- RGB & Component Mode

After enter Service Mode by pushing “INSTART” key,
execute “Auto-RGB” by pushing “_” key at “Auto-RGB”

Before : “ADC RGB-NA” “ADC CPNT-NA”
After : “ADC RGB-OK” “ADC CPNT-OK”

- Check Input and Signal items
1) TV
2) Video (CVBS/ S-Video)
3) Component (YPbPr)
4) RGB (PC : 1024 x 768@60Hz) - 15” only

* Display and Sound check is executed by Remote control.

(1) Above 30 minutes Heat-run in RF no signal 
(2)15 Pin D-Sub Jack is connected to the signal of Pattern

Generator.

-15” only

(1) Set Input to RGB
(2) Input signal : XGA(1024 x768 @ 60Hz), Full white 216/255

gray level (85 IRE, Model : 60, Pattern : 78 at MSPG925L)

(3) Set CSM : Cool
(4) Confirm whether x=0.276±0.03, y=0.283±0.03, y

≥180

or not.

(1) Set Input to Video.
(2) Input signal : CVBS, NTSC @ 60Hz

Full White 216/255 gray level (85 IRE, Model : 201 
Patter : 78 at MSPG925L)

(3) Set APC : Clear / ACC : Cool
(4) Confirm whether x = 0.276±0.03, y = 0.283±0.03, y ≥ 180

(15”)/ Y ≥ 250(20”) or not.

(1) Set Input to Component.
(2) Input signal : Component(YPbPr), 480P

Full White 216/255 gray level and 480P
(Model : 212  Patter : 78 at MSPG925L)

(3) Set APC : Clear / ACC : Cool
(4) Confirm whether x = 0.276±0.03, y = 0.283±0.03, y ≥ 180

(15”)/ Y ≥ 250(20”) or not.

(1) Confirm that each items satisfy under standard condition

that was written product spec.

(2) Confirm Video and Sound at each source.

1) Video

(a) Select input Video(S-video) and check whether

picture is displayed or not.

(b) Select input Video(CVBS) and check whether picture

is displayed or not.

(c) Select input Component 480P and check whether

picture is displayed or not.

2) TV : Select input TV and check below item.(In Gumi factory)

CH04 (US-04) - Stereo Sound Check
CH30 (US-30) - Dual Sound Check
CH02 (US-02) - Stereo, SAP Sound Check

- Caption Check

3) RGB(PC/DTV) - 15” only

Select input RGB and check whether picture is
displayed or not.

4) Component

Select input component and check whether picture is
displayed or not.

Auto

Color Balance

ADC

RGB0OK CPNT-OK

Auto-RGB

To set

Red Offset

xxx

Green Offset

xxx

Blue Offset

xxx

Red Gain

xx

Green Gain

xx

Blue Gain

xx

Reset

To set