Adjustment Instruction - LG 42LG30 Service Manual

1. Application Object
These instructions are applied to all of the LCD TV, LA85D.
2. Notes
(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.
(6) Perform preliminary operation after receiving 100% White
Pattern (06CH). (Or 3. White Pattern status of Ez-Adjust)
(7) White Pattern entry method
1) Enter into Ez-Adjust by pressing the ADJ key on the
adjustment R/C.
2) 100% FULL WHITE PATTERN appears if pressing the
A
OK ( ) key after selecting the 3.WHITE PATTERN with
the CH + / - KEY.
* It is possible to heat run the set without a separate
signal generator in this mode.
Caution : Care must be taken as afterimage phenomena
may occur about the black level part of screen If leaving
pause image turned on for more than 20 minutes
(especially inner digital pattern (13 CH), Cross Hatch
Pattern (09CH) with significant black/white contrast).
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes

ADJUSTMENT INSTRUCTION

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3. ADC-Set Adjustment
3-1. PC input ADC
3-1-1 Auto RGB Gain/Offset Adjustment
• Convert to PC in Input-source
I2C COMMAND: 0xF4 (SELECT_INPUT) 0x00 0x60 (RGB)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT), 0x60(RGB),
0x90(HDMI)
• Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
Pattern : 29 in Pattern Generator (MSPG-925 SERISE)
[gray pattern that left & right is black and center is white signal
(Refer below picture)].
Adjustment pattern(PC )
• Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction.
3-1-2 Confirmation
• We confirm whether "0xB6(RGB)" address of EEPROM
"0xA2" is "0xAA" or not.
• If "0xB6(RGB)" address of EEPROM "0xB2" isn't "0xAA", we
adjust once more
• We can confirm the ADC values from "0xB0~0xB5(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 " 0. ADC
CALIBRATION".
EZ ADJUST
0. ADC CALIBRATION
1. ADC ADJUST
2. SUB B/C ADJUST
3. W/B ADJUST
4. WHITE PATTERN
5. 2HOUR OFF
6. OAD
7. UART DOWNLOAD
8. FACTORY MODE
9. DEBUG MODE
: RGB
: OFF
: ON
: ON
: OFF
LGE Internal Use Only