LG Electronics 20LS7D(C)-UB service manual Adjustment of White Balance, Required Equipment

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7. Adjustment of White Balance

7-1. Required Equipment

(1)Color analyzer (CA-100 or CA210 similar product)

(2)Automatic adjustor (with automatic adjustment necessity and the RS-232C communication being possible)

7-2. Connection Diagram of Equipment

for Measuring (Automatic Adjustment)

Full White Pattern

COLOR

ANALYZER

TYPE; CA-210+

<Fig. 3> Connection Diagram of Automatic Adjustment

*RS-232C Command (Automatic Adjustment)

 

RS-232C COMMAND

 

 

CENTER

Max

 

[CMD ID DATA]

Min

(DEFAULT)(Decimal)

(Deci

 

 

 

 

 

 

 

 

mal)

 

Cool

Mid

Warm

 

Cool

Mid

Warm

 

 

 

 

 

 

 

 

 

R Gain

Jg

Ja

Jd

00

 

 

 

192

 

 

 

 

 

 

 

 

 

G Gain

Jh

Jb

Je

00

 

 

 

192

 

 

 

 

 

 

 

 

 

B Gain

Ji

Jc

Jf

00

 

 

 

192

 

 

 

 

 

 

 

 

 

R Cut

 

 

 

 

64

64

64

 

 

 

 

 

 

 

 

 

 

G Cut

 

 

 

 

64

64

64

 

 

 

 

 

 

 

 

 

 

B Cut

 

 

 

 

64

64

64

 

 

 

 

 

 

 

 

 

 

7-3. Adjustment of White Balance(manual)

(1)Enter ‘Ez - Adjust’ by pressing ADJ KEY on the Service Remote Control.

(2)Select "9. TEST PATTERN" using CH +/- Key and HEAT RUN at least 30 minutes by pressing the ENTER Key.

(3)Calibrate of the CA100+, then attach sensor to LCD module surface when you adjust.

(4)After attaching sensor to center of screen, select ‘6. White- Balance’ of ‘Ez - Adjust’ by pressing the ADJ KEY on the Service R/C. Then enter adjustment mode by pressing the Right KEY (G).

(5)Set test-pattern on and display inside pattern. Control is carried out on there color temperature, COOL, MEDIUM, WARM.

*Fix all color temperature to 64.

*Color Temperature: Cool, Medium, Warm

1.When R GAIN is set to 192

-Control G GAIN and B GAIN by lowering from 192.

2.When B GAIN is set to 192

-Control R GAIN and G GAIN by lowering from 192.

3. When G GAIN is set to 192

- Control R GAIN and B GAIN by lowering from 192.

One of R Gain / G Gain / B Gain should be kept on 192, and adjust other two lower than 192.

(When R/G/B GAIN are all 192, it is the FULL DYNAMIC Range of Module)

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Contents LCD TV Contents Do not use a line Isolation Transformer during this check General GuidanceServicing Precautions Small-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementPower Output, Transistor Device Removal/Replacement Diode Removal/ReplacementGeneral SpecificationTV SpecificationApplication range Test method White Chroma & BrightnessComponent Video Input Y, CB/PB, CR/PR RGB input PC/DTV Mechanical specificationApplication Object Adjustment InstructionSet Method ADC-Set AdjustmentRequired Test Equipment Preparation for Adjustments & Setting of Device23LS7D-UB Hdmi 23LS7D-UB RGBRequired Equipment Adjustment of White BalanceTV/CATV doesnt display TroubleshootingVideo doesnt display Component doesnt display Rgbpc doesnt display Hdmi doesnt display LCD Exploded View Exploded View Parts List Replacement Parts List Description / Specification C1608C0G1H220JT 22pF 5% 50V C0G -55TO+125C DIODEs TRANSISTORs & FETs ICsRESISTORs MNR04M0APJ680 68OHM 5% 1/16W 4P 8P R1185 R4007 0RJ1001C678 R4147 R6031 SWITCHes CONNECTORsCOILs & FILTERs & INDUCTORs JACKsLED,DIP BL-BUBGE301 Round 3MM OTHERsPage Page Mar