LG DU-42PX12X Service Manual page 11

7. Adjustment of White Balance
7-1. Required Equipment
(1) Color analyzer (CA-100 or similar product)
(2) Automatic adjustor (with automatic adjustment hour
necessity and the RS-232C communication being possible)
(3) AV Pattern Generator
7-2. Connection Diagram of Equipment for
Measuring
(Automatic Adjustment)
High Light Adjustment
Low Light Adjustment
<Fig 4> Connection Diagram of Automatic Adjustment
7-3. Adjustment of White Balance
Operate the Zero-calibration of the CA-100, then attach
O
sensor to PDP module surface when you adjust.
O Manual adjustment is also possible by the following sequence.
(1) Enter 'Ez - Adjust' by pressing ADJ KEY on the Service
Remote Control.
(2) Select "7. WHITE PATTERN" using CH +/- Key and HEAT
RUN at least 15 minutes by pressing the ENTER Key.
(3) Receive the Window pattern signal from AV Pattern
Generator. (AV Input)
(4) Set Picture condition to "CLEAR Image" and 'XD' off
(5) After attaching sensor to center of screen, select '3. 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) .
(6) Adjust the Hight Light using R Gain/B Gain and adjust the
Low Light using G Cut/B Cut.
(7) Adjust using Volume +/- KEY.
(G Gain : 123 / R Cut : 63(Fix.))
Hight Light : 150±10 Cd
Low Light : 5±2 Cd
X; 0.285±0.003
Y; 0.285±0.003
Color temperature: 9,000°K±500°K
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ADJUSTMENT INSTRUCTIONS
Signal Input
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(8) After adjustment is complete, move to Ez - Adjust screen by
pressing the ENTER(Y) KEY. Then exit the adjustment mode
by press ADJ KEY.
7-4. Main/Sub Contrast Adjustment
Main/Sub contrast adjustment reduces the contrast difference
of Main/Sub screen in PIP/POP/SPLIT Screen.
(1) After receiving signal for at least 1 second, press the ADJ
KEY on the Service R/C and enter the 'Ez - Adjust' then
select '2. VPX3226'.
Enter adjustment mode by pressing the Right KEY(G).
(2) When entering adjustment mode, the image TV becomes
6CH SPLIT Screen with automatic movement as in below
window.
(3) The contour of "US 6CH" letter of left Main screen is most
clear and it is clear, 1.Contrast (Main) after adjusting first,
in order for right side Sub screen to contrast to become the
left Main screen to contrast with same, 2.Contrast (Sub) it
adjust. This time adjust using the volume +/- Key.
(4) After adjustment is complete, exit the adjustment mode by
press ADJ KEY.
7-5. DVCO Adjustment
(1) After adjusting Main/Sub Contrast, receive a Digital
Pattern.
(2) Select '4. DVCO-Set' by pressing the ADJ KEY on the
Service R/C and adjust by pressing the Right KEY (G) .
(3) When adjustment is complete,"DVCO-Set" will appear. Exit
the adjustment mode menu by pressing ADJ key.