White Balance Adjustment - LG 52SX4D Service Manual

18. White Balance Adjustment

(Day Light Mode) : R fixation
18-1. Required Test Equipment
CA210 or equivalent equipment.
18-2. Adjustment Sequence
(1) Install the equipment(CA210) be 5cm away from the
screen center.
(2) Select White balance by pressing ADJ Mode Key on the
Service Remote control.
(3) Medium(9300cK) : x = 0.283, y = 0.297
1) R Gain 110 fixation
2) Adjust white balance changing G, B gain.
3) Offset fixation R/G/B --> -7, -3, -3
(4) Cool(12000cK) : x = 0.275, y = 0.277
1) R Gain 110 fixation
2) Adjust white balance changing G, B gain.
3) Offset fixation R/G/B --> -8, -3, -9
(3) Warm(6500cK) : x = 0.313, y = 0.320
1) R Gain 111 fixation
2) Adjust white balance changing G, B gain.
3) Offset fixation R/G/B --> -14, -4, -5
* Reference : Gamma table -> 4
Spoke Func. -> 0
Lamp Type -> 2(Flatter Free)
DMD Bin -> E
19. Main/Sub Contrast Adjustment
Adjust which it sees last prosecuting attorney time the screen
contrast difference.
Basically the letter does with the fact that the character and
distinction becomed.
19-1. Preparation for Adjustment
(1) Receive a RF test signal on the Main/Sub screen in twin
picture mode.
(2) Set Picture control to "Daylight".
19-2. Adjustment
(1) Main Screen Adjustment
1) Select the VPX3226 by pressing "ADJ" key on the
Service Remote Control.
2) Select Contrast(m) in the adjustment menu using CH +/-
keys and adjust using VOL +/- keys. (Initial data: 32)
(2) Sub Screen Adjustment
1) Select the VPX3226 by pressing "ADJ" key on the
Service Remote Control.
2) Select Contrast(s) of adjustment item using CH +/-keys
and adjust using VOL +/- keys. (Initial data: 32)
ADJUSTMENT INSTRUCTIONS
19-3. Overseas Factory Production
Contrast Adjustment Method
Adjust which it sees last prosecuting attorney time the screen
contrast difference.
(1) Do the same method as above method.
(2) Make the as same below pattern in VHF 6CH using RF
MODULATOR and PATTERN GENERATOR.
(3) Adjust to become dividing 15 and 16 Gray of Main/Sub
screen .
(4) Adjust to be identical Main/Sub contrast of MAX 16Gray.
(5) Make the adjustment pattern as below.
<Fig. 20> 16Gray Scale/H Pattern
- 22 -