LG RE-44NA14T Service Manual page 16

8) PIN PH : Horizontal Trapezoid Fixation
Adjust the horizontal width of screen upper and lower is
to be same.
9) PIN AM : Horizontal PARABOLA Correction
Adjust the vertical line of most angle lattice of right/ left
of screen to be balance with vertical line of center of
screen.
10) V LIN : Vertical Linearity Adjustment
Adjust the vertical size of the screen to be same with
upper and lower.
11) S CORR : S Correction
Adjust the each lattice width Top/Center/Bottom of
screen to be identical.
12) UP CPI : Upper Pincushion Correction
Adjust the pincushion of upper of screen
13) LO CPI : Lower Pincushion Correction
Adjust the pincushion of lower of screen
14) After adjustment complete, exit the RASTER
adjustment mode using ENTER key and exit the SVC
adjustment mode using INSTART key.
Fifth Vertical BAR
Lens Focus & Electronic Focus Adjustment
O
1. Preliminary steps
1) Electronic focus,Raster slope & Raster position must be pre-
adjusted.
2) Heat-run over 60 minutes.
3) Receive Crosshatch pattern.
(PAL:EU07(PR 8) or NTSC:09CH(PR 13))
* Note: Loosen the butterfly nut in the lens tub slightly,being
careful that it is mot loosened to the point that the lens can
move out of focus.
4) Adjustment must be done in a dark room(simple dark room)
Be careful not to touch the lens during adjustment.
5) Make any one color raster using lens covers.
6) Rotating lens right from the front side chromatic haze occurs
beside Cross-hatch line changes as follows;
Fig. 3
Lens Change of chromatic aberration
Red Orange ¤AScarlet
Green Blue ¤ARed
Blue Purple ¤AGreen
2. G-lens Adjustment
1) Rotate the lens until the chromatic haze changes from blue to
red.
2) Viewing the all screen, in no case of the chromatic aberration
appeared slimly within 3.5 cross-Hatch of the picture center. At
this time, in case that the red chromatic aberrations bright line
isn't equal, adjust Green lens so that the red chromatic
aberration is appeared more than previous time.
3) Switching the signal to 13CH and operate adjustment
minutely.
4) Adjust Green focus control volume of focus pack so that the
external big circle's part appeared clearly.
5) Adjust accurately by repeat the upper control.
6) Especially, noting to the Green light because it influenced on
picture's function.
3. R-lens adjustment
1) Rotate the RED lens until the chromatic haze changes from
orange to scarlet.
2) Adjust to appear Red chromatic aberration in right 3.5 cross-
hatch section at center screen.Adjust the chromatic
aberration so that it located center correctly.
3) Switching the signal to 13CH and adjust it as same method of
Green lens.
4) Adjust as same method of Green lens with Red focus control
volume of focus pack.
4. B- lens adjustment
1) Rotate the lens until the chromatic aberration of 3.5 Cross-
Hatch left from center point changes from Violet to Green.
Adjust the chromatic aberration to be center point between
violet and green.
2) Adjust as same as method of Green lens with Red focus
control volume of focus pack.
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CHROMATIC
ABERRATION
CROSS HATCH
SIGNAL