LG PE/PL-43, Service Manual, Page: 13 / 73

O
Lens Focus & Electronic Focus Adjustment
1. Preliminary steps
1) Electronic focus,Raster slope & Raster position must be pre-
adjusted.
2) Heat-run over 60 minutes.
3) Receive Crosshatch pattern.
4) Adjustment must be operated in a dark room(simple dark
room) and pay attention not to touch the lens during
adjustment.
5) Screen the optional two lens with a cover so that the single
color is appeared on the screen.
6) When turn the light the lens at front, chromatic aberration
which appeared in bright line of cross-Hatch signal changed
as below.
2. G-lens Adjustment
1) Turn the lens until the chromatic aberration changed Blue to
Red point.
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 aberration's bright line
isn't equal, adjust G-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 G-focus control volume of focus pack so that the
external big circle's part appeared cleary.
5) Adjust accurately by repeat the upper control.
6) Especially, noting to the G-light because it influenced on
picture's function.
3. R-lens Adjustment
1) Turn the lens until the chromatic aberration changed orange
to scarlet.
2) Adjust the chromatic aberration so that it located center
correctly.
3) Switching the signal to 13CH and adjust it as same method
of G-lens.
4) Adjust as same method of G-lens with Red focus control
volume of focus pack.
4. B- lens Adjustment
1) Turn the lens until the chromatic aberration changed purple
to green which of 3.5 Cross-Hatch part from picture's center
toward left.
2) Adjust the chromatic aberration become center of purple and
green.
Note) After adjustment Red,Green & Blue lens, remove lens
cover and receive Cross-Hatch pattern and check the overall
focus. If need, repeat above.
O
Convergence Adjustment
1. Preliminary steps
1) This adjustment should be performed after raster slant,
raster position, horizontal and vertical adjustment.
2) This adjustment should be performed after warming up 60
minutes.
3) Do it always with crosshatch pattern.
4) Adjust for both PAL and NTSC system.
5) Use the jig screen with the cross hatch pattern for each
mode.
2. Convergence Key
1) Convergence Mode : SVC,
2) Cursor shift :
F
,
G
,
D
,
E
3) Cursor Movement/Adjustment Selection : OK
4) Cursor Color Selection : TV/AV
5) Adjustment mode out :
Note) When cursor flickers, its adjustment mode, and when
quiescent, its cursor movement mode.
O
Mode Adjustment
1. Preliminary steps
Press the buttons SVC & of Remote Controller for
adjustment to get into the convergence adjustment mode.
2. Horizontal/Vertical phase Adjustment
1) Press the buttons 9 & 5 to get into the phase adjustment
mode.
2) Horizontal Phase Adjustment.
Press the volume
F
/
G
button and move the convex part
to the middle of TV screen.
3) Vertical Phase Adjustment
Press the channel
D
/
E
button and move the convex part
to the middle of TV screen.
4) Press the OK button to escape from the adjustment.
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CHROMATIC
ABERRATION
CROSS HATCH
SIGNAL
Lens
Red
Green
Blue
Change of chromatic aberration
Orange
¤A
Scarlet
Blue
¤A
Red
Purple
¤A
Green
M
M
M