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2.11 TRAPEZOID DISTORTION ADJUSTMENT
Adjustment Preparation
(1) VIDEO control should be set Factory Preset condition.
(2) HORIZONTAL SIZE adjustment should be finished.
(3) Place the set facing East.
Adjustment Procedure
(a) PAL INTERLACE MODE Item no.16
(1)
Input any PAL signal.
(2)
Press [MENU] key.
(3)
Choose Function and scan, set to 100i mode.
(4)
Press [MENU] key twice to exit from [FUNCTION].
(5)
Press and hold the SERVICE ONLY SW. on
CONV./FOCUS P.W.B. and [MUTE] key of Handset.
Green DCU cross-hatch are appeared with Conv.
Data cleared.
(6)
Press the TV/Video button on the control panel, then
SERVICE MENU appears.
(7)
Choose TRAPEZOID item by using Handset up/down
cursor key.
(8)
Adjust TRAPEZOID as following by using Handset
left/right cursor key.
(9)
Press "MUTE" key of handset to write the data.
(10) After adjustment, press SERVICE ONLY SW. for exit
from SERVICE mode.
(b) PAL 50Hz PROGRESSIVE MODE Item no. 20
(1) Input any PAL signal.
(2) Press [MENU] key.
(3) Choose [FUNCTION] and scan, set to 50P mode.
(4) Press [MENU] key twice to exit from [FUNCTION].
(5) Adjust the same items as (5)-(10) of setting PAL 100i IN
TERLACE MODE.
(c) NTSC PROGRESSIVE MODE Item no.24
(1) Input any NTSC signal.
(2) Adjust the same items as (5)-(10) of setting PAL 100i
INTERLACE MODE.
Vertical Screen frame line & edge of vertical DCU cross-
hatch line should be
parallel condition.
Note:
Please do this adjustment follow sequence:
PAL 100i --! ! ! ! PAL Progressive -! ! ! ! NTSC Progressive
2.12
BEAM FORM ADJUSTMENT
Preparation for adjustment
(1) The beam alignment should be completed.
(2) The raster inclination, centering, horizontal
and vertical size adjustments should
be completed. Optical focus should be
coarsely adjusted.
(3) VIDEO control should be set the Factory
Preset condition.
(Contrast : Max, other items : Center)
(4) Input the dot signal.
Adjustment procedure
(1) Green PRT beam shape adjustment
Short-circuit 2P sub-mini connectors on
Red and Blue CPT P.W.B. to project only
the green beam.
(2) Turn the green static VR*
Note : Blooming
(3) Using the 4-pole magnet as shown below,
modify the dot pattern of the screen
center to make it to a perfect circle.
(4) Repeat the procedure for the Red*
3
Blue*
PRT beam shapes.
(5) After the adjustment is completed, return R,
G and B static VRs to the best focus point.
(6) After the beam alignment is completed, fix
the beam alignment magnet with white
paint.
*
1
*
Static Focus VR is on
2
*
focus pack UFPK
3
4-pole beam shape
correction magnet
2-pole beam alignment
magnet
True circle specification
a
1
fully clockwise.
2
and
PRT surface side
PRT E. gun side
True circle Form
Ratio: a/b
Specification :
0.9~1.1
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