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DP-4X BEAM FORM ADJUSTMENT
BEAM SHAPE (FORM)
Preparation for adjustment
• IMPORTANT: Screen format
should be "NORMAL".
• Pre Heat, Cut-Off, Pre-optical
focus, DCU Phase Data, H.
Pos Course, Raster Tilt, Beam
Alignment, Raster Position,
Vertical and Horizontal Size
adjustment should be com-
pleted.
• Brightness: 90%, Contrast:
Max.
• Input a NTSC DOT signal.
a
Figure 1
Adjustments procedure:
1) Green CRT beam shape
adjustment.
2) Short-circuit 2P sub-mini
connectors on Red and Blue
CRT PWB to project only the
Green beam.
3) Turn the green static focus
VR fully clockwise.
4) Make the dot at the screen
center a true circle, using the
4-Pole magnet shown in
Figure 2 below.
PICTURE TUBE SIDE
b
5) Also adjust the Red and Blue
CRT beam shapes according
to the steps (1) to (4).
6) After the adjustment is
completed, return R, G and B
static VRs to the Best Focus
point.
ADJUSTMENT
TABS
4-POLE BEAM SHAPE
CORRECTION MAGNET
ZERO FIELD SPACER
(NO ADJUSTMENT)
2-POLE BEAM
ALIGNMENT MAGNET
Figure 2
PAGE 08-11
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