ELE-43
HORIZONTAL/VERTICAL IMAGE POSITION, IMAGE AMPLITUDE AND IMAGE DISTORTION ADJUSTMENTS (HDTV OVERSCAN MODE)
Measuring Instruments
Signal generator (Size adjustment signal, Crosshatch signal)
Card (Slot)
Component/RGB Input Card (Slot 1)
Test Points
Adjustment Points
D*01 (Horizontal Size), D*02 (Vertical Size), D*03 (Horizontal Position), D*04 (Vertical Position),
D*05 (Side Pin Distortion), D*06 (Corner Distortion (W)), D*07 (Corner Distortion (S)), D*08
(Parallelogram Distortion), D*09 (Trapezoidal Distortion), D*10 (Horizontal Arc Distortion), D*11
(Vertical Linearity (S Correction)), D*12 (Vertical Linearity (C Correction)) [Service Menu]
(1) Apply the 1080/60i size adjustment signal to INPUT A
(Terminal Y on the Component/RGB Input Card).
(2) Set the CONTRAST and BRIGHT potentiometers on the
front panel to the center click positions.
(3) Adjust
DM04
in the Service Menu to set the vertical position
of the image at the center of the CRT screen.
(4) Adjust
DM02
to set the vertical amplitude of the image to
193mm
.
(5) Apply the 1080/60i crosshatch signal to INPUT A.
(6) Adjust
DM11
to set the sizes of the rectangles at the center
of the image and those at the left and right ends to be
identical.
(7) Adjust
DM12
to set the sizes of the rectangles at the center
of the image and those at the top and bottom to be identical.
(8) Ensure that the center position is not deviated. If it is, adjust
DM04 again.
(9) Adjust
DM11
,
DM12
and
DM04
repeatedly until the center
position and vertical linearity are optimized.
(10) Adjust
DM09
to optimize the trapezoidal distortion (observe
the second vertical lines from the left and right edges as the
reference).
(11) Adjust
DM08
to optimize the parallelogram distortion
(observe the second vertical lines from the left and right
edges as the reference).
(12) Adjust
DM10
to optimize the horizontal arc distortion.
(13) Adjust
DM05
so that the second vertical lines from the left
and right edges are linear.
(14) If there is an extreme corner S-shape distortion, adjust
DM07
to optimize it (this adjustment is usually unnecessary).
(15) If there is an extreme corner W-shape distortion, adjust
DM06
to optimize it (this adjustment is usually unnecessary).
(16) Apply the 1080/60i size adjustment signal to INPUT A.
(17) Ensure that the vertical amplitude of the image is
193mm
. If
it is not, adjust
DM02
again.
(18) Adjust
DM03
so that the horizontal position of the image
comes at the center of the CRT screen.
(19) Adjust the horizontal image amplitude with
DM01
to match
the 95% line of the size adjustment signal onto the edge of
the escutcheon.
(20) Vary the adjustment signal and adjustment data, and re-
perform adjustments in steps 1 to 19 above (see Table 8).
1.10.10 DEFLECTION SYSTEM ADJUSTMENTS
193mm
Escutcheon
95% line
Make these lines linear.
Screen size
Adjustment
Adjustment
Adjustment
Step No.
signal
Data
1
1080/60i
DM
2
1080/50i
DQ
3
1080/24psF
DS
4
720/60p
DU
5
720/50p
DW
Table 8
Содержание BT-H1700BMC
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