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1-56 (No. 52152)
Adjustment
Adjustment
Adjustment
Step No.
signal
Data
1
1080/60i
DN
2
1080/50i
DR
3
1080/24psF
DT
4
720/60p
DV
5
720/50p
DX
HORIZONTAL/VERTICAL IMAGE POSITION, IMAGE AMPLITUDE AND IMAGE DISTORTION ADJUSTMENTS (HDTV UNDERSCAN 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]
Note:
•
Perform the following adjustments after completing
the Reference Mode (HDTV overscan mode)
adjustments.
(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) Press the UNDER SCAN button on the front panel to set
the scanning size to underscanning.
(4) Adjust
DN04
in the Service Menu to set the vertical position
of the image at the center of the CRT screen.
(5) Adjust
DN02
to set the vertical amplitude of the image to
175mm
.
(6) Apply the 1080/60i crosshatch signal to INPUT A.
(7) Adjust
DN11
to set the sizes of the rectangles at the center
of the image and those at the left and right ends to be
identical.
(8) Adjust
DN12
to set the sizes of the rectangles at the center
of the image and those at the top and bottom to be identical.
(9) Ensure that the center position is not deviated. If it is, adjust
DN04
again.
(10)Adjust
DN11
,
DN12
and
DN04
repeatedly until the center
position and vertical linearity are optimized.
(11) Adjust
DN09
to optimize the trapezoidal distortion (observe
the second vertical lines from the left and right edges as the
reference).
(12)Adjust
DN08
to optimize the parallelogram distortion
(observe the second vertical lines from the left and right
edges as the reference).
(13)Adjust
DN10
to optimize the horizontal arc distortion.
(14)Adjust
DN05
so that the second vertical lines from the left
and right edges are linear.
(15)If there is an extreme corner S-shape distortion, adjust
DN07
to optimize it (this adjustment is usually unnecessary).
(16)If there is an extreme corner W-shape distortion, adjust
DN06
to optimize it (this adjustment is usually unnecessary).
(17)Apply the 1080/60i size adjustment signal to INPUT A.
(18)Ensure that the vertical amplitude of the image is
175mm
. If
it is not, adjust
DN02
again.
(19)Adjust
DN03
so that the horizontal position of the image
comes at the center of the CRT screen.
(20)Adjust
DN01
to set the horizontal amplitude of the image to
311mm
.
(21)Vary the adjustment signal and adjustment data, and re-
perform adjustments in steps 1 to 20 above (see Table 9).
175mm
311mm
Make these lines linear.
Escutcheon
Scanning size (100%)
Screen size
Table 9