ELE-45
HORIZONTAL/VERTICAL IMAGE POSITION, IMAGE AMPLITUDE AND IMAGE DISTORTION ADJUSTMENTS (SDTV OVERSCAN 4:3 MODE)
(1) Apply the 480/60i 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
DE04
in the Service Menu to set the vertical position
of the image at the center of the CRT screen.
(4) Adjust the vertical image amplitude with
DE02
to match the
95% line of the size adjustment signal onto the edge of the
escutcheon.
(5) Apply the 480/60i crosshatch signal to INPUT A.
(6) Adjust
DE11
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
DE12
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
DE04
again.
(9) Adjust
DE11
,
DE12
and
DE04
repeatedly until the center
position and vertical linearity are optimized.
(10) Adjust
DE09
to optimize the trapezoidal distortion (observe
the second vertical lines from the left and right edges as the
reference).
(11) Adjust
DE08
to optimize the parallelogram distortion (observe
the second vertical lines from the left and right edges as the
reference).
(12) Adjust
DE10
to optimize the horizontal arc distortion.
(13) Adjust
DE05
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
DE07
to optimize it (this adjustment is usually unnecessary).
(15) If there is an extreme corner W-shape distortion, adjust
DE06
to optimize it (this adjustment is usually unnecessary).
(16) Apply the 480/60i size adjustment signal to INPUT A.
(17) Observe the vertical amplitude of the image. If it is dislocated,
adjust
DE02
again.
(18) Adjust
DE03
so that the horizontal position of the image
comes at the center of the CRT screen.
(19) Adjust the horizontal image amplitude with
DE01
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 10).
Make these lines linear.
Escutcheon
Escutcheon
95% line
95% line
Screen size
Adjustment
Adjustment
Adjustment
Step No.
signal
Data
1
480/60i
DE
2
480/60p
DI
3
576/50i
DG
4
576/50p
DK
Table 10
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]
Содержание BT-H1700BMC
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