ELE-47
VERTICAL IMAGE POSITION, IMAGE AMPLITUDE AND IMAGE DISTORTION ADJUSTMENTS (SDTV OVERSCAN 16:9 MODE)
Measuring Instruments
Signal generator (Size adjustment signal, Crosshatch signal)
Card (Slot)
Component/RGB Input Card (Slot 1)
Test Points
Adjustment Points
DY** (Vertical Size), DY** (Vertical Position), DY** (Side Pin Distortion), CE** (Corner Distortion
(W)), CE** (Corner Distortion (S)), CE** (Parallelogram Distortion), CE** (Trapezoidal Distortion),
CE** (Horizontal Arc Distortion) [Service Menu]
(1) Apply the 480/60i size adjustment signal to INPUT A
(Terminal Y on the Component/RGB Input Card).
(2) Press the ASPECT button on the front panel to set the
scanning size to 16:9 mode.
(3) Set the CONTRAST and BRIGHT potentiometers on the
front panel to the center click positions.
(4) Adjust
DY14
in the Service Menu to set the vertical position
of the image at the center of the CRT screen.
(5) Adjust
DY13
to set the vertical amplitude of the image to
193mm
.
(6) Apply the 480/60i crosshatch signal to INPUT A.
(7) Adjust
CE08
to optimize the trapezoidal distortion (observe
the second vertical lines from the left and right edges as the
reference).
(8) Adjust
CE07
to optimize the parallelogram distortion (observe
the second vertical lines from the left and right edges as the
reference).
(9) Adjust
CE09
to optimize the horizontal arc distortion.
(10) Adjust
DY15
so that the second vertical lines from the left
and right edges are linear.
(11) If there is an extreme corner S-shape distortion, adjust
CE06
to optimize it (this adjustment is usually unnecessary).
(12) If there is an extreme corner W-shape distortion, adjust
CE05
to optimize it (this adjustment is usually unnecessary).
(13) Apply the 480/60i size adjustment signal to INPUT A.
(14) Ensure that the vertical amplitude of the image is
193mm
. If
it is not, adjust
DY13
again.
(15) Adjust
DY14
so that the vertical position of the image comes
at the center of the CRT screen.
(16) Vary the adjustment signal and adjustment data, and re-
perform adjustments in steps 1 to 15 above (see Table 12).
193mm
Make these lines linear.
Screen size
Adjustment
Adjustment
Adjustment Data
Step No.
Signal
Vertical
Vertical
Side Pin
Corner
Corner
Parallelogram Trapezoidal
Horizontal
Position
size
Distortion
Distortion (W) Distortion (S)
Distortion
Distortion
Arc Distortion
1
480/60i
DY14
DY13
DY15
CE05
CE06
CE07
CE08
CE09
2
480/60p
DY26
DY25
DY27
CE15
CE16
CE17
CE18
CE19
3
576/50i
DY20
DY19
DY21
CE10
CE11
CE12
CE13
CE14
4
576/50p
DY32
DY31
DY33
CE20
CE21
CE22
CE23
CE24
Table 12
Notes:
•
Perform the following adjustments after completing the Reference Mode (SDTV overscan 4:3 mode) adjustments.
•
The corner distortions (W) & (S), parallelogram distortion, trapezoidal distortion and horizontal arc distortion adjustment
data for this adjustment are common to those in the SDTV overscan 16:9 mode and the SDTV underscan 16:9 mode
adjustments. This adjustment data needs to be adjusted in either mode.
•
The corner distortions (W) & (S), parallelogram distortion, trapezoidal distortion and horizontal arc distortion adjustment
data for this adjustment are common to those in the 480/60i and NTSC signal or 576/50i and PAL signal adjustments.
This adjustment data needs to be adjusted with either signal.
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