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VERTICAL IMAGE POSITION, VERTICAL IMAGE AMPLITUDE AND SIDE PIN DISTORTION ADJUSTMENTS (NTSC/PAL OVERSCAN 16:9 MODE)
Measuring Instruments
Card (Slot)
Test Points
Adjustment Points
Notes: • Perform the following adjustments after completing the Reference Mode (NTSL/PAL overscan 4:3 mode) adjustment.
• The data adjusted for the reference mode becomes the reference value for the NTSC/PAL underscan 4:3 mode and NTSC/PAL
overscan/underscan 16:9 modes. When the data of the reference mode is changed, it is required to re-adjust the underscan data
and NTSC/PAL overscan/underscan 16:9 mode data for the same adjustment signal.
• The corner distortions (W) & (S), parallelogram distortion, trapezoidal distortion and horizontal arc distortion adjustment data
for this adjustment are common to those in the NTSC/PAL overscan 16:9 mode and the NTSC/PAL underscan 16:9 mode adjust-
ments. 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.
1. Apply the NTSC mono-scope signal to INPUT C (Terminal VIDEO1
on the NTSC/PAL Video 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 DW02 in the Service Menu to set the vertical position of the
image at the center of the CRT screen.
5. Adjust DW01 to set the vertical amplitude of the image to 193mm.
6. Apply the NTSC crosshatch signal to INPUT C.
7. Adjust CE08 to optimize the trapezoidal distortion (observe the sec-
ond 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 DW03 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 NTSC mono-scope signal to INPUT C.
14. Ensure that the vertical amplitude of the image is 193mm. If it is
not, adjust DW01 again.
15. Adjust DW02 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 16).
Adjustment
Adjustment
Step No.
Signal
1
NTSC
2
PAL
62
Signal generator (Mono-scope signal, Crosshatch signal)
NTSC/PAL Video Input Card (Slot 2)
DW** (Vertical Size), DW** (Vertical Position), DW** (Side Pin Distortion), CE** (Corner Distortion (W)), CE**
(Corner Distortion (S)), CE** (Parallelogram Distortion), CE** (Trapezoidal Distortion), CE** (Horizontal Arc
Distortion) [Service Menu]
Vertical
Vertical
Position
size
Distortion
DW02
DW01
DW08
DW07
90
80
Adjustment Data
Side Pin
Corner
Corner
Distortion (W) Distortion (S)
DW03
CE05
CE06
DW09
CE10
CE11
Table 16
Screen size
90
80
80
90
Make these lines linear.
Parallelogram Trapezoidal
Distortion
Distortion
CE07
CE08
CE12
CE13
193mm
Horizontal
Arc Distortion
CE09
CE14
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