53
VERTICAL LINEARITY ADJUSTMENT (VERTICAL FREQUENCY: 50Hz)
Measuring Instruments
Signal generator (Size adjustment signal, Crosshatch signal with circle pattern)
Card (Slot)
Component/RGB Input Card (Slot 1)
Test Points
Adjustment Points
DS02 (Vertical Size), DS04 (Vertical Position), DS05 (Side Pin Distortion), DS06 (Corner Distortion (W)),
DS07 (Corner Distortion (S)), DS08 (Parallelogram Distortion), DS09 (Trapezoidal Distortion), DS10 (Hori-
zontal Arc Distortion), DX01 (50Hz Vertical Linearity (S Correction)), DX02 (50Hz Vertical Linearity (C Correc-
tion)) [Service Menu]
Note:
• Perform the following adjustments after completing the
Screen Voltage, X-Ray Protector and High-Voltage adjust-
ments.
1. Apply the 1080/48i (24pSF) size adjustment signal to INPUT A (Ter-
minal Y on the Component/RGB Input Card).
2. Adjust DS04 to set the vertical position of the image at the center of
the CRT screen.
3. Adjust DS02 to set the vertical amplitude of the image to 193mm.
4. Apply the 1080/48i (24pSF) crosshatch signal with circle pattern to
INPUT A.
5. Adjust DX01 to set the sizes of the rectangles at the center of the
image and those at the left and right ends to be identical.
6. Adjust DX02 to set the sizes of the rectangles at the top and bottom
of the image to be identical.
7. Ensure that the center position is not deviated. If it is, adjust DS04
again.
8. Repeat adjustments in steps 1 to 7 until the center position and
vertical linearity become optimum. If the current image distortion is
serious, perform adjustments in steps 9 to 13 before re-performing
steps 1 to 7.
9. Adjust DS05 so that the second vertical lines from the left and right
edges are linear.
10. Adjust DS06 (W) and DS07 (S) to optimize the corner distortions.
11. Adjust DS08 to optimize the parallelogram distortion (observe the
second vertical lines from the left and right edges as the reference).
12. Adjust DS09 to optimize the trapezoidal distortion (observe the sec-
ond vertical lines from the left and right edges as the reference).
13. Adjust DS10 to optimize the horizontal arc distortion.
193mm
Escutcheon
Make these lines liner.
Screen size
Summary of Contents for BT-H1700P
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