Sony KP-41T65C service manual GV 4PIN

GREEN VERTICAL QUATERNARY DISTORTION ADJUSTMENT

1.Correct the quaternary distortion of the horizontal lines at the top and bottom sections of the screen with GV 4PIN.

1)Since there is no 4SBOW for vertical correction, there will be a slight imbalance, but adjust to eliminate the distortion from the horizontal line at either the top or the bottom of the screen.

2)In many cases, the horizontal lines at the top and bottom sec- tions of the screen are not straight lines after the adjustment. As long as the secondary distortion is mild enough that it can be corrected with the PIN adjustment, this is OK.

GV 4PIN

GREEN VERTICAL TRAPEZOIDAL DISTORTION ADJUSTMENT

1.Adjust with GV SSKW so that the tilt of the horizontal lines at the top and bottom sections of the screen is symmetrical about the center position horizontal line.

2.Adjust with GV MKEY so that there is no tilt for the line sections at both sides of the horizontal lines at the center sec- tion of the stream.

3.Adjust with GV KEY so that there is no tilt for the horizontal lines at the top and bottom sections of the screen.

4.While tracking, adjust with GV MKEY and GV KEY so that there is no tilt for the horizontal lines on the entire screen.

5.If the tilt is unbalanced after the GV MKEY and GV KEY adjustment, adjust again with GV SSKW.

GV SSKW

MKEY

KEY

GV SSKW

GV KEY GV MKEY

GREEN VERTICAL ASYMMETRICAL PIN DISTORTION (SECONDARY DISTORTION) ADJUSTMENT

1.Correct the asymmetrical pin distortion at the top and bot- tom sections of the screen with RGV SBOW.

GV SBOW

GREEN VERTICAL ASYMMETRICAL PIN DISTORTION ADJUSTMENT

1.Adjust the pin distortion for both side sections and the center of the screen with GV MPIN.

2.Adjust with GV PIN so that the horizontal lines at the top and bottom sections of the screen are straight lines.

3.Adjust with GV MPIN and GV PIN so that there is no curve in the horizontal lines on the entire screen.

4.After the adjustments in Items 1-3, adjust the tracking with GV SBOW, GV MPIN, and GV PIN.

MPIN

PIN

GV SBOW

GV MPIN GV PIN

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