Sony KP-41DS1U Service Manual page 59

GREEN HORIZONTAL QUATERNARY ADJUSTMENT
1. Receive the Internal pattern (crosshatch) signal.
2. Adjust GH 4PIN, to correct the 4th order distortion.
3. Adjust GH 4SBO to balance and correct the 4th order distor-
tion at both edges of the screen.
4. While tracking adjust GH 4PIN and GH 4SBO.
4PIN
GREEN HORIZONTAL ASYMMETRICAL PIN
DISTORTION ADJUSTMENT
1. Receive the Internal pattern (crosshatch) signal.
2. Adjust GH MBOW, so that the pin asymmetry at both sides
of the centre section are symmetrical left and right.
3. Adjust GH SBOW so that the bow at both edges of the screen
is symmetrical left and right.
4. While tracking adjust GH MBOW and GH SBOW so that
the bow of vertical lines over the entire screen is symmetri-
cal.
MBOW
4SBO
4SBO
SBOW
GREEN HORIZONTAL SYMMETRICAL PIN DISTORTION
ADJUSTMENT
1. Receive the Internal pattern (crosshatch) signal.
2. Adjust GH MPIN to correct pin distortion at both edges of
the centre section.
3. Use GH PIN to correct pin distortion at both edges of the
screen.
4. While tracking adjust GH MPIN and GH PIN so that the PIN
of vertical lines on the entire screen have no bowing.
5. If there is asymmetrical distortion after adjustments, read-
just GH MBOW and GH SBOW while tracking.
MPIN
GH PIN
GREEN VERTICAL WAVE (3RD-ORDER) DISTORTION
ADJUSTMENT
1. Receive the Internal pattern (crosshatch) signal.
2. Check the screen at the top & bottom, and look for any 2nd
or 3rd order waveform distortion of horizontal lines. Correct
with GV WAVW.
3. While tracking adjust GV WAVW and GV KEY, if here are
any KEY distortion.
GV WAVW
GV KEY
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KP-41DS1U/PZ1B/PZ1D/PZ1E
PIN
GH MBOW
GH SBOW
GH MPIN
RM-892