Philips L04HE Service Manual page 67

• Vertical Amplitude (VA) Align the vertical amplitude so
that the complete test pattern is visible.
• Vertical S-Correction (SC) Align the vertical linearity,
meaning that vertical interval of a grid pattern must be
equal over the entire screen height.
• Vertical Shift (VSH) Align the vertical centring so that the
test pattern is located vertically in the middle. Repeat the
'vertical amplitude' alignment if necessary.
• Service blanking (SBL) Switch the blanking of the lower
half of the screen ON or OFF (to be used in combination
with the vertical slope alignment).
For EW versions :
• Set Horizontal Parallelogram HP to prevent the picture
from slanting to one side.
• Set Horizontal Bow HB to prevent the top and bottom of
picture from bending to the sides.
• Select Vertical Zoom VX to align the vertical linearity over
the entire screen height (for 16 : 9 applications only).
• Set Trapezium Correction TC to align the lines at the
vertical sides.
• Select East-West Width EW and align the picture width
until the side castellations disappear.
• Select East-West Parabola / width PW and align the
vertical sides until the sides are straightened.
• Select Upper Corner Parabola UCP to straighten the top of
the vertical lines at the sides.
• Select Lower Corner Parabola LCP to straighten the
bottom of the vertical lines at the sides.
• Repeat the last 5 steps if necessary.
Alignments
L04HE AA 8. EN 67