Toshiba 28YT56, Service Manual

Page: 48 / 88

47
UC PARAB
Change Upper Correction by pressing “
◄
/
►
” buttons till vertical lines at the upper corners of
the picture frame become vertical and parallel to vertical corner sides of picture tube. Check
and readjust U.COR item if the adjustment becomes improper after some other geometric
adjustments are done.
S-No OSD Description MinMax Def.
Upper Corner Parabola for 16:9 0..63 1 021 UC PARAB
Upper Corner Parabola for 4:3 0..63 13
LC PARAB
Change Lower Correction by pressing “
◄
/
►
” buttons till vertical lines at the lower corners of the
picture frame become vertical and parallel to vertical corner sides of picture tube. Check and readjust
L.COR item if the adjustment becomes improper after some other geometric adjustments are done.
S-No OSD Description MinMax Def.
Lower Corner Parabola for 16:9 0..63 5 022 LC PARAB
Lower Corner Parabola for 4:3 0..63 16
HOR BOW
Change Horizantal Bow by pressing “
◄
/
►
” buttons till the vertical lines especially ones close to the
left and right sides will of equal and symmetrical bending, i.e. they together will neither be towards
left side nor right side. Check and readjust BOW item if the adjustment becomes improper after some
other geometric adjustments are done
.
S-No OSD Description MinMax Def.
Horizontal Bow for 16:9 0..63 28 023 HOR BOW
Horizontal Bow for 4:3 0..63 42
PARALLEL
S-No OSD Description MinMax Def.
East West Parabola Width 16:9 0..63 34 024 PARALLEL
East West Parabola Width 4:3 0..63 33