Toshiba 28YT56, Service Manual

Page: 47 / 88

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EW WIDTH
Change EW width by pressing “
◄
/
►
” buttons till no under-scan condition will happen, i.e. no white
bars on the left and right side of the test pattern will be visible nor picture will be so wide. Check and
readjust H-SIZE item if the adjustment becomes improper after some other geometric adjustments
are done.
S-No OSD Description MinMax Def.
East West width for 16:9 0..63 48 017 EW WIDTH
East West width for 4:3 0..63 18
HOR SHIFT
Change Horizontal Shift by pressing “
◄
/
►
” buttons till the the test pattern is horizontally in equal
distance both to right and left sides of the picture tube. Check and readjust H-SHIFT item if the
adjustment becomes improper after some other geometric adjustments are done.
S-No OSD Description MinMax Def.
018 HOR SHIFT Horizontal shift 0..63 31
EW PARAB
Change EW Parabol by pressing “
◄
/
►
” buttons till vertical lines close to the both sides of the picture
frame become parallel to vertical sides of picture tube without any bending to left or to right side of
the screen. Check and readjust PARAB item if the adjustment becomes improper after some other
geometric adjustments are done.
S-No OSD Description MinMax Def.
East West Parabola width 16:9 0..63 25 019 EW PARAB
East West Parabola width 4:3 0..63 35
TRAPEZ
Change Trapezium by pressing “
◄
/
►
” buttons till vertical lines, especially lines at the sides of the
picture frame became parallel to the both sides of picture tube as close as possible. Check and
readjust TRPEZ item if the adjustment becomes improper after some other geometric adjustments are
done.
S-No OSD Description MinMax Def.
East West Trapezium for 16:9 0..63 26 020 TRAPEZ
East West Trapezium for 4:3 0..63 30