No. 51881
AV28BT5ENS / AV28BT5ENB
AV28BT5EES / AV28BT5EEB
15
Item
Measuring
instrument
Test point
Adjustment part
Description
S-CORRECTION
Adjustment
Signal
generator
Adjust 15 ( 4 : 3 )
Adjust 26 ( 16 : 9 )
1. Receive
a
PAL
circle pattern signal.
2. Set
< 4 : 3 aspect mode >
.
3. Select
< ADJUST 15 >
from SERVICE MENU.
4. Change S-correction till the middle part of the circle is round
as possible.
5. Set
< 16 : 9 aspect mode >
.
6. Adjusts with the step which is the same above from 3 to 4
about the 16 : 9 aspect mode, too.
VERTICAL
SHIFT
Adjustment
Signal
generator
Adjust 16 ( 4 : 3 )
Adjust 27 ( 16 : 9 )
1. Receive
a
PAL
test pattern signal ( or the symmetrical signal
in the top and the bottom and on either side to find ).
2. Set
< 4 : 3 aspect mode >
.
3. Select
< ADJUST 16 >
from SERVICE MENU.
4. Change Vertical Shift till the test pattern is vertically centred,
i.e. horizontal line at the centre pattern is in equal distance
both to upper and lower side of the picture tube.
5. Check and readjust Vertical Shift item if the adjustment
becomes improper after some other geometric adjustments
are done.
6. Set
< 16 : 9 aspect mode >
.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
EW WIDTH
Adjustment
Signal
generator
Adjust 17 ( 4 : 3 )
Adjust 28 ( 16 : 9 )
1. Receive
a
PAL
test pattern signal.
2. Set
< 4 : 3 aspect mode >
.
3. Select
< ADJUST 17 >
from SERVICE MENU.
4. Change EW Width till the vertical black and white bars on
both left and right side of the pattern exactly disappear.
5. Set
< 16 : 9 aspect mode >
.
6. Adjusts with the step which is the same above from 3 to 4
about the 16 : 9 aspect mode, too.
EW
PARABOLA
WIDTH
Adjustment
Signal
generator
Adjust 18 ( 4 : 3 )
Adjust 29 ( 16 : 9 )
1. Receive
a
PAL
test pattern signal.
2. Set
< 4 : 3 aspect mode >
.
3. Select
< ADJUST 18 >
from SERVICE MENU.
4. Change EW Parabola Width till vertical lines close to the both
sides of the picture frame become parallel to vertical side of
picture tube.
5. Check and readjust EW Parabola Width item if the
adjustment becomes improper after some other geometric
adjustments are done.
6. Set
< 16 : 9 aspect mode >
.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
EW CORNER
PARABOLA
Adjustment
Signal
generator
Adjust 19 ( 4 : 3 )
Adjust 30 ( 16 : 9 )
1. Receive
a
PAL
test pattern signal.
2. Set
< 4 : 3 aspect mode >
.
3. Select
< ADJUST 19 >
from SERVICE MENU.
4. Change EW Corner Parabola till vertical lines at the corners
of both sides of picture frame become vertical and parallel to
vertical corner sides of picture tube.
5. Check and readjust EW Corner Parabola item if the
adjustment becomes improper after some other geometric
adjustments are done.
6. Set
< 16 : 9 aspect mode >
.
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
