JVC AV28BT7ENS Service Manual page 15

Measuring
Item
instrument
S-CORRECTION Signal
Adjustment generator
VERTICAL Signal
SHIFT
generator
Adjustment
EW WIDTH Signal
Adjustment generator
EW Signal
PARABOLA
generator
WIDTH
Adjustment
EW CORNER Signal
PARABOLA
generator
Adjustment
Test point Adjustment part
Adjust 15 ( 4 : 3 )
Adjust 26 ( 16 : 9 )
Adjust 16 ( 4 : 3 )
Adjust 27 ( 16 : 9 )
Adjust 17 ( 4 : 3 )
Adjust 28 ( 16 : 9 )
Adjust 18 ( 4 : 3 )
Adjust 29 ( 16 : 9 )
Adjust 19 ( 4 : 3 )
Adjust 30 ( 16 : 9 )
No. 51883
Description
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.
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.
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.
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.
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.
AV28BT7ENS / AV28BT7ENB
AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB
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