No. 51878
AV21BT7ENS / AV21BT7ENB
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
14
Item
Measuring
instruments
Test point
Adjustment part
Description
4 : 3
HORIZONTAL
SHIFT
Adjustment
Signal
generator
Adjust 12 ( 4 : 3 )
Adjust 23 ( 16 : 9 )
1. Receive
a
RED
test pattern.
2. Set
< 4 : 3 aspect mode >
.
3. Select
< ADJUST 12 >
from SERVICE MENU.
4. Change horizontal shift till the picture is horizontally
centered. Check whether this adjustment is correct after
completing Service Mode Adjustment.
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
SLOPE
Adjustment
Signal
generator
Adjust 13 ( 4 : 3 )
Adjust 24 ( 16 : 9 )
1. Receive a cross-hatch signal.
2. Set
< 4 : 3 aspect mode >
.
3. Select
< ADJUST 13 >
from SERVICE MENU.
4. Change vertical slope till the size of squares on both the
upper and lower part of test pattern become equal to the
squares laying on the vertical centre of the test pattern.
Check and readjust VERTICAL SLOPE item if the
adjustment becomes improper after some other geometric
adjustments are done.
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
AMPLITUDE
Adjustment
Signal
generator
Adjust 14 ( 4 : 3 )
Adjust 25 ( 16 : 9 )
1. Receive
a
PAL
test pattern signal.
2. Set
< 4 : 3 aspect mode >
.
3. Select
< ADJUST 14 >
from SERVICE MENU.
4. Change vertical slope till horizontal black lines on both the
upper and lower part of the test pattern become very close
to the upper and lower horizontal sides of picture tube and
nearly about to disappear. Check and readjust VERTICAL
AMPLITUDE item if the adjustment becomes improper after
some other geometric adjustments are done.
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.
