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Electrical Adjustments
⁄1
Pedestal adjustment [HDTV-480p]
1. Receive the 100%whole-Black component video sig-
nal with Video [Y/Pb,Pr] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
(+) and chassis ground (-).
0
4. Select group no. "
", item no. "
level to be maximum amplitude by changing the Data
value.
5. Connect an oscilloscope to test point "
(+) and chassis ground (-).
8
6. Select item no. "
" and adjust the black level to be
maximum by changing the Data value.
7. Connect an oscilloscope to test point "
(+) and chassis ground (-).
9
8. Select item no. "
" and adjust the black level to be
maximum by changing the Data value.
Black Level
Pedestal Level
⁄2
Gain adjustment [HDTV-480p]
1. Receive the 16-step grey scale component video sig-
nal with Component [Y,Pr,Pb] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
(+) and chassis ground (-).
9
4. Select group no. "
", item no. "
tude "a" to be minimum by changing the Data value.
5. Connect an oscilloscope to test point "
(+) and chassis ground (-).
4
6. Select item no. "
" and adjust the amplitude "a" to be
minimum by changing the Data value.
7. Connect an oscilloscope to test point "
(+) and chassis ground (-).
5
8. Select item no. "
" and adjust the amplitude "a" to be
minimum by changing the Data value.
White Level
(a)
TPVIDEOG
"
7
" and adjust the black
TPVIDEOB
"
TPVIDEOR
"
TPVIDEOG
"
3
" and adjust the ampli-
TPVIDEOB
"
TPVIDEOR
"
-29-
⁄3
Common Center adjustment
1. Receive the 1 line black/white pattern computer sig-
nal with Computer2 [RGB] mode.
2. Enter the service mode.
3. Project only red light component to the screen.
10
4. Select group no. "
", item no. "
value to obtain the minimum flicker on the screen.
5. Project only green light component to the screen.
1
6. Select item no. "
" and change data value to obtain
the minimum flicker on the screen.
7. Project only blue light component to the screen.
2
8. Select item no. "
and change data value to obtain
the minimum flicker on the screen.
⁄4
Gamma adjustment
1. Receive the 100%whole-white computer signal with
Computer 2 [RGB] mode.
2. Enter the service mode.
3. Measure luminance on the screen with the luminance
A
meter. It is
for the reading of luminance meter.
4. Change the signal source to the 50%whole-white
computer signal.
9
5. Select group no. "
", Item no. "
value to make the reading of luminance meter to be
x 0.22
.
6. Receive the 100%whole-white composite video signal
with Video [Video] mode.
7. Measure luminance on the screen with the luminance
A
meter. It is
for the reading of luminance meter.
8. Change the signal source to the 50%whole-white
composite video signal.
9
9. Select group no. "
", Item no. "
value to make the reading of luminance meter to be
x 0.22
.
0
" and change data
6
" and change the Data
A
6
" and change the Data
A
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