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Electrical Adjustments
n
Gain adjustment [Component]
1. Receive the 16-step gray scale component video sig-
nal [480i] with Video [Y,Cr,Cb] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
4
4. Select item no. "
" and adjust the amplitude "a" to be
minimum by changing the Data value.
5. Connect an oscilloscope to test point "
and chassis ground (-).
5
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 (-).
6
8. Select item no. "
" and adjust the amplitude "a" to be
minimum by changing the Data value.
White Level
(a)
m
Gamma Gain adjustment [PC]
1. Receive the 16-step gray scale computer signal with
Computer [Analog RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
13
4. Select item no. "
" and adjust the amplitude "a" to
4.0
be
±0.1V by changing the Data value.
5. Connect an oscilloscope to test point "
and chassis ground (-).
14
6. Select item no. "
" and adjust the amplitude "a" to
4.0
be
±0.1V by changing the Data value.
7. Connect an oscilloscope to test point "
and chassis ground (-).
15
8. Select item no. "
" and adjust the amplitude "a" to
4.0
be
±0.1V by changing the Data value.
(a)
,
Gamma Gain adjustment [AV]
1. Receive the 16-step gray scale composite video sig-
nal with Video [Video] mode.
2. Enter the service mode.
TP505R
" (+)
3. Connect an oscilloscope to test point "
and chassis ground (-).
4. Select item no. "
4.0
be
TP503G
" (+)
5. Connect an oscilloscope to test point "
and chassis ground (-).
6. Select item no. "
4.0
be
TP501B
" (+)
7. Connect an oscilloscope to test point "
and chassis ground (-).
8. Select item no. "
4.0
be
.
Common Center adjustment
1. Receive the 1 dot black & white pattern computer sig-
nal with Computer [Analog RGB] mode.
2. Enter the service mode.
TP505R
" (+)
3. Project only red light component to the screen.
4. Select item no. "
the minimum flicker on the screen.
6. Project only green light component to the screen.
TP503G
" (+)
7. Select item no. "
the minimum flicker on the screen.
8. Project only blue light component to the screen.
9. Select item no. "
TP501B
" (+)
the minimum flicker on the screen.
-28-
13
" and adjust the amplitude "a" to
±0.1V by changing the Data value.
14
" and adjust the amplitude "a" to
±0.1V by changing the Data value.
15
" and adjust the amplitude "a" to
±0.1V by changing the Data value.
(a)
19
" and change data value to obtain
20
and change data value to obtain
21
" and change data value to obtain
TP505R
" (+)
TP503G
" (+)
TP501B
" (+)
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