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Electrical Adjustments
⁄4
Video gain adjustment
1. Receive the 16-step gray scale composite video sig-
nal with Input 3 [video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
4
4. Select group no. "
", item no. "
value to adjust waveform "a" to be minimum ampli-
tude.
5. Connect an oscilloscope to test point "
and chassis ground (-).
4
6. Select item no. "
" and change data value to adjust
waveform "a" to be minimum amplitude.
7. Connect an oscilloscope to test point "
and chassis ground (-).
5
8. Select item no. "
" and change data value to adjust
waveform "a" to be minimum amplitude.
White Level
(a)
⁄5
Video signal offset adjustment
1. Receive the 16-step gray scale composite video sig-
nal with Input 3 [video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
4
4. Select group no. "
", item no. "
1.5
amplitude "a" to be
value.
white level
(a)
TP35G
" (+)
3
" and change data
TP35B
" (+)
TP35R
" (+)
TP35G
" (+)
6
" and adjust the
±0.1V by changing the Data
white level
⁄6
Component Y pedestal adjustment
1. Receive the black 0% component 480i video signal
with Input 3 [Component] mode.
2. Enter the service mode.
5
3. Select group no. "
value to adjust the green noise on the screen to the
deepest green.
⁄7
Component A/D reference voltage
(top side) adjustment
1. Receive the white 100% component 480i video signal
with Input 3 [Component] mode.
2. Enter the service mode.
5
3. Select group no. "
value to adjust the magenta noise on the screen to
the deepest magenta.
⁄8
Component Cb/Cr pedestal adjustment
1. Receive the black 0% component 480i video signal
with Input 3 [Component] mode.
2. Enter the service mode.
5
3. Select group no. "
value to adjust the blue noise on the screen to the
deepest blue.
13
4. Select item no. "
the red noise on the screen to the deepest red.
⁄9
Component gain adjustment
1. Receive the 16-step gray scale component 480i sig-
nal with Input 3 [Component] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
4. Select group no. "
value to adjust waveform "a" to be minimum amplitude.
5. Connect an oscilloscope to test point "
and chassis ground (-).
4
6. Select item no. "
" and change data value to adjust
waveform "a" to be minimum amplitude.
7. Connect an oscilloscope to test point "
and chassis ground (-).
5
8. Select item no. "
" and change data value to adjust
waveform "a" to be minimum amplitude.
(a)
-10-
11
", item no. "
" and change data
18
", item no. "
" and change data
12
", item no. "
" and change data
" and change data value to adjust
TP35G
4
3
", item no. "
" and change data
TP35B
TP35R
White Level
" (+)
" (+)
" (+)
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