Sanyo PLV-70 Service Manual page 26

Electrical Adjustments
Video Gain adjustment
1. Receive the 16-step gray scale video signal with Input
3 [VIDEO] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
10
4. Select group no. " ", item no. "
to "600", and then decrease data to adjust waveform
"a" to be minimum amplitude.
5. Connect an oscilloscope to test point "
and chassis ground (-).
4
6. Select item no. " " and set data value to "600", and
then decrease data to adjust waveform "a" to be mini-
mum amplitude.
7. Connect an oscilloscope to test point "
and chassis ground (-).
5
8. Select item no. " " and set data value to "580", and
then decrease data to adjust waveform "a" to be mini-
mum amplitude.
White Level
HDTV Pedestal adjustment
[480p-PEDESTAL ADJUSTMENT]
1. Receive the 16-step gray scale component signal
[480p] with Input 3 [COMPONENT] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
11
4. Select group no. " ", item no. "
value to adjust the pedestal level and black level to be
the same level.
5. Connect an oscilloscope to test point "
chassis ground (-).
16
6. Select item no. " " and change data value to adjust
the pedestal level and black level to be the same
level.
7. Connect an oscilloscope to test point "
chassis ground (-).
17
8. Select item no. " " and change data value to adjust
the pedestal level and black level to be the same
level.
Pedestal Lebel = Black Lebel
TP531
" (+)
3
" and set data value
TP501
" (+)
TP561
" (+)
(a)
TP531
" (+) and
15
" and change data
TP501
" (+) and
TP561
" (+) and
-26-
[1080i-PEDESTAL ADJUSTMENT]
1. Receive the 16-step gray scale component signal
[1080i] with Input 3 [COMPONENT] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
11
4. Select group no. " ", item no. "
value to adjust the pedestal level and black level to be
the same level.
5. Connect an oscilloscope to test point "
chassis ground (-).
16
6. Select item no. " " and change data value to adjust
the pedestal level and black level to be the same
level.
7. Connect an oscilloscope to test point "
chassis ground (-).
17
8. Select item no. " " and change data value to adjust
the pedestal level and black level to be the same
level.
HDTV Gain adjustment
1. Receive the 16-step gray scale component signal
[1080i] with Input 3 [COMPONENT] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
10
4. Select group no. " ", item no. "
to "600", and then decrease data to adjust waveform
"a" to be minimum amplitude.
5. Connect an oscilloscope to test point "
and chassis ground (-).
4
6. Select item no. " " and set data value to "600", and
then decrease data to adjust waveform "a" to be mini-
mum amplitude.
7. Connect an oscilloscope to test point "
and chassis ground (-).
5
8. Select item no. " " and set data value to "600", and
then decrease data to adjust waveform "a" to be mini-
mum amplitude.
White Level
TP531
" (+) and
15
" and change data
TP501
" (+) and
TP561
" (+) and
TP531
" (+)
3
" and set data value
TP501
" (+)
TP561
" (+)
(a)