Sony DVP-NS705V, Service Manual, Page: 102 / 125

7-2
3. Checking S Video Output S-Y
<Purpose>
Check S-terminal video output. If it is incorrect, pictures will not
be displayed correctly in spite of connection to the TV with a S-
terminal cable.
Mode Video level adjustment in test mode
Signal Color bars
Test point
S VIDEO OUT (S-Y) connector
(75
Ω terminated)
Instrument Oscilloscope
Specification 1.00 ± 0.05 Vp-p
Checking method:
1) In the test mode initial menu “6” Video Level Adjustment, set
so that color bars are generated.
2) Confirm that the S-Y level is 1.00 ± 0.05 Vp-p.
Figure 7-3
4. Checking S Video Output S-C
<Purpose>
This checks whether the S-C satisfies the NTSC Standard. If it is
not correct, the colors will be too dark or light.
Mode Video level adjustment in test mode
Signal Color bars
Test point
S VIDEO OUT (S-C) connector
(75
Ω
terminated)
Instrument Oscilloscope
Specification A = 286 ± 30 mVp-p (NTSC)
Checking method:
1) In the test mode initial menu “6” Video Level Adjustment, set
so that color bars are generated.
2) Confirm that the S-C burst is “A”.
Figure 7-4
7-2. ADJUSTMENT OF VIDEO SYSTEM
1. Video Level Adjustment (MB-105 BOARD)
<Purpose>
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
Mode Video level adjustment in test mode
Signal Color bars
Test point
LINE OUT (VIDEO) connector
(75
Ω terminated)
Instrument Oscilloscope
Adjusting element RV401 (NS705V)
RV601 (Except NS705V)
Specification 1.00 Vp-p
Adjusting method:
1) In the test mode initial menu “6” Video Level Adjustment, set
so that color bars are generated.
2) Adjust the RV601 (or RV401) to attain 1.00 Vp-p.
Figure 7-1
2. Progressive Video Output Level Adjustment
(MB-105 BOARD) (Except NS705V)
<Purpose>
This adjustments progressive video output. If it is incorrect, cor-
rect brightness will not be attained when connected to, for instance,
projector.
Mode Video level adjustment in test mode
Signal Color bars
Test point
COMPONENT VIDEO OUT (Y)
connector (75
Ω terminated)
Instrument Oscilloscope
Adjusting element RV602
Specification 1.00 Vp-p
Adjusting method:
1) In the test mode initial menu “7” Prog Level Adjustment, set
so that color bars are generated.
2) Adjust the RV602 to attain 1.00 Vp-p
Figure 7-2
+0.04
–0.02
A
+ 0.04
– 0.02
1.00 Vp-p
+0.04
–0.02
1.00 ± 0.05 Vp-p
+ 0.04
– 0.02
+ 0.04
– 0.02
1.00 Vp-p
+ 0.04
– 0.02