Adjustment Of Video System; Video Level Adjustment; Checking S Video Output S-Y; Checking S Video Output S-C - Sony DVP-NS300 Service Manual

QQ
3 7 63 1515 0

7-2. ADJUSTMENT OF VIDEO SYSTEM

1. Video Level Adjustment (MB-98 BOARD)
<Purpose>
This adjustment is made to satisfy the NTSC/PAL standard, and if
not adjusted correctly, the brightness will be too large or small.
Mode Video level adjustment in test mode
Signal Color bars
LINE OUT (VIDEO) connector
Test point
(75 Ω terminated)
Instrument Oscilloscope
Adjusting element RV501
+0.04
Specification 1.0
–0.02
Adjusting method:
1) In the test mode initial menu "6" Video Level Adjustment, set
so that color bars are generated.
2) Adjust the RV501 to attain 1.0
Figure 7-1
TE
L 13942296513

2. 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
S VIDEO OUT (S-Y) connector
Test point
(75 Ω terminated)
Instrument Oscilloscope
Specification 1.0 ± 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 1.0 ± 0.05 Vp-p.
Figure 7-2
www
.
http://www.xiaoyu163.com
Vp-p
+0.04
Vp-p.
–0.02
+0.04
1.0 Vp-p
–0.02
1.0 ± 0.05 Vp-p
x ao u163
y
i
http://www.xiaoyu163.com
2 9
8

3. Checking S Video Output S-C

<Purpose>
This checks whether the S-C satisfies the NTSC/PAL Standard. If
it is not correct, the colors will be too dark or light.
Mode
Signal
Test point
Instrument
Specification
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".

4. Checking Component Video Output Y

(Except AEP, UK, RUS Model)
<Purpose>
Q Q
This checks component video output Y. If it is incorrect, correct
3 6 7 1 3 1 5
brightness will not be attained when connected to, for instance,
projector.
Mode
Signal
Test point
Instrument
Specification
Checking method:
1) In the test mode initial menu "6" Video Level Adjustment, set
so that color bars are generated.
2) Confirm that the Y level is 1.0 ± 0.05 Vp-p.
co
.
7-2
9 4 2 8
Video level adjustment in test mode
Color bars
S VIDEO OUT (S-C) connector
(75 Ω terminated)
Oscilloscope
A = 286 ± 30 mVp-p (NTSC)
A = 300 ± 100 mVp-p (PAL)
A
Figure 7-3
0 5 8 2 9 9 4
Video level adjustment in test mode
Color bars
COMPONENT VIDEO OUT (Y)
connector (75 Ω terminated)
Oscilloscope
1.0 ± 0.05 Vp-p
1.0 ± 0.05 Vp-p
Figure 7-4
m
9 9
2 8 9 9