Sony DVP-CX777ES Service Manual page 47

6-3. ADJUSTMENT OF VIDEO SYSTEM
1. Video Level Adjustment (MB 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 RV601
Specification 1.0
Adjusting method:
1) In the test mode initial menu "6" Video Level Adjustment, set
so that color bars are generated.
2) Adjust the RV601 to attain 1.0
Fig. 6-1
2. Progressive Video Output Level Adjustment
(MB Board)
<Purpose>
This adjusts progressive video output level. 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 1.0
Adjusting method:
1) In the test mode initial menu "6" Video Level Adjustment, set
so that color bars are generated.
2) Adjust the RV602 to attain 1.0
Fig. 6-2
+0.04
Vp-p
–0.02
+0.04
Vp-p.
–0.02
+0.04
1.0 Vp-p
–0.02
+0.04
Vp-p
–0.02
+0.04
Vp-p.
–0.02
+0.04
1.0 Vp-p
–0.02
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
1.0 ± 0.05 Vp-p
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-Y level is 1.0 ± 0.05 Vp-p.
Fig. 6-3
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 to 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
A = 286 ± 30 mVp-p (NTSC)
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".
Fig. 6-4
DVP-CX777ES
1.0 ± 0.05 Vp-p
A
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