DVP-F21 - Sony DVD Service Manual (repair manual). Page 74

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A
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
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)
A = 300 
±
 100 mVp-p (PAL)
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” meets the specification.
Figure 7-3
7-3. ADJUSTMENT RELATED PARTS
ARRANGEMENT
MB-99 BOARD (SIDE A)
7-2. ADJUSTMENT OF VIDEO SYSTEM
1. Video Level Adjustment (MB-99 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
Test point
LINE OUT (VIDEO) connector
(75 
Ω
 terminated)
Instrument
Oscilloscope
Adjusting element
RV501
Specification
1.0
+0.04
 Vp-p
–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 level to 1.0
+0.04
 Vp-p by RV501.
–0.02
Figure 7-1
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 an 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
1.0 
±
 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
1.0      Vp-p
+0.04
–0.02
1.0
±
0.05Vp-p
RV501
V-ADJ
7-2 E
Display
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