Adjustment Of Video System; Checking Video Output Level; Checking Progressive Video Output Level; Checking S Video Output S-Y - Sony DVP-NS777P Service Manual

7-2. ADJUSTMENT OF VIDEO SYSTEM

1. Checking Video Output Level

<Purpose>
This checks whether Video Output level satisfy the NTSC/PAL
standard. If it is not correct, the brightness will be too large or
small.
Mode Play
Check the Color-bar (100%) signal
Signal
on DVD reference disc
LINE OUT (VIDEO) connector
Measurement Point
(75 Ω terminated)
Measuring Instrument Oscilloscope
Specification 1.00
Checking method:
1) Confirm that the Video Output level is 1.00
Figure 7-1

2. Checking Progressive Video Output Level

<Purpose>
This checks whether progressive video output. If it is incorrect,
correct brightness will not be attained when connected to, for in-
stance, projector.
Mode Play
Check the Color-bar (100%) signal
Signal
on DVD reference disc
COMPONENT VIDEO OUT (Y)
Measurement Point
connector (75 Ω terminated)
Measuring Instrument Oscilloscope
Specification 1.00
Checking method:
1) Confirm that the Progressive video output 1.00
Figure 7-2
+0.04
Vp-p
–0.02
+ 0.04
Vp-p.
– 0.02
+0.04
1.00 Vp-p
–0.02
+ 0.04
Vp-p
– 0.02
+ 0.04
Vp-p
– 0.02
+ 0.04
1.00
– 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
Signal
Measurement Point
Measuring Instrument
Specification
Checking method:
1) Confirm that the S-Y level is 1.00 ± 0.05 Vp-p.

4. Checking S Video Output S-C

<Purpose>
This checks whether the S video output S-C satisfies the NTSC/
PAL Standard. If it is not correct, the colors will be too dark or
light.
Mode
Signal
Measurement Point
Measuring Instrument
Specification
Checking method:
1) Confirm that the S-C burst is "A".
Vp-p
7-2
Play
Check the Color-bar (100%) signal
on DVD reference disc
S VIDEO OUT (S-Y) connector
(75 Ω terminated)
Oscilloscope
1.00 ± 0.05 Vp-p
1.00 ± 0.05 Vp-p
Figure 7-3
Play
Check the Color-bar (100%) signal
on DVD reference disc
S VIDEO OUT (S-C) connector
(75 Ω terminated)
Oscilloscope
A = 286 ± 30 mVp-p (NTSC)
A = 300 ± 100 mVp-p (PAL)
A
Figure 7-4