Read Sony DVP-S315 Service Manual online
7-3
6. Checking S Video Output S-C (MB-78 board)
<Purpose>
This checks whether the S-C satisfies the NTSC Standard. If it is
not correct, the colors will be too dark or light.
<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
CXD1914 (ENC) check in test mode
menu “0” Syscon Diagnosis
menu “0” Syscon Diagnosis
Signal
Color bars
Test point
CN252 !™ pin
Instrument
Oscilloscope
Specification
286 ± 20 mVp-p
Connection:
Checking method:
1) Confirm that the S-C burst is 286 ±20 mVp-p.
1) Confirm that the S-C burst is 286 ±20 mVp-p.
Figure 7-7
7. Checking S Video Output DC Level (MB-78 board)
<Purpose>
This checks signals for S1 and S2 compatible TV. If they are not
correct, the TV will not switch automatically to letter box, etc.
<Purpose>
This checks signals for S1 and S2 compatible TV. If they are not
correct, the TV will not switch automatically to letter box, etc.
Mode
CXD1914 (ENC) check in test mode
menu “0” Syscon Diagnosis
menu “0” Syscon Diagnosis
Signal
Color bars
Test point
CN252 !™ pin
Instrument
Digital voltmeter
Specification
S-terminal 0V: 0V
S-terminal 5V: 5.0 V
S-terminal 5V: 5.0 V
Connection:
Checking method:
1) In the test mode initial menu “0” Syscon Diagnosis, select S-
1) In the test mode initial menu “0” Syscon Diagnosis, select S-
terminal 0 V.
Confirm that the voltage at CN252 !™ pin is 0 V.
Confirm that the voltage at CN252 !™ pin is 0 V.
2) Press any key to select S-terminal 5V.
Confirm that the voltage at CN252 !™ pin is 5.0 V.
4. Checking Component Video Output R-Y
(MB-78 board)
<Purpose>
This checks component video output R-Y. If it is incorrect, cor-
rect colors will not be displayed when connected to, for instance,
projector.
This checks component video output R-Y. If it is incorrect, cor-
rect colors will not be displayed when connected to, for instance,
projector.
Mode
CXD1914 (ENC) check in test mode
menu “0” Syscon Diagnosis
menu “0” Syscon Diagnosis
Signal
Color bars
Test point
EURO AV 1 (RGB)-TV connector
!∞ pin (terminating 75
!∞ pin (terminating 75
Ω
)
Instrument
Oscilloscope
Specification
700 ± 30 mVp-p
Checking method:
1) Confirm that the R-Y level is 700 ± 30 mVp-p.
1) Confirm that the R-Y level is 700 ± 30 mVp-p.
(NTSC)
(PAL)
Figure 7-5
5. Checking Component Video Output Y
(MB-78 board)
<Purpose>
This checks component video output Y. If it is incorrect, correct
brightness will not be attained when connected to, for instance,
projector.
This checks component video output Y. If it is incorrect, correct
brightness will not be attained when connected to, for instance,
projector.
Mode
CXD1914 (ENC) check in test mode
menu “0” Syscon Diagnosis
menu “0” Syscon Diagnosis
Signal
Color bars
Test point
EURO AV 1 (RGB)-TV connector
!¡ pin (terminating 75
!¡ pin (terminating 75
Ω
)
Instrument
Oscilloscope
Specification
1 ± 0.05 Vp-p
Checking method:
1) Confirm that the Y level is 1 ± 0.05 Vp-p.
1) Confirm that the Y level is 1 ± 0.05 Vp-p.
(NTSC)
(PAL)
Figure 7-6
+0
–1.5
–1.5
+0
–1.5
–1.5
1 ± 0.05 Vp-p
286 ± 20 mVp-p
11
12
100
µ
F
75
Ω
±
1%
100k
±
1%
CN252
+
Digital voltmeter
11
12
100
µ
F
75
Ω
±
1%
100k
±
1%
CN252
+
Oscilloscope
700 ± 30 mVp-p
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