Sony dvp-s3000 Service Manual page 55

5. Checking Composite Video Output Y (MB-80 board)
<Purpose>
This checks composite video output Y. If it is incorrect, correct
brightness will not be attained when connected to, for instance, pro-
jector.
CXD1914 (ENC) check in test mode menu "0"
Mode
Syscon Diagnosis
Signal Color bars
CN005 5 pin (terminating 75 )
Test point
Instrument Oscilloscope
Specification 1 ±0.05 Vp-p
Checking method:
1) Confirm that the Y level is 1 ±0.05 Vp-p.
1 ±0.05 Vp-p
Figure 7-13
6. Checking S Video Output S-C (MB-80 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.
CXD1914 (ENC) check in test mode menu "0"
Mode
Syscon Diagnosis
Signal Color bars
CN005 9 pin
Test point
Instrument Oscilloscope
Specification 286 ±20 mVp-p
Connection:
CN005
100 µ F
+
9
Oscilloscope
75 Ω
100k
± 1%
± 1%
8
Checking method:
1) Confirm that the S-C burst is 286 ±20 mVp-p.
286 ±20 mVp-p
Figure 7-14
7. Checking S Video Output DC Level (MB-80 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.
CXD1914 (ENC) check in test mode menu "0"
Mode
Syscon Diagnosis
Signal Color bars
CN005 9 pin
Test point
Instrument Digital voltmeter
Specification S-terminal 0V: 0V
+0
S-terminal 5V: 5.0 V
–1.5
Connection:
CN005
100 µ F
+
9 Digital voltmeter
75 Ω
100k
± 1% ± 1%
8
Checking method:
1) In the test mode initial menu "0" Syscon Diagnosis, select S-
terminal 0V.
Confirm that the voltage at CN005 9 pin is 0V.
2) Press any key to select S-terminal 5V.
+0
Confirm that the voltage at CN005 9 pin is 5.0
V.
–1.5
7-5
7-5. Adjustment Related Parts Arrangement
MB-80 BOARD (Side A)
11 CN005
9
8
7
6
5
3
2
1
TP022
W001
512 fs
1
CN382
TP020
36 MHz
12
CT001
22 MHz
RV001
IC002
27 MHz FREE-RUN
TP021
PH-COMP
51 30
20
1
80
IC770
SR-740/745 BOARD (Side A)
VR201 1
+5.2V
CN201
12
CN101
RV479
VIDEO
LEVEL
TP018
IC381
27 MHz FREE-RUN
CT022
24 MHz
TP025
XULK
TP019
33 MHz
ICS140
PS-408/413 BOARD (Side A)
T901
F001
7-6 E
CN954
1
3