Sony DVP-CX850D (serv.man2) Service Manual ▷ View online
8-1
DVP-CX850D
SECTION 8
ELECTRICAL ADJUSTMENT
In making adjustment, refer to 8-3. Adjustment
Related Parts Arrangement.
Related Parts Arrangement.
This section describes procedures and instructions necessary for
adjusting electrical circuits in this set.
adjusting electrical circuits in this set.
Instruments required:
1) Color monitor TV
2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz,
2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz,
with delay mode
3) Frequency counter (over 8 digits)
4) Digital voltmeter
5) Standard commander (RMT-D113A)
6) DVD reference disc
4) Digital voltmeter
5) Standard commander (RMT-D113A)
6) DVD reference disc
HLX-501 (J-6090-071-A) (dual layer) (NTSC)
HLX-503 (J-6090-069-A) (single layer) (NTSC)
HLX-504 (J-6090-088-A) (single layer) (NTSC)
HLX-505 (J-6090-089-A) (dual layer) (NTSC)
HLX-503 (J-6090-069-A) (single layer) (NTSC)
HLX-504 (J-6090-088-A) (single layer) (NTSC)
HLX-505 (J-6090-089-A) (dual layer) (NTSC)
7) SACD reference disc
HLXA-509 (J-6090-090-A)
8-1. POWER SUPPLY ADJUSTMENT
1. HS-030SH Board
Mode
E-E
Instrument
Digital voltmeter
+5 V Check
Test point
CN202 pin 5
Specification
5.0 ± 0.2 Vdc
+3.3 V Check
Test point
CN202 pin 7
Specification
3.3 ± 0.2 Vdc
EVER+5 V Check
Test point
CN203 pin 2
Specification
5.0 ± 0.2 Vdc
P_CONT Check
Test point
CN203 pin 1
Specification
4V – 5 Vdc
A +12 V Check
Test point
CN202 pin 1
Specification
9.5+ Vdc
–12 V Check
Test point
CN203 pin 5
Specification
–12.0 ± 1.0 Vdc
M +12 V Check
Test point
CN202 pin 2
Specification
12.0 ± 1.0 Vdc
Checking method:
1) Confirm that each voltage satisfies the specification.
–0.5
+1.5
+1.5
8-2
3. Checking Component Video Output B-Y
(MB-85 BOARD)
(MB-85 BOARD)
<Purpose>
This checks component video output B-Y. If it is incorrect, cor-rect
colors will not be displayed when connected to, for instance,
projector.
This checks component video output B-Y. If it is incorrect, cor-rect
colors will not be displayed when connected to, for instance,
projector.
Mode
Test Disc PLAY
Signal
Color bars
Test point
COMPONENT VIDEO OUT (B-Y)
connector (75
connector (75
Ω
terminated)
Instrument
Oscilloscope
Specification
700 ± 50 mVp-p
Checking method:
1)
1)
Insert the test disc HLX506 (PAL) and play back the title 1.
2)
Confirm that the B-Y level is 700 ± 50 mVp-p.
Fig. 8-3
4. Checking Component Video Output R-Y
(MB-85 BOARD)
(MB-85 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
Test Disc PLAY
Signal
Color bars
Test point
COMPONENT VIDEO OUT (R-Y)
connector (75
connector (75
Ω
terminated)
Instrument
Oscilloscope
Specification
700 ± 50 mVp-p
Checking method:
1)
1)
Insert the test disc HLX506 (PAL) and play back the title 1.
2)
Confirm that the R-Y level is 700 ± 50 mVp-p.
Fig. 8-4
8-2. ADJUSTMENT OF VIDEO SYSTEM
Note:
The color bar signal of the test mode is an NTSC signal.
The color bar signal of the test mode is an NTSC signal.
1. Video Level Adjustment (MB-85 BOARD)
<Purpose>
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
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
(75
Ω
terminated)
Instrument
Oscilloscope
Adjusting element
RV401
Specification
1.0 Vp-p
Adjusting method:
1) In the test mode initial menu “6” Video Level Adjustment, set
1) In the test mode initial menu “6” Video Level Adjustment, set
so that color bars are generated.
2) Adjust the RV401 to attain 1.0 Vp-p.
Fig. 8-1
2. S-terminal Output Check (MB-85 BOARD)
<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.
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
Test Disc PLAY
Signal
Color bars
Test point
S VIDEO OUT (S-Y) connector
(75
(75
Ω
terminated)
Instrument
Oscilloscope
Specification
1.0 ± 0.05 Vp-p
Checking method:
1)
1)
Insert the test disc HLX506 (PAL) and play back the title 1.
2)
Confirm that the S-Y level is 1.0 ± 0.05 Vp-p.
Fig. 8-2
1.0
±
Vp-p
+0.04
–0.02
–0.02
1.0
±
0.05 Vp-p
700
±
50 mVp-p
700
±
50 mVp-p
+0.04
–0.02
–0.02
+0.04
–0.02
–0.02
8-3
6. Checking S Video Output S-C (MB-85 BOARD)
<Purpose>
This checks whether the S-C satisfies the PAL Standard. If it is not
correct, the colors will be too dark or light.
This checks whether the S-C satisfies the PAL Standard. If it is not
correct, the colors will be too dark or light.
Mode
Test Disc PLAY
Signal
Color bars
Test point
S VIDEO OUT (S-C) connector
(75
(75
Ω
terminated)
Instrument
Oscilloscope
Specification
300 ± 100 mVp-p (NTSC)
Checking method:
1)
1)
Insert the test disc HLX506 (PAL) and play back the title 1.
2)
Confirm that the S-C burst is 300 ± 100 mVp-p.
Fig. 8-6
5. Checking Component Video Output Y
(MB-85 BOARD)
(MB-85 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
Test Disc PLAY
Signal
Color bars
Test point
COMPONENT VIDEO OUT (Y)
connector (75
connector (75
Ω
terminated)
Instrument
Oscilloscope
Specification
1.0 ± 0.05 Vp-p
Checking method:
1)
1)
Insert the test disc HLX506 (PAL) and play back the title 1.
2)
Confirm that the Y level is 1.0 ± 0.05 Vp-p.
Fig. 8-5
1.0
±
0.05 Vp-p
7. Checking EURO AV1 RGB Output
Mode
DVD Test Disc PLAY
Signal
Color bars
EURO AV1 (RGB)-TV connector
Test point
R : qg pin (75
Ω
terminated)
G : qa pin (75
Ω
terminated)
B : 7 pin (75
Ω
terminated)
Instrument
Oscilloscope
Specification
700 ± 50 mVp-p (NTSC)
Checking method:
1)
1)
Press SET UP of the remote control to let the setup shown on
the display.
the display.
2)
Use the cursor key to let the CUSTOM SETUP shown on the
display.
display.
3)
Select the item “EURO AV OUT:” and set the “RGB”.
4)
Press SET UP again to end the setup.
5)
Insert the test disc HLX506 (PAL) and play back the title 1.
6)
Confirm that each of R, G and B levels is 700 ± 50 mVp-p.
Fig. 8-7
300
±
100 mVp-p
700
±
70 mVp-p
700
±
70 mVp-p
700
±
70 mVp-p
qg
qa
7
R
G
B
8-4
9. Checking EURO AV1,2 VIDEO Output
Mode
DVD Test Disc PLAY
Signal
Color bars
EURO AV1 (RGB)-TV connector
ql
ql
pin (75
Ω
terminated)
EURO AV2 connector
ql
ql
pin (75
Ω
terminated)
Instrument
Oscilloscope
Specification
1.00 ± 0.05Vp-p
Fig. 8-9
Checking method:
1)
1)
Press SET UP of the remote control to let the setup shown on
the display.
the display.
2)
Use the cursor key to let the CUSTOM SETUP shown on the
display.
display.
3)
Select the item “EURO AV OUT:” and set the “VIDEO”.
4)
Press SET UP again to end the setup.
5)
Insert the test disc HLX506 (PAL) and play back the title 1.
6)
Confirm that the video signal level is 1.00 ± 0.05 Vp-p.
Test point
1.0
±
0.02 Vp-p
qg
VIDEO
1.0
±
0.1 Vp-p
Y
ql
8. Checking EURO AV1 YC Output
Mode
DVD Test Disc PLAY
Signal
Color bars
EURO AV1 (RGB)-TV connector
Test point
Y : ql pin (75
Ω
terminated)
C : qg pin (75
Ω
terminated)
Instrument
Oscilloscope
Specification
700 ± 50 mVp-p (NTSC)
C (Burse) = 300 ± 100 mVp-p
C (Burse) = 300 ± 100 mVp-p
Checking method:
1)
1)
Press SET UP of the remote control to let the setup shown on
the display.
the display.
2)
Use the cursor key to let the CUSTOM SETUP shown on the
display.
display.
3)
Select the item “EURO AV OUT:” and set the “S-VIDEO”.
4)
Press SET UP again and end the setup.
5)
Insert the test disc HLX506 (PAL) and play back the title 1.
6)
Confirm that Y level is 1.00 ± 0.05 Vp-p and burst level is 300
± 100 mVp-p.
± 100 mVp-p.
Fig. 8-8
300
±
100 mVp-p
qg
C
C = (Burst)
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