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Model
DVP-NS72HP DVP-NS77H DVP-NS77HP DVP-NS78H DVP-NS78HP
Pages
90
Size
6.78 MB
Type
PDF
Document
Service Manual
Brand
Device
DVD
File
dvp-ns72hp-dvp-ns77h-dvp-ns77hp-dvp-ns78h-dvp-ns78.pdf
Date
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Sony DVP-NS72HP / DVP-NS77H / DVP-NS77HP / DVP-NS78H / DVP-NS78HP Service Manual ▷ View online

6-8E
DVP-NS72HP/NS77H/NS77HP/NS78H/NS78HP
8G
7G
6G
5G
4G
3G
2G
1G
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col
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col
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Dp
Dp
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m
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ANODE CONNECTION
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
P17
8G
7G
6G
5G
4G
3G
2G
1G
Dp
(5G, 3G)
(7G~2G)
col
(7G~1G)
a
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7-1
DVP-NS72HP/NS77H/NS77HP/NS78H/NS78HP
This section describes procedures and instructions necessary for
adjusting electrical circuits in this unit.
Instruments required:
(1) Color monitor TV
(2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz, with
delay mode
(3) Frequency counter (over 8 digits)
(4) Digital multimeter
(5) Standard commander (RMT-D175A/D175P)
(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)
7-1. POWER SUPPLY OUTPUT VOLTAGE
CHECK
Mode
Except standby
Instrument
Digital multimeter
EVER +5 V Check
Test point
CN201 pin 4
Specification
5.0 ± 0.3 Vdc
SW +3.3 V Check
Test point
CN201 pin 5
Specification
3.35 ± 0.2 Vdc
SW+5 V Check
Test point
CN201 pin 6
Specification
5.0        Vdc
SW +8 V Check
Test point
CN201 pin 1
Specification
8.0 ± 0.5 Vdc
EVER +11 V Check
Test point
CN201 pin 3
Specification
11.0        Vdc
EVER –10 V Check
Test point
CN201 pin q;
Specification
–10.0        Vdc
Checking method:
(1) Confirm that each voltage satisfies the specification.
Caution!
Please do not touch any electrical parts at primary circuit to avoid
electrical shock.
+0.5
–1.0
+1.5
–0.5
+0.2
–0.3
SECTION 7
ELECTRICAL ADJUSTMENT
7-2
DVP-NS72HP/NS77H/NS77HP/NS78H/NS78HP
7-2. ADJUSTMENT OF VIDEO SYSTEM
  
 
  
  
  
1.
Checking Video Level
<Purpose>
Checking Video Level the NTSC/PAL standard, and if not correct, the
brightness will be too large or small.
Mode
HLX-504 play back
Signal
Color bars 100%
Test point
LINE OUT (VIDEO) connector
(75 
Ω terminated)
Instrument
Oscilloscope
Specification
1.0 ± 0.08 Vp-p
Adjusting method:
(1) In the Video Signal menu “1” Color Bar 100% play back.
(2) Confirm that the Video Level is 1.0 ± 0.08 Vp-p.
Fig. 7-1.
2.
Checking Scart Video Output Level (Video Mode)
(
AEP,UK,RUS)
<Purpose>
Check scart video output level. If it is incorrect, correct brightness
will be too large or small.
Mode
HLX-504 play back
Signal
Color bars 100%
Test point
VIDEO OUT (19p)
connector (75 W terminated)
Instrument
Oscilloscope
Specification
1.0 ± 0.08 Vp-p
Adjusting method:
(1) In the Video Signal menu “1” Color Bar 100% play back.
(2) Confirm that the video level is 1.0 ± 0.08 Vp-p.
Fig. 7-2.
1.0 ± 0.08 Vp-p 
3.
Checking Scart S Video Output S-Y
(S-Video Mode) (
 AEP,UK,RUS)
Checking S Video Output S-Y
(
Except AEP,UK,RUS)
<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
HLX-504 play back
Signal Color bars 100%
Test point
S VIDEO OUT (S-Y) (19p)
(75 
Ω terminated)
Instrument
Oscilloscope
Specification
1.0 ± 0.08 Vp-p
Checking method:
1)
In the Video Signal menu “1” Color Bar 100% play back.
2)
Confirm that the S-Y level is 1.0 ± 0.08 Vp-p.
Fig. 7-3.
4.
Checking Scart S Video Output S-C
(S-Video Mode) (
AEP,UK,RUS)
Checking S Video Output S-C
(
Except AEP,UK,RUS)
<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
HLX-504 play back
Signal
Color bars 100%
Test point
S VIDEO OUT (S-C)  (15p)
(75 
Ω terminated)
Instrument
Oscilloscope
Specification
A = 286 ± 50 mVp-p (NTSC)
A = 300 ± 50 mVp-p (PAL)
Checking method:
(1) In the Video Signal menu “1” Color Bar 100% play back.
(2) Confirm that the S-C burst is “A”.
Fig. 7-4.
A
1.0 ± 0.08 Vp-p 
1.0 ±0.08 Vp-p 
7-3
DVP-NS72HP/NS77H/NS77HP/NS78H/NS78HP
5.
Checking RGB Output G (RGB Mode)
 (
AEP,UK,RUS)
<Purpose>
This checks RGB video output G level. If it is incorrect, correct color
will not be remain some.
Mode
HLX-504 play back
Signal
Color bars
Test point
Green Out (11p) (75 
Ω terminated)
Instrument
Oscilloscope
Specification
A = 700 ± 70mVp-p
Checking method:
(1) In the Video Signal menu “1” Color Bar 100% play back.
(2) Confirm that the G level is A.
Fig. 7-5.
6.
Checking RGB Output B (RGB Mode)
 (
AEP,UK,RUS)
<Purpose>
This checks RGB video output B level. If it is incorrect, correct colors
will not be displayed when connected to, for instance, projector.
Mode
HLX-504 play back
Signal
Color bars
Test point
Blue Out, (7p) (75 
Ω terminated)
Instrument
Oscilloscope
Specification
A = 700 ± 70 mVp-p
Checking method:
(1) In the Video Signal menu “1” Color Bar 100% play back.
(2) Confirm that the B level is A.
Fig. 7-6.
A
A
7.
Checking RGB Output R (RGB Mode)
 (
AEP,UK,RUS)
<Purpose>
This checks RGB video output R level. If it is incorrect, correct colors
will not be displayed when connected to, for instance, projector.
Mode
HLX-504 play back
Signal
Color bars
Test point
Red Out, (15p) (75 
Ω terminated)
Instrument
Oscilloscope
Specification
A = 700 ± 70 mVp-p
Checking method:
(1) In the Video Signal menu “1” Color Bar 100% play back.
(2) Confirm that the R level is A.
Fig. 7-7.
8.
Checking Component Video Output Y
<Purpose>
This checks component video output Y. If it is incorrect, correct
brightness will not be attained when connected to, for instance,
projector.
Mode
HLX-504 play back
Signal
Color bars
Test point
COMPONENT VIDEO OUT (Y)
connector, (75 
Ω terminated)
Instrument
Oscilloscope
Specification
1.0 ± 0.08 Vp-p
Checking method:
(1) In the Video Signal menu “1” Color Bar 100% play back.
(2) Confirm that the Y level is 1.0 ± 0.08 Vp-p.
Fig. 7-2.
A
1.0 ±0.08 Vp-p 
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