Sony DVP-K370 (serv.man2) Service Manual ▷ View online
7-1
DVP-K370
SECTION 7
ELECTRICAL ADJUSTMENT
7-1. POWER SUPPLY CHECK
1.
HS11S1U/HS11S1F/ETXNY381N2F Boards
Mode
E-E
Instrument
Digital voltmeter
EVER +3.3 V Check
Test point
CN201 pin qa
Specification
3.5 ± 0.2 Vdc
SW +3.3 V Check
Test point
CN201 pin 8
Specification
3.3 ± 0.2 Vdc
+5 V Check
Test point
CN201 pin qs
Specification
5.0 ± 0.3 Vdc
SW +11 V Check
Test point
CN201 pin 6, 7
Specification
11.0 ± 1.0 Vdc
EVER +11 V Check
Test point
CN201 pin qd
Specification
11.0 ± 1.0 Vdc
EVER –13 V Check
Test point
CN201 pin 3
Specification
–13.0 ± 1.0 Vdc
Checking method:
1)
1)
Confirm that each voltage satisfies the specification.
Note
Because the heatsink installed on the power supply board is a part of the
primary side, never touch it to avoid electrical shock.
Because the heatsink installed on the power supply board is a part of the
primary side, never touch it to avoid electrical shock.
In making adjustment, refer to 7-3. Adjustment
Related Parts Arrangement.
Related Parts Arrangement.
Note: During diagnostic check, the characters and color bars can be seen
only with the NTSC monitor. Therefore, for diagnostic check, use
the monitor that supports both NTSC and PAL modes.
Use the reference disc for PAL for check, and use the reference disc
for NTSC for adjustment.
the monitor that supports both NTSC and PAL modes.
Use the reference disc for PAL for check, and use the reference disc
for NTSC for adjustment.
This section describes procedures and instructions necessary for
adjusting electrical circuits in this set.
adjusting electrical circuits in this set.
Instruments required:
1)
1)
Color monitor TV
2)
Oscilloscope 1 or 2 phenomena, band width over 100 MHz,
with delay mode
with delay mode
3)
Frequency counter (over 8 digits)
4)
Digital voltmeter
5)
Standard commander (RMT-127E)
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-506 (J-6090-077-A) (single layer) (PAL)
HLX-507 (J-6090-078-A)(dual layer) (PAL)
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-506 (J-6090-077-A) (single layer) (PAL)
HLX-507 (J-6090-078-A)(dual layer) (PAL)
7)
SACD reference disc
HLXA-509 (J-6090-090-A)
HLXA-509 (J-6090-090-A)
8)
Extention Cable (J-6090-107-A)
7-2
3.
Checking S Video Output S-C
<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.
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
Video level adjustment in test mode
Signal
Color bars
Test point
S VIDEO OUT (S-C) connector
(75
(75
Ω terminated)
Instrument
Oscilloscope
Specification
A = 286 ± 30 mVp-p (NTSC)
A = 300 ± 100 mVp-p (PAL)
A = 300 ± 100 mVp-p (PAL)
Checking 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) Confirm that the S-C burst is “A”.
Fig.7-3.
4. 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.
<Purpose>
This checks component video output Y. If it is incorrect, correct
brightness will not be attained when connected to, for instance,
projector.
Mode
Video level adjustment in test mode
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) 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) Confirm that the Y level is 1.0 ± 0.05 Vp-p.
Fig.7-4.
7-2. ADJUSTMENT OF VIDEO SYSTEM
1.
Video Level Adjustment (MB-103 BOARD)
<Purpose>
This adjustment is made to satisfy the NTSC/PAL standard, and if
not adjusted correctly, the brightness will be too large or small.
This adjustment is made to satisfy the NTSC/PAL 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 RV501 to attain 1.0 Vp-p.
Fig.7-1.
2.
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.
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
Video level adjustment in test mode
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) 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) Confirm that the S-Y level is 1.0 ± 0.05 Vp-p.
Fig.7-2.
+0.04
–0.02
–0.02
+0.04
–0.02
–0.02
1.0 Vp-p
+0.04
–0.02
–0.02
A
1.0 ± 0.05 Vp-p
1.0 ± 0.05 Vp-p
7-3
5.
Checking Component Video Output B-Y
<Purpose>
This checks component video output B-Y. If it is incorrect, correct
colors will not be displayed when connected to, for instance,
projector.
This checks component video output B-Y. If it is incorrect, correct
colors will not be displayed when connected to, for instance,
projector.
Mode
Video level adjustment in test mode
Signal
Color bars
Test point
COMPONENT VIDEO OUT (P
B
)
connector (75
Ω terminated)
Instrument
Oscilloscope
Specification
700 ± 50 mVp-p
Checking method:
1)
1)
In the test mode initial menu “6” Video Level Adjustment, set
so that color bars are generated.
so that color bars are generated.
2)
Confirm that the B-Y level is 700 ± 50 mVp-p.
Fig.7-5.
700 ± 50 mVp-p
700 ± 50 mVp-p
6.
Checking Component Video Output R-Y
<Purpose>
This checks component video output R-Y. If it is incorrect, correct
colors will not be displayed when connected to, for instance,
projector.
This checks component video output R-Y. If it is incorrect, correct
colors will not be displayed when connected to, for instance,
projector.
Mode
Video level adjustment in test mode
Signal
Color bars
Test point
COMPONENT VIDEO OUT (P
R
)
connector (75
Ω terminated)
Instrument
Oscilloscope
Specification
700 ± 50 mVp-p
Checking method:
1)
1)
In the test mode initial menu “6” Video Level Adjustment, set
so that color bars are generated.
so that color bars are generated.
2)
Confirm that the R-Y level is 700 ± 50 mVp-p.
Fig.7-6.
7-4E
7-3. ADJUSTMENT RELATED PARTS
ARRANGEMENT
MB-103 BOARD (Side A)
RV401
IC403
VIDEO LEVEL ADJ
CN201
13
1
HS11S1U/HS11S1F/ETXNY381N2F BOARDS (Side A)
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