Sony DVP-LS755P Service Manual ▷ View online
6-10 E
2-3-6. FLD Grid Test Display and SHUTTLE Click
Operation Test
2-3-6-1. Transition Keys in Self Check Mode
•
↑
key on the remote commander
• SHUTTLE on the remote commander during Grid Test display
(This model does not provide JOG/SHUTTLE, and therefore
use another DVD remote commander having the JOG/
SHUTTLE)
use another DVD remote commander having the JOG/
SHUTTLE)
2-3-6-2. Operation and Display
The Self Check Mode transits to this mode when
↑
key is en-
tered. This tests whether each grid turns on individually. The first
grid only of FLD turns on and other grids turn off. Each time the
SHUTTLE is entered, the grid is switched in order. When
SHUTTLE input is clockwise, the grid switches in 1
grid only of FLD turns on and other grids turn off. Each time the
SHUTTLE is entered, the grid is switched in order. When
SHUTTLE input is clockwise, the grid switches in 1
→ 2 → 3
direction, or counterclockwise it switches in 3
→ 2 → 1 direction.
Display at the start of Grid Test
↓ (Input in CW direction)
2-3-7. LED Test Display
2-3-7-1. Transition Keys in Self Check Mode
2-3-7-1. Transition Keys in Self Check Mode
•
↓
key on the remote commander
• SHUTTLE on the remote commander during LED Test display
(This model does not provide JOG/SHUTTLE, and therefore
use another DVD remote commander having the JOG/
SHUTTLE)
use another DVD remote commander having the JOG/
SHUTTLE)
2-3-7-2. Operation and Display
LED is switched in order by the input of JOG/SHUTTLE. Also,
LED ON/OFF is switched by the input of same key as the function
that turns on the LED concerned.
LED ON/OFF is switched by the input of same key as the function
that turns on the LED concerned.
FLD display during LED Test
7-1
7-1. POWER SUPPLY CHECK
1. POWER SUPPLY BLOCK
(SWITCHING REGULATOR)
Mode
E-E
Instrument
Digital voltmeter
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
3.3
± 0.2 Vdc
SW +5 V Check
Test point
CN201 pin 6
Specification
5.0
± 0.3 Vdc
SW +8 V Check
Test point
CN201 pin 1
Specification
8.0
± 1.0 Vdc
EVER +11 V Check
Test point
CN201 pin 3
Specification
11.2
± 1.0 Vdc
EVER –10 V Check
Test point
CN201 pin 0
Specification
–10.0
± 1.0 Vdc
Checking method:
1) Confirm that each voltage satisfies the specification.
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.
part of the primary side, never touch it to avoid electrical shock.
SECTION 7
ELECTRICAL ADJUSTMENT
DVP-LS755P
Note:
During diagnostic check, the characters and color bars can
be seen only with the NTSC monitor. Therefore, for diag-
nostic check, use the monitor that supports both NTSC and
PAL modes.
Use the reference disc for PAL for check, and use the refer-
ence disc for NTSC for adjustment.
be seen only with the NTSC monitor. Therefore, for diag-
nostic check, use the monitor that supports both NTSC and
PAL modes.
Use the reference disc for PAL for check, and use the refer-
ence 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) 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-D167P)
6) DVD reference disc
4) Digital voltmeter
5) Standard commander (RMT-D167P)
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-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)
8) Extention Cable (J-6090-107-A)
7-2
2. Checking Progressive Video Output Level
<Purpose>
This checks whether progressive video output. If it is incorrect,
correct brightness will not be attained when connected to, for in-
stance, projector.
This checks whether progressive video output. If it is incorrect,
correct brightness will not be attained when connected to, for in-
stance, projector.
Mode
Play
Signal
Check the Color-bar (100%) signal
on DVD reference disc
on DVD reference disc
Measurement Point
COMPONENT VIDEO OUT (Y)
connector (75
connector (75
Ω terminated)
Measuring Instrument
Oscilloscope
Specification
1.00
Vp-p
Checking method:
1) Confirm that the Progressive video output 1.00
1) Confirm that the Progressive video output 1.00
Vp-p
Figure 7-2
7-2. ADJUSTMENT OF VIDEO SYSTEM
1. Checking Video Output Level
<Purpose>
This checks whether Video Output level satisfy the NTSC/PAL
standard. If it is not correct, the brightness will be too large or
small.
This checks whether Video Output level satisfy the NTSC/PAL
standard. If it is not correct, the brightness will be too large or
small.
Mode
Play
Signal
Check the Color-bar (100%) signal
on DVD reference disc
on DVD reference disc
Measurement Point
LINE OUT (VIDEO) connector
(75
(75
Ω terminated)
Measuring Instrument
Oscilloscope
Specification
1.00 Vp-p
Checking method:
1) Confirm that the Video Output level is 1.00 Vp-p.
1) Confirm that the Video Output level is 1.00 Vp-p.
Figure 7-1
3. 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
Play
Signal
Check the Color-bar (100%) signal
on DVD reference disc
on DVD reference disc
Measurement Point
S VIDEO OUT (S-Y) connector
(75
(75
Ω terminated)
Measuring Instrument
Oscilloscope
Specification
1.00
± 0.05 Vp-p
Checking method:
1) Confirm that the S-Y level is 1.00
1) Confirm that the S-Y level is 1.00
± 0.05 Vp-p.
Figure 7-3
4. Checking S Video Output S-C
<Purpose>
This checks whether the S video output 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 video output S-C satisfies the NTSC/
PAL Standard. If it is not correct, the colors will be too dark or
light.
Mode
Play
Signal
Check the Color-bar (100%) signal
on DVD reference disc
on DVD reference disc
Measurement Point
S VIDEO OUT (S-C) connector
(75
(75
Ω terminated)
Measuring Instrument
Oscilloscope
Specification
A = 286
± 30 mVp-p (NTSC)
A = 300
± 100 mVp-p (PAL)
Checking method:
1) Confirm that the S-C burst is “A”.
1) Confirm that the S-C burst is “A”.
Figure 7-4
+0.04
–0.02
–0.02
+ 0.04
– 0.02
– 0.02
1.00 Vp-p
+0.04
–0.02
–0.02
+ 0.04
– 0.02
– 0.02
+ 0.04
– 0.02
– 0.02
1.00
Vp-p
+ 0.04
– 0.02
– 0.02
1.00
±
0.05 Vp-p
A
7-3
7. Checking Component Video Output R-Y
<Purpose>
This checks component video output R-Y. If it is incorrect, cor-
rect colors will not be displayed when connected to, for instance,
component input projector.
This checks component video output R-Y. If it is incorrect, cor-
rect colors will not be displayed when connected to, for instance,
component input projector.
Mode
Play
Signal
Check the Color-bar (100%) signal
on DVD reference disc
on DVD reference disc
Measurement Point
COMPONENT VIDEO OUT (C
R
)
connector (75
Ω terminated)
Measuring Instrument
Oscilloscope
Specification
700
± 50 mVp-p
Checking method:
1) Confirm that the R-Y level is 700
1) Confirm that the R-Y level is 700
± 50 mVp-p.
Figure 7-7
5. 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.
This checks component video output Y. If it is incorrect, correct
brightness will not be attained when connected to, for instance,
projector.
Mode
Play
Signal
Check the Color-bar (100%) signal
on DVD reference disc
on DVD reference disc
Measurement Point
COMPONENT VIDEO OUT (Y)
connector (75
connector (75
Ω terminated)
Measuring Instrument
Oscilloscope
Specification
1.00
± 0.05 Vp-p
Checking method:
1) Confirm that the Y level is 1.00
1) Confirm that the Y level is 1.00
± 0.05 Vp-p.
Figure 7-5
6. Checking Component Video Output B-Y
<Purpose>
This checks component video output B-Y. If it is incorrect, cor-
rect colors will not be displayed when connected to, for instance,
component input projector.
This checks component video output B-Y. If it is incorrect, cor-
rect colors will not be displayed when connected to, for instance,
component input projector.
Mode
Play
Signal
Check the Color-bar (100%) signal
on DVD reference disc
on DVD reference disc
Measurement Point
COMPONENT VIDEO OUT (C
B
)
connector (75
Ω terminated)
Measuring Instrument
Oscilloscope
Specification
700
± 50 mVp-p
Checking method:
1) Confirm that the B-Y level is 700
1) Confirm that the B-Y level is 700
± 50 mVp-p.
Figure 7-6
8. Checking RGB Output R
<Purpose>
This checks RGB output R. If it is incorrect, pictures will not be
displayed correctly in spite of connection to the TV with an EURO
AV connecting cord.
This checks RGB output R. If it is incorrect, pictures will not be
displayed correctly in spite of connection to the TV with an EURO
AV connecting cord.
Mode
Play
Signal
Check the Color-bar (100%) signal
on DVD reference disc
on DVD reference disc
Measurement Point
LINE (RGB)-TV connector
pin qg (75
pin qg (75
Ω terminated)
Measuring Instrument
Oscilloscope
Specification
700
± 100 mVp-p
Checking method:
1) Confirm that the R level is 700
1) Confirm that the R level is 700
± 100 mVp-p.
Figure 7-8
1.00
±
0.05 Vp-p
700
±
50 mVp-p
700
±
50 mVp-p
700
±
100 mVp-p
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