27
HCD-M90
– DVD BOARD (Side A) –
RV501
Video Level
Adjustment
IC503
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
Instruments required:
1) Color monitor TV
2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz,
with delay mode
3) 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)
VIDEO LEVEL ADJUSTMENT
<Purpose>
This adjustment is made to satisfy the NTSC/PAL standard, and if
not adjusted correctly, the brightness will be too large or small.
Signal
Color bars
Test point
VIDEO OUT jack
(75
Ω
terminated)
Instrument
Oscilloscope
Adjusting element
RV501 (DVD board)
Specified Value
1.0
+ 0.04
Vp-p
– 0.02
Procedure:
1. Press the
I/
1
key to turn the power on, and turn the
[FUNCTION]
key to select “DVD”.
2. Adjust the RV501 on the MB board to attain 1.0
+ 0.04
Vp-p.
– 0.02
Figure 5-1
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.
Signal
Color bars
Test point
S VIDEO OUT (S-Y) jack
(75
Ω
terminated)
Instrument
Oscilloscope
Specified Value
1.0
±
0.05 Vp-p
Procedure:
1. Press the
I/
1
key to turn the power ON, and turn the
[FUNCTION]
key to select “DVD”.
2. Confirm that the S-Y level is 1.0
±
0.05 Vp-p.
Figure 5-2
CHECKING S VIDEO OUTPUT S-C
<Purpose>
This checks whether the S-C satisfies the NTSC Standard. If it is
not correct, the colors will be too dark or light.
Signal
Color bars
Test point
S VIDEO OUT (S-C) jack
(75
Ω
terminated)
Instrument
Oscilloscope
Specified Value
286
±
30 mVp-p (NTSC)
300
±
100 mVp-p (PAL)
Procedure:
1. Press the
I/
1
key to turn the power ON, and turn the
[FUNCTION]
key to select “DVD”.
2. Confirm that the S-C burst is 286
±
30 mVp-p (NTSC) or 300
±
100 mVp-p (PAL).
Figure 5-3
Adjustment Location :
SECTION 5
ELECTRICAL ADJUSTMENTS
1.0
+ 0.04
Vp-p
– 0.02
1.0
±
0.05 Vp-p
286
±
50 mVp-p
(NTSC)
or
300
±
100 mVp-p
(PAL)
DVD SECTION
