5-32
3. VCO Adjustment (SY-66 Board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode
PLAY
Signal
Arbitrary
Measurement Point
CH1: Pin
7
of CN706
(HSY)
CH2: Video terminal of A/V
OUTjack
(75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D7 (NTSC)
DD (PAL)
Specified Value
T = 2.04
±
0.1
µ
s (NTSC)
T = 3.06
±
0.1
µ
s (PAL)
Menu setting:
1) VIDEO OUT of SET UP menu
.................................. NTSC (NTSC mode)
(This adjustment must be performed in NTSC mode, so don’t
set the menu setting to “PAL” )
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Change the data and set the
2
D
D7
phase difference (T) to the
NTSC specified value.
3
D
D7
Press PAUSE button.
Change the data and set the
4
D
DD
phase difference (T) to the
PAL specified value.
5
D
DD
Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
0
01
00
H
T
CH2
magnified
CH1
CH2
CH1
T: Between the center of HSY signal rising and
VIDEO SYNC signal rising
Fig. 5-1-20