Vco Adjustment (Pd-137 Board) - Sony DSC-P1 Service Manual And Parts List
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Also See for DSC-P1:
- Operating instructions manual (72 pages) ,
- Service manual (105 pages)
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2. VCO Adjustment (PD-137 Board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
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
1
0
2
D
3
D
4
D
5
6
7
8
D
Note: Refer to table 5-2-2. "Hexadecimal-decimal conversion
table"
Processing after Completing Adjustments:
Order Page Address Data
1
0
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PLAY
Arbitrary
CH1: Pin 7 of CN881
(HSY)
CH2: Video terminal of A/V
OUTjack
(75 Ω terminated)
Oscilloscope
D
D7 (NTSC)
DD (PAL)
T = 2.04 ± 0.1 µs (TYPE ST)
T = 1.92 ± 0.1 µs (TYPE SA)
Procedure
01
01
Change the data and set the
D7
phase difference (T) to the
specified value.
D7
Press PAUSE button.
Read the data and this data is
D7
named D
D7
Conver D
to decimal
D7
notation, and obtain D
(Note)
Calculate D
' using
DD
following equations (decimal
calculation)
D
' = D
' + 26 (TYPE ST)
DD
D7
D
' = D
' + 40 (TYPE SA)
DD
D7
Conver D
' to a hexadecimal
DD
number, and obtain D
(Note)
DD
D
Press PAUSE button.
DD
Procedure
01
00
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CH1
CH2
magnified
CH1
CH2
T: Between the center of HSY signal rising and
VIDEO SYNC signal rising
'
D7
DD
5-28
H
T
Fig. 5-1-21
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