Vco Adjustment (Pk-61 Board) - Sony MVC-FD100 Service Manual

MVC-FD100/FD100H/FD200/FD200H

2. VCO Adjustment (PK-61 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 01
2 D D7
3 D D7
4 D DD
5 D DD
Processing after Completing Adjustments:
Order Page Address Data
1 0 01
PLAY
Arbitrary
CH1: Pin 7 of CN803 on FC-89
board (HSY)
CH2: Video terminal of VIDEO
OUT jack
(75 Ω terminated)
Oscilloscope
D
D7 (NTSC)
DD (PAL)
NTSC: T = 2.05 ± 0.1 µs
PAL: T = 3.15 ± 0.1 µs
Procedure
01
Change the data and set the
phase difference (T) to the
NTSC specified value.
Press PAUSE button.
Change the data and set the
phase difference (T) to the
PAL specified value.
Press PAUSE button.
Procedure
00
CH1
CH2
magnified
CH1
CH2
T: Between the center of HSY signal rising and
VIDEO SYNC signal rising
5-36
H
T
Fig. 5-1-22