Sony Mavica MVC-FD91, Руководство по обслуживанию

Страница: 83 / 114

5-25
Fig. 5-1-20.
2. VCO Adjustment (PK-45 board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode Playback
Signal arbitrary
Measurement Point Pin
7
of CN701 (HSY)
Measuring Instrument Frequency counter
Adjustment Page F
Adjustment Address 35
Specified Value f = 13200 ± 30Hz
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 02, and set data: 01.
3) Select page: 3, address: 19, and set data: 20.
4) Select page: F, address: 35, change the data and set the
frequency (f) to the specified value.
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: 3, address: 02, and set data: 00.
7) Select page: 3, address: 19, and set data: 00.
8) Select page: 0, address: 01, and set data: 00.
3. D range Adjustment (PK-45 board)
Set the D range of the LCD driver to the specified value. If deviated,
the LCD screen will become blackish or saturated (whitish).
Mode Playback
Signa Alignment disk (TFD2-1(+) or TFD2-
2(–)):
Stair step signal of 10 steps (MVC-
006T.JPG)
Measurement Point Pin
9
of CN701 (VG)
External trigger: Pin
8
of CN701
(COM)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 37
Specified Value A = 3.20 ± 0.05V
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 02, and set data: 01.
3) Select page: F, address: 37, change the data and set the voltage
(A) between the reversed waveform pedestal and non-reversed
waveform pedestal to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 3, address: 02, and set data: 00.
6) Select page: 0, address: 01, and set data: 00.
Pedestal
Pedestal
A
2H