5-30
2. VCO Adjustment (SY-54 board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode PLAY
Signal Arbitrary
Measurement Point Pin 7 of CN801 (HSY)
Measuring Instrument Frequency counter
Adjustment Page D
Adjustment Address 87 (NTSC)
8D (PAL)
Specified Value f = 15734 ± 30Hz (NTSC)
f = 15625 ± 30Hz (PAL)
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: F1, set data: 01.
3) For NTSC model, select page: D, address: 87, change the data
and set the frequency (f) to the specified value.
For PAL model, select page: D, address: 8D, change the data
and set the frequency (f) to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 5, address: F1, set data: 00.
6) Select page: 0, address: 01, and set data: 00.
3. D Range Adjustment (SY-54 board)
Set the D range of the RGB decoder used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode PLAY
Signal Arbitrary
Measurement Point Pin 9 of CN801 (VG)
External trigger: Pin 8 of CN801
(COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address 85
Specified Value A = 3.62 ± 0.05V
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: F1, set data: 03.
3) Select page: D, address: 85, 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: 5, address: F1, set data: 00.
6) Select page: 0, address: 01, and set data: 00.
Fig.5-1-18.
A
2H
Pedestal
Pedestal
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