4-4
VIDEO BLOCK
[Free-Run Frequency Adjustment (1)] (VI-40 board)
Note 1:
Connect IC108
5
pin to the GND via 0.1µF capacitor (chroma
signal grounded.)
Adjustment Procedure:
(1)
Connect IC108
7
pin to the GND via 1 M
Ω
resisitor.
(2)
Adjust CT102 so that the frequency counter reading satisfies
the specification value.
[Free-Run Frequency Adjustment (2)] (DK-40 board)
Adjustment Procedure:
(1)
Adjust CT500 so that the frequency counter reading satisfies
the specification value.
[910fh Adjustment] (DK-40 board)
Adjustment Procedure:
(1)
Adjust CT401 so that the digital voltmeter reading satisfies
the specification value.
[Y/C Separation Y Level Adjustment] (VI-40 board)
Adjustment Procedure:
(1)
Adjust RV103 so that the
A
level (white) of waveform on
the oscilloscope satisfies the specification value.
Fig. 4-5
Mode
VIDEO Input
Signal
Color bar (S-VIDEO IN) (Note 1)
Measuring point
IC108
!•
pin
Measuring equipment
Frequency Counter
Adjustment part
CT102
Specification value
3.579545 MHz ± 30 Hz
Mode
VIDEO Input
Signal
Color bar (S-VIDEO IN)
Measuring point
IC407
`⁄⁄‹
pin
Measuring equipment
Frequency Counter
Adjustment part
CT500
Specification value
14.31818 MHz ± 100 Hz
Mode
VIDEO Input
Signal
Color bar (VIDEO IN)
Measuring point
CL138
Measuring equipment
Oscilloscope
Adjustment part
RV103
Specification value
1.00 ± 0.02Vp-p
[Y/C Separation CHROMA Level] (VI-40 board)
Adjustment Procedure:
(1)
Adjust RV102 so that the
A
level (white) of waveform on
the oscilloscope satisfies the specification value.
Fig. 4-6
[D/A Output Y Level Adjustment] (DK-40 board)
Note:
Turn of the power switch once, then turn it on again.
Adjustment Procedure:
(1)
Adjust RV401 so that the
A
level (white) of waveform on
the oscilloscope satisfies the specification value.
Fig. 4-7
Mode
VIDEO Input
Signal
Color bar (VIDEO IN)
Measuring point
J1802 (OUTPUT)
Measuring equipment
Oscilloscope
Adjustment part
RV401
Specification value
535 ± 15 mVp-p
White (75%)
H
A
Mode
VIDEO Input
Signal
Color bar (S-VIDEO IN)
Measuring point
IC401
!¡
pin (or CL427)
Measuring equipment
Digital Voltmeter
Adjustment part
CT401
Specification value
2.5 ± 0.1 Vdc
White (100%)
H
A
Mode
VIDEO Input
Signal
Color bar (VIDEO IN)
Measuring point
CL129
Measuring equipment
Oscilloscope
Adjustment part
RV102
Specification value
286 ± 6 mVp-p
A
H
Содержание DPP-MS300 Marketing
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