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VIDEO BLOCK
To adjust the video block, connect a pattern generator as shown
below. As video input signals for adjustment, enter video output
signals (color bar signals), unless otherwise specified. (For details,
see page 17)
Pattern Generator
VIDEO IN jack (J101)
[Color Demodulation Subcarrier Adjustment]
Condition:
Input signal
No signal
YM-11P board CN102 pin 0
Measurement point
Measuring equipment
Frequency Counter
Adjustment page
D
Adjustment address
2F
Specification value
4.433619 MHz ± 25 Hz
Connection:
YM-11P Board
CN102 pin 0
(SC OUT)
Adjustment Procedure:
(1) Connect a frequency counter to the CN102 pin 0 on YM-11P
board.
(2) Connect CN102 pin 2 and pin 1 on the YM-11P board.
(OSD internal video signal OFF)
(3) Set (or confirm) data: 01 to page: 1, address: 00.
(Cancel D page protect)
(4) On page: D, address: 2F, change data with the PLAY and STOP
buttons and press the PAUSE button to write data so that the
frequency counter reading satisfies the specification value.
(5) Disconnect CN102 pin 2 and pin 1 on the YM-11P board.
(OSD internal video signal ON)
Adjustment and Adjustment Parts: YM-11P board (see page 33)
[OSD (On-Screen Display) Horizontal Sync Frequency
Adjustment]
Condition:
Input signal
Color bar signal
YM-11P board CN102 pin 6
Measurement point
Measuring equipment
Oscilloscope
Adjustment device
RV101 on YM-11P board
Specification value
2.2 ± 0.1 µS
Set
Frequency Counter
+
–
Connection:
YM-11P Board
CN102 pin 6 (HAFC)
CN102 pin 1 (T.GND)
Adjustment Procedure:
(1) Select EXT. VIDEO AUDIO mode. (See page 22)
(2) Connect an oscilloscope to the CN102 pin 6 on YM-11P
board.
(3) Adjust RV101 on the YM-11P board so that the A level of
waveform on the oscilloscope satisfies the specification value.
Adjustment and Adjustment Parts: YM-11P board (see page 33)
[OSD (On-Screen Display) Internal Signal DC Level Ad-
justment]
Condition:
Input signal
Measurement point
Measuring equipment
Adjustment page
Adjustment address
Specification value
Connection:
YM-11P Board
CN102 pin 9 (VCLVL)
CN102 pin 1 (T.GND)
Adjustment Procedure:
(1) Connect a digital voltmeter to the CN102 pin 9 on YM-11P
board.
(2) Set (or confirm) data: 01 to page: 1, address: 00.
(Cancel D page protect)
(3) On page: D, address: 2E, change data with the PLAY and STOP
buttons and press the PAUSE button to write data so that the
digital voltmeter reading satisfies the specification value.
Adjustment and Adjustment Parts: YM-11P board (see page 33)
– 26 –
Oscilloscope
(DC range)
+
–
1 V/DIV
2 µ sec/DIV
A
Color bar signal
YM-11P board CN102 pin 9
Digital voltmeter
D
2E
2.5 ± 0.1 V
Digital Voltmeter
+
–
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