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2-4.
VIDEO SYSTEM CHECK
2-4-1.
Playback Level Check (MA-360 board)
[Adjustment purpose]
Confirm that the playback video signal level is within the
specification.
Mode
Playback
Signal
Alignment tape: SP mode color bar
portion
CN261 !º pin (VIDEO IN)
Measurement Point
(CN501 !º pin of VD-29 board)
Measuring Instrument
Oscilloscope
Specified Value
A = 2.10 ± 0.14 V
[Check method]
1) Check that the video signal level (A) satisfies the specified
value.
H
Fig. 6-2-5
2-4-2.
Sync AGC Check (MA-360 board)
[Adjustment purpose]
Confirm that the E-E video output level is within the specification.
Mode
E-E
Signal
Color bar
CN261 !º pin (VIDEO IN)
Measurement Point
(CN501 !º pin of VD-29 board)
Measuring Instrument
Oscilloscope
Specified Value
A = 2.10 ± 0.14 V
Switch setting:
INPUT SELECT ........................................................................ L1
[Check method]
1) Input a color bar signal to VIDEO LINE-1 terminal.
2) Check that the video signal level (A) satisfies the specified
value.
H
Fig. 6-2-6
White (100%)
White (100%)
2-4-3.
Deviation Check
[Adjustment purpose]
Confirm that the YFM signal deviation is within the specification.
Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
Note: This check should be carried out upon completion of "Playback
Level Check" and "Sync AGC Check".
Switch setting:
INPUT SELECT ........................................................................ L1
[Check method]
1) Record the color bar signal.
2) Playback the recorded section.
3) Check that the video signal level (A) satisfies the specified
value.
A
A
6-4
Recording and playback (SP mode)
Color bar
CN261 !º pin (VIDEO IN)
(CN501 !º pin of VD-29 board)
Oscilloscope
A = 2.10 ± 0.14 V
White (100%)
H
Fig. 6-2-7
A
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