5-18
1-3. VIDEO SYSTEM ADJUSTMENTS
1. Video Sync Level Adjustment (SY-54 board)
Adjust the sync level of the composite video signal output.
Mode PLAY
Signal Arbitrary
Measurement Point Video terminal of AV OUT jack
(75Ω terminated)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 65
Specified Value A = 290 ± 5mV (NTSC)
A = 305 ± 5mV (PAL)
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: F1, and set data: 04.
3) Select page: F, address: 65, change the data and set the sync
level (A) to the specified value.
4) Select page: 5, address: F1, and set data: 00.
5) Select page: 0, address: 01, and set data: 00.
2. Video Burst Level Adjustment (SY-54 board)
Adjust the burst level of the composite video signal output.
Mode PLAY
Signal Arbitrary
Measurement Point Video terminal of AV OUT jack
(75Ω terminated)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 66
Specified Value A = 286 ± 5mV (NTSC)
A = 300 ± 5mV (PAL)
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: F1, and set data: 04.
3) Select page: F, address: 66, change the data and set the burst
level (A) to the specified value.
4) Select page: 5, address: F1, and set data: 00.
5) Select page: 0, address: 01, and set data: 00.
3. Video Y Level Check (SY-54 board)
Confirm the Y level of the composite video signal output.
Mode PLAY
Signal Arbitrary
Measurement Point Video terminal of AV OUT jack
(75Ω terminated)
Measuring Instrument Oscilloscope
Specified Value A = 714 ± 20mV (NTSC)
A = 700 ± 20mV (PAL)
Adjusting method:
1) Select page: 5, address: F1, and set data: 04.
2) Check that the white (100 IRE) level (A) satisfies the specified
value.
3) Select page: 5, address: F1, and set data: 00.
A
H
A
H
A
White (100 IRE)
H
Fig.5-1-8.
Fig.5-1-9.
Fig.5-1-10.
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