Video System Adjustments; Video Sync Level Adjustment (Sy-54 Board); Video Burst Level Adjustment (Sy-54 Board); Video Y Level Check (Sy-54 Board) - Sony DSC-F55 Service Manual

1-3.

VIDEO SYSTEM ADJUSTMENTS

1. Video Sync Level Adjustment (SY-54 board)

Adjust the sync level of the composite video signal output.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
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.
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PLAY
Arbitrary
Video terminal of AV OUT jack
(75Ω terminated)
Oscilloscope
F
65
A = 290 ± 5mV (NTSC)
A = 305 ± 5mV (PAL)
H
Fig.5-1-8.

2. Video Burst Level Adjustment (SY-54 board)

Adjust the burst level of the composite video signal output.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
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.
A

3. Video Y Level Check (SY-54 board)

Confirm the Y level of the composite video signal output.
Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
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.
5-18
PLAY
Arbitrary
Video terminal of AV OUT jack
(75Ω terminated)
Oscilloscope
F
66
A = 286 ± 5mV (NTSC)
A = 300 ± 5mV (PAL)
H
Fig.5-1-9.
PLAY
Arbitrary
Video terminal of AV OUT jack
(75Ω terminated)
Oscilloscope
A = 714 ± 20mV (NTSC)
A = 700 ± 20mV (PAL)
White (100 IRE)
H
Fig.5-1-10.
A
A