Sony GV-D300 Operating Instructions (primary manual), Service Manual

Page: 85 / 148

5-21
10. S VIDEO Output Chroma Level Adjustment
(CB-61 Board)
Set the chroma signal level of the S video output signal.
Mode VTR stop
Signal No signal
Measurement Point Chroma signal terminal of S VIDEO
jack (75
Ω
terminated)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address 94
Specified Value A = 286 ± 6mV (NTSC)
A = 300 ± 6mV (PAL)
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 15, after memorizing the data, set the
bit value of bit2 to “0”. (Refer to “4-3, 3. Bit value
discrimination” of “5-4. Service Mode”).
3) Select page: D, address: 94, change the data and set the burst
signal level (A) to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: D, address: 15, and set the data memorized at step
2).
6) Press the PAUSE button of the adjustment remote commander.
7) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-15
11. AFC TC Adjustment (CB-61 Board)
Set the picture frame in recording.
Mode VTR stop
Signal 75% color bar (VIDEO jack input)
Measurement Point Y signal terminal of S VIDEO jack
(75
Ω
terminated)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address A2
Specified Value t
2
– t
1
= 0 ± 0.05
µ
sec
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 13, and set data: FE.
3) Check the delay time (t
1
).
4) Select page: 2, address: 13, and set data: FF.
5) Select page: D, address: A2, change the data so that the delay
time (t
2
) is equal to the delay time (t
1
) of step 3).
6) Press the PAUSE button of the adjustment remote commander.
7) Select page: 2, address: 13, and set data: 00.
8) Select page: 0, address: 01, and set data: 00.
For NTSC model
For PAL model
Fig. 5-3-16
A
H
H
t
1
or t
2
H
t
1
or t
2