Sony DVMC-DA1 Service Manual page 32

4-4. VIDEO SYSTEM ADJUSTMENTS
Connection of Video System Measuring Instruments
Connect the video system measuring instruments as shown in Fig.
4-3.
Pattern generator
1. Chroma BPF f Adjustment
0
Set the center frequency of IC001 chroma band-pass filter.
Mode Digital EE
Signal No signal
Measurement Point CH1: Chroma signal terminal of
S VIDEO jack (75 Ω terminated)
CH2: Y signal terminal of S VIDEO
jack (75 Ω terminated)
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 2B
Specified Value A = 100mVp-p or less
B = 200mVp-p or more
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: C, address: 56, set data: 00, and press the PAUSE
button of the adjustment remote commander. (digital EE mode)
3) Check that the burst signal (B) is output to the chroma signal
terminal.
4) Select page: 3, address: 0C, set data: 04, and press the PAUSE
button of the adjustment remote commander.
5) Select page: C, address: 2B, and change the data (in the range
of 00 to 07) for minimum amplitude of the burst signal level
(A).
6) Press the PAUSE button of the adjustment remote commander.
7) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button of the adjustment remote commander.
8) Check that the burst signal level (B) is satisfied the specified
value.
9) Select page: C, address: 56, set data: 08, and press the PAUSE
button of the adjustment remote commander.
10) Select page: 0, address: 01, and set data: 00.
Video out
Video in
S video out
Y
C
Fig. 4-3
When the page: 3, address: 0C data is 04:
CH1
CH2
When the page: 3, address: 0C data 00.
CH1
4-5
TV monitor
Oscilloscope
VIDEO
A
H
H
Fig. 4-4
B