Video System Adjustments; Base Band Block Adjustments; S Video Out Y Level Adjustment (Vc-358D Board) - Sony DSR-PD170 Service Manual

DSR-PD170/PD170P/PD190P
3-4.

VIDEO SYSTEM ADJUSTMENTS

Before perform the video system adjustments, check that the
specified value of "27MHz Origin Oscillation Adjustment" of
"CAMERA SYSTEM ADJUSTMENT" is satisfied.

3-4-1. Base Band Block Adjustments

1. Chroma BPF f Adjustment (VC-358D board)
0
Set the center frequency of IC1301 chroma band-pass filter.
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2
3 3 0C
4 C 28
5 C 28
6 3 0C
7
8 0 01
When the data of page: 3, address: 0C, is 04:
A
CH1
CH2
When the data of page: 3, address: 0C, is 00:
CH1
Camera
All black
(Cover the lens with the lens cap)
CH1: Chroma signal terminal of
S VIDEO jack (75Ω terminated)
CH2: Y signal terminal of S VIDEO
jack (75Ω terminated)
Oscilloscope
C
28
A = 100mVp-p or less
B = 200mVp-p or more
Procedure
01 Set the data.
Check that the burst signal (B) is
output to the chroma signal
terminal of S VIDEO jack.
04 Set the data, and press PAUSE
button.
Change the data for minimum
amplitude of the burst signal
level (A).
(The data should be "00" to
"07".)
Press PAUSE button.
00 Set the data, and press PAUSE
button.
Check that the burst signal level
(B) satisfies the specified value.
00 Set the data.
H
H
Fig. 6-3-7.

2. S VIDEO OUT Y Level Adjustment (VC-358D board)

Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 2 35
3 2 35
4 3 0C
5 C 25
6 C 25
7 3 0C
8 2 35
9 0 01
B
6-68
Camera
Arbitrary
Y signal terminal of S VIDEO jack
(75Ω terminated)
Oscilloscope
C
25
A = 1000 ± 14mV
Procedure
01 Set the data.
Note down the data.
01 Set the data.
02 Set the data, and press PAUSE
button.
Change the data and set the Y
signal level (A) to the specified
value.
Press PAUSE button.
00 Set the data, and press PAUSE
button.
Set the data that is noted down at
step 2.
00 Set the data.
Center of luminance line
H
Fig. 6-3-8.
A