Video System Adjustments; Base Band Block Adjustments; S Video Out Y Level Adjustment (Vc-245 Board) - Sony DCR-PC4E Service Manual

3-4.

VIDEO SYSTEM ADJUSTMENTS

Before perform the video system adjustments, check that the
specified value of "36MHz Origin Oscillation Adjustment" of
"CAMERA SYSTEM ADJUSTMENT" is satisfied.

3-4-1. Base Band Block Adjustments

1. Chroma BPF f Adjustment (VC-245 Board)
0
Set the center frequency of IC1301 chroma band-pass filter.
Mode Camera
Subject All black
(Cover the lens with the lens cap)
Measurement Point CH1: Chroma signal terminal of
S VIDEO jack (75Ω terminated)
CH2: Y signal terminal of S VIDEO
jack (75Ω terminated)
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 28
Specified Value A = 100mVp-p or less
B = 200mVp-p or more
Adjusting method:
Order Page Address Data
1 0 01 01
2
3 3 0C 04
4 C 28
5 C 28
6 3 0C 00
7
8 0 01 00
When the data of page: 3, address: 0C, is 04:
A
CH1
CH2
When the data of page: 3, address: 0C, is 00:
CH1
Fig. 5-3-7.
Procedure
Set the data.
Check that the burst signal (B) is
output to the chroma signal
terminal of S VIDEO jack.
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.
Set the data, and press PAUSE
button.
Check that the burst signal level
(B) satisfies the specified value.
Set the data.
H
H

2. S VIDEO OUT Y Level Adjustment (VC-245 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
5-46
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. 5-3-8.
A