Video System Adjustments; Mhz Origin Oscillation Adjustment (Vc-256 Board) - Sony HANDYCAM DCR-TRV130E Service Manual

3-4.

VIDEO SYSTEM ADJUSTMENTS

1. 27MHz Origin Oscillation Adjustment
(VC-256 Board)
Set the frequency of the clock for synchronization.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.
Mode Camera
Subject Not required
Measurement Point FB1502 (Pin qs of IC1501) or
Pin qh of IC1502
Measuring Instrument Frequency counter
Adjustment Page F
Adjustment Address 4D
Specified Value f=13500000 ± 68Hz
Adjusting method:
Order Page Address Data
1 0 01 01
2 F 4D
3 F 4D
4 0 01 00
VC-256 BOARD
IC1501
36 25
37 24
13
48
1 12
FB1502
Fig. 5-3-6.
Procedure
Set the data.
Change the data and set the
frequency (f) to the specified
value.
Press PAUSE button.
Set the data.
IC1502
36 25
37 24
13
48
1 12
2. Chroma BPF fo Adjustment (VC-256 Board)
Set the center frequency of IC3701 chroma band-pass filter.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 D 11
3
4 3 0C
5 C 28
6 C 28
7 3 0C
8
9 D 11
10 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
5-44
VTR stop
No signal
CH1: Chroma signal terminal of S
VIDEO OUT jack (75 terminated)
CH2: Y signal terminal of S VIDEO
OUT jack (75 terminated)
Oscilloscope
C
28
A = 100mVp-p or less
B = 200mVp-p or more
Procedure
01 Set the data.
10 Set the data, and press PAUSE
button.
Check that the burst signal (B) is
output to the chroma signal
terminal of S VIDEO OUT 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, and press PAUSE
button.
00 Set the data.
H
H
Fig. 5-3-7.
B