Video System Adjustments; 27 Mhz Origin Oscillation Adjustment; (Vc-273 Board); S Video Out Y Level Adjustment (Vc-273 Board) - Sony DCR-TRV140 Service Manual

DCR-TRV140/TRV140E/TRV140M
3-4.

VIDEO SYSTEM ADJUSTMENTS

Adjusting Procedure:

1. 27 MHz origin oscillation adjustment

2. S VIDEO OUT Y Level Adjustment
3. S VIDEO OUT chroma level adjustment
4. VIDEO OUT Y, chroma level check
1. 27 MHz Origin Oscillation Adjustment

(VC-273 board)

Set the oscillation frequency of X1501.
If deviated, the synchronization will be disrupted and the color
will become inconsistent.
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 F 4D
3 F 4D
4 0 01
VC-273 BOARD
IC1502
16
CAMERA
Arbitrary
Pin qh of IC1502
Frequency counter
F
4D
f=13500000 ± 68 Hz
Procedure
01
Change the data and set the
clock frequency (f) to the
specified value.
Press PAUSE button.
00
Fig. 5-3-6

2. S VIDEO OUT Y Level Adjustment (VC-273 board)

Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 D 10
3 3 0C
4 C 25
5 C 25
6 3 0C
7 D 10
8 0 01
5-46
CAMERA
Arbitrary
Y signal terminal of S VIDEO OUT
jack (75 Ω terminated)
Oscilloscope
C
25
A = 1000 ± 20 mV
Procedure
01
01 Press PAUSE button.
02 Press PAUSE button.
Change the data and set the
voltage (A) to the specified
value.
Press PAUSE button.
00 Press PAUSE button.
00 Press PAUSE button.
00
H
A: Y signal level
Fig. 5-3-7
A