General Adjustment; Video Terminal Output Level Adjudtment; (Jc-21 Board) - Sony DSR-25 Service Manual

DSR-25

3-4-2. General Adjustment

1. Video Terminal Output Level Adjustment

(JC-21 Board)

Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Switch setting:
Set the NTSC/PAL switch on the rear panel to "NTSC" (NTSC
mode) and perform this adjustment. Only checking is performed
in "PAL" mode.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 0C, set data: 01, and press the PAUSE
button of the adjustment remote commander.
3) Select page: C, address: 25, change the data and adjust the Y
level (A) to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Change the data on page: C, addresses: 26, 27 and adjust so
that each luminance point positions at the
vectorscope.
6) Press the PAUSE button of the adjustment remote commander.
7) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
8) Select page: 0, address: 01, and set data: 00.
Y level
White
A
E-E
Arbitrary
VIDEO OUTPUT terminal
(75 Ω terminated)
Vectorscope (NTSC: 0% setup
mode)
Oscilloscope
C
25 (Y level)
26, 27 (C level)
Y level: A = 822 ± 20 mVp-p
(NTSC)
A = 825 ± 50 mVp-p (PAL)
C level: From the center of
on the vectorscope, each
luminance point must
satisfy the following:
Level: ± 5%
Phase: ± 3º
mark on the
H
mark
C level
For NTSC mode
Y
Burst
For PAL mode
Y
L
–Y
L
Fig. 5-3-8
5-56
R
L
G
C
Y
R
–C
Y
–G
Burst
–Burst
G
C
–R
Y
M
G
B
M
G
–B
B
–M
G