Sony RM-E700 - Adjustments

SECTION 7
ELECTRICAL ADJUSTMENTS
During
the
Adjustment,
See
the
Parts
location
diagram
relevant to the adjustment on page 107.
The following measuring instruments are needed in electrical
adjustment.
[Using instruments]
1) Monitor TV
2) Oscilloscope dual-trace, Band width more than 1OMHz
with
delay
mode
(Use
a
probe
of
10:
1,
unless
otherwise
specified.)
3) Frequency counter
4) PAL pattern generator with video output terminal and
Y/C separate output terminal
5) Digital voltmeter
6) PAL vectorscope
[Connection]
Unless otherwise specified, connect the measuring instru-
ments as shown in the following diagram.
Vectorscope
Pattern generator
INPUT V
©
Video out
RM-E700
Fig. 7-7.
(Color ber signal]
Video signals output by a pattern generator are used as
adjustment signals when making the electrical adjustments,
and these Video output signals should be within the required
Standard. Connect an oscilloscope CNJ3 (INPUT V) on the
VI1-60 board. Check that the amplitudes of Video signal
SYNC signals, picture portions, and burst signals are flat at
approximatery 0.3, 0.7, and 0.3V, respectively, and that the
level ratio of burst signal and “red” signal is 0.30: 0.66. Fig.
7-2. shows Video signals (color bars) used in making the
electrical adjustment.
Fa
Burst
Signal
Should
be
Flat
Approx.
0.7V
(Should
at)
er ‘|
Horizontal SYNC Signal
White (Approx. 100%)
Red
Fig. 7-2.
[Specified input/output level and impedance]
Video input Phono jack (1)
1Vp-p, 75ohms, unbalanced, sync negative
4-pin mini-DIN (1)
Luminance signal: 1Vp-p, 75ohms, un-
balanced, sync negative
Chrominance signal: 0.300Vp-p 75ohms,
unbelanced
S Video input
Phono jack (1)
1Vp-p, 75ohms, unbalanced, sync negative
4-pin mini-DIN (1)
Luminance signal: 1Vp-p, 75ohms,_ un-
balanced, sync negative
Chrominance signal: 0.300Vp-p 75ohms,
unbelanced
Video output
S Video output
[Adjusting mode]
Unless otherwise specified, E-E mode.
—102—