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350ZJ21(N)
—
201
1
Fig. 2-1-3
I
KWO16
I
Lead wires of connector _
~
12-pin connector
ector
Video pre-
nector
Relay jig (
Syli
L~&~
),
,
Fig. 2-1-4
2-1-3. SET-UP
Because the RF input signal is used for circuit adjustments,
. Check to be sure that there is no spike noise in
connect the colour-bar generator to the ANT IN terminal of
part of the horizontal sync signal.
the sync
the VCR. The RF input signal is processed by the tuner and
IF circuit. It is improtant that the video output signal of the IF
[
wowcm
circuit satisfies the items shown in Fig. 2-1-5. Connect the
white>
,
oscilloscope to the VIDEO OUTPUT terminal of the video
circuit and terminate with a 75!2 load, and then check the
'"
T
video output signal.
-[
!
Ir
[ ~ ;', ) 4 b
0.7 Vp-p
.
The amplitude
of the sync signal should be approxi-
1
I
mately 0.3 Vp-p.
0.3
Vp-p 4
0
The amplitude
of the video signal should be approxi-
4
_f_ ~
>olour
burst
0.3 Vp-p
mately 0.7 Vp-p.
-L
o While observing the oscilloscope or TV screen, make
H svnc signal
fine-tuning
adjustments
so that
the
colour
burst
Fig. 2-1-5
amplitude is approximately
0.3 Vp-p.
–3—
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