Advertisement
SVT-3000
SECTION 8
ELECTRICAL ADJUSTMENTS
PREPARATION
EQUIPMENT
@
Color TV monitor
e
NTSC
Color-bar
generator
(with
RF
and
LINE
OUTPUT)
Audio
signal generator
Oscilloscope (dual trace, frequency
response : 30MHz
or
more)
(Use
a
10:1
probe
unless
specified
otherwise.)
,
AV Tei Key ac{exe) 91)
Frequency
counter
AC
voltmeter
In/Output
probes
In making the adjustment, an alignment tape for VHS
(NTSC). If a model
is specified, be sure
to use a
tape of the model.
{Alignment
Tape (MH-1)] (H-7099-046-H)
(NTSC)
[ede [Fie [Video signal | Aus signa
e[ sr | iominees [site | ext —_|
f2[ se | sminwes [| oat _|
fs[_se | tominues | Covorbar |e |
fa] sr | amines [rove |__|
{Alignment
Tape (HiFi 400Hz)} (H-7099-153-H) (NTSC)
SET-UP
Because
the.
RF
input
signal
is
used
for
circuit
adjustments,
connect
the
color-bar
generator
to the
VIDEO
IN terminal
of the VCR. It is important
that
the video
output
signal satisfies
the items
shown in
Fig. 2-1. Connect the oscilloscope to the VIDEO
OUTPUT
terminal of the TB-1 BOARD
and terminate with a 75
Q load, and
then check
the video
output
signal.
@
The
amplitude
of
the
video
signal
should
be
approximately
0.3Vp-p.
e
The
amplitude
of the
video
signal
should
be
approximately
0.7Vp-p.
e@
While observing the oscilloscope or TV screen, make
fine-tuning
adjustments
so that
the
color
burst
amplitude
is approximately
0.3Vp-p.
@
Check
to be-sure
that
there
is no
spike
noise
in
the sync
part of the horizontal
sync
signal.
100% white
ORCA fons)
eae fa
Colour burst,
H_ sync signal
— 146 —
Advertisement
