Sony SLV-E170EE - Page 50

SLV-E170EE/E170EG/E320EE/E470EE/E470EG
SECTION 7
ADJUSTMENTS
7-1
MECHANICAL
ADJUSTMENTS
For
the
mechanical
adjustments,
please
refer
to
the
“VHS
MECHANICAL
ADJUSTMENT
MANUAL
IV
(H
MECHANISM)”
(9-973-623-11).
7-2.
ELECTRICAL
ADJUSTMENTS
See
the
adjusting
part
location
diagram
from
on
page
7-6
for
the
adjustment.
2-1.
PREPARATION
BEFORE
ADJUSTMENT
2-1-1. Equipment Required
The
measuring
instruments
used
for
this
alignment
include:
1) Monitor TV
2)
Oscilloscope,
dual-trace,
bandwidth
of
30MHz
or
more,
with
delay
mode
(A
probe
10:1
should
be
used
unless
otherwise
specified.)
Frequency counter
Pattern generator
Digital voltmeter
Audio generator
Audio level meter
Audio distortion meter
Audio attenuator
Alignment tapes
KRV-51P Part No. : 8-192-605-36
3)
4)
5)
6)
7)
8)
9)
10)
2-1-2. Equipment Connection
Unless
otherwise
specified,
connect
and
adjust
the
measuring
instruments as shown in the following diagram.
VIDEO LINE IN
Monitor TV
Pattern generator
Video output
VIDEO LINE OUT
(75Q)
Fig. 7-2-1.
2-1-3. Input Signal Check
Video
signal
produced
by
a
pattern
generator
is
used
as
an
adjustment
signal
to
perform
electrical
alignment
for
this
unit.
This
video
signal
must satisfy the specification.
Unless
otherwise
specified,
place
the
switches
and
controls
of
this
unit
in
the
following
positions:
.
SWIC
A.deescvcsscexecadintstedesiesae
radia
Connect
an
oscilloscope
to
the
Video
Input
terminal.
Check
that
the
synchronizing
signal
of
the
Y
signal
has
an
amplitude
of
approximately
0.7V
and
that
the
burst
signal
has
an
amplitude
of
approximately
0.3V
and
its
waveform
is
flat.
And
check
that
the
level
ratio
of
burst
signal
to
“red”
signal
is
0.30
:
0.66.
The
video
signal
(color
bar)
used
for
electrical
aligning
this
unit
is
shown
in
Fig.
7-2-2.
White (Approx. 75%)
Approx. 0.7 V
| t Approx.
| 0.3V
Burst signal
(Should be flat.)
Approx. 0.3 V
. 2
Horizontal sync signal
Fig. 7-2-2. Color Bar Signals of Pattern Generator
2-1-4. Alignment Tape
¢ Contents of KRV-51P
Mode | Period
PY se [Eis | cor
seie | aoe
ae ee | come
Video signal