EasyManua.ls Logo

Sony BVU-950 - Page 40

Sony BVU-950
92 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
anyece
FOR
TRAINING
PURPOSES
ONLY
section
2.
DYNAMIC
TRACKING
~PRELIMINARY-
IC
214,
IC115
and
Q212:
SUBJECT
TO
CHANGE
1C214,
I1C215
and
Q212
alter-‘the
drum
advance
to
cope
with
INSTO.
(3)
Closed
Loop
and
DT
Drive
Amp
System:
The
head
height
voltage
for
channel
A
from
the
D/A
are
fed
to
the
IC303
LPF
and
the
inverter
amp
(gain
is
determined
at
RV303
and
R333).
Pins
8,
9,
and
10
of
IC303
constitute
a
notch
filter.
However,
when
the
lever
of
pin
10
of
IC305
is
LOW,
pins
5,
6
and
7
of
IC303
function
as
a
simple
buffer.
In
Fig.
2-13
notch
filter
f
characteristics
and
bimorph
f
characteristics
are
compared.
Fig.
2-13.
Output
A
Resonance
Point
Bimo
f
Chatacteristics
JN
Notch
Filter
Characteristics
Overall
Characteristics
Rlesonance
Point
Log
f
About
800°
Hz
230-19A:
Capstan
Current
IN
is
a
voltage
which
is
in
proportion
to
the
motor
drive
current.
This
mean
is
improve-
ment
of
the
acceleration/deceleration
of
the
capstan
motor
is
output
as
a
voltage.
The
voltage
input
for
forward
rotation
only
is
converted
at
pins
8,
9
and
10
of
IC302
into
a
positive
voltage
corresponding
to
the
acceleration/deceleration
of
the
capstan
motor.
230—10B,
11B:
The
voltages
obtained
from
the
strain
gauges
are
fed
to
the
buffer
IC306
and
then
amplified
by
the
differential
amplifier
IC301.
A
bias
voltage
for
SG
drift
adjustment
is
also
impressed.
4-24

Related product manuals