Sony STR-VX4 - Page 33

SONY
STR-VX
Series
Circuit
Operation
STR-VX3,
-VX4
Power
Unlike
the
power
integrated
circuit
built
pe
on
one
chip,
the
voltage
amplifiers
and
Amplifier
current
amplifiers
are
separate.
This
.
isolates
the
magnetic
flux
and
provides
These
two
models
employ
two
kinds
of
low
noise
and
distortion.
The
DC
off-
integrated
circuits.
The
STK-3042II
set
voltage
is
adjustable
with
the
semi-
iS
a
voltage
amplifier
,
and
the
STK~2230
variable
resistors
RT701
and
RT751,
is
a
current
amplifier
(Figure
8).
Both
but
the
idling
current
is
fixed
inter-
integrated
circuits
contain
two
channels.
nally.
POWER BOARD
1€701(1/2)
C708 3.3p
R706
100 (1/2 Ww)
Fig.
8.
STR-VX3
Power
Amplifier
(Left
Channel).