Technics SU-V4 Service Manual

-m@
BLOCK
DIAGRAM
™
VARIABLE
RESISTORS
@
:
;
2),
5
S
o
@
Alteration
of
resistance
values
according
to
the
rotational
angles
of
variable
resistors
x
Wg
ee
ace
ee
pe
a
ey
oe
om)
.
er
:
‘
8
oS
3
e
|
Moideies-
Waneedanee
|
Alteration
characteristics
as
shown
below
are
often
used
for
sets.
All
are
intended
to
keep
the
frequency
response
of
—_
0
bd
.
{
.
.
.
2
“e
.
o-
°
.
oe
oH
|
5S
i.
pA
a
Son
ce
eeu
ne
aoe
:
as
|
_
the
set
at
optimum
levels,
and
are
used
according
to
the
types
of
circuits.
For
example,
characteristic
(B)
is
used
for
Cc:
7
.
.
«
x
*
2
ot.
:
:
o-O=
sound
volume
adjustment;
(A)
and
(C)
are
for
bass
and
treble
sound
quality
adjustment;
(G)
is
for
medium
sound
3
el
§
:
quality
adjustment;
and
(BH)
is
for
the
adjustment
of
sound
balance
between
the
right
and
left.
as
bm
bd
In
the
case
of
this
unit,
variable
resistor
with
characteristic
(C)
which
is
short-circuited
between
its
ends
at
rotational
\
OD
;
oO.
.
:
:
angle
of
150°
(center)
is
used
for
bass
adjustment.
Also,
variable
resistor
with
characteristic
(C)
whose
resistance
is
zero
=
wo
m
.
°
:
:
ene
:
; ‘ .
@
SG
fe)
Oo
at
rotational
angle
of
150°
(center)
is
used
for
treble
adjustment.
And
characteristic
(BH)
in
which
two
variable
resis-
eye
Cc
a
Cc
e
-
.
.
*
.
ne
F
;
.
.
.
.
ifier
2
52s
¢
e
vi
tors
are
interlocked
with
characteristics
(C)
and
(A)
combined
is
used
for
the
adjustment
of
sound
level
balance.
DE
an
|
-
Av
&
ee
IS
2
ek
°
st
lim
©
Ss
1 Uv
?
26
5
x=
he
S|
Sos
S
e
Mm)
>So
s
1S)
YWOna
4
=
:
E
3
3
8
©
$
$
|
o
@
®
©
gs
~
~
=
So
o
q)
®
®
=
oc
300°
or
300°
oc
oc
a
1
s
Rotational
angle
Rotational
angle
Rotational
angle
Rotational
angle
]
¢
o£
=
‘Che.
’
“
cad
|
F:
o
©
s
©
‘
E
|
ar
Characteristic
(B)
Characteristic
(C)
Characteristic
(A)
Characteristic
(G)
3
~
—
;
,
”
ra
=
2
=
o
:
o.
|
N
S)
>
;
ss
3
VR1
is
inter
locked
|
6)
_
Q
=
.
with VR2
|
5
£0
&
=
_
eee
|.
|
=
(20uD}0g)
2
®
.
$s
!
=
(@WN|OA)
b
S
®
®
|
<=
|
=
lOZYUA
7
Q
VRI
2
c
|
l
br
be
ie
=
5
c
£
)
ies
.
te
5
:
:
F
¢
4
252
bw
:
F3
3
-
é
|
.
Jeet
MRT
E
:
oe
O
e
O
«
a9)
=
peepee
:
;
=
*
pee
So
be
®
8
e
=
9aHOOO
Rotational
angle
Rotational
angle
Rotational
angle
|
_J
2
as
—
.
°
.
6
'
1
e
i
°
Characteristic
(BH)
Characteristic
(C):
Characteristic
(C):
|
2
short-circuited
at
center
opened
at
center
|
”
.
:
5
Reso
|
E22g88
9
5
:
1
O@OODO
.
2
=
|
8
a.
|
|
8
;
.
Ola
a
ee
3
4
tput
+
©
@
9
Oo
&
a
cr
©
S
!
3
=
Ig
:
|
e
or)
cc
=
z
A!
a
ic
ae
QO
|
&
o
A
1@6o
x -
4
—
~y
.
ca
.
=
+
2
g
>
w
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fe
b
qi 2
O
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o a
r
74
>
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=
45
>
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Technics SU-V4 Specifications

General

Brand	Technics
Model	SU-V4
Category	Amplifier
Language	English