Nikko STA7070 User manual

am-fm-multiplex
stereo
receiver
model
sta
7O'7O
owner's
manual

SPECIFICATIONS
Se
SIGNAL
FREQUENCY
STATION
STEREO
STRENGTH
INDICATOR
FREQUENCY
INDICATOR
TUNING
METER
DIAL
INDICATOR
LIGHT
KNOB
STA- 7070 AM/FM STEREO AEGEIVER
STEREC
100 102 108
‘006 bi
‘i
uses sf
18.
SELECTOR:
MODE FM.
STERED MUTING
{.
TREBLE
BASS VOLUME -®- BALANCE
PLTER TAPE MON.
Low
aise
*
A
,
2
LOUONESS:
.
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PHONG?
* 7 ° *. em
PAaWwER SPEAKERS -
: PHONG?
AUX.
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A Ate
ore, 8
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PHONES % ; 5 Nag
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; F eS ads ee a =
Fee ‘ON q ce am ON,
aM .
VOLUME
P
R
PEAKER
HEADPHONE
BASS
TREBLE
TAPE
M
SWITCH
SYSTEM
JACK
CONTROL
CONTROL
MONITOR
|
CONTROL
Ce
ON
eH
ae
SELECTOR
LOW
HIGH
TAPE
SWITCH
(OUTER
cwitcH
SWITCH
SWITCH
FILTER
FILTER
MONITOR
TAPE
2
|
KNOB)
SWITCH
SWITCH
SWITCH
LOUDNESS
BALANCE
TAPE
1
SWITCH
=
CONTROL
(INNER
KNOB)
FM
TUNER
SECTION
AMPLIFIER
SECTION
Sensitivity
iHE
2.0nV
Music
Power
iHF
8
ohms
gow
Tone
Control
Bass
at
70
Hz
+1008
FM
Muting
Sensitivity
30uV
4
ohms
130W
Treble
at
10
KHz
#1048
Image
Rejection
at
98
MHz
80dB
RMS
Power
Rating
Single
CH.
Driven
Loudness
at
70
Hz
+908
IF
Rejection
at
98
MHz
90dB
8
ohms
40w/40w
at
10
KHz
+5,5d8
S/N
60dB
4
ohms
50W/50W
Filter
Low
Filter
at
70
Hz
-
BdB
Capture
Ratio
2.508
Both
CH.
Driven
High
Filter
at
10KHz
—7d8
Distortion
0.5%
8
ohms
34W+34W
Damping
Factor
8
ohms
30
Stereo
Separation
at
1000
Hz
38dB
4
ohms
43W+43W
Power
Line
Voltage/F
Carrier
Leak
19
KHz
&
38
KHz
50dB
Power
Response
+10B
0.5%
T.H.D.
10
Hz—40
KHz
ge/
en
a
Selectivity
£400
KHz
50dB
Frequency
Response
+1d8
Main
input
10
Hz—-50
KH2
iia
aceteeat
(or
220V/240V)/50/60
Hz
AM
Suppression
Ratio
AUX
Input
20
Hz~50
KHz
ption
aximum
210W
(FM
400
Hz
100%,
AM
1000
Hz
30%)
408
Distortion
Rated
Output
5%
A A
:
AG
Gila
oie
Boia
ay
cai
a
Working
Semiconductor
Devices
FM
Antenna
!mpedance
300
ohm/75
ohm
intermodulation
1W
Output
0.2%
i
:
Input
Sensitivity/Impedance
Transistor
47
Main
in
1100
mV/100K
chm
Diode
25
AM
TUNER
SECTION
iiss
1&2
ae
Dimension
va
455
m/m
18"
;
Sensitivity
S/N
=
20dB
150uV/m
ee
saan
oOR
ak
anes
370
m/m
eee
Image
Rejection
at
1000
KHz
45dB
pen
AD
iereaMine
he
Weight
es
ee
eee
Doe
as
S/N
PHONO
B5dR
as
Other
80dB

You
have
just
approached
an
exciting
new
dimension
in
music
listening
enjoyment.
With
your
purchase
of
the
Nikko
STA-7070
Stereo
Receiver,you
have
secured
a
measure
of
“Daily
Happiness”
for
yourself
and
your
family.
Nikko,
translated,
means
just
that...
“Daily
Happiness.”
It
is
the
job
of
this
fine
receiver
to
do
some
translating
for
you...
to
take
broadcast
electronic
impulses
and
transform
them
into
the
enveloping
experience
of
music.
To
deliver
soothing...
stimulating...
entertaining
listening
pleasure,
making
everyday
listening
an
enjoyable
event!
This
STA-7070
StereoReceiver
is
a
sophisticated
instrument
.
..
developed
by
some
of
the
world’s
most
creative,
technically
proficient
engineers.
This
Nikko
Receiver
is
the
product
ot
one
of
the
world’s
leading
electronic
component
manufacturers!
The
Nikko
STA
~
7070
is
designed
to
achieve
tne
ultimate
in
stereophonic
performance,
incorporating
many
of
the
latest
technological
advances:
Field Effect Transistors (FET)
Integrated Circuits (1.C.) for superior sensitivity.
Triple Circuit Breaker Protection for malfunction-free dependability.
This manual has been prepared to help you get the maximum performance from your
Nikko Receiver. The step-by-step “How To Operate” instructions, Function Explanations
and Connection Diagram will add to your knowledge .. .and enable you to “tune yourself
in”... to the many years of “Daily Happiness” that lie ahead.
PRINTED IN JAPAN

ie
EXPLANATION OF FRONT PANEL
®
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Acne pe ee subboice
POWER
SWITCH
(#12)
to
the
“DUBBING”
position,
TAPE
1
plays
and
TAPE
2
PHONO
1.
Turn
to
“PHONO
1”
when
playing
manual
or
automatic
Pressing
this
switch
will
permit
the
STA
-
7070
to
operate,
and
records
so
that
duplication
from
TAPE
1
to
TAPE
2
can
be
made.
record
player
equipped
with
magnetic
type
cartridge.
repressing
will
turn
this
receiver
to
“OFF”
9.
TAPE
MONITOR
SWITCH
TAPE
2
PHONO
2.
Turn
to
“PHONO
2”
when
playing
manual
or
automatic
SPEAKER
SYSTEM
SELECTOR
SWITCH
TAPE
DUBBING
SWITCH
TAPE
2-
TAPE
1.
record
player
equipped
with
magnetic
type
cartridge.
OFF:
Turn
to
“OFF”
when
using
headphones.
Push
down
this
switch
to
check
tape
recording
with
headphones,
DUBBING:
When
making
tape-to-tape
duplication,
perform
along
A:
Turn
to
“A”
only
when
operating
A
speaker
system.
(The
tape
recorder
or
deck
should
be
equipped
with
separate
recording
with
TAPE
MONITOR
SWITCH
1:
or
2
turned
on
A+B:
Turn
to
“A+B”
when
operating
A
and
B
speaker
system
and
playback
head.)
When
setting
FUNCTION
SELECTOR
SWITCH
;
as
desired.
simultaneously.
(#12)
to
the
“DUBBING”
position,
TAPE
2
plays
and
TAPE
1
13.
MODE
SWITCH
B:
Turn
to
““B”
when
operating
B
speaker
system.
records
so
that
duplication
from
TAPE
2
to
TAPE
1
can
be
made.
A
mode
switch
to
allow
you
to
select
Monophonic
or
Stereophonic
HEADPHONE
JACK
In
addition
to
tape
monitoring,
4-channel
adaptor
can
be
connected.
operation
to
fit
your
need.
7
Plug
stereo
headphone
cord
into
this
jack
for
private
or
monitoring
In
this
case,
the
switch
must
be
in
the
“ON”
position.
14.
FM
MUTING
SWITCH
|
listening
pleasure,
10.
LOUDNESS
SWITCH
Switch
“ON”
to
eliminate
unwanted
between
station
background
LOW
FILTER
SWITCH
Switch
in
“ON”
position
compensates
for
frequency
loss
at
low
noise.
i
Switch
“ON”
to
eliminate
low
frequency
rumble
noise
from
incoming
voiume
levels.
15.
TUNING
KNOB
;
signal.
11.
VOLUME
CONTROL
(OUTER
KNOB)
By
turning
this
knob,
you
select
the
desired
station
frequency.
a
HIGH
FILTER
SWITCH
For
low
volume,
turn
left;
for
high
volume,
turn
right.
16.
STEREO
INDICATOR
LIGHT
Switch
“ON
to
eliminate
high
frequency
scratch
noise
from
incoming
BALANCE
CONTROL
(Inner
knob):
Click-stops
at
the
top
center
It
lights
up,
to
visually
indicate
STEREO
FM
MULTIPLEX
broadcast
signal.
position.
reception.
BASS
CONTROL
12.
FUNCTION
SELECTOR
SWITCH.
17.
STATION
FREQUENCY
INDICATOR
Click
-
stops
in
5
steps
at
each
of
plus
and
minus
sides.
AUX:
Select
AUX.
1
or
AUX.
2
according
to
the
output
Points
out
station
frequency
received.
TREBLE
CONTROL
level
of
auxiliary
accessory
to
be
used.
Turn
to
18.
FREQUENCY
INDICATOR
DIAL
Click
-
stops
in
5
steps
at
each
of
plus
and
minus
sides.
“AUX”
when
using
other
auxiliary
audio
accessories
Clear
and
easy-to-read
slide
rule
dial
that
indicates
precise
STATION.
TAPE
MONITOR
SWITCH
TAPE
1
such
as
crystal
or
ceramic
type
cartridge,
tape
recorder
FREQUENCY
location.
:
TAPE
DUBBING
SWITCH
TAPE
1—
TAPE
2.
with
peramplifier,
television
output,
etc.
19.
SIGNAL
STRENGTH
METER
Push down this switch ta check tape recording with headphone.
(The
tape
recorder
or
deck
should
be
equipped
with
separate
recording
and playback: head.) When setting FUNCTION SELECTOR SWITCH
AM: Turn to “AM” when receiving AM broadcast.
FM: Turn to “FM” when receiving FM mono or multiplex
stereo broadcast.
When Turning Knob (#15) is turned to desired station, meter should
show maximum reading.

20.
21.
23.
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COMPOSITE OUT RIGHT
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TAPE 2 FEC /PB
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22)
GROUND TERMINAL
Earth ground connection for RECORD PLAYER.
INPUT-TERMINALS
AUX-1 HIGH LEVEL Should be selected according to the output
AUX—2 LOW LEVEL level of auxiliary accessory to be connected.
PHONO 1 Plug cables of manual or automatic record player
equipped with magnetic type cartridge into these jacks.
PHONO 2 Plug cables of manual or automatic record player
equipped with magnetic type cartridge into these jacks.
(Should select PHONO 1. or PHONO 2 for connection).
TAPE IN/OUT TERMINALS
TAPE 1. IN: Connect the output plug of the tape deck into
this jack for playback of the tape deck and
TAPE MONITOR SWITCH (#8) is in the on
position for monitoring the recording by the
tape deck.
QUT: Connect the input plug of the tape deck into
this jack.
TAPE 2. IN: Connect the output plug of the tape deck into
this jack for playback of the tape deck and
TAPE MONITOR SWITCH (#8) is in the on
position for monitoring the recording by the
tape deck.
OUT: Connect the input plug of the tape deck into
this jack.
TAPE REC/P.B (DIN TYPE CONNECTOR)
TAPE 1 This connector is an extra input and output terminal for
European type recorder.
TAPE
2
This
connector
is
an
extra
input
and
output
terminal
for
European type recorder.
(Connect 4 - channel adaptor with TAPE MONITOR
SWITCH (#9) turned on.)
24.
25.
26.
27.
28.
23)
MAIN IN/OUT SWITCH
CONNECT/SEPARATE—
Must
be
set
to
the
“SEPARATE”
position
only when connecting multi-amplifiers or
4-channel adaptor. (See #25.)
MAIN INPUT/PRE OUTPUT/FM 4CH OUT PUT TERMINAL
MAIN INPUT (R/L): Main amplifier input terminals; for use when
it becomes necessary to bypass the STA-
7070 pre-amplifier. This function is ac-
complished in conjunction with switch
(#24) located in the rear of the STA-7070
Provides output of pre-amplifier signals al
these terminals from the STA-7070 pre
amplifier.
FM
4CH
OUTPUT:
Connect
FM
broadcast
4-channel
adaptor.
SPEAKER TERMINALS (SPEAKER SYSTEM B)
A.
Connect
right-side
speaker
cables
to
terminals
“RIGHT”
and
PRE OUTPUT (R/L):
“GND”.
B.
Connect
left-side
speaker
cables
to
terminals
“LEFT”
and
“GND”.
C.
"GND"
markings
are
for
correct
phasing
of
both
speakers.
SPEAKER TERMINALS (SPEAKER SYSTEM A)
A.
Connect
right-side
speaker
cables
to
terminals
“RIGHT”
and
“GND”.
B.
Connect
left-side
speaker
cables
to
terminals
“LEFT”
and
“GND”.
C.
“GND”
markings
are
for
correct
phasing
of
both
speakers.
POWER SUPPLY CORD
Connect
this
cord
into
electrical
AC
receptacle.
AM/FM STEREO RECEIVER
MODEL STA- 7070
RATING AC $0/BOH2
& NIKKO ELECTRIC MFG CO.LTO.
MTIEKTON
INOPERATIVE, PUSH CRCOUIT [REAKER,
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UNSWITCHED
AC OUTLETS $0, 60H: 120V
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PRODUCT OF JAPAN
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RIGHT GND
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A
29.
30.
31.
32.
33.
34
35.
LEFT GND
Bz 2O«C«
ih
BC
AC OUTLET (Unswitched)
Accessory power outlet. AC always available when receiver is plugged
into AC receptacle and is nat controlled by the Main Power Switch
( #1).
Maximum capacity is 350 watts.
AC OUTLET (Switched)
This. outlet is connected to, and turned “ON” and “OFF” by the
Main Power Switch (#1).
Maximum capacity is 100 watts.
CIRCUIT BREAKER (Primary)
The primary circuit breaker protects the receiver from major damage
due to overload or short circuit.
CIRCUIT BREAKER (Secondary)
LEFT and RIGHT outputs are protected against overload with their
respective circuit Breaker provided. When the output is unavailable,
press the red reset buttons. When the circuit breakers reoperate
even after pressing the red buttons, the STA-7070 is in trouble.
Check the speaker output cords for short-circuit.
AM BAR ANTENNA
Adjust this bar for optimum AM broadcast reception with minimum
noises,
ANTENNA TERMINALS
FM — FM — GND AM
3002 7582
Connect balance-type antenna with an impedance of 300 ohms to
FM terminals and unbalance-type antenna of 75 ohms to FM and
GND terminals.
75Q COAXIAL CABLE
When the FM antenna is of 75-ohms coaxial cable type, the outer
earth conductor of the cable must be held with this holder and the
inner conductor connected to FM terminal.

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17.
18.
“19.
‘HOW TO OPERATE
.
POWER
SUPPLY
CORD
(#28)
should
be
connected
to
electrical
receptacle
after
ali
other
necessary
connections
have
been
made.
Make sure POWER SWITCH (#1) is in the “OFF” position.
Connect speaker to SYSTEM B (#26) or SYSTEM A (#27).
Connect
other
components
to
their
respective
connectors
on
the
rear
panel,
Turn FUNCTION SELECTOR SWITCH (#12) to desired position.
Set STEREO/MONO (MODE) SWITCH (#13) to desired mode. Pressing it down will turn mode to mono.
Set
VOLUME
CONTROL
(#11,
louter
knob)
to
zero
position
and
BALANCE
CONTROL
(#11,
Inner
knob),
BASS
CONTROL
(#6)
and
TREBLE
CONTROL (#7) to center position.
Set
TAPE
MONITOR
SWITCH
(#8
&
Q)
to
their
respective
level
positions.
Turn
LOUDNESS
SWITCH
(#
10),
FM
MUTING
SWITCH
(#
14),
LOW
FILTER
SWITCH
(#
4)
and
HIGH
FILTER
SWITCH
(#
5)
to
their
respective
LEVEL position..
Turn
SPEAKER
SYSTEM
SELECTOR
SWITCH
(#2)
to
desired
position.
After
checking
each
of
the
instructions
above,
connect
POWER
SUPPLY
CORD
(#28)
to
electrical
receptacle.
Press POWER SWITCH (#1) to turn on the STA7070.
Turn
VOLUME
CONTROL
(#11,
outer
knob)
to
adjust
speaker
output
levels.
Turn
BASS
CONTROL
(#6)
and
TREBLE
CONTROL
(#7)
to
adjust
low
and
high
frequencies
as
desired.
AM
RECEPTION:
Set
FUNCTION
SELECTOR
SWITCH
(#12)
to
“AM”
and
turn
TUNING
KNOB
(#
15)
until
you
catch
desired
station
with
maximum reading of SIGNAL STRENGTH METER (#19).
FM
MULTIPLEX
or
MONOPHONIC
RECEPTION:
Set
FUNCTION
SELECTOR
SWITCH
(#
12)
to
“FM”
and
turn
TUNING
KNOB
(#
15)
until
you
catch
desired
station
with
maximum
reading
of
SIGNAL
STRENGTH
METER
(#19).
MPX
STEREO
INDICATOR
LIGHT
(#16)
automatically
lights
up
when
FM
multiplex
broadcast
is
received.
HIGH
FILTER
SWITCH
(#5)
should
be
in
the
“ON”
position
to
eliminate
noise
of
FM
broadcast
reception,
record
player,
tape
recorder.
Refer
to“EXPLANATION”
for
operations
of
other
program
sources
(record
player,
tape
decks,
etc.)
NOTE:
Check
CIRCUIT
BREAKER
when
the
STA7070
does
not
work
even
if
all
the
necessary
connections
are
properly
made.
Push
the
reset
buttons
(#31
&
32,
RED)
of
the
circuit
breakers.

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