Operation Manual

7
stereo
this beacon lights
up
automatically
to indicate
stereo
recept¡on.
On
the contrally if reception changes
from stereo to
mono,
the beacon does
not light. In
case
rnono reproducÌion of stereo signal is desired, set
the mode
selector switch
(9)
to mono
position.
MICROPHONE
LEVEL
CONTROL
(PULL
ON
MIC.
LEVEL}
The
input
level
of the microphone
jack(8
)
is
controlled
by
this
knob
Normally this switch should be left
pressed
in.
Pull the knob outwards
and
the crrcuit is
put
into opera-
tion. Then turn
it clockwise
so that an appropriate
level
can be obtained A word of warning: do
not
turn the main
amplifier
volume
up too loud
as annoying
feedback
"howl"
might take
place
between
your
speakers
and
microphone.
Experimenting will
help
you
find
the best levels
for
each of
these controls.
8.
MICROPHONE
JACK
(MIC.
R. L. CHANNEL)
lnput sensitiv¡ty
2mV; input
lmpedance 50 Kohms.
Both L-channel
and R-channel
have ìts
own
standardized
jacks,
and STEREO
SOUND N4
lXlNG of
mic input with
other
programme
sources
is
possible
when two rnicrophones
(stereo)
are
plugged
in These
jacks
accept
the
microphone
of
600 ohms
(low
impedance)
or 50
Kohms
(high
im-
pedance)
type
and the
rnput is amplif
ied and
controlled
by
the
|evel
control volume( 7
)
so
that
it can be
mixed to
both
channels respectivelY
9. MODE SELECTOR
SWITCH
This
switch allows
seleclion
of
sound
reproduction
modes
such as
Stereophonic,
Monaural
and Stereo-reverse
For
f rrrther details
refer to the
"Mode
Selection"
10. TAPE DUBBING SWITCH
The dubbing
lever switch
has three
positions:
in the
centre
position
"source",
which
is the
programme
source
as
selected
by
the
f
unction
selector. When
moved
to the
"up"
position(1
to 2) it will allow
the output
of
tape
recorder
"1"
to
go
to the
input of tape
recorder
"2"
for dubbing
(reprint).
Beprint
from
tape
recorder
"2"
Iorape
recorder
"1"
is allor¡¡ed
when
moved to the
"down"
position
(2to1).
11. TAPE
MONITOR SWITCH
When this switch
¡s lifted
up to the
"deck-1 (4
CH)"
position
playback
from
"TAPE
IVIONlIOR-1"
is
possible,
while at
the
"2"
position
"TAPE
N/ìONITOR
2" is
repro-
duced
The tape connector(32)
is also
f unctionable when
the switch
is set at
the
".1
"
position,
i.e,, it
f
unctions ìn
parallel
wìth
"TAPE
MONITOR
1".
In case of 3-head tape-
recorder
whìch has
playback
head
for
playback
in the
course
of
recording,
simultaneous
plavback
monitoring is
then
possible
while recording.
ln
this case this
receiver
receives
the
playback
signals
f
rom
either of TAPE
IVIONIIOR-1
,
TAPE IVIONITOR
2, or
tape connector while
feeding Ìhe
recording signals
to REC. OUT
1, REC. OUI
2
and
tape
connector.
Remember
that this switch
must
be
set
at
the corresponding
position
to which the tape
recorder
is connected.
Caution:
lf this
switch is at
the
"source"
position
no
playback
possible
from tape
recorder.
12. VOLUME CONTROL
(VOLUME}
A clockwise
turn
of this control increases
volume, while
a
counter-clockwise
turn decreases and
finally
cuts
out
volume.
Thìs
knob is of dual concentric construction and
permits
separate
control
of either the r¡ght or left channels;
the outer
axis
is
for
the
right channel, and the inner axis rs
for
lhe
left channel. This
control
usually controls both
channels
simultaneously,
but
you
may adjust
either channel
by
holding
one
axis
while turning
the other
The
click-
sÌoppers are
only
for
the
outer
axis,
i.e., the right channel
13.
LOUDNESS SWITCH
Because
loudspeakers
and
ears
generally
respond
less
to
extreme
high and low
(treble
and bass)
frequencies as
volume
levels are reduced,
the
LOUDNESS
switch
is
included to boost these
frequerrcies
and thereby
provide
tonal compensation.
Whether or not
you
use th¡s switch
depends
upon
the
levels at which
you generally
listen,
the
kind
of speakers
you
have, the room
acoustics
and a
number
of other variables.
Experimantation
is
the best
guide
to using the LOUDNESS switch
14.
MUTING
SWITCH
(MUTING)
Interstation
noise which
is
possible
when the
tuning
point
is drifted can be
eliminated by this
swìtch in FN/
reception
Use this to
cut off ¡nterstation
noise or other
impractically
weak
radio
signals.
Broadcasts
which
can
be
received
at
the
muting
on
position
are
practical
for
stereo reception.
lt
is
recommended
to keep th¡s switch
always
"on"
except
when
a
weak siqnals
is received
lf tuning of stereo
broadcasts
only is
desired,
push
this
switch
"on"
otherwise
leave
it normally
"off"
f
or
reception
of both Stereo
and
Monaural
FIV broadcasts. Also
when
this switch
is at
the
"on"
pos¡tion,
weak signals are com
pletely
eliminated
16. LINEAR
EOUALIZER
This is a
new
tone
control which
provides
a tonal
compensation
specifically
intended
for subtly augment¡ng
regular tone
controls.
w¡th
the control
in its mid-position,
flat frequency
response
is achieved.
When switched
to
either
of
2
"up
tilt"
positìons,
the
entire response curve
ìs
rotated so as
to linearly
increase
treble response while
simultaneously decreasing
bass response.
Conversely, selec-
lion of a
"down
tilt"
position
rotate the
response curve in
a clockwise
direction
and
provides
a
gradual
decrease of
treble and a simultaneous
increase
of
bass.
This equalizer
is
not released
even when
the Tone Controls
Switch
is
set at the
"tone
defeat"
positìon.
For
further details,
refer to the Operation
of
Linear
Equalizer
(Page
13).
17. BASS
LEVEL CONTROL
(BASS)
A clockwise turn
of the
control boosts the
bass response,
and a counter-clockwise
turn decreases
and cuts the bass.
This control
has
a
click
stopper
with 11
poìnts.
lt
yields
a
flat frequencV response
when set at
the centre of the
rota
tion angle.
You can choose a
turnover
(roll-off)
frequency
of 150H2 or
300H2 with the Selector Switch(18)
The Bass
Level
Control
is of dual
concentric
construction and
permits
separate
control of
either the
right or lefÌ channels:
the
outer axis
is
for
the
right channel,
and
the
inner axis
is
for
the
left channel.
This control
usually
controls
both
channels
simultaneously,
but
you
may
adjust
either channel
bv
holdinq one axis
whìle turning the
other The click-
stoppers
are only
for
the outer
axis, i.e.,
the right channel.
18.
BASS FREOUENCY
SELECTOR
SWITCH
Bass turn-over
(roll-off)
frequencies can be selected with
this
swìtch. When the desired
frequency
(150H2
or 300H2)
is set by
thìs
switch, tone
control starts
to function
at
the
selected
frequency.
At the
FLAT
position,
a
flat
frequency response is
obtained,
regardless of the
position
of
the
Bass Level
Control(17).
19.
TREBLE LEVEL
CONTROL
(TREBLE)
A clockwise turn of this knob boosts the treble
response,
while a counter-clockwise turn
decreases
the
treble This
control is of the same construct¡on as
that of the Bass
Level
Control, and
ìts operation corresponds
to that described
in
(11
)
20. TREBLE
FREOUENCY
SELECTOR SWITCH
Function-wise, it is the same as the Bass Frequency
Switch
described
in
(18)
Treble turn-over
(roll-off)
frequencies
can be selected at 3KHz or 6KHz.
21.
LOW CUT
FILTER
With this switch
low
frequency range can
be
cut off
at
the
rate
of 12
dBloct Reduction
at th¡s rate can be made
below
70H2. See the
f
urther
details in the
"Operation
of
Low Cut Filter"
22. HIGH CUT FILTER
Setting
of this switch reduces the amount
of high
frequen-
cies
above
I KNz ar
the rate of
1 2
dB/oct
See the
further
details
in
the
"Operation
of Treble Cut
Filter"
23. SPEAKER
SELECTOR
SWITCH
(SPEAKERS}
Thìs
receiver
offers
convenient
use of 3
pairs
of speaker
systems
You can
choose independent
or simultaneous
driving
of 1 or
2 systems
among
3
pairs
as
per
the
indication
on the
panel.
When the
knob is set at the
"B"
posìtion
B speaker
terminals(29)
start
to
function,
and
like-
wise at the
"A
+
B"
position
both
A and B
speaker
termìnals(29
)
si muitaneously
operate.
24. HEADPHONE
JACK
(STEREO
PHONE}
Connection
of stereophonic
headphone to this
jack
allows
pr¡vate
listening.
Output
signals are always
available
irre-
spective
of the
position
of speaker selector
switch(23)
For
use of
stereophonic
headphone,
however, it is recom-
mended to set
the speaker
switch at
the
"off"
position
25.
MAINS SWITCH
(POWER)
Repetition
of
pressing
this knob
ensures alternate switch-on
and off.
26. MAINS CORD
For operation of this
rece¡ver
the
mains
plug
attached
to
this cord
should be
connected
to the mains
power
supply
so u rce.
27. I\4AINS FUSE
(U-TYPE
AND
E-TYPE)
2
15.
STEREO
ONLY
SWITCH
ln the
mains
power
circuit is inserted 5A(U-TYPE)
'or
J