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HINTS ON USE
SPEAKER POLALITY
If the
phase (polarity, viz. +and-) of the right
and
left
speakers is
not
correct,
sounds
at the
center
of
the frequen
cy
ran
ge
become
weak.
You
will particularly
sense an attenuation of
bass.
To
m ake sure that
speaker polarity
is
all
right, play
a monaural record
on a
stereo record playe
r.
If
the
polarity
is
reversed
you
will have the
result
mentioned
above.
In such
a
case, reverse the
polarity
of either speaker.
(Connect the
-
lead
-
wire to
+.)
When both speakers
are
thu
s
made
to
agree in
polarity,
you
,
will
feel
as
if
the sound
comes
out
of
a
single speaker
placed midway
between th
e
right
and
left speakers.
FUSE
The
a
mplifier
does
riot
work when
the
fuse
is
bl own.
In
such
a
case,
disconnect
the
power
cord and
replace
the fu
se
on
the
back of
the
amplifi
er~
Use
a
3-ampere fuse
encased
in
a glass
tube.
Never
risk the danger
of
usi
ng
fine
wire
or
a
fu
se
of a
larger
ca pacity
as a substitute.
If
the fuse has burnt
out
beca use
the
amplifier
is
out
of
order, locate
the
troubl
e
and
repair it
before
replacin
g
the fuse.
The fuse
,
blows
if
you
use
an
AC
plug
receptacle
larger than
the'
specified
·capacity
(SO
VA for
two)_
HEAT GENERATED BY AMPLI·
FIER
The top of the amplifier
case
becomes considerably
hot after many hours
of continuous
operation_
But this should not worry
you
because air
vents
are provided on the top
and
back of the case.
If
you
place something
on
the
amplifier or
put
it in a closed box,
or
keep its front panel facing
Fig.
1
up, it
might go
out
of order.
CONNECTIONS
When you
con nect you
r amplifi
er to a tape
recorder
or
tuner,
be
sure
to
use
a
n adequately
thick shield
ed
wires. If
yo
u
use
untwisted vinyl
cord
like
those
used
for lights,
you
will suffer
from
hum.
Furthermore,
do not ,use a
wire
longer
th
an 2
m
eters
(about
6.5
ft.), because the
lon
ger
the
connecting
wire
is,
the grea
ter th
e a
ttenuation
of
treble
becomes.
For
con
nection
to a
tuner
or
FM
adaptor, use a
wire 1 to 1.5
meters
(about
3.3
to
4.S ft.)
long.
When
yo
u
use the amplifier
for
monaural
reproduction, it
is eas
ier
for operation
to
use
th
e upper
R terminal
for
connection.
Be
sure
to set
the
"MODE"
switch
to
the
connected
channel.
HUM AND HOWLING
When
you
play
a
reco
rd
or
tape,
you
may
some-
times hear
unpleasant
humming
or
how
ling.
This
,does not
mean
th
at
your
amplifi
er
is
defecti
ve.
In most
cases,
hummi
ng
or
howlin
g
is a
result
of these cau
ses:
If
you place
a record
player
0
11
or
near
th
e
speaker box,
the
vibrations
of the
speaker
cabinet
caused by the
sound
waves from
th
e
speaker are
transmitted
to
th
e
player and cause
h owling.
To
prevent
this,
keep
the
record
player away
from
the
speaker
cabi net or
put
a
thick cushion
be-
tween the
player and the cabinet.
A low, buzzing
sound
wjll
also
be produced if
you
do not use shielded
wires
for
connection.
If this
is not the
cause, ex
am ine th
e
connections closely.
Make
sure
that the
earth and
live
end~
are not
reversed
so
that
the
motor
a
nd
arm
a
re inade-
quately
grounded.
-
16
-
CONNECT
PERLY
LEADWIRES
Fig
. 2
PRO·
Connect lead
wires properly
to
the speaker
and
other input
a
nd
output
terminals.
If
co
nnections
are loose
or
touch
other parts,
yo
ur amplifier
will
not
work properly.
Moreover, it may produce
noi
se.
If
you
use
your amplifier
in such
a way
for
a
long
time,
it
may eve
ntu all
y
break down.
Finally,
read the
instructions
for your
tuner
or
tape recorder
carefully
before
you
co
nnect it to
your amplifier.
LEVEL METER SWITCH
This
is
used
to select
the most
suitable meter
sensitivity
from
the three
ranges
of
5,
10
and
25
wa
tts.
The variable
sensitivity is
intended to
mak
e
it
eas
ier
to
watch needle
movement.
high:
up
to
5 watts
medium:
up to 10
watts
lo\\'
:
up
to
25
watts (maximum output)
Choose
the
appropriate
range
according
to
volume
level you
want.
AC OUTLET
The AC
OlJtlets
on the
back
panel
are connected
or
disconnected by the power switch
on
the front
panel.
The total capacity is
SOV
A-30VA and
another 50VA-
Be sure to lise them within
the limit.
WHERE TO BE PLACED
The amplifier should be installed to the place as
given below:
1.
Easy to ground;
2.
Floor not vibrated;
3.
Not wet
and
dusty;
4.
Not exposed
to the
sun;
5.
Well ventilated.
-
16
-
Fig.
3
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