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PRECAUTIONS
1.
GENERAL
BE
SURE
TO
USE
YOUR A.C.
POWER SOURCE
Your A.C.
power
is
marked on
the
rear panel
of
this
unit.
Connection
to
any
other
power
source may
cause damage
to
this unit
and/or
severe
electrical
shock.
DO NOT PLUG IN OR
UNPLUG
THE
POWER
CORD
WITH WET HANDS
l-here is
a great danger
of
severe
electrical shock
if
the power
cord
is plugged
in
or
unplugged
with
wet
hands.
Do not attempt
to
unplug the cord
from
an
A.C. outlet by
pulling
the cord. Firmly
grasp the
plug
to
remove
it
f
rom
the
A
C.
outlet.
DO NOT ALLOW
WATER
OR
ANY
FOREIGN
MATTER TO GET INSIDE THIS
UNIT
Should
water
or a
metallic object
accidentally fall
into this unit,
immediately
disconnect
the
power
cord and consult
your
authorized
service dealer.
HANDLE
THE
POWER CORD
WITH
CARE
Do
not
bend sharply or
twist
the
power
cord.
lf
the
insulation
becomes damaged,
the
conductor
breaks,
or
poor
contacts
occur,
request
service
from
your
authorized
service
dealer.
Continued
use
under
these
conditions,
may
cause
f
ire
or electrical
shock.
DO
NOT TOUCH
THE
INSIDE OF THIS
UNIT
There
are
high
voltages inside
this unit.
Never
re-
move the
top or
bottom
cover.
All
inspections
and
repair including fuse
replacement,
should
be
carried
out
by your authorized
service dealer.
DISCONNECT
THE
POWER
CORD
AT
THE
FIRST
SIGN
OF TROUBLE
At
the
f
irst
sign
of
unusual noise,
odor,
or
malfunc-
tion,
disconnect
the
power cord and
consult your
authorized
service
dealer.
Continued
use
under
these
conditions,
may
increase damage
or
cause
additional
problems.
2. LOCATION
AVOID
PLACEMENT
IN
DIRECT
SUNLIGHT.
NEAR
AIR
CONDITIONER
ETC.
This unit
can
become unstable
if
operated
in
ex-
tremely
high
or
low
temperatures.
Place
it
in
a
well
ventilated
area
for
proper
heat dissipation. Avoid
placement
in direct
sunlight,
near
air
corditioners,
poorly
ventilated
areas
or
in
areas
of
excess
humidi-
ty
or dust. Do not block
the
ventilation
holes.
3. CONNECTIONS
BE
SURE
TO TURN
OFF
THE
POWER BEFORE
MAKING
CONNECTIONS
This
is
to
prevent
damage
to
the
speakers
from
the
poppinq
noise
which
occurs
when
plugging
and
unplugging
cords.
USE EXTREME
CARE
IN
MAKING THE
COR-
RECT CONNECTIONS
lf
you
reverse
the
R (right) and
L (left)
leads,
you
will
reverse
the
stereo
location
of
R
and
L
channels.
MAKE
CONNECTIONS
SECURE
LY
lf
any
of
the
plugs
should
become loose
or
discon-
nected,
a hum may
develop.
lf
this
is
not
corrected,
deterioration
of
sound
quality
and
possible
damage
to
the
speakers
may result.
USE
ONLY
SHIELDED CORD FOR
THE
LEADS
Use
only
shielded
cords
for
interconnecting
com-
ponents.
Do
not
use
cords
longer
than
2m
(6').
Ex
cessive
lead lengths can deteriorate high
frequency
response
and are subject
to
interference
that
can
result in
hum
or
noise.
DO
NOT
SHORT
THE
OUTPUT
OF THE
POWEB
AMPLIFIER
This
unit
incorporates
a
protection
circuit
so that
power
transistors
will
be
protected
in
case
of
a
short.
Shorts
can
reduce
the life of
the
translstors
and
should
be
avoided.
USE
SPEAKERS
WITH NOMINAL
IMPEDANCE
OF
4.16
OHMS
lf
you
use speakers
with a
load
impedance
of
less
than
4
ohms,
the protection
circuit
may
be
triggered
and the amplif ier
output
muted.
WHEN CONTROLLING
TWO
PAIRS OF
SPEAK.
ERS
SELECTION
FROM
THE
COMPANION
PREAMPLIFIER,
ENSURE
THAT THE
COM
BINED
IMPEDANCE (BOTH PAIRS
OF
SPEAK
ERS
OPERATING}
IS
4
OHMS
OR ABOVE
lf
the
combined impedance
is below
4
ohms,
the
load
impedance
detector
circuit
may
operate
and
rnute
the
power amplif
ier
output.
The
combined
impedance
is
determined
with
the
following
formula.
coMB|NED
TMPEDANCE
=
*+3
(oHMs)
u871 8003H88
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