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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