MAINTENANCE
Transistor
s
differ
fundamentally
from
radi
o
v
ac
uum
t
u
bes
and
require
special
attention
to ensure their
full
performance
cap
a
bil
i
tie
s.
Given proper
c
a
re
,
t
ra
nsistors
will
provide years of practically
tr
oubl
e-
f
r
ee pe
r
form
a
n
ce.
(
a
)
Avoid
loc
a
tions
subject
to direct
sunlight.
(
b)
Avoid
hi
g
h or low t
e
mperatu
r
e
e
x
tr
e
mes
.
(c
)
Keep t
h
e rec
eiv
e
r
a
w
a
y from h
e
a
t
radi
a
tin
g
s
our
ces
.
The newly developed
protection
circuit
is completely
eff
e
ct
i
ve
a
n
d
prevents damage which m
a
y be caused by short-circuiting
at the speak
er
outputs or the electrical
overloading
point
.
When
a
short-circuit
oc
c
ur
s,
this
prot
e
ction
circuit
will
function
automatically
to protect
t
he pow
er
output
tr
a
nsistors
.
Th
e
program
sound will
be heard off an
d
o
n
int
e
r
-
m
i
ttently
about every fou
r
seconds
.
If this occurs
,
there
i
s
n
o
fear of
da
mage to
t
he
power output
trans
i
s
t
ors
.
Just
swi
t
ch
off
t
h
e
supp
l
y
line a
nd
c
h
ec
k th
e spea
k
e
r
connectio
n
s
.
ACOUSTIC FEEDBACK
O
c
c
a
sionally
a
disturbing
howling
sound c
a
used by acousti
c
f
e
ed
-
back
,
m
a
y be he
ar
d.
This
i
s
g
enerally
caused by the relativ
e
pos
i
t
i
o
ns
of the turn
ta
bl
e
a
nd
s
pe
a
ker enclosures.
The sound pressure
radia
t
ed
from
·
the
speaker
box su
r
rounds
and
vibrate
s
t
he
turntable.
Th
is
vib
r
ation
is pick
e
d
up by the
c
a
r
tridge
,
sent to the amplifie
r
a
s
an
electrical
signal
,
and
r
etu
r
ned
to the speaker
.
This
a
gain c
a
us
e
s
t
he
s
peakers
to
r
adi
a
te
vibr
a
tion
which
induces
symp
a
thetic
vibration
s
i
n
t
he
t
urntable
a
nd cartridge
.
Sympathetic
vibrations
are re
i
nforced
wit
h
e
a
ch
r
epeatin
g
cycl
e
and result
in an undesi
r
able
sound called
os
ci
l
-
·
l
ation
or
"
howlin
g"
.
To p
r
event
it
,
keep your
turntable
away fro
m
your spe
a
ker
s
.
Also
m
ounting
your turntable
on
s
ho
c
k
-a
bsorbin
g
pads
may hel
p.
Do no
t
us
e
alcohol
,
thinner
or gasoline wh
e
n
cl
e
a
nin
g
th
e
r
eceiver
s
urf
ace.
U
s
e
a
silicon
cloth or a soft
d
ry cloth
.
The KR
-
6340 operates on 1
1
0
-
12
0 volt AC or
22
0
- 2
40 volt A
C.
The AC Voltage Selecto
r
Switch on the r
e
ar
p
an
e
l i
s s
et to
t
he volt
age
that
prevails
in the area to which th
e
r
e
c
e
iv
e
rs
a
re shipped
.
Befo
re
operating
this
receive
r,
mak
e
sure th
a
t th
e
position
of the AC Volt
age
S
e
lector Switch matche
s
your lin
e
volt
a
g
e
.
If n
o
t
,
it m
u
st b
e c
h
anged
to the proper setti n
g
.
To change
,
first
tu
r
n
t
h
e
rece
iv
er
o
ff
,
t
hen
r
emov
e
th
e
stoppe
r
·
p
lat
e a
nd sli
d
e the AC Vol
t
a
ge
S
w
i
tch to
th
e
o
p
p
os
i
te
s
ide
.
T
h
e
n
re
-
a
tt
a
ch
t
he
s
topper pl
a
te t
o
th
e o
th
er s
i
de
.
When th
e
position
of th
e
A
C
V
o
l
tage Se
lector
Swi
t
ch
is ch
a
nge
d,
it
i
s
a
lso necessary to ch
a
n
ge
th
e
pow
e
r fu
se
.
F
or
1
10
-
120 volt ope
ra
-
tion
a
4 ampere fuse shoul
d be
u
sed.
F
or 22
0
- 2
40 volt op
e
r
a
tion
a 2
a
mpere fuse should be u
s
e
d.
I
f t
he
p
o
w
er fus
e
f
a
il
s
,
re
m
o
v
e
b
l
o
wn fu
se a
n
d rep
l
ace
w
ith the
s
a
me type fuse of the
sa
m
e ca
p
ac
i
ty.
A
ny tro
ubl
e
in
t
h
e po
w
e
r
s
u
ppl
y
c
i
r
cuit
will
c
ause the fu
s
e
t
o b
l
o
w
a
g
a
in
.
In
such
a
case, consu
l
t
a
q
u
a
Iifi
ed s
e
r
v
ice
m
a
n
.
When you
r
epl
ace
t
he
fu
se
,
tur
n
th
e f
u
se
hold
er
in th
e d
i
re
ct
i
o
n
of the
a
rrow usin
g
a Philli
ps
sc
r
e
w driv
er.
In
s
ome districts
,
the se
t
will
be provided
with
a
n
o
the
r
t
y
pe o
f
fuse
h
o
l
de
r
,
w
hich
a
llows
e
asy
r
epla
c
ement
of th
e
f
use w
i
t
hout
us
in
g
th
e
Philli
ps
sc
r
e
w driv
er
.
1
.
Alw
a
ys disconnect
powe
r
sup
p
ly
before re
p
lac
i
n
g
a
fu
se
.
2.
Ou
r
warranty
do
e
s
n
o
t
cover
da
m
ag
e
c
a
us
ed
by
exces
sive
li
n
e
volta
g
e due
t
o imp
rope
r
settin
g
of th
e
AC Volt
age
S
e
le
cto
r
Swi
t
c
h
.
II 0-120V
"
~
!
220 -240V
II 0
-
1
2
0V"
~ 22
0
- 2
40
V
(
ACI20V
"
~ AC220V
)
(
A
C
1
2
0V
•• ~ A
C22
0V
)
@
~
@
S
to
pp
er
pl
ate
I
.
R
e
mov
e
screw
an
d
sto
pp
e
r
plat
e.
2
.
Switch
l
e
v
e
r
to o
p
pos
ite
s
ide.
3
.
L
o
c
k
l
ever
b
y
attac
hin
g st
opp
e
r
plate to o
ppo
site si
d
e sc
r
ew
.
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