Kenwood KR-770 User manual
AM-FM
STEREO
RECEIVER
KR-770
INSTRUCTION
MANUAL
CONTENTS
CONTROLS. INDICATORS
AND
CONNECTORS
SAFETY PRECAUTIONS....
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SYSTEM CONNECTION
DIAGRAM
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SYSTEM
CONNECTIONS
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OPERATING INSTRUCTIONS
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IN CASE OF DIFFICULTY .
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SPECIFICATIONS.....
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MEMO
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FOR
YOUR
RECORDS
2
4
4
5
7
9
10
11
Record the serial number. found on the
back
of
the
unit. in the spaces designated on the
warranty
card. and in
the space provided
below
. Refer
to
the model and serial
numbers whenever you call
upon
your
Kenwood dealer
for
information
or
service on
this
product.
Model
KR-770
Serial
number
____
_____
_
UNPACKING
Unpack the
unit
carefully and make sure
that
all
accessories and cables are
put
aside so
they
will
not
be lost.
Examine the
unit
for
any possibility
of
shipping
damage.
If
your
unit
is
damaged
or fails
to
operate,
notify
your dealer
immediately
.
If
your
unit
was
shipped
to
you di-
rectly,
notify
the shipping
company
without
delay. Only the
consignee (the person or
company
receiving the
unit)
can file
a claim against the carrier
for
shipping
damage.
We
recommend
that
you retain the original
carton
and
packing materials
for
use should you transport
or
ship
the
unit in the
future
.
INSTALLATION
PRECAUTIONS
(a)
Avoid
locations
subject
to
direct
sunlight.
(b) Avoid high
or
low
temperature
extremes.
(c)
Keep the
unit
away
from
heat radiating sources.
(d)
Choose a
location
that
is relatively free
of
vibration
or
excessive dust.
(e)
Make sure
power
is
off
before making any system con-
nections.
WARNING:
TO PREVENT FIRE
OR
SHOCK HAZARD,
DO NOT EXPOSE THIS APPLIANCE TO
RAIN
OR
MOISTURE.
,·-
$KENVVOOD
_
..
----~~-POR;;NT~-~
U.S.A.
AND
CANADA
i
Units
shipped
to
the
U.S.A. and Canada are designed !
for
operation
on
120
volts
AC only. These units are
not
equipped
with
an AC Voltage Selector
switch
and
the discussion
of
such a
switch
that
follows
should be
disregarded.
ALL
OTHER
COUNTRIES
I
Units
shipped
to
countries
other
than
the U.S.A. and !
I Canada are equipped
with
an
AC
Voltage Selector 1
L:
1tch
on the rear panel Refer
to
the
following
pa- !
graph
for
the
proper
setting
of
this
switch
. • i
--
...
- - . -
AC
VOLTAGE
SELECTION
This
unit
operates
on
120
.
220.
or
240
volts
AC
. The
AC Voltage Selector
Switch
on the rear panel is set
to
the
voltage
that
prevails in the area
to
which
the
unit
is shipped.
Before connecting the
power
cord
to
your AC outlet. make
sure
that
the
setting
position
of
this
switch
matches your
line
voltage
.
If
not.
it
must
be
set
to
your voltage in accor-
dance
with
the
following
direction
.
Note
:
--
-------
-
---
-----
- -
Our
warranty
does
not
cover damage caused by excessive line
voltage due
to
improper
setting
of
the AC Voltage Selector
Switch
.
'"""
''""il"
AC
120V
~
Position •
AC
220V
~
P
osit
ion
AC
240V
~
P
osition
Lever
I
io
•J@
1. Remove
screw
and
sto
pper plate.
2. Slide lever to your line voltage.
3. Lock lever
wit
h
stopper
plate
and
screw
.
AC VOLTAGE SELECTOR
SWITCH
CONTROLS, INDICATORS
AND
CONNECTORS
08
I
@
0
POWER
switch
Push in
to
turn on
power
. The built-in in
dicator
(L
ED
)
will
light. Push it again to
turn
power
off
.
@
PHONES
jack
Stereo headphones are plugged i
nto
this
jack.
Wh
en
SPEAKERS
switch
es
A and B are set
to
OFF, only
headphones can be heard.
@
SPEAKERS
switches
A -
Setting
this
sw
itch
to
ON activates
the
speakers
connected
to
the SPEAKERS A
terminals
;
setting
this
switch
to
OFF
disconnects
the speakers.
B -
Setting
this
switch
to
ON activates the speakers
connected to the SPEAKERS B
terminals
;
setting
this
switch
to
OFF disconnects the speakers.
0
TONE
controls
TURNOVER
(100
~
500
Hz) -This
control
varies the
turnover frequencies
of
the responsecurve
controlled
by the BASS
control
smoothly
within
the frequency
range
between
100
and
500
Hz.
BASS -Turning
clockwise
increases bass
tone
and
counterclockw
i
se
decreases it. Response is
flat
at
the zero posi
tion
.
MID
-Turning
clockwise
increases
mid
-range tone and
counterclockwise
decreases it. Response is
flat
at
the zero position. Boosting this frequency range can
im
prove the
clarity
of
a singer's voice
when
there
is
a
musical accompaniment.
Mid-range
control
is
not
affected by the TURNOVER controls.
TREBLE -Turning
clockwise
increases treble
tone
and
counterclockwise
decreases it. Response is flat at
the zero position.
TURNOVER
(2 ~
10
kHz) -This
control
varies the
turnover frequencies
of
the responsecurve
controlled
by the TREBLE
control
smoothly
within
the
frequency
range
between
2 kHz and 10 kHz.
0
TONE
switch
DEFEAT
-
With
the switch atthis setting
the
tone
controls
are bypassed and a frequency response is
flat
.
ON
-
With
the
switch
at
th
is setting the
tone
controls are
activated.
2
KR
-
770
(Kl
0 0
t)
0
(i)
DC
COUPLED
/
SUBSONIC
switch
The position
of
this
switch
determine
s w
het
her signals
will
pass
through
the tone
control
circuit or not.
DC
COUPLED
-
At
th
is setting the signal bypasses the
tone
control
cir
cuit
and
directly
enters the
powe
r
ampl
ifier to produce a perfectly
flat
response.
SUBSONIC
-
Atth
is
settingfr
equenci
esbe
l
ow
18
H
za
re
attenuated
at the rate
of
6
dB
per octave. This
provides filtering
of
subsonic signals and is useful in
reducing
turntable
rumble
or
the effects
of
warped
records.
f)
HIGH
FILTER
switch
ON
-
Setting
to
this
position
reduces signals above
10
kHz
at the rate
of
6
dB
per octave.
OFF
-
Sett
ing
to
this
posit
ion lessens
the
effects
of
tape
hi
ss
. record scratch, etc.
(!}
ATTENUATOR
switch
Setting
the
sw
itch to the -
20
dB position attenuates the
audio
output
by
20
dB. This convenient feature saves
having
to
disturb
the
se
ttin
g the
VOLUME
contro
l
when
answer
ing
the
tel
ephone
, for example.
0
LOUDNESS
switch
ON
-
Low
frequencies are boosted at
low
listening levels.
This precisely offsets a characteristic
of
human
hearing
whereby
we
are less sensitive
to
low
frequencies at very
low
listening levels.
OFF
-The
low
-level bass
boost
is removed and the
VOLUME
c
ontrol
provides
flat
response at all settings.
4ll)
BALANCE
control
This
control
permits
balancing
of
left
and right channels
when
an imbalance exists in
the
source sound,
or
to
correct
acoustic imbalance
due
to
room
conditions.
Move
it
to
the
left
from
the zero position
to
boost
the
left
channel; move it
to
the
right
of
the zero
posit
ion
to
raise
the
level
of
the
right
channel.
..
MIC
MIXING
and
MIC
input
Facilitates the mixing
of
microphone sound
with
any
program source selected
with
the SELECTOR
switch
.
Be
sure
that
the MIC
MIXING
control is set
to
SOU (fully
counterclockwise) before plugging a
mono
microphone into
the
MIC
jack. MIC mixing
is
activated by turning the MIC
MIXING control clockwise.
4B
VOLUME
control
This
control
adjusts
left-
and
right-channel
volume
simultaneously. Set
it
for the desired listening level. The
scale
is
provided
with
dB
graduations to indicate attenuation
when
maximum
output
level corresponds
to
O dB.
48
PEAK
LEVEL indicators
The PEAK LEVEL indicators (LEDs)
show
the effective
power
being delivered
to
your speakers.
The indicators are calibrated for
an
8-ohm
load.
If
4-ohm
speakers are used. multiply the reading by 2; for
16-ohm
speakers, divide the reading by 2.
t,
SELECTOR switches
AM
-Push this
switch
to
set the tuner for
AM
reception.
FM
-Push this
switch
to
set the tuner for
FM
reception.
PHONO
-
Push
this
switch
to
select the turntable con-
nected to the PHONO
input
jacks on the rear panel.
AUX
-Push this
switch
to
select the source connected
to
the
AUX
jacks on the rear panel.
The built-in indicator (LED) corresponding
to
the
SELECTOR
switch
operated will
light
.
41)
TAPE switches
The indicators in the upper parts
of
the TAPE
switches
show
the settings;
if
no
LED
lights,
it
indicates
that
the
switch
is
set
to
SOURCE;
when
the
LED
in
the
switch
lights,
it
indicates
that
the
switch
is set to PLAY.
TAPE A -Push this
switch
when operating the tape deck
connected
to
the TAPE A jacks.
TAPE B -Push this
switch
when operating the tape deck
connected
to
the TAPE B jacks.
Note: -
---
-----
-
----------
Be
sure the indicators (LEDs) in the TAPE switches are
not
lit
when
tape decks are
not
in use.
4D
AUTO
TUNING
switch
(seesaw
type)
AUTO
setting -
With
the AUTO/
MANUAL
switch
set
to
AUTO (unlatched position), pushing
the
left end
of
this
switch
shifts the tuning frequency indicated on
the
display
downward
automatically until a broadcast
station is received; pushing the right end
of
this
switch
shifts the tuning frequency
upward
until a broadcast
station is received.
Automatic
scan
tuning
can be
stopped during the search operation by pushing the
same end
of
this
switch
again.
MANUAL
setting -
With
the AUTO/
MANUAL
switch
set
to
MANUAL
(latched position), pushing the left end
of
this
switch
momentarily decreases the frequency by
steps,
FM
: one step =
200
kHz;
AM
: one step =
10
kHz.
If
the
left
end
of
this
switch
is
kept
depressed,
after 2 ~ 3 seconds the frequency is decreased
rapidly. When
it
reaches the
lower
limit
of
the
frequency range,
it
is automatically
switched
to
the
upper
limit
and advances
at
the same speed. Pushing
the
right
end
of
this
switch
performs the opposite
operation.
fl
FREQUENCY
DISPLAY
The digital display indicates
AM
and
FM
frequencies. allow-
ing you
to
tune correctly
to
the desired station using the
AUTO TUNING switch.
4D
MEMORY
and
PRESET
switches
MEMORY
-This
switch
is used to store desired station
frequencies
together
with
the PRESET switches. With
the
MEMORY
switch
pushed, the MEMORY indicator
(in the frequency display) lights for
about
5 seconds.
While
the MEMORY indicator
is
on. the display
frequency is locked. and
it
can be stored by pushing
one
of
the PRESET switches. The
light
of
the
MEMORY
indicator goes
off
when
the
PRESET switch
is pushed.
PRESET
-Preset stations are stored by the PRESET
switches. Each
switch
can store one
AM
and one FM
station. (Selection
of
AM
and
FM
stations is
accomplished by use
of
the SELECTOR switch). The
desired preset station can be received independently
of
the AUTO
TUNING
switch
.
41)
TU
NED/LOCK
indicator
Lights
to
show
when
an FM
or
AM
station is received and
automatically locked.
~
AUTO/MANUAL
switch
AUTO
(unlatched
position)
-This setting permits
automatic
AM
/
FM
tuning by pushing the AUTO
TUNING switch.
Muting
is
on at this setting.
MANUAL
(latched position) -This setting permits
manual
AM
/
FM
tuning by pushing the AUTO TUNING
switch
.
Muting
is
off
at this setting.
Muting
is
ac-
tivated only
when
AUTO TUNING is used.
~
SIGNAL
indicators
These indicators (LEDs)
show
the relative signal levels
of
incoming broadcasts. For best reception. the
FM
antenna
should be installed so
that
the highest possible number
of
indicators
light
.
fj
MODE
switch
STEREO
(unlatched position) -the
FM
tuner section
switches
automatically between stereo and monaural
operation in accordance
with
the operation
of
the tun-
ed
station. This position is used
to
cancel interstation
noise
when
tuning. To receive very weak stations and
that
are
too
weak
to
overcome the muting threshold,
push in to disable
muting
.
MONO
(latched position) -This setting releases muting
and provides monaural operation regardless
of
the
transmitting
mode.
fl
STEREO
indicator
With
the MODE
switch
set
to
STEREO, the indicator lights
if
the selected
FM
channel
is
transmitting
in
stereo and its
signal level is strong enough to overcome muting.
•
IF
BAND
switch and indicator
WIDE
-For normal use and
minimum
distortion.
NARROW
-
If
a very strong adjacent channel interfers
with
a desired
weak
channel. use this setting
to
eliminate the interference.
The indicator
lights
with
this setting.
KR
-
770(KI
3
SAFETY PRECAUTIONS
CLEANING
Do
not
use volatile solvents such as alcohol.
paint
thin-
ner. gasoline. benzine. etc.
to
clean
the
cabinet. Use a si-
licone cloth or a clean dry
cloth
.
VENTILATION
HOLES
The case
top
is slotted
to
allow
ventilation. Never
block these holes
with
ornamental
cloths.
books
, or
other
objects. Make sure
that
metal objects such
as
coins.
hairpins. or needles
do
not
enter
the
unit
through
the
venti-
lation holes. The result could be a serious
malfunction
or a
possible shock hazard. Make sure
that
children
do
not
insert
foreign objects
into
the
ventilation
holes.
SERVICE
OR
MODIFICATIONS
Do
not
remove the
cabinet
or touch internal parts.
Refer all service
to
qualified service personnel. Unautho-
rized
modifications
can result
in
a dangerous shock hazard
and can
void
the
warranty
.
POWER
CORD
Always
insert
or
remove
the
power
plug
from
the AC
outlet
by grasping
the
plug body. Never pull
or
stretch
the
cord. Take care
that
the
cord is
not
subject
to
traffic
or
bent
sharply around furniture. Keep heavy objects
off
the
cord;
never route
it
under rugs, and avoid
the
use
of
extra exten-
sion cords.
Attent
ion
to
these precautions
will
avoid fire or
shock hazards.
SYSTEM CONNECTION
DIAGRAM
FM
INDOOR
ANTENNA
FM
OUTDOOR
ANTENNA
i
A
75n
COAXIAL
300n
FEEDER CABLE
....__..;..;;_:....;.;..
__
'
..,..;;..,
---.J
I
,----------
J I
I,----------
J
I I r
-=-
-=----
--------
-To
AM
OU;DOOR
ANTENNA
l
w-1m.
;
......
,11
0':
TURNTABLE
TAPE DECK B TAPE DECK A
4 KA
-770(
K)
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1.JNSWlfC
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To AC
OUTLET
SPEAKER SYSTEM A
RIGHT
- +
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LEFT
RIGHT
SPEAKER SYSTEM B
SYSTEM CONNECTIONS
SPEAKERS
If
only one set
of
speakers is
to
be connected. make
connections
to
the
terminals
marked SPEAKERS A. Con-
nect
the
speakers
to
the
OJ
and
[[]
terminals
in accordance
with
the
location
selected for each speaker. To ensure cor-
rect speaker phasing, observe
polarity
marks
;
connect
termi-
nals
marked
(
+)
on
the
receiver
to
similarly-marked
speaker
terminals. Do the same
for
receiver and speaker
terminals
marked
with
a
minus
sign. Reversal
of
speaker leads
will
result in loss
of
bass
tones
and
poor
stereo separation.
If
a second set
of
speakers is
to
be used make
con-
nections
at
the set
of
terminals. marked B.
It
is
recommended
that
the tips
of
the speaker leads be
soldered,
or
the strands
of
individual leads be
twisted
together
to
eliminate
any possibility
of
short-circuits
forming
in the speaker
connecting
network
.
Note: -----
----------------
If a single pair of
speakers
is
to
be
used.
each
speaker
must
be
rated at 4 ohms or
more
.
TURNTABLES
Your stereo
turntable
has
two
audio cables
that
are
terminated
with
phono
plugs. Plug the
left
channel
plug
in
to
the
[I)
and the
right
channel plug
into
the [[J PHONO
input
jacks.
If
the
turntable
has a
ground
wire.
connect
it
to
this
unit's GND
terminal
to
avoid
hum
.
TAPE DECKS
If
on
ly one tape
deck
is
to
be
connected
to
the
system
it
is recommended
that
it
be
connected
to
the jacks
marked
TAPE
A.
Tape deck
input
and
output
cables are
normally
termi-
nated
with
phono plugs.
Playback
Plug
the
left
and
right
output
cables
of
the tape
deck
into
the [I] and
[ID
TAPE A PLAY jacks.
Record
Plug the
left
and
right
input
cables
of
the tape deck
into the
[Il
and
([]
TAPE A
REC
jacks.
DIN
Connector
If
your
tape
deck
is equipped
with
a DIN
connector
.
connect
it
to
the TAPE B
REC
/PLAY
connector
with
the
DIN
connecting cord. The DIN connection makes
both
input
and
output
connections
with
a single cord. and the signal
must
be controlled
with
the TAPE B
switch
on the
front
panel.
Note
: - -
----
- - -
--
-
---
------
If connections
are
made
with a
DIN
connecting cord, the TAPE B
PLAY
and
REC
jacks should not
be
used
.
Second
Tape
Deck
Plug
the
input
and
output
cables
from
the second tape
deck
into
the
REC
and PLAY jacks marked TAPE
B.
AUXJACKS
AUX
jacks are used
to
connect
other
high-level signal
sources. such as
tuners
. extra tape decks (equipped
with
preamps). TV
or
VTR
sound
output.
mic
preamps.
etc
.
3/8"
CD
Remove insulation
from
lead end.
@
Tw
ist strands tightly.
Speaker lead tips '
~~
@ Loosen the
screw
@Insert the
wir
e ® Tighten the
screw
Speaker Lead Connection
GROUND
For
maximum
safety
and
minimum
interference con-
nect
the
GND
terminal
to
a good earth ground
if
practicable.
A
good
earth
ground
is a cold
water
pipe
or
a
metal
stake
driven into
moist
earth.
However.
never use a gas pipe for
this
purpose.
Remote
Connector
To
operate
preset
tuning
while
absent. use
the
optional
Audio
Program
Timer
AT-500
and
connect
the connection
cord. supplied
with
the
AT-500.
between
the REMOTE con-
nector
of
the receiver and the REMOTE
connector
of
the
AT-500
.
AC
OUTLETS
The AC
outlets
on the rear panel
of
the
unit
may
be
used·
to
supply
power
to
other
components
such as a
turntable. tape deck.
etc
. Never connect any
equipment
here
whose
power
consumption
exceeds the capacity
of
each outlet.
1.
SWITCHED
outlet
-This is
50
watts
maximum
in
capacity and
power
is
controlled
by the POWER
switch
on
the
front
panel.
2.
UNSWITCHED
outlets
-This is
200
watts
maximum
in total
capacity
and
power
is available at all times.
KR-
770(
K) 5
-�.
J
OPERATING INSTRUCTIONS
PRESETTING
STATIONS
A desired station can be preset for reception at any
time
by
pushing one
of
the PRESET switches. A
maximum
of
6
AM
and 6 FM stations can
be
preset
with
the
PRESET
switches. To preset stations, proceed
as
follows:
1. Set the AUTO/
MANUAL
switch
to
AUTO (unlatched
position).
2.
Push the FM
or
AM
switch, whichever is desired.
3. Select the desired frequency by pushing either end
of
the AUTO TUNING
switch
while
observing the display.
Make sure
that
the TUNED indicator lights up
at
the
frequency
of
the desired stations.
4. Push the MEMORY
switch
and the
MEMORY
indicator
will
light
for about 5 seconds. Push the desired
PRESET
switch
while
this indicator is on.
Notes:
1.
If
the PRESET switch has
not
been pushed
while
the
MEMORY indicator
is
on. push the
MEMORY
switch
again
and then push the PRESET switch.
2.
If
the
MEMORY
and PRESET
switches
are pushed
simultaneously. an unexpected presetting order
might
occur;
for example.
if
the PRESET
switch
contacts earlier than the
MEMORY switch.
it
releases the tuned station and flips the
tuning frequency
to
the
lower
limit
of
the frequency range.
To prevent this. push the MEMORY
switch
and then the
PRESET switch. in turn.
to
store the desired station.
3. When a new station is preset over
an
old one. the frequency
of
the old station is removed
from
memory.
AUTO
TUNING
OF
FM/AM
BROADCASTS
With
the AUTO/
MANUAL
switch
set
to
AUTO.
proceed
as
follows:
FM
Reception
1. Push the FM switch.
2. Push either end
of
the AUTO
TUNING
switch
to
tune in
the FM broadcasting station automatically.
3.
Adjust
volume and tone for your preference.
AM
Reception
1. Push the
AM
switch
.
2. Push either end
of
the AUTO TUNING
switch
to
tune in
the
AM
broadcasting station automatically.
3.
Adjust
volume and tone for your preference.
PRESET RECEPTION
1. Push the
AM
or FM switch. whichever
is
desired. The
AM
or FM indicator can
now
be seen
at
the
left
of
the
display.
2. Push the desired PRESET
switch
. The frequency
of
your preset station is indicated on
the
display.
3.
Adjust
volume and tone
for
your preference.
MANUAL
TUNING
OF
FM/AM
BROADCASTS
With
the AUTO/
MANUAL
switch
set
to
MANUAL.
proceed
as
follows
:
FM
Reception
1. Push the
FM
switch. (The FM indicator at
the
left
of
the
display lights up).
2. Push either end
of
the
AUTO TUNING
switch
until the
desired frequency is indicated on the display. The
TUN
ED
indicator lights
when
correct
tuning
is attained.
3.
Adjust
volume and tone for your preference.
AM
Reception
1.
Push the
AM
switch
. (The
AM
indicator at the
left
of
the display lights up).
2. Push either end
of
the AUTO TUNING
switch
to
tune in
the desired frequency. The TUNED indicator lights
when
correct tuning
is
attained.
3.
Adjust
volume
and tone for your preference.
MIC
MIXING
Microphone
use
only.
To prevent
howling
, be sure
that
the
MIC
MIXING
control
is
set
to
SOU (fully counterclockwise) before
plugging the microphone
into
the
MIC
jack.
1. Plug the microphone into the
MIC
jack.
2. Set
the
MIC
MIXING
control to the
MIC
position (fully
clockwise).
3. Use the microphone.
4.
Adjust
volume and tone
for
your preference.
MIC
and
SOURCE
Mixing
The
mic
input
signal can
be
easily mixed
with
the
source selected
with
the SELECTOR switch.
If
a single tape
deck is used in your system
it
should be connected to the
TAPE B jacks for mixed recording.
To
mix
mic
and source signals, proceed as follows:
1.
Select the desired source
with
the SELECTOR switch.
2. Use the microphone and adjust the
MIC
MIXING
control for your desired mixing ratio.
3.
Adjust
volume
and tone
for
your preference.
4. Connect
the
tape deck
to
the TAPE B jacks for mixed
recording.
5. Set the tape deck in the recording mode.
6.
Adjust
recording level
with
the recording level controls
of
the tape deck.
MIC
and
TAPE
Mixing
If
two
tape decks are incorporated
into
your system.
mixed recording can be done
as
follows
:
1.
Connect one
of
the tape decks
to
the
AUX
jacks and the
other
tape deck
to
the TAPE B jacks.
2. Push the
AUX
switch.
3. Playback the tape deck connected
to
the
AUX
jacks and
adjust the
MIC
MIXING
control for your desired mixing
ratio.
4. Record the mixed performance
with
the tape deck con-
nected
to
the TAPE B jacks.
5.
Adjust
recording level with the recording level control
of
the tape deck connected
to
the
TAPE B jacks.
USE OF
AUDIO
PROGRAM
TIMER
(OPTION)
This receiver is equipped
with
the REMOTE connector
on the rear panel for connection
of
the AT-5OO Audio
Program Timer
to
permit
preset stations
to
be received.
With
the SELECTOR
switch
set to FM or
AM
in accordance
with
the
desired
station
. the AT-5OO can also be used to
record preset station broadcasts on tape
while
you are away
from
home by the connection
of
a tape deck. For details.
refer to the AT-5O0 instruction manual.
KR
-
770
(K)
7
TURNTABLES
1. Push
the
PHONO switch.
2. Operate the
turntable
.
3.
Adjust
volume
and
tone
for
your
preference.
TAPE DECKS
Tape
Playback
1. Set
the
TAPE A or B
switch
to
PLAY
to
select
output
from
tape decks
connected
to
the TAPE A
or
B
jacks
.
2. Operate the tape
deck
.
3.
Adjust
volume
and
tone
for
your
preference.
Monitoring
If
the tape deck is equipped
with
three
heads. you can
compare
the
sound
quality
of
the recording in progress
with
that
of
the source material by
switching
the
appropriate
TAPE
switch
between
SOURCE and PLAY
while
the
recording is in progress.
Recording (one
tape
deck)
1. Set one
of
the SELECTOR
switches
to
your
desired
program
source.
Set
the
both
TAPE
switches
to
SOURCE. To
monitor
the recording. set
the
appropriate
TAPE
switch
A or B
to
PLAY depending on the set
of
jacks
to
which
your tape deck is connected.
2. Set
up
your tape
deck
for
recording and
set
recording
levels
with
the
controls
of
your
tape
deck. The
volume
control and tone
controls
on the receiver
do
not
affect
the signal supplied
to
the tape deck
for
recording.
3.
Adjust
listening level
and
tone
at
the receiver
for
your
preference in
monitoring
the signal.
Recording
(two
tape decks)
1.
Set
one
of
the SELECTOR
switches
to
your
desired
program source.
2.
Set
both
TAPE
switches
to
SOURCE.
3. Recordings can
now
be made on
both
tape decks
simultaneously.
To
monitor
the recording. use the TAPE A
switch
as
follows: Set the TAPE A
switch
to
"PLAY"
to
monitor
the recording being made by the
tape
deck
connected
to the TAPE A jacks.
Note
:
----------
--
---------
When recording with two tape
decks
. the source signal
can
not
be
recorded
by
the tape deck connected to "TAPE
A"
jacks when the
TAPE
B switch
is
set to "PLAY".
4. Recording levels should
be
set using
the
controls
of
the
individual tape decks.
FM
DE-EMPHASIS
SWITCH
Before
shipment
this
switch
has been preset
to
the ap-
propriate position
for
the
expected
delivery area.
An incorrect
setting
will
adversely affect
high
frequen-
cy response. so check
that
the
setting
is
correct
before
operating the
unit
.
U.S.A. and U.S.
military
...
..
.........
.. ..
........ ..
..
.
European countries. Oceania
..
................. ...
..
.
75
µS
50
µs
Note: - - - -
---
-
----
-
--
-
--
---
The
25
µs
setting should
be
selected when this receiver
is
used
with
an
auxiliary Dolby*
NR
adaptor to receive Dolby
FM
broad-
c
asts
.
• Dolby
is
the
Trademark of Dolby Laboratories.
8 KR-
770
(Kl
Tape-to-Tape
Dubbing
Tape recordings
may
be
duplicated
easily using the
tape deck B
to
play
the
prerecorded
tape
and tape deck A
to
record
the
copy
.
SELECTOR•·--~~~-------~!
...
_
For Recording
Jl
_n_
SOURCE
SOURCE
A B
For
Playback
---
PLAY
A
..il.
SOURCE
B
For Playback
_n__
SOURCE
A
---
PLAY
B
For Dubbing
------ ------
PLAY
A
PLAY
B
The
input signal selected
by
one
of
the
SELECTOR
switches
is
always
present
at
afixed level
at
the
TAPE
A
and
TAPE
B
REC
jacks.
TAPE B TAPE A
[!?~
..
?17
....
Playback signal is supplied to
the
TAPE
A
PLAY
jacks.
and
is
heard
from the speakers.
TAPE
B
TAPE
A
__tn_EC
_,O
~LA
Y
RECt4Y
l.__
__
~I
...
4
Playback signal is supplied to the
TAPE
B
PLAY
jacks.
and
is
heard
from the speakers.
TAPE
B TAPE A
Switch
as
shown to record a copy
on
tape deck A from a tape played
on
tape deck B.
The
recording
can
be
monitored.
IN CASE
OF
DIFFICULTY
If
your receiver should
not
perform
as
expected,
consult
the table
below
to
see if the problem can be corrected before
seeking help from your Kenwood dealer
or
service representative.
AM,
FM,
PHO
NO
or Tape playback
CAUSE
REMEDY
Indicators out. no sound.
a)
Power
cord
not
plugged in. a) Check plug contact.
power
on.
b)
Poor
connection
at
wall
outlet.
b)
Check
outlet
using a
lamp
or
other
Power
outlet
inactive. appliance
(outlet
may
be controlled
by
a
wall
switch).
No
sound
from
left
or
right.
a)
Speaker cords disconnected.
a)
Check speaker
connections
.
b)
SPEAKERS
switched
off
.
b)
Check SPEAKERS
switch
.
c)
Volume
control
fully
counterclockwise
c)
Adjust
volume
.
d) Tape
switches
set
to
PLAY. d) Set
to
SOURCE except
when
tape
decks are in use.
Sound
from
left
or
right.
but
a) Poor speaker connections.
a)
Check
connections
at
both
ends
of
not
both
. speaker cord.
b) Defective speaker.
b)
Reverse speakers.
if
problem
stays
with
speaker have speaker checked.
c)
BALANCE
set
to
one side extreme.
c)
Check
setting
of
BALANCE
control
.
Occurs
during
AM
reception
only
CAUSE
REMEDY
Continuous
low-frequency
buzz.
Most
Interference
from
fluorescent lamps. Turn
off
fluorescent
lamps
or
lamp
noticeable on
weak
stations
or
at
night
. Lamp
dimmers.
other
appliances.
dimmer
.
Try
AM
outdoor
antenna and good ground
at
GND
connections
. This problem
may
be
impossible
to
eliminate
altogether.
High-frequency
whistle
especially a) Interference
from
TV
set.
a)
Turn
off
TV set.
if
problem
disappears
at night.
try
relocating TV set.
b)
Beats
from
adjacent
AM
stat
ion.
b)
Impossible
to
eliminate,
but
try
HIGH
filter
.
Intermittent
buu
or crackling sound.
a)
Lightning
a)
No
remedy.
b)
Fluorescent
lamps
starting.
b)
Try reversing AC plug.
c)
Appliance
or
furnance starting. c) Try reversing AC plug.
Occurs
During
FM
Reception
only
CAUSE
REMEDY
Continuous hiss
or
buzzing. Weak antenna signal Install
outdoor
antenna.
Occasional sharp
rhythmic
crackling
Ignition
interference from
autos
. Locate
outdoor
antenna
as
far from road
noise.
as
possible. use coaxial cable.
No
sound on
weak
stations
. Signal
too
weak
to
overcome
muting
.
Switch
MODE
to
MONO
.
Install
outdoor
antenna and
orient
for
highest
number
of
SIGNAL
indicators.
PH
ONO
Playback only
CAUSE
REMEDY
No
sound
from
both
or
one speaker.
Turntable
output
disconnected
. Check
phono
cables.
Loud
hum
drowns
out
sound. Poor
ground
connection
at
phono-cable
Check
phono
plugs
. particularly outer-shell
connections
. connections.
Howling
noise
at
maximum
volume
Acoustic
pickup
from
speaker. Increase
distance
between
speaker and
settings.
turntable
. Place
the
turntable
where
no
vibration
occurs.
KR
-
770
(K) 9
SPECIFICATIONS
AUDIO
SECTION
Power
Output
80
watts•
per
channel
m1mmum
RMS
,
both
channels
driven at 8 ohms from
20
Hz to
20,000
Hz with
no
more
than 0.
02%
total harmonic distortion.
Total
Harmonic
Distortion
(
20
Hz
to
20
,
000
Hz
from
TAPE)
rated
power
into
8
ohms
. 0.
02%
1
watt
power
into
8
ohms
. 0.
005
%
lntermodurat
ion
Distortion
(60
Hz: 8 kHz = 4 : 1 SMPTE)
ra
ted
powe
r
into
8
ohms
. 0.
02%
Slew
Rate .
Rise
Time
..
Damping Factor
(8
ohms
at 1,
000
Hz)
..
Input Sensitivity/Impedance
±
180V/
µsec
1 0 µ
se
c
60
PHONO
2.5
mV/50k
ohms
TAPE.
AUX
. 1
50
m
V/50k
ohms
MIC 2.5
mV/50k
ohms
Signal-to-Noise Ratio
(A
weighted)
PHONO .
83
dB for 2.5 mV input
TAPE.
AUX
..
MIC
Ma
x
imum
PHONO Input Level
at
1,
000
Hz
Frequency Response
PH
ONO RIAA Standard Curve
..
TAPE,
AUX
...
Tone Control
Bass (at
500
Hz
turnover)
Mid
Treble
(a
t 2 kHz
turnover
).
Turnover Control
for
Bass Control
................
.
for Treble Co
ntr
ol
Loudness Control
(VOL
-
30
dB) .
Subsonic Filter (DC Coupled OFF) .
High Filter
Output
Leve
l/
Impedance
TAPE
REC
Out (Pin)
(DIN)
FM
TUNER
SECTION
Usable Sensitivi
ty
..
50
dB
Qu
ieting Sensitivity
Mono
Stereo .
Signal
-t
o-Noise Ratio
at
65
dBf
Mono
.
Stereo
10
KR
-
770
(Kl
91
dB for 5.0 mV input
105
dB for
150
mV input
70
dB for 2.5 mV
input
240 mV (rms).
THO
0.
02%
20
Hz
to
20.QOO
Hz
±0
3 dB
DC Hz to
320
.
000
Hz - 3 dB
± 10 dB at
100
Hz
±10 dB at
800
Hz
± 10 dB at 10 kHz
10
0 ~
500
Hz
V
ar
iable
2 kHz ~
10
kH
z Variable
+10
dB at 1
00
Hz
18
Hz
6 dB
/ac
t
5 kHz 6 dB
/oct
150
mV/300
ohms
30
mV/80k
ohms
98d
Bf (
l7
µ
V)
16.1 dBi (3 5 µV)
35
.6 dBf (35 µ
V)
74 dB
70
dB
Total
Harmon
ic
Distortion
at
1.000
Hz (at
wide
band)
Mono
. 0.
09%
Stereo . 0.1%
Frequency Response .
Capture Ratio .
Image
Rejection Ratio ...
Spurious Response Ratio
IF
Response
Ra
tio .
Alternate
Channel
Selectivity
30
Hz
to
15.
000
Hz
+05
dB.
-1
.0 dB
1 0 dB
80
dB
90
dB
90
dB
WIDE
.
60
dB at
400
kHz
NARROW
.
75
dB
at
400
kHz
AM
Suppression Ratio . 55 dB
Stereo
Separation Ratio (at
wide
band)
at 1.
000
Hz .
50
dB
at
50
Hz
to
10
.
000
Hz
37
dB
Sub
carrier Product Ratio .
65
dB
Antenna
Impedance .
300
ohms balanced and
FM Frequency Range .
AM
TUNER
SECTION
Usable Sensiti
vity
Signal-
to
-Noise Ratio .
Image
Rejection
...........
.....
....
..
Se
lectivity
...
GENERAL
Power Consumption .
AC
Outlets
..
Dimensions. .
Net
We
i
ght
...
Gross
We
i
ght
.
75 ohms unbalanced
88
M Hz to
108
M Hz
18
µV
50
dB
40
dB
60
dB
350
watts
at
8
ohms
rated power
output
80
watts
at no signal
Switched 2. Unswitched 1
W:
538
mm
(21-3/
16
..
)
H.
133
mm
(5-1/ 4")
D.
365
mm
(14-
3/8")
12
kg
(
26
5 lb)
15
.5
kg
(34 2 lb)
•
Mea
sur
ed
pursuant
to Federal Trade Commission's Trade
Regulation rule on
Power
Output
Claims for
Amplifier
in U.S.A.
Note
:
Ke
nwood
follows
a policy
of
continuous
advanc
ements
in develop-
ment
. For this reason specifications
may
be changed
without
notice.
MEMO
KA
-
770
(K)
11
~KENWOOD
PRINTED
IN
JAPAN
850-3219
-
00
(K)
(G)
1
2345
/ 1
51
67890N/ 152 D1
2345/252
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