Kenwood KR-7600 User manual

AM-EM
STEREO
RECEIVER
=
INSTRUICTION
MANUAL
_4
QKENWOOD

INTRODUCTION
The purpose of this manual is to acquaint you with the operating
features of your new receiver. You will notice that in every detail of
planning,
engineering,
styling,
operating
convenience,
and
adaptability,
we have sought to anticipate your needs and desires.
We suggest that you read through this manual carefully.
Knowing how to set up your receiver, to the best advantage, will
enhance
your
listening
pleasure
right
from
the
start.
You
will
also
become aware of the ease with which you can adjust your receiver to
meet your special requirements.
SERIAL NUMBER
Record
your
SERIAL
NUMBER
on
the
spaces
designated
on
the
warranty
card.
You
will
find
the
serial
number
on
the
back
of
the
unit.
AFTER UNPACKING
After
unpacking,
we
recommend
you
inspect
and
examine
the
unit
for
any
possible
shipping
damage.
If
your
unit
is
damaged
or
fails
to
operate,
notify
your
dealer
immediately.
If
your
unit
was
shipped
to
you
directly,
notify
the
shipping
company
without
delay.
Only
the
con-
signee
(the
person
or
company
receiving
the
unit)
can
file
a
claim
against
the
carrier
for
shipping
damage.
We
recommend
you
retain
the
original
carton
and
packing
materials
to
prevent
any
damage
should
you
transport
or
ship
your
unit
in
the
future.
INSTALLATION
PRECAUTIONS
i
a) Avoid locations subject to direct sunlight.
b) Avoid high or low temperature extremes.
c) Keep the unit away from heat radiating source.
d)
Keep
the
unit
at
least
four
inches
(about*ten
centimeters)
away
from
the
wail
and
other
things
for
ventilation.
WARNING:
TO PREVENT FIRE OR SHOCK HAZARD, DO
NOT EXPOSE THIS APPLIANCE TO RAIN
OR MOISTURE.
2 KR-7600(K}
IMPORTANT!
1.
Units
shipped
to
U.S.A.
and
Canada
are
designed
to
operate
on
120
volts
AC
only
and,
units
to
the
Scandinavian
countries,
on
220
volts
AC
only.
They
are
not
equipped
with
an
AC
Voltage
Selector
Switch,
and,
the
following
description
on
such
a
switch
should
be
disregarded.
|
2.
Units
shipped
to
all
other
countries
are
ecuipped
with
an
AC
Voltage
Selector
Switch
on
the
rear
panel.
The
following
description,
“AC
Voltage
Selection
and
P.
wer
Fuse",
should
—
be
carefully
read.
AC VOLTAGE SELECTION AND POWER FLISE
This
unit
operates
on
110
—
120
volts
or
220
—
240
volts
AC.
The
AC
Voltage
Selector
Switch
is
set
to
the
AC
voltage
generally
available
in
the
country
where
the
unit
is
shipped.
Before
connecting
the
power
cord
to
your
AC
outlet,
make
sure
that
the
setting
position
of
this
switch
corresponds
to
your
AC
voltage.
If
not.
it
must
be
properly
changed
in
accordance
with
the
directions
below.
In
such
a
case,
it
is
necessary
to
replace
the
power
fuse.
Consult
a
qualified
serviceman
then.
NOTE:
Our
warranty
does
not
cover
damage
caused
by
excessive
line
voltage
due
to
improper
setting
of
the
AC
Voltage
Selector
Switch.
. Remove screw and stopper plate.
2. Slide lever ta opposite side.
3. Lock lever with stopper plate
and screw.
_
ACI 20v~ ED , Stopper plate c1z0— \ | European type.
‘ac22ov-- Cy | ‘acz2ov-- Cy
AC VOLTAGE SELECTOR SWITCH

FEATURES
1. Adopted 2-Step Acoustic Compensator for flexible Acoustic
Compensation.
2. Capability for 2 sets of tape decks with Inter-dubbing (A to B)
function and unique Sound Injection System.
3. Dolby* N.R. Connection Jacks and De-emphasis Selector switch
for Dolbyized FM Broadcast Reception.
4, High sensitive (1.74V) and clear sound FM Tuner section by 4-
gang Tuning capacitor, MOS-FET, 3 x 2-element Phase-linear
Filters, Quadrature Demodulator, Dual Inline Package IC’s and
Phase Lock Loop MPX Demodulator
5. Other Features
2 Phono Inputs.
Speaker System A.B.C,
Function Indicator,
Tone Defeat Switch,
MiC Jack,
FM Detector Output and 2 Tuning Meters
* Dolby is a Trade Mark of Dolby Laboratories, Inc.
CONTENTS —
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INTERCONNECTING DIAGRAM .......ccccccccccccceseeeseseecececesees 4
CONNECTING INSFRUCTIONS........ccccccccccccccesceceseseseecevevee 5
CONTROLS AND THEIR FUNCTIONS .....cccccccccccccccsccceeeses 8
OPERATING INSTRUCTIONS ......ccccccccecscsceesesesescecsteseseeee 10 |
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BEFORE ASKING SERVICE.......c.ccccccccccccscecsescsveveessesesescees 15 :
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KR-7600tkK) 3

INTERCONNECTING
DIAGRAM
A
oie
SYSTEMS
B
SPEAKER
SYSTEMS
FM
INDOOR
OMENS
FM
OUTDOOR
ANTENNA
RIGHT
LEFT
RIGHT
uae
peices
:
DIRECTION OF
BROADCAST
STATION
WS
NOTE:
When
a
75
ohm
antenna
is
used
for
a
A
connecting
to
the
antenna
terminals,
To
“B”
Speaker
:
the
300
ohm
terminals
should
not
Terminals
be used, and conversely.
Aa
a EARKFAS 4-164
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ry
oN
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+
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INPUT A TAPE B
PHONO
1
PHOND
2
AUX
SLAY
PLAY
REC
REG
MAY
REC
hae
--
ANTENNA
ys
=
FM
GNO
AM
cy
t L
p
<q
20004-7809
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iA
a)
iii 4 ere
To AC OUTLET
ANTENUAS (=
FM GND
’ f
To *C” Speaker
Terminals
To “TAPE B” Jacks
ars 0 hii LEFT RIGHT
A
TURNTABLE
B
TURNTABLE
A
TAPE
DECK
B
TAPE
DECK
C
SPEAKER
SYSTEMS
4 ~~ KR-7600[K)

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CONNECTING INSTRUCTIONS
SPEAKER
CONNECTING
AND
SPEAKER
SWITCH
In
connecting
only
one
set
of
speakers,
connect
the
right
speaker
to
right
speaker
terminals
and
left
speaker
to
left
speaker
terminals
of
“A®
speaker
terminals.
Should
plus
or
minus
of
either
right
or
teft
channel
be
reversely
connected,
sounds
at
the
center
section
will
be
adversely
affected
by
lack
of
separation.
To
connect
additional
set
of
speakers,
connect
right
speaker
to
right
speaker
terminals
and
left
speaker
to
left
speaker
terminals
of
‘’B”
or
“C”
speaker
terminals.
Sound
cannot
be
heard
when
the
SPEAKERS
switch
on
the
front
panel
is
set
to
the
A
+
B
position,
when
only
one
pair
of
speaker
system
is
used
with
connections
made
either
to
“A”
speaker
terminals
or
“B”
speaker
terminals.
When
connecting
the
speaker
leads
to
the
speaker
terminals,
make
sure
that
the
bare
wire
strands
at
the
ends
of
the
speaker
teacis
do
not
touch
the
adjacent
terminal.
It
is
recommended
that
the
tips
of
the
speaker
cord
leads
are
soldered,
or
the
strands
of
each
individual
lead
twisted
together
to
eliminate
any
possibility
of
short-circuits
forming
in
the
‘Speaker
connecting
network.
Release
CONNECTION TO SPEAKER TERMINALS
a
oe
PHASING OF THE SPEAKERS
Speaker phasing can be determined in the fotlowing manner:
1. Set the SELECTOR switch to FM.
2. Set the MODE switch to MONO.
3. Tune in the desired station with the TUNING knob.
4. If the sound is coming directly from the front, the speakers are in phase,
If the sound comes from both sides and there is a noticeable loss in low
frequencies, the speakers are out of phase.
In this case reverse the leads on one speaker,
“A” Speaker terminals |\RIGHT? (LEFT!
+
s
WU
alt
Reverse connections of either
the LEFT or RIGHT speaker.
KR 7600tkK) 5§

CONNECTING INSTRUCTIONS
ANTENNA CONNECTION
Connecting The FM Antenna
Since FM broadcast signals travel along a straight, direct-line
path, they become rather weak behind hills and buildings even in the
vicinity of a broadcasting station. FM signals also become weak in
areas distant from a station even though there may not be any
obstruction to the direct-line path of the signal. Therefore, a good FM
antenna should be installed in the most EUSCHVE manner for best
possible FM reception.
in areas near the FM station, where signals are strong, stretch
the T-type indoor antenna that is supplied, to its maximum, and con-
nect it to the FM 30012 ANTENNA terminals. This antenna should be
carefully hung in the direction that provides best reception and clarity.
in areas subject to FM multipath interference such as locations
behind hills or in the shadow of buildings, an outdoor FM antenna
should be used. An outdoor FM antenna is also recommended for the
reception of weak and distant FM stations. Connections should be
made as follows: 300 ohm twin leads should be connected to the FM
3000? terminals, and 75 ohm coaxial cable to the FM 75 terminals.
Connecting The AM Antenna
The built-in AM ferrite antenna assures optimum AM reception.
In fringe areas or in locations surrounded by steel frame buildings
where satisfactory reception cannot be obtained with the ferrite anten-
na, an AM outdoor antenna should be connected to the AM terminal.
IVAN TABLE CONNECTION
The two shielded audio cables from your stereo turntable are
normally terminated with phono plugs. Connect the left channel of the
turntable to the “L’ PHONO 1 input jack and the right channel to the
“R™ PHONO 1 input jack.
If
an
additional
turntable
is
used
in
order
to
operate
two
turntables,
connect
the
left
channel
to
the
“L’’
PHONO
2
input
jack
and
the
right
channel
to
the
“R’
PHONO
2
input
jack.
If
the
turntable
has
a
grounding
wire,
connect
it
to
thts
receiver's
GND
terminal
to
avoid
hum.
T-TYPE INTERIOR FM ANTENNA
ANTENNA TERMINALS
6 -KR-7600 {K)
DIRECTION OF
BROADCAST ANTENNA
t Pf
750 COAXIAL dite
ANTENNA TERMINALS
Ss
DIN ANTENNA CONNECTOR
Units shipped to the European countries
are equipped with the DIN antenna con-
nector.

CONNECTING INSTRUCTIONS
TAPE DECK CONNECTION
Recording
A tape deck can be connected for recording as follows: left
channel input of the tape deck to TAPE A (or B) REC “’L” jack, right
channel input of the tape deck to TAPE A (or B) REC “R”’ jack.
Playback
A tape deck can be connected for playback as follows: left
channel output of the tape deck to TAPE A (or B) PLAY “L” jack, right
channel output of the tape deck to TAPE A (or B) PLAY ’R” jack.
DIN CONNECTOR (PLAY/REC CONNECTOR)
If your tape deck is equipped with a DIN connector, connect it to
“TAPE A” PLAY/REC connector with a DIN connecting cord. A DIN
connector enables recording and playback with this single cord.
NOTE: When a DIN cord is connected, TAPE A PLAY and REC jacks should not be
used. However, TAPE 8 PLAY and REC jacks can always be used
regardless of the DIN cord connection.
AUX (AUXILIARY INPUTS)
High level INPUT AUX jacks are for miscellaneous sources, such
as extra tape decks, additional tuners, TV sound outputs, and other ex-
ternal components.
AC OUTLETS
The AC outlets on the rear panel of the receiver may be used to
supply power to other components, such as a turntable. tape deck, etc.
1. SWITCHED outlet
This outlet ts controlled by the POWER switch on the front panel.
{The capacity is 100 watts maximum).
2. UNSWITCHED outlets
These outlets deliver power at all times. (The total capacity is
200 watts maximum.)
NOTE: 1. Donot connect here any equipment whose power consumption exceeds
the capacity of each outlet.
2. Units shipped to the European countries are not equipped with the AC
Outlets.
FM DEF OUT JACK
The FM detector circuit output is made available here so that thrs
receiver will be ready for 4-channel broadcasting developments in the
future. When FM discrete 4-channel broadcasting becomes 4a reality.
a simple der..odulator connected here will enable you to fully enjoy this
coming development.
ADAPTOR IN-OUT JACKS
When ji is desired to set up a 4-channel stereo system or a Dolby
NR system, remove the attached jumper connector and connect
another decoder amplifier or Dolby NR adaptor to the ADAPTOR
jacks. For cstailed instructions on connections, etc., see the instruc-
tion manual supplied with the adaptor.
NOTE: Wher using the ADAPTOR jacks do not use the attached jumper connector
in other jacks. Keep it, because it must be plugged into these jacks when
they are not used.
KR-7600(K} 7

@ POWER switch
Move up to ON to power the set, down to turn it OFF.
@
SPEAKERS
switch
|
OFF
—
This
position
silences
all
speakers
for
private
headphones
listening.
A
—
Activates
speakers
connected
to
the
“A”
speaker
terminals
on
the
rear
panel.
B
—
Activates
speakers
connected
to
the
“B”
speaker
terminals
on
the
rear
panel.
A+B
—
Activates
simultaneously
two
sets
of
speaker
systems
connected
to
the
A
and
8
speaker
terminals.
A
—
Activates
speakers
connected
to
the
“C”
speaker
terminals
on
the
rear
panel.
©) PHONES jack
insert a stereo headphone plug into this jack for private listening. The speakers are
silenced when the SPEAKERS switch is set to OFF position.
© TONE controls
BASS control
Turning it clockwise increases bass tone and counterclockwise decreases it. Tone is
flat at zero position.
TREBLE control
Turning it clockwise increases treble tone and counterclockwise decreases it. Tone
is flat at zero position.
a
@ ACOUSTIC controls =
These controls provide the frequency response emphasis of 3 dB or 6 dB around 50
Hz or 800 Hz. Set the ACOUSTIC controls in accordance with the type of broadcast
or personal preference.
@ BALANCE control
This control adjusts unequal volume from any program source in right and left
channels. The left channel is accentuated when this control is turned from center
toward the left side, and conversely.
@ VOLUME control
This contro! adjusts volumes in both channels (right and left) simultaneously. Set it
to your own most satisfactory listening fev«l.
@ TAPE switch
Switch positions and functions are as followys:
SOURCE — For listening to the source signal.
A PLAY — For monitoring a recording or fe: playback on a tape deck connected to
the TAPE A jacks.
Sound recorded on the tape is heard.
B PLAY — For monitoring a recording or fot playback on a tape deck connected the
TAPE B jacks.
8 KR-7600 (kK)
CONTROLS AND THEIR FUNCTIONS |
Vike span’:
Sound recorded on the tape is heard.
B MON (A> B) — For dubbing from a tape deck connected to the TAPE A jacks into
a tape deck connected to the TAPE B jacks. The recording condition of the B tape
deck can be monitored.
SOURCE MON {A> B) — For reproducing simultaneously from the speakers other
program sources selected by the SELECTOR switch such as an FM broadcast or
phono disc reproduction during the tape dubbing operation (A > B).
© INPUT SELECTOR switch
Switch positions and functions are as follows:
AM — For the reception of AM.
FM — For the reception of both FM mono and stereo signals. Automatic switching
operates between FM mono and stereo sources.
When an FM stereo broadcast is tuned in, the STEREO indicator lights up.
PHONO 1 — In this position the turntable is available if connected to the PHONO 1
input jacks on the rear panel.
PHONO 2 — In this position the turntable is available if connected to the PHONO 2
input jacks on the rear panel.
AUX — In this position any source is available if connected to the AUX input jacks
on the rear panel.

ralltas SHON) ¢
AELAY :
@ 8) ©
SOUND INJECTION switch and MIC jack ne
Pull the switch toward you when using a mic. Mic sound increased if you turn the
switch clockwise, pulling it toward you. Refer to page 13 for further details.
@ TUNING knob
The TUNING knob selects the desired AM or FM station signal. Adjust tt for max-
imum deflection of the SIGNAL meter as you listen to the sound output from the
speakers. For FM broadcasts also observe the TUNING meter to achieve accurate
reception.
@® FM MUTING switch
This switch silences interstation noise on the FM band, but it may also eliminate the
signal of a weak and distant station along with the interstation noise. Therefore, set
this switch to OFF (by pressing button release} in the reception of a weak and distant
Station.
® —&M DE-EMPHASIS switch
Selects 75s (50s) or 25us FM DE-EMPHASIS for accurate reception of Dolbyized
FM signals. Normally, this switch should be left in the “OUT” (by pressing button
release) position. However, if the station is broadcasting the Dolbyized signal using
a 25us pre-emphasis, first connect the Dolby Decoder to this unit and put this switch
in the “25yus" position to obtain flat FM frequency response. If in doubt. call the sta-
tion.
THEIR FUNCTIONS
@ LOUONESS control
The LOUDNESS control boosts bass and treble tones at low listening levels. Our
ears have less sensitivity to low and high frequencies at low listening levels and the
LOUDNESS control compensates for this deficiency. This control should be switch-
ed off {by pressing buttgn release) when listening at normal and high levels.
(B MONO (Mode switch)
Mixes Jeft and right channels when this push button is “IN” position.
@ REVERSE switch
This
push
switch
reverses
positions
of
channels.
The
left
channel
is
now
heard
from
the right speaker, and the right channel from the left speaker.
QM SIGNAL and TUNING meter
SIGNAL meter — Meter indicates signal strength for AM and FM. Maximum def-
lection indicates best receiving condition.
TUNING meter — This meter is used for precise tuning to the center of an FM
channel. Turn the tuning knob until the meter pointer is in the center of the meter
scale. This provides maximum separation and minimal distortion.
© TONE DEFEAT switch .
This switch provides flat frequency response with tone control circuit deactivated.
BASS and TREBLE controls do not operate when this switch is set to ON.
@) LOW and HIGH FILTER switches
LOW FILTER — Setting this switch to on reduces low frequency noise, such as
turntable rumble, etc., which may interfere with program material.
HIGH FILTER — Setting this switch to on reduces any high frequency noise, such
as tape hiss, record scratches, etc.
KR-76001k} 9

OPERATING
INSTRUCTIONS
AM-FM RECEPTION
1.
Set
the
INPUT
SELECTOR
switch
to
AM
or
FM.
2.
Set
the
MODE
switch
to
STEREO
(by
button
release)
and
the
TAPE
switch
to
SOURCE.
3.
Adjust
the
VOLUME
control
to
the
desired
listening
level.
4.
Use
the
BASS,
TREBLE,
ACOUSTIC,
FILTER
and
LOUDNESS
controls
to
adjust
sound
as
desired
and
to
match
the
acoustic
conditions
of
your
room.
TURNTABLE OPERATION
1.
Two
pairs
of
phono
input
jacks,
PHONO
1
and
PHONO
2,
are
provided
to
enable
connections
to
two
turntables.
To
reproduce
the
output
of
the
turntable
that
is
connected
to
PHONO
1
jacks,
set
the
INPUT
SELECTOR
switch
to
PHONO
1.
To
reproduce
the
output
of
the
turntable
that
is
connected
to
PHONO
2
jacks,
set
the
INPUT
SELECTOR
switch
to
PHONO
2.
2.
Set
the
MODE
switch
to
STEREO
(OFF)
and
the
TAPE
switch
to
SOURCE.
3.
Adjust
the
VOLUME
to
the
desired
listening
level.
4.
Use
the
BASS,
TREBLE,
ACOUSTIC,
FILTER
and
LOUDNESS
controls
to
adjust
the
sound
to
your
preference
and
to
the
acoustic
conditions
of
your
room.
TAPE DECK OPERATION
TAPE MONITORING
If
you
use
the
receiver
with
3-head
type
tape
decks,
you
can
check
the
sound
quality
of
the
recording
that
is
being
made
by
momentarily
comparing
the
recorded
signal
with
the
source
signal
as
follows:
Set
the
TAPE
switch
to
A
PLAY
(or
B
PLAY)
to
monitor
the
recorded
sound.
Set
the
TAPE
switch
to
SOURCE
to
monitor
the
source
signal
before
it
is
recorded.
WHEN
RECORDING
WITH
ONE
TAPE
DECK
Connect
the
tape
deck
to
either
TAPE
jacks
or
TAPE
B
jacks
on
the
rear
panel.
10. -KR-76001IK}
Recording
1.
Set
the
INPUT
SELECTOR
switch
to
the
desired
program
source,
To
monitor
the
recording,
set
the
TAPE
switch
to
A
PLAY
or
B
PLAY,
whichever
site
the
tape
deck
is
connected.
2.
Recording
level
should
be
adjusted
with
the
volume
control
of
your
tape
deck.
3.
Recording
is
not
affected
by
the
VOLUME,
BASS.
TREBLE,
ACGUSTIC,
FILTER,
LOUDNESS,
etc.,
controls
of
the
receiver.
WHEN
RECORDING
WITH
TWO
TAPE
DECKS
Connect
one
tape
deck
to
TAPE
A
jacks
and
the
other
to
TAPE
B
jacks
on
the
rear
panel.
TOupC
TAPE
A
TAPE
B
SPEAKER
SOURCE}
REC
PLAY
REG
PLAY
fee
©)
——©)
ar
|
source
|
|
SIGNAL
TAPE A
TAPE B
[A PLAY] Pf ‘= RECS 6 ai
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SOURCE
q
SIGNAL
ee
ees
al
TAPE A TAPE B
REC PLAY REC PLAY
Bray o—e o—?
SOURCE
|
q
SIGNAL
TAPE B
TAPE A
B
MON
REC
PLAY
REC
PLAY
en aan on ©) (9) ©)
{Ah
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foe
aly
[are
Q
MON
5
‘
TT
SOURCE
ee
ees
AL,
SIGNAL
THE
DIAGRAM
OF
THE
TAPE
MONITOR
SWITCH
AND
THE
SIGNAL