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  9. Kenwood KR-710 User manual

Kenwood KR-710 User manual

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KENWOOD
HI/Fl
STEREO
COMPONENTS
SERVICE
MANUAL
KR-710
(KR-710L)
An
item
of
adjustment
is
written
in
three
languages
—
English,
French
and
German.
Un
article
sur
réglages
est
écrit
en
trois
langues,
Anglais,
Francais
et
Allemand.
Ein
Artikel
der
Abgleich
wird
auf
drei
Sprachen,
Englische,
Franzdsisch
und
Deutsch
geschrieben.
Photo
is
KR-710
STEREO
RECEIVER
CONTENTS
|
EXTER
NAG
VIEW
iiss
costes
ees
ten
desea
3
INFERNAL
VIEW
scccaciescncniieisiimat
y
oro
eet
4
BLOCK
&
LEVEL
DIAGRAM.............0.0..
ee
eters
4
DIAL
‘CORD
STRINGING
2
hieeiiiien
hice
are
5
PE
PA
hc
cssenn
otis
esate
ated
eens
roe
onion
5
EXPLODED
VIEW
ci
teriekcine
ened
wae
ee
6
ADJUSTMENT/REGLAGES/ABGLEICH
|...
en
7
PC
GOAR
D
oes
ee
et
14
SCHEMATIC
DIAGRAM
(KR-710)
....00.00
res
15
SPECIFICATIONS
(KR-710)
...........
cece
ccc
cece
eee
e
eee
ees
15
SCHEMATIC
DIAGRAM
(KR-710L)
.................
cece
etree
eee:
16
SPECIFICATIONS
(KR-710L)
2.0.0.0...
neee
reece
arenas
16
PARTS
UST
sci
eee
ee
ee
ie
17
Photo
is
KR-710L
_
Note:
~
Component.
and.
circuitry.
are.
‘subject
to.
modification
to
insure
best
3
operation
under
differing
|
jocal:
conditions.
‘This.
‘manual
is
based
on,
the
|
Se
(K)
standard,
and
prov
des
information:
on
regional,
circuit
modifi
catio
rough
use
of
alternate
schematic
diagrams,
and
information
¢
‘on
n
regional
;
Hoe
pen
sieeenee
bestared
eens
eoeenee
.
Seas
eg
teh
tweens
Of
20x
Pasewesesegentes
ee
SP
eR
s
ers
rerescereese
ernest
see
Tyee
ly
ot
amere
er
Se
ee
ere
eee
rr
err
ee
ee
ee
eee
ee
eee
eee
eee
ee
ORs
sesetsesevidecseenenseussessedonenanees
peg
tte
7
F,
;
:
Engisad
ween
LT
ERT
OHA
ATO
ORE
E
REESE
GERAD
HE
ES
st
teerenseesenenee
onrewne
‘ane
KR-710
EXTERNAL
VIEW
Dial
pointer
ass’y
Knob
(B21-004
1-05)
({K27-0132-04)
Dial
calibrations
(B20-0463-04)
KR-710
STEED
ECE
ES
Knob
Knob
{K23-0339-04)
(K23-0347-04)
Knob
(K27-0132-04)
Knob
(K27-0136-04
Phone
jack
Knob
Knob
(E11-0074-05)
(K23-0348-04)
(K23-0348-04)
GND
terminal
AC
out
let*
‘
(NQ8-0128-35)
(EQ3-)-
Antenna
terminal
Slide
switch*
(E20-0439-05)
{S31-)
Phono
jack
Power
cord®
Foot*
{E13-0612-05)
(E30-)
(JO2-)
Phono
jack
SP
terminal
{E13-0423-05)
{E20-0813-05)
*Refer
to
parts
list.
(P17)
PHOTO
is
KR-710.
INTERNAL
VIEW/BLOCK
&
LEVEL
DIAGRAM
Power
transformer*
Receiver
PCB
ass
'y*
Power
amp
section
(LO1-)
(X14-)
Front
end*
Power
supply
section
|
{(W02-)
Tuner
section
Power
amp
section
Phono
section
*Refer
to
parts
list.
(P17)
PHOTO
is
KR-710L.
BLOCK
&
LEVEL
DIAGRAM
ET
type.
Ceramic
‘te
LPF
FM
Y
iz
C2
Ct
1C2
aT
TUNING
CIRCUIT
er:
peer
(FT
am
Q—
Z8
a8
Le
C3
L4
am
ww
I
|
ats
fee
as
Zz
ee
PHONO
AM
>
TAPE
B
TAPEA
HIGH
FIL
LouNess
VOLUME
BALANCE
coe
aKERS
Prono
@
S198
-O-81+-
01
WOO
-#-#
C5,
6
$1
$2
3
5
6
OCt«SS
$7
—rec
©
5
$
S
—
[
LPLAY
@
TAPE
|
r—
REC
C
Leay
@
©
I4.9V/8N
39.948
2.35mV
DIAL
CORD
STRINGING
/REPAIR
DIAL
CORD
STRINGING
Tie
the
dial
cord
to
the
dial
spring.
Set
the
dial
pulley
as
illustrated.
Hook
the
dial
spring
on
the
boss
A.
oh
ee
starting
from
its
lower
side.
2)
starting
from
its
upper
side.
8.
Tie
the
end
of
the
dial
cord
to
the
dial
spring.
9.
Remove
the
dial
spring
from
the
boss
A.
_
Receive
a
90
MHz
signal,
and
then
mount
the
dial
pointer
at
the
90
MHz
position
of
the
dial
calibrations.
POWER
TRANSISTOR
REPLACEMENT
Mica
plate
Inslating
bushing
{F29-0030-00)
Hexagon
bolt
(NO9-0298-08)
Dress
the
dial
cord
in
the
direction
1
through
4.
Wind
the
dial
cord
two
turns
around
the
dial
shaft
_
Dress
the
dial
cord
in
the
direction
5
to
6.
7.
Wind
the
dial
cord
two
turns
around
the
dial
pulley
Boss
A
Dial
spring
EXPLODED
VIEW
M318
(Bre—Tap)
M3x14
(@r—Tap}
M4356
tf
—
Tap}
M3x8
(Or—
Tap)
’
M318
{6r—Tep)
+4
Refer
to
Parts
List
on
page
17.
iG
x
6
(F-Tap}
:-N88-3006-46
:
x
8
-N30-3008-46
M3
x
8
(Bi-Tap)
BLK
:N89-3008-45
W3x%8
(Bi~Tap?
BLK
M3xe
(8r—-Tap)
M3
x
8
(8r-Tap)
M3
x
14
(Br-Tap)
M3
x
20
43x78
(Or
~Tap)
M38
J
i6r—Tap)}
KR-710
:N87-3008-46
M48
(Br-Tap})
§:N87-4008-46
:-N87-3014-46
:N30-3020-46
KR-7
100
ADJUSTMENT
(TUNER)
oe
TEST
EQUIPMENTS
RECEIVER
OUTPUT
ADJUSTMENT
SSO
ee
CONNECTION
SETTING
SETTING
|
INDICATOR
POINTS
DISCRIMI-
95
MHz
FM-MONO
95
MHz
“
penn
ditto
1
kHz,
+75
kHz
Dev
ditto
ae
L7
OV
60 dB
(ANT
input)
DISCRIMI-
Minimum
El
NATOR
(3)
ce
Frequency
EM-
counter
to
the
junction
of
76
kHz
VCO
ditto
AUTO/MUTE
R22
and
VRS
VRQ
+200
Hz
95
MHz
via
an
AC
voltmeter
*3
95
MHz
1
kHz,
+68.25
kHz
Dev
PA
reas
7
T1
Minimum
IFT
©
eres
ag
R
(Front
end)
distortion
60
dB
(ANT
input)
SEPARA-
. . .
F
1
O00
kHz
AM
Maximum
folm
|
@
|
400
Hz,
30%
Mod
1
000
kHz
TRACKING
.
600
kHz
AM
.
|
TRACKING
re
1
400
kHz
AM
TC1,
2
sae
(2)
400
Hz.
30%
Mod
1
400
kHz
(Front
end)
1
000
kHz
MW
Maximum
MW
.
600
kHz
MW
.
Gece
ditto
400
Hz,
30%
Mod
600
kHz
ditto
MW
.
1
400
kHz
MW
|
lo
ee
400
Hz,
30% Mod
1
400
kHz
ditto
LW
.
160
kHz
LW
1
asia
400
Hz,
30%
Mod
160
kHz
ditto
95
MHz
O
Dev
60
dB
{ANT
input)
Bar
antenna
(A)
12
ditto
TC1,
2
(Front
end)
aio
Bar
antenna
(B)
L1
LW
|
340
kHz
LW
:
*1~4:
See
page
10.
ditto
REGLAGES
(TUNER)
REMARQUES
|
ss
APPAREILLAGE
ALIGNEMENT
!rRaccorp-
SECTION
MF
DISCRIMI-
95
MHz
FM-MONO
|
NATEUR
(1)
1
kHz.
+75
kHz
Dév
95
MHz
95
MHz
Spat
idem
1
kHz,
+75
kHz
Dév
60 dB
(Entrée
ANT)
DISCRIMI-
Distorsion
Relier
un
OSCIELA-
|
95
MHz
EM:
ae
sepa
76
kHz
TEUR
idem
0
Dév
AUTO/MUTE
|
“\
Bone
VRQ
Reeatrs
76
kHz
6O
dB
(Entrée
ANT)
a
voltmétre
CA.
*3
TFi
©
(+6.75
kHz
Dév)
60 dB
(Entrée
ANT)
Deel
ee
ee
SELECTION:
Lou
R
Signal
pilote
T1
Distorsion
(Partie
frontale)
minimale
SECTION
MA
(KR-710)
[ole
|
© |
wih
2
[wenn]
om
|
wate
|
atte
|
om
|
we
[an
wre
ate
Late
Ra
=
SECTION
MA
(KR-710L)
TFI
1
000
kHz
MW
Déviation
400
Hz.
30%
Mod
1
000
kHz
maximale
MW-
600
kHz
Antenne
MA
ALIGNEMENT|
‘e™
400
Hz,
30%
Mod
(A),
L2
MW.
oe
1
400
kHz
Mw
ae
TCi2>
aca
ALIGNEMENT
400
Hz,
30%
Mod
1
400
kHz
(Partie
frontale)
Sg
LW-
ae
160
kHz
LW
Antenne
MA
spans
ALIGNEMENT
400
Hz,
30%
Mod
160
kHz
(B),
L1
LW-
.
340
kHz
LW
|
*
1~4:
Voir
la
page
10.
idem
idem
KR-7
101
ABGLEICH
(EMPFANGER)
STEUR-
ABGLEICH
|
PRUFEINRICHTUNG
=
GERAT
AUSGANGS.-
EINSTELL-
BEMER-
EINSTEL-
ANZEIGE
PUNKT
KUNGEN
ANSCHLUSSE
EINSTELLUNG
LUNG
UKW-EMPFANGSABTEILUNG
DISCRIMI-
95
MHz
FM-MONO
NATOR
(1)
1
kHz,
+75
kHz
Hub
95
MHz
95
MHz
DISKRIMI-
1
kHz,
+75
kHz
Hub
dito
WZ
NATOR
(2)
60
dB
(Eingangs-
R6
signalpegel)
DISKRIMI-
2
Minimaler
ee)
NATOR
(3)
eo
Klirrfaktor
Frequenzzahier
zum
Kreuzungs-
SPANNUNGS-
ante
FM-
punkt
von
ne
GEREGELTER
dito
+
AUTO/MUTE
R22
und
VR9
VRQ
60 dB
(Eingangs-
uber
einew
+4
00
OSZILLATOR
signalpegel)
Wechsel
spann-
ungsmesser
*3
1
kHz,
+68,25
kHz
Hub
Wahler:
Loder
R
Pilotton:
(+6.75
kHz
Hub)
60 dB
(Eingangs-
signalpegel)
Minimaler
Klirrfaktor
STEREO
KANAL
*4
TRENNUNG
MW-EMPFANGS
ABTEILUNG
(KR-710}
1
000
kHz
AM
Marimaler
le
:
a
600
kHz
AM
dito
L1,2
(1)
400
Hz,
30% Mod
600
kHz
‘
(2)
400
Hz.
30%
Mod
1
400
kHz
.
(Frontende)
MW
UND
LW
-
EMPFANGSABTEILUNG
(KR-710L)
1
O00
kHz
MW
a
|
MW
F
600
kHz
400
Hz.
30%
Mod
erritantenna
(A)
L2
TCT
2
(Frontende)
Ferritantenna
(B)
ans
L1
*
1~4:
Sehen
den
page
11.
EMPFANGS-
BEREICH
(1)
MWw-
EMPFANGS-
BEREICH
(2)
LW-
EMPFANGS-
BEREICH
(1)
LW-
EMPFANGS-
BEREICH
(2)
dito
dito
600
kHz
1
400
kHz
400
Hz,
30%
Mod
MW
1
400
kHz
dito
160
kHz
400
Hz,
30%
Mod
LW
160
kHz
340
kHz
400
Hz,
30%
Mod
LW
340
kHz
KR-7
1011)
ADJUSTMENT
(TUNER)/REGLAGES
(TUNER)/ABGLEICH
(EMPFANGER)
*
4
*
4
Minimum
output
Adjust
the
tuning
knob
so
that
the
same
on
Nice
A
compromise
adjustment
may
be
required
if
left-to-right
and
amount
of
noise
is
observed
at
the
top
and
right-to-left
separations
are
unequal.
bottom
of
the
output
waveform
with
a
weak
|
*
5
FM
fronted
signal.
The
FM
front
end
section
is
completely
adjusted
in
the
*2
factory
and
further
adjustment
is
not
necessary.
When
the
Connect
the
DC
voltmeter
across
R6.
FM
front
end
section
cannot
be
repaired
by
replacing
semiconductors,
replace
the
FM
front
end
PCB
ass'y
and
do
the
following.
(1)
Set
FM-SG
to
90
MHz,
1
kHz
Mod,
+75
kHz
Dev,
60
dB
and
connect
it
to
the
antenna
terminal
of
the
receiver.
(2)
Receive
the
FM-SG
signal.
Ole
Veale:
(3)
Fix
the
dial
pointer
at
90
MHz.
*
3
*
4
*
4
Sortie
minimale
Ajuster
le
bouton
d’accord
de
facon
que
la
Ses
Beit
Si
la
sortie
la
droit
de
diaphonie
et
la
gauche
ne
sont
cieest
méme
quantité
du
bruit
puisse
étre
observe
pas
méme
regler
le
potentiometre
ajustable
pour
que
la
ten-
au
sommet
et
en
bas
de
la
forme
donde
de
sion
de
sortie
est
méme.
sortie
sous
des
conditions
d’alimentation
de
*§
signal
faible.
Si
la
partie
frontale
FM
ne
peut
pas
étre
réparée
en
rempla-
WZ
cant
les
semi-conducteurs
PCB
de
la
partie
frontale
et
effec-
Relier
un
voltmétre
de
C.C.
sur
R6.
tuer
les
opérations
suivantes:
(1)
Régler
FM-SG
a
90
MHz,
1
kHz
Mod,
+75
kHz,
60
dB
et
le
connecter
ala
borne
d’antenne
du
récepteur.
=
(2)
Recevoir
le
signal
FM-SG.
(3)
Fixer
l'aiguille
du
cadran
a
90
MHz.
Voltmétre
de
C.C.
*3
VR9
Compteur
de
frequence
A
la
terre
©
TP
|
-
ao
R22
10