Adjustment - Kenwood KT-7020 Service Manual

Am-fm stereo tuner
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KT-7020
|
~
KT-7020
ADJUSTMENT
ADJUSTMENT
INPUT
OUTPUT
TUNER
ALIGNMENT
OUTPUT
TUKER
TEM
SETTINGS
SETTINGS
SETTINGS
POIATS
ALIGN FOR
SETTINGS
SETTINGS
Unless otherwise cpecified,
the individual switches should be set as following:
(a)
98. 0MH2
ALIGHMENT
POINTS
ALIGN FOR
$8. OMEz
SELECTOR: L or &
kHz, £68. 25kHz dev
SELECTOR:Fi
IF BAND:¥iDE
RF SELECTOR:DISTANCE
TUNING MODE:AUTO
REC CAL: OFF
Connect a DC
PROGRAM: OPP
Wininua distortion.
BAND EDGE
-
voltmeter between
| TUNING MODE:
Pilot:
46. 75kHz dev
ie)
TP3CV¥T) and TP4(GHD).| MARU 87. SWH2
80dBu(ANT input)
Connect a DC
{C)
BAND EDGE
~
voltmeter between
| TUNING MODE:
TCL
DISTORTIONCT)
98. OWHz
TP3CVT) and TPACGHD) MANU 108, OMHZ
STEREO
SELECTOR: L or R
98. OMHz
¥R2
:
;
Repeat alignaents 1 and 2 several tim
NARROW
1kHz,
£68. 25kHz dev
(B)
IP BAND:
x88-)
Mininua distortion.
th)
(E & T types) | Pilot:46.75kHz dev
NARROW
98. OM
Connect a DC
80dBu(ANT input)
DISCRIMINATOR
0 dev
voltmeter between
98, Oz
0.000Vti0a¥
Repeat the adjustuents
from I0 to 15 a few tiaee to miniaize the distortion.
100dBuCANT input)
{TPSCAFC)and TP6CYREF) |
(c)
79)
Connect
98. 0MH2
98. OMl2
a DC voltaeter
SEPARATION
SELECTOR: R
vR4
PLL DETECTOR
0 dev
between TPT(¥CC/2)
0. 000¥420a¥
a)
1kHz,
#68. 25kHz dev
(8)
98. OWBz
(X05-)
Minimua crosstalk.
100dBuCANT input)
and TP8(DET).
Ro-L
Pilot: t6.75kHz dev
a)
Connect
| "esa input)
98. OMHz
a frequency counter
(c)
|
0 dev
between ms
|
19. 000kHz+108z
98. O4RZ
1004BuCANT input)
and TP20(¥CO).
SEPARATION
SELECTOR: L
vRS
(a)
Waxiaua aaplitude
@
1kHz, 268. 25kHz dev
(B)
98. MHZ
(x05-)
Miniaua crosstalk.
RF ALIGNMENT
98. OMHz
(BY
98. OMHz
Lt.4,7,10
and cyametry
Pilot: +6.75kHz dev
Iktiz, 475kH2z dev
x Repeat the sequence from LI--L4—-L?—--L10--L1+:- + --
[o)
Maxiaua amplitude
iFTCL)
98, O¥Hz
(B)
98. ONHZ
Lit
and syasetry
kHz, +75kHz dev
(x05-)
of the oscilloscope display,
(A)
Maxiaum auplitude
8
IFT(2)
98. OWHz
(B)
98. OMHz
and syasetry
kHz, +75kHz dev
of the oscilloscope display.
(A)
Position where the STEREO
98. OMliz
indicator lights
SELECTOR: MAIN
-
98. OMRz
when the control is
of the oscilloscope display.
80dBu(ANT input)
Repeat the adjustments of 16 and 17 a few times so that the B-to
AM
SECTION
Keep the All loop antenna installed.
SELECTOR: AM TUNING KODE:AUTO
REC CAL:OFF
PROGRAM: OFF
Connect a DC
voltmeter between
TP3CVT) and TP4CGRD)
Connect s DC
voltmeter between
TP3(¥T) and TPACGND).
Repeat alignments [1] and {2} several tines.
-L and L-to-R separations are equal.
530kHz
161 0kHz
9
AUTO-STOP
SENSITIVITY
lkHz,#75kW2 dev
(X86-)
rotated gradually clockwise
(D)
w
Maxisua amplitude
J2dBuCANT input)
from the sost.
RF ALIGNMENT
630kHz
(BD
630kH2
and symmetry
a
a)
400Hz,30%_ nod
(x05-)
of the oscilloscope display |
98. OMNZ
(b>)
&
iz
Maxinua amplitude
DISTORTION(1) | SELECTOR: MONO
(8)
98. OWHz
Miniaua distortion.
RF ALICKMENT ] .
1440kH2
()
1440kHz
Tez
and syanetry
DET
1kHz, +75kHz dev >
400H2,30% aod
of the oscilloscope display.
B0dBuCANT input)
ts [3] and [4] several tines.
(©)
®)
ww
Maximus anplitude
98. OMHz
999kH2
(B)
999kHz
and syanetry
DISTORTION(2)
SELECTOR:
WONO
(B)
Winimus distortion.
of the oscilloscope display.
400H2,30%
od
@ L28 has been preset so the adjustaent is usually not required.
vr The peak will be easier to locate if the test loop antenna is used.
WON0
kHz, +75kHz dev *
80dBu (ANT input)
()
98. OMHz
SELECTOR:
MONO
1kHz,+75kH2 dev %*
80dBu(ANT input)
Adjust 10, 11 and 12 alternately a few tines to ainiaize the MOKO distortion.
* EAT types: ikiz, t46kHz dev.
)
98. OMHz
SELECTOR:
SUB
kHz,
£68. 25kHz dey
Pilot:26.75kHz dev
S0dBu(ANT input)
©)
98. OMHz
SELECTOR: SUB
IkHz, t68.25kHz dev
Pilot:26.75kEz dev
8OdBuCANT iaput)
After the adjustment of 14,
DISTORTIONC3)
WONO
98. OMHz
Minieum distortion.
DISTORTIONC4)
STEREO
(8)
98. OMEz
Miniaum distortion,
DISTORTIONCS)
STEREO
Winieus distortion.
adjust
13 again
to sinimize
the distortion
at 1kHz.
20
21

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