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JVC RX-807VTN

JVC RX-807VTN
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RX-807VTN
FM/AM
Tuner
Alignment
Procedures
T101
>
One
LP101
Wiles
Ao
eo
e
oe
ge
o
TC105
—
SS)
be101
Lpioz«
{=}
108
(=)
T103
7106
T105
FRONT
1.
FM
section
@
FM
oscillator
:
L103
(1)
Set
the
frequency
display
to
“108.0MHz’”.
(2)
Confirm
the
FM
inter-station
noise
is
received.
(3)
Adjust
L103
so
that
the
voltage
of
test
point
“TP251"
becomes
8.3V+0.1V.
(4)
Set
the
frequency
display
to
“87.5MHz“
and
confirm
the
voltage
of
test
point
“TP251”
is
1.5V~2.2V.
HM
FM
antenna
coil
:
L101, L102,
(1)
Adjust
L101,
and
L102
to
obtain
the
maximum
sensitivity
at
89.9
MHz.
@
FM
antenna
trimmer
:
TC101,
TC102
(1)
Adjust
TC101
and
TC102
to
obtain
the
maximum
sensitivity
at
105.9MHz.
(2)
Repeat
the
adjustment
of
L101,
L102,
TC101
and
TC102.
M@
FM
detector
coil
:
T7141,
7142
(1)
Connect
a
digital
voltmeter
to
test
point
“TP141”,
and
receive
to
“100.1MHz”
signal
with
SSG
ATT
70
cB.
(2)
Adjust
T141
so
that
the
digital
voltmeter
becomes
0+1.5mV.
(3)
At
the
same
time,
Adjust
T142
so
that
the
monaural
distortion
of
the
output
becomes
minimised.
2.
MW
section
Note:
[]
:TheU.S.A.,
Canada
()
:
Australlia,the
U.K.
and
Continental
Europe
{}
:
Other
coutries
Channel
space
9kHz
[]
:Other
coutries
Channel
space
10kHz
H
MW
oscillator
:
T103
(1)
Set
the
frequency
display
to
[
530kHz
}
(522kHz)
{531kHz}{530kHz]
and
confirm
the
voltage
of
test
point
TP101
is
0.9V+0.2V.
(2)
Set
the
frequency
display
to
[
1710kHz]
(1629kHz)
{1602kHz}[1600kHz]
and
confirm
the
voltage
of
test
point
TP101
is
{
8.0+0.8V]
(7.5V
+0.8V)
{7.2V
£0.7V}
[7.2£0.7V].
(3)
If
its
voltage
exceeds
the
allowance,
adjust
T103
to
obtain
the
voltage.
MW
antenna
coil
:
T101
(1)
Connect
a
loop
antenna
to
the
“AM
Loop”
terminal
on
the
rear
panel.
(2)
Adjust
T101
to
obtain
the
best
receiving
sensitivity
at
600kHz
or
603kHz.
MW
antenna
trimmer
:
TC105
(1)
Adjust
TC105
to
obtain
the
best
receiving
sensitivity
on
1400KHz
or
1404kHz.
LW
section
Note
[]
:
Italy
LW
oscillation
:T104
(1)
Set
the
frequency
display
to
144kHz
and
adjust
T104
so
that
the
voltage
of
TP101
becomes
0.8+0.4V[0.8V
£0.1V].
(2)
Setthe
frequency
display
to
353kHz
[290kHz]
and
confirm
the
voltge
of
test
point
TP101
is7.7V
+
0.6V
(5.7V
0.5].
LW
antenna
coil
:
T102
(1)
Connect
a
loop
antenna
to
the
“AM
Loop”
terminal
onthe
rear
panel.
(2)
Adjust
T102
to
obtain
the
best
receiving
sensitivity
at
164kHz
[164kHz].
LW
antenna
trimmer
:
TC106
(1)
Adjust
TC106
to
obtain
the
best
receiving
sensitivity
at
353kHz
[245kHz].
(No.
20333)
1-23

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