Sharp FV-1800 User Manual

Signal generator
Receiver
Adjustment
NOTE A
Step
|
Band
Connection
to
receiver
Input
signal
frequency
Dial
setting
Remarks
11
|
SW2/!
Same
as
step
2
Exactly
4.5MHz
(400Hz,
|
4.5MHz
Same
as
step
1
Adjust
the
SW2
oscil-
30%,
AM
modulated.)
lator
core
(L9),
and
then
adjust
the
SW2
antenna
core
(L16,
L3).
12
'sw2
|
Same
as
step
2
Exactly
10MHz
(400Hz,
|
10MHz
|
Same
as
step
1
Adjust
the
SW2
oscil-
|
30%,
AM
modulated.)
|
lator
trimmer
(C14),
and
then
adjust
the
SW2
antenna
trimmer
(C19, C11).
13
|
SW2/|
Repeat
steps
11
and
12
until
no
further
improvement
can
be
made.
14
|SW3
|
Same
as
step
2
Exactly
13MHz.
(400Hz,
|
13MHz
Same
as
step
1
Adjust
the
SW3
oscil-
30%,
AM
modulated.)
lator
core
(L10),
and
then adjust the SW3
antenna core (L17, L4).
15
|SW3
|
Same
as
step
2
Exactly
23MHz
(400Hz,
|
23MHz
Same
as
step
1
Adjust
the
SW3
oscil-
30%,
AM
modulated.)
|
lator
trimmer
(C13),
and then adjust the
| SW3 antenna trimmer
|
|
|
(C18,
C10).
Repeat
steps
14
and
15
until
no
further
improvement
can
be
made.
.
Check
the
alignment
of
the
receiver
antenna
coil
by
bringing
a
piece
of
ferrite
(such
as
a
coil
slug)
near
the
antenna
loop
stick,
then
a
piece
of
brass.
If
ferrite
increases
output,
loop
requires
more
inductance.
If
brass
increases
output,
Change
loop
inductance
by
sliding
the
bobbin
toward
the
center
of
ferrite
core
to
increase
inductance,
FM ALIGNMENT CHART
Signal generator
Receiver
Step Connection to receiver
Input signal frequency
Dial setting
Remarks
loop requires less inductance.
or away to decrease inductance.
Adjustment
1 | Connect signal generator
Exactly 10.7MHz (400Hz, |
Tuning gang fully
Connect VTVM be-
Detune
T12 and T13
through
a
5PF
dummy
to
test
|
30%,
AM
modulated)
closed.
tween
test
point
|
Tune
T9,
T7,
T5,
T4
and
point
TP-1.
Generator
ground
(maximum
capacity)
|
TP-6
and
chassis
|
T3
for
maximum
indica-
lead
to
the
receiver
chassis.
ground.
tion.
2
Same
as
step
1
Exactly
10.7MHz
Same
as
step
1
See
NOTE
B
See
NOTE
B.
Cunmodulated)
3
|
Connect
signal
generator
|
Exactly
88MHz
(400Hz,
|
88MHz
Adjust
for
maxi-
|
Adjust
the
FM
oscillator
through
a
75
ohm
resistor
in-
|
30%,
FM
modulated)
mum
output
on
|
coil
(L12),
and
then
cluding
output
impedance
of
speaker
voice
coil
|
adjust
the
FM
RF
coil
signal
generator
to
the
tele-
lugs.
CELL,
L5):
scopic
rod
antenna.
Ground
lead
to
the
receiver
chassis.
4
|
Same
as
step
3
Exactly
108MHz
(400Hz,
|
108MHz
Same
as
step
3
Adjust
the
FM
oscillator
30%, FM modulated)
trimmer (C9), and then
adjust the FM RF trim-
mer (C8, C7).
5
|
Repeat
steps
3
and
4
until
no
further
improvement
can
be
made.
rr
rN
sss
NOTE B
1)
Connect
VIVM
(0.1
volt
range
DC
scale)
between
test
point
TP-3
and
chassis
ground.
2) Adjust T13 for 0 volt.
'3)
Change
signal
generator
frequency
10.7MHz+100kHz
and
—100kHz
approx.
Peak
separation
should
be
approx.
200kHz.
4) Adjust T12 for balanced peaks.

Sharp FV-1800 Specifications

General

Brand	Sharp
Model	FV-1800
Category	Radio
Language	English