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Sharp GF-6060H - Page 12

Sharp GF-6060H
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THE
INSTRUCTION
OF
FREQUENCY
ADJUSTMENT
(GF-6060H
ONLY)
In
order
to
comply
with
FTZ
rule:
Nr.
358/1970,
please
fix
the
low
end
of
dial
frequency
(87.5
MHz)
and
the
high
end
of
dial
frequency
(107.9MHz)
on
FM
band,
by
adjusting
FM
1F/RF
ALIGNMENT
SIGNAL
GENERATOR
RECEIVER
CONNECTION
TO
RECEIVER
INPUT
SIGNAL
FREQUENCY
DIAL
SETTING
REMARKS
oscillation
coils
(L4)
and
oscillation
trimmer
(TC2),
respec-
tively,
as
illustrated
in
Figure
14.
ADJUSTMENT
Refer
to
Figure
12—1.
Exactly
10.7
MHz.
(400
Hz,
30%,
FM
modulated)
High
end
of
dial.
(minimum
capac-
ity)
Adjust
for
best
“S”"
curve
Adjust
the
FM
IF
transformers
ea)
2.2)
Band
Coverage
Refer
to
Figures
12—2
and
30.
Exactly
87.1
MHz
(400
Hz,
30%,
FM
modulated)
Low
end
of
dial.
(maximum
capac-
ity)
Adjust
for
maximum
output.
Adjust
the
FM
oscillation
coils
(L4).
Same
as
step
2.
i
Exactly
109
MHz.
(400
Hz,
30%,
FM
modulated)
High
end
of
dial.
(minimum
capac-
ity)
Same
as
step
2.
Tracking
10.7
MHz,
FM
SWEEP
GENERATOR
FM
SIGNAL
GENRATOR
Same
as
step
2.
Exactly
88
MHz.
(400
Hz,
30%,
FM
modulated)
88
MHz
Same
as
step
2.
i
Adjust
the
FM
oscillation
trimmer
(TC2).
Adjust
the
FM
RF
coils
(L2,
L3).
Same
as
step
2.
Exactly
108
MHz.
(400
Hz,
30%,
FM
modulated)
108
MHz
Same
as
step
2.
Adjust
the
FM
RF
trimmer
(TC1).
SWEEP
TRIGGERAA,,_
DUMMY
(See
Figure
13—2)
FM
IF
AMPLIFIER
Repeat
steps
2,
3,
4
and
5
until
no
further
improvement
can
be
made.
Figure
12—1
TP2
OSCILLOSCOPE
EXT.
SP
(J105,
106)
Figure
12—2
1?
“S""
curve
AC
V.T.V.M.

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