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Panasonic SG-J500 (K) - Performance Measurements and Adjustments; Radio Alignment Procedures

Panasonic SG-J500 (K)
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MEASUREMENTS
AND
ADJUSTMENT
@
Radio
Control
Positions
@
Volume
Control
@
Tone
Control
@
FM
Mode
Selector
Maximum
FM
AUTO
Audible
level
of
speaker
sound
(AM-RF,
FM-RF);
Minimum
(AM-IF,
FM-IF).
@
Output
of
signal
generator
should
be
no
higher
than
necessary
to
obtain
output
reading.
@
Make
certain
that
speaker
system
is
connected
to
the
receiver
when
aligning
(or
use
relivant
dummy
load
resistors).
AM-IF
ALIGNMENT
Test
equipment
connection
is
shown
in
figure.
Place
unit
into
AM
position.
Place
the
radio
dial
setting
to
point
of
noninterference.
Adjust
T202
and
T203
for
maximum
output
and
sym-
metrical
curve.
GENESCOPE CONDITION
Frequency
450k
Hz
1F-GENESCOPE
(TP203)
(TP202)
MW-RF
ALIGNMENT
1.
2;
Test
equipment
connection
is
shown
in
figure.
Place
unit
into
MW
position.
Place
the
radio
dial
and
signal
generator
setting
to
513
kHz.
(Set
the
dial
pointer
to
the
left
end
of
the
scale
or
lower
frequency
edge.)
Adjust
L205
for
maximum
output.
Place
the
radio
dial
and
signal
generator
setting
to
600
kHz.
Adjust
L201
for
maximum
output.
Place
the
radio
dial
and
signal
generator
setting
to
1645
kHz.
(Set
the
dial
pointer
to
the
right
end
of
the
scale
or
up-
per
frequency
edge.)
Adjust
CT202
for
maximum
output.
Place
the
radio
dial
and
signal
generator
setting
to
1645
kHz.
.
Adjust
CT201
for
maximum
output.
Repeat
steps
3.
~
10.
F
M
-IF
ALIGNMENT
Test
equipment
connection
is
shown
in
figure.
Place
unit into
FM
position.
Place
the
radio
dial
setting
to
point
of
noninterference.
Adjust
T7101
for
maximum
amplitude
and
symmetrical
curve.
(Refer
to
Fig.
1)
Adjust
T201
for
maximum
amplitude
and
proper
linearity
between
about
+
100
kHz
markers.
(Refer
to
Fig.
2)
Note:
Before
aligning,
turn
the
corest
of
T201
fully
counter-
clockwise.
AM
SIGNAL
GENERATOR
CONDITION
Modulation
Modulation
Frequency
30%
400
Hz
AM
SIGNAL
GENERATOR
OSCILLO-
AC
VTVM_
SCOPE
GENESCOPE
CONDITION
Frequency
IF
GENESCOPE
FM-RF
ALIGNMENT
Test
equipment
connection
is
shown
in
figure.
Place
unit into
FM
position.
Place
the
radio
dial
and
signal
generator
setting
to
87.3
MHz.
(Set
the
dial
pointer
to
the
left
end
of
the
scale
or
lower
frequency
edge.)
Adjust
L101
and
L102
for
maximum
output.
Place
the
radio
dial
and
signal
generator
setting
to
108.6
MHz.
(Set
the
dial
pointer
to
the
right
end
of
the
scale
or
up-
per
frequency
edge.)
Adjust
CT101
and
CT102
for
maximum
output.
Repeat
steps
3.
~
6.
Note:
As
three
output
reading
will
be
present,
adjustments
must
be
made
at
center
frequency.
FM
SIGNAL
GENERATOR
CONDITION
Modulation
s
..
-
30%
Modulation
Frequenc
.
.
400
H
ay
OSCILLO-
AC
VTVM
P.
FM
SIGNAL
GENERATOR
CNT
pian:
Dummy
Antenna
J
(tP102)
(TP302)
Terminal

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