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Panasonic RX-C300 - Measurements and Adjustments

Panasonic RX-C300
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nD,
Oxs10)0)
MEASUREMENTS
AND
ADJUSTMENTS
&
ALIGNMENT
INSTRUCTION
READ
CAREFULLY
BEFORE
ATTEMPTING
ALIGNMENT.
1.
Set
volume
control
to
minimum.
2.
Set
graphic
equalizer
to
center.
3.
Set
band
switch
to
AM
or
FM.
4.
Set
balance
control
to
center.
&
MW
and
SW
ALIGNMENT
Fashion
loop
of
several
turns
of
wire
and
radiate
signal
into
loop
of
receiver.
455
kHz
30%
Mod.
at
400
Hz
AM
AM
(5)
&
FM
ALIGNMENT
SIGNAL
GENERATOR
or
SWEEP
GENERATOR
CONNECTIONS
FREQUENCY
BAND
10.7
MHz
(SWP.)
High
side
thru.
0.001
UF
to
test
(1)
point
7
.
Negative
side
to
test
point
W
.
(2)
SIGNAL
GENERATOR
or
SWEEP
GENERATOR
CONNECTIONS
FREQUENCY
Tuning
capacitor
Tuning
capacitor
CT6
(AM
OSC
(*
1)Cement
antenna
bobbin
with
wax
after
completing
alignment.
5.
Set
mode
switch
to
stereo.
6.
Set
power
source
voltage
to
15
V
DC.
7.
Output
of
signal
generator
should
be
no
higher
than
necessary
to
obtain
an
output
reading.
INDICATOR
RADIO
DIAL
(ELECTRONICS
SETTING
VOLTMETER
REMARKS
‘ADJUSTMENT
“|
T2
(AM
IFT)
L7
(AMOSC
Coil)
or
SCOPE)
AM-IF
ALIGNMENT
Point
of
non-
interference.
(on/
about
600
kHz)
Output
meter
across
voice
coil
Adjust
for
maximum
output.
MW-RF
ALIGNMENT
Adjust
for
maximum
output.
Adjust
for
maximum
output.
Adjust
L4
by
moving
coil
bobbin
along
ferrite
core.
Adjust
for
maximum
output.
Repeat
steps
(2)~(5).
(*1)L4
(AM
ANT
Coil)
CT3
(AM
ANT
Trimmer)
INDICATOR
(ELECTRONICS
VOLTMETER
or
SCOPE)
FM-IF
ALIGNMENT
Connect
vert.
amp.
of
scope
to
test
point
Y
.
Negative
side
to
test
point
7
.
RADIO
DIAL
ADJUSTMENT
REMARKS
SETTING
Point
of
non-
interference.
(on/
about
90
MHz)
Adjust
for
maximum
amplitude.
(Refer
to
fig.
6).
T1
(FM
1st
IFT)
Adjust
for
maximum
amplitude.
(Refer
to
fig.
7).
T3
(FM
2nd
IFT)
(3)
Connect
to
test
point
109.2
MHz
W
through
FM
dummy
antenna.
Negative
(4)
side
to
test
point
Y
.
(5)
90
MHz
FM
FM
FM
FM
(6)
po
106
MHz
(*
2)
Three
output
responses
will
be
present:
proper
tuning
is
the
center
frequency.
FM-RF
ALIGNMENT
Output
meter
Variable
:
L3
(FM
OSC
(
*
2)
Adjust
for
maxi-
capacitor
across
‘
fully
closed
voice
coil
ce)
EOD
Variable
CT2
(FM
OSC
"
capacitor
ss
anoss
er)
fully
open
mesma
|_|
:
(
*
2)
Adjust
for
maxi-
CT1
(FM
ANT
mum
output.
Trimmer)
Repeat
steps
(3)~(6).

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