Panasonic RX-FS50 - Measurements and Adjustments - Tuner Section; Alignment Instructions and General Tips; IF and RF Alignment Procedures

| RX-FS50
Measurements and Adjustments
[ Tuner Section ]
¢ ALIGNMENT INSTRUCTIONS
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
1.
Set
power
source
voliage
to
9V
DC.
5.
Set
FM
MODE/BP
switch
to
MONO/T.
2. Set volume control to maximum. 6. Set FINE TUNING to center.
3.
Set
band
switch
to
FM,
MW,
SWi
or
SW2.
7.
Output
of
signal
generator
should
be
no
higher
than
necessary
to
4,
Set
selector
switch
io
TAPE
or
RADIO.
obtain
an
output reading.
e AM - IF ALIGNMENT
Signal
Generator
or
bs
a
Indicator
.
Sweep
Generator
Radio
Bia!
(Electronic
Volimeter
poliestnett
Remarks
Setting : (Shown in Fig.1
Connections
Frequency
or
Oscilloscope)
9.1)
Fashion a loop of Point of non- Headphones Jack(32Q)
. 455 kHz 5 ; ‘
several tums of wire intereference. Fabricate the plug as shown in : ;
and
radiate
signal
30%
Mod.
(on/about
Fig.2
and
then
connect
the
Adjust
for
maximum
output.
: : at 400 Hz lead wires of the plug to the
into loop of receiver. 600kHz) measuring instrument.
o MW - RF ALIGNMENT
(GU)
....
511
KHZ
}
Tuning
capacitor
L8
(GC)
....
514
KHZ
|
fully
closed.
(MW
OSC.
Coil)
+3
KHz
Adjust for maximum output.
(GU)....1650
kHz
|
Tuning
capacitor
CT6
+5 kHz
[4] 3-1 Adjust for maximum output.
o
550
kHz
Tune
to
signal
(MW
ANT.
Goi)
Adjust
L3-1
by
moving
coil
j bobbin along the ferrite core.
Adjust for maximum output.
F CT5 : :
1500
kHz
Tune
to
signal
(MW
ANT.
Trimmer)
Adjust
for
maximum
output.
[*1] Fix antenna coil with wax after completing alignment.
e SWi - RF ALIGNMENT
Tuning capacitor L9
fully closed. (SW1 OSC. Coil) | Adiust for maximum output.
2.249 MHz
Tuning
capacitor
VC1-3
7231
MFZ
|
fully
opened.
(SW1
ANT.
VC1)
Adjust for maximum output.
Adjust for maximum output.
Adjust L3-2 by moving coil
bobbin along the ferrite core.
[4] L3-2
Tune to signal (SW1 ANT. Coil)
vC1-4
Tune to signal (SW1 ANT. VC1) Adjust for maximum output.