Elenco SEE AMFM108CK - Manual (Page 48)

With an alignment tool or screwdriver turn coils T1,
T2 and T3 fully counter-clockwise. DO NOT FORCE
THE COILS ANY FURTHER. Turn each coil in about
1 1/4 to 1 1/2 turns.
Use the earphone provided for best results. Switch
to the FM position. Connect your VOM to the circuit
as shown in Figure 43. Turn the radio ON and tune
the radio to a weak station. It is best to keep the
volume at a low level. Adjust T1 for the minimum
voltage on your VOM. Reduce the volume if
necessary. Adjust T2 for minimum voltage on your
VOM and reduce the volume control if necessary.
Adjust T3 for minimum voltage on your VOM and
reduce the volume control if necessary. As you
adjust the coils you should hear less distortion and
noise. Repeat this procedure until the FM IF gain is
optimized. This process peaked the FM IF amplifier
to their maximum gain.
DETECTOR ALIGNMENT
Adjust T4 for minimum voltage on your VOM. Adjust
T5 for minimum distortion. Repeat these 2 steps
until the ratio detector alignment is optimized.
OSCILLATOR ALIGNMENT
Tune the radio to a known station around 90MHz.
Once a station is found and its broadcast frequency
is known, rotate the dial until the white pointer is
aligned with that stations frequency on the dial.
Using the “magic wand”, place the brass end near
coil L3. Refer to Figure 44.
If the station is heard, this means that L3 needs less
inductance. Carefully pull apart L3 until the station is
heard. Place the iron end near L3. If the station is
heard, this means that L3 needs more inductance.
Carefully press together L3 until the station is heard.
Pulling apart or pressing together L3 just a small
amount will have a great effect on the coils resonant
frequency. Repeat this step until the pointer is
aligned to the station’s frequency. Tune the radio to
a station around 106MHz. Once a station is found
and its broadcast frequency is known, rotate the dial
until the white pointer is aligned with that station’s
frequency on the dial. Place the brass end of the
“magic wand” near L3. If the station is heard, it
means that L3 needs more capacitance. Carefully
adjust the FM oscillator trimmer (as shown in Figure L,
page 23), on the back of the gang until the station
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ALIGNMENT WITH NO TEST EQUIPMENT
IF ALIGNMENT
Figure 44
“Magic Wand”
RF Coil
Spread apart the coil for less inductance
Press the coil together for more inductance
TP15
V
COM V
With an alignment tool or screwdriver turn coils T1,
T2 and T3 fully counter-clockwise. DO NOT FORCE THE COILS ANY FURTHER. Turn each coil in about
1 1/4 to 1 1/2 turns.
Figure 43