Read Sony CFD-121 Service Manual online
– 11 –
FM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on VTVM.
L2
CT2
86.5 MHz (87.0 MHz)
109.5 MHz (108.3 MHz)
<87.35 MHz> ((64.0 MHz))
<108.25 MHz> ((109.5 MHz))
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L1
CT1
86.5 MHz (87.0 MHz)
109.5 MHz (108.3 MHz)
<87.35 MHz> ((64.0 MHz))
<108.25 MHz> ((109.5 MHz))
AM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on VTVM.
L4
CT4
520 kHz <516.5 kHz>
1,780 kHz <1,630 kHz>
<<1,680 kHz>>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L3
CT3
620 kHz
1,400 kHz
( ) : AEP, UK model
< > : Italian model
(( )) : East European model
<< >> : AEP, UK, East European model
Adjustment Location : See page 12.
telescopic antenna
input terminal
input terminal
set
0.01
µ
F
FM RF signal
generator
generator
22.5 kHz frequency
deviation by 400 Hz signal
Output level : as low as possible
deviation by 400 Hz signal
Output level : as low as possible
AM RF signal
generator
generator
30 % amplitude
modulation by 400 Hz signal
Output level : as low as possible
modulation by 400 Hz signal
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
set
phones jack
32
Ω
3-2. TUNER SECTION
• FM Section
Setting :
FUNCTION switch : FM
FUNCTION switch : FM
• AM Section
Setting :
FUNCTION switch : AM
FUNCTION switch : AM
• Connecting VTVM (FM and AM)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
by the trimmer capacitors.
0dB=1µV
VTVM
(range: 0.5-5 V ac)
(range: 0.5-5 V ac)
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