ICF-CDK70
13
SECTION 5
ELECTRICAL ADJUSTMENTS
TUNER SECTION
0 dB=1 µV
[AM]
Setting:
Function: RADIO
Band: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
6 7
MAIN board
CN303 pin
MAIN board
CN303 pin
[FM]
Setting
Function: RADIO
Band: FM
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
+
–
level meter
MAIN board
CN303 pin
MAIN board
CN303 pin
set
6 7
0.01 F
TU board
TP (GND)
TU board
TP (ANT)
digital voltmeter
TP (VT)
TP (GND)
100 k 7
TU board
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be fi nally done by the trimmer
capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1 450 kHz
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display
Reading on Digital
Voltmeter
L4 530 kHz 1.0 ± 0.1 V
Confi rmation 1,710 kHz 5.3 ± 0.4 V
AM TRACKING ADJUSTMENT
Adjustment for a maximum reading on level meter
L3 620 kHz
CT3 1,400 kHz
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2 10.7 MHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display
Reading on Digital
Voltmeter
L2 108 MHz 3.0 ± 0.2 V
Confi rmation 87.5 MHz 1.3 ± 0.2 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 87.5 MHz
CT1 108 MHz
Adjustment Location: TU board (See page 14)
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