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ICF-CDK70
13
SECTION 5
ELECTRICAL ADJUSTMENTS
TUNER SECTION
0 dB=1
µV
[AM]
Setting:
Function: RADIO
Band: 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
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.
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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