Electrical Adjustments - Sony ICF-CDK70 Service Manual

0 dB=1 µV
TUNER SECTION
[AM]
Setting:
Function: RADIO
Band: AM
Put the lead-wire
AM RF signal
antenna close to
generator
the set.
set
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
[FM]
Setting
Function: RADIO
Band: FM
TU board
FM RF signal
TP (ANT)
generator
0.01 F
75 kHz frequency
deviation by 1 kHz
TU board
signal
TP (GND)
Output level:
as low as possible
TU board
100 k
TP (VT)
TP (GND)
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be fi nally done by the trimmer
capacitors.
SECTION 5

ELECTRICAL ADJUSTMENTS

MAIN board
CN303 pin
level meter
6
+
–
MAIN board
CN303 pin
MAIN board
CN303 pin
level meter
6
+
set
–
MAIN board
CN303 pin
digital voltmeter
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display
L4 530 kHz
Confi rmation 1,710 kHz
AM TRACKING ADJUSTMENT
Adjustment for a maximum reading on level meter
L3
CT3
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display
L2 108 MHz
Confi rmation 87.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
CT1
Adjustment Location: TU board (See page 14)
ICF-CDK70
450 kHz
Reading on Digital
Voltmeter
1.0 ± 0.1 V
5.3 ± 0.4 V
620 kHz
1,400 kHz
10.7 MHz
Reading on Digital
Voltmeter
3.0 ± 0.2 V
1.3 ± 0.2 V
87.5 MHz
108 MHz
13