Read Sony ICF-C620L Service Manual online
– 9 –
5-2. RADIO SECTION
MW/LW
Setting :
Function selector : RADIO ON
BAND switch
Function selector : RADIO ON
BAND switch
: MW or LW
VOLUME control : minimum
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
MW FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
CT2
520 kHz
1,650 kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1-1
CT1
600 kHz
1,400 kHz
LW FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on level meter.
(confirmation)
TC2
145 kHz
261 kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1-2
TC1
160 kHz
240 kHz
FM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT4
86.5 MHz
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
(confirmation)
CT3
86.5 MHz
109.5 MHz
30% amplitude
modulation by
400 Hz signal
modulation by
400 Hz signal
AM rf signal
generator
generator
speaker terminal
level meter
(range : 0.5 – 5 V ac)
set
FM rf signal
generator
generator
22.5 kHz frequency deviation
by 400 Hz signal
output level : as low as possible
by 400 Hz signal
output level : as low as possible
to FM antenna
terminal
terminal
0.01
µ
F
set
speaker terminal
level meter
(range : 0.5 – 5 V ac)
• Repeat the procedures is each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
Adjustment Location : main board (component side)
FM
Setting :
Function selector : RADIO ON
BAND switch
Function selector : RADIO ON
BAND switch
: FM
VOLUME control : minimum
CT4
L4
L4
L2
CT2
CT2
CT3
FM
TRACKING
ADJ
TC1
L1-2
L1-2
LW
TRACKING
ADJ
FM FREQUENCY
COVERAGE ADJ
COVERAGE ADJ
MW FREQUENCY
COVERAGE ADJ
COVERAGE ADJ
L1-1 CT1
MW
TRACKING
ADJ
TC2
LW
FREQUENCY
COVERAGE ADJ
T1
AM IF
ADJ
Put the lead-wire
antanna close to
the set.
antanna close to
the set.
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