ICF-C723, ICF-C723L - Sony Audio Service Manual (repair manual). Page 6

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– 6 –
 AM Section
Band button : AM (ICF-C723)
: MW or LW (ICF-C723L)
Volume
: MAX
 FM Section
Band button : FM
Volume
: MAX

[MAIN BOARD] (Conductor side)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
(            ) : AEP, UK, Italian, Australian, E model only
AM IF ALIGNMENT
Adjust for a maximum reading on level meter.
T1
455kHz
AM <MW> FREQUENCY COVERAGE  ADJUSTMENT
Adjust parts
Frequecy display
Reading on digital
voltmeter
L6
530kHz  (531kHz)
2.5 ± 0.1V (ICF-C723)
2.65 ± 0.1V (ICF-C723L)
Less than 11.0V
confirmation
1,710kHz (1,602kHz)
Standard 9.5V
(Less than 10.0V)
(Standard 9.0V)
AM <MW> TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 :ICF-C723
 L3–1 :ICF-C723L
580kHz
(621kHz)
CT1
1,490kHz
(1,404kHz)
ICF-C723L
LW FREQUENCY COVERAGE  ADJUSTMENT
Adjust parts
Frequecy display
Reading on digital
voltmeter
confirmation
153kHz
More than 2.2V
(Standard 3V)
CT4
279kHz
9.0 ± 0.1V
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 – 2
162kHz
CT2
243kHz
FM FREQUENCY COVERAGE  ADJUSTMENT
Adjust parts
Frequecy display
Reading on digital
voltmeter
L5
87.5MHz
3.0 ± 0.1V
confirmation
108.0MHz
10 ± 1V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
87.5MHz
CT3
108MHz

Adjustment Location  : Main board (See page 8)
FM RF signal
generator
22.5kHz frequency 
deviation by 400Hz signal.
Output level : 
as low as possible
set
FM ANT IN
0.01  F
µ
set
8
Ω
speaker terminal
level meter
SECTION 3
ELECTRICAL ADJUSTMENTS
AM  RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to 
the set.
W705
JW13
C15
C55
1
2
3
4
5
6
digital 
voltmeter

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