Sony Dream Machine ICF-C723L, Руководство по обслуживанию

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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