Electrical Adjustment - Sony ICF-C113 Service Manual

AM Section
Band button : AM (ICF-C113/C113V)
: MW or LW (ICF-C113L)
Volume : MAX
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM Section
Band button : FM
: TV (ICF-C113V)
Volume : MAX
FM RF signal
generator
22.5kHz frequency
deviation by 400Hz signal.
Output level :
as low as possible
set
speaker terminal
[MAIN BOARD] (Component side)
JW9 (VT)
L6
SECTION 3
ELECTRICAL ADJUSTMENTS
Put the lead-wire
antenna close to
the set.
0.01 F
set
FM ANT IN
level meter
8 Ω
digital
voltmeter
JW5 (GND)
CT7
SW1
• 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, Swiss model only
AM IF ALIGNMENT
Adjust for a maximum reading on level meter.
T2
AM <MW> FREQUENCY COVERAGE ADJUSTMENT
Adjust parts Frequecy display
L6 530kHz (531kHz)
confirmation 1,710kHz (1,602kHz)
AM <MW> TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 :ICF-C113/C113V
L3–1 :ICF-C113L
CT3
ICF-C113L
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust parts Frequecy display
CT7
confirmation
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 – 2
CT2
ICF-C113/C113L
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts Frequecy display
L5
confirmation
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 – 2
CT5
– 5 –
450kHz
Reading on digital
voltmeter
2.65 ± 0.1V (ICF-C113/C113V)
2.65 ± 0.1V (ICF-C113L)
Less than 10.0V
Standard 9.5V
(Less than 9.5V)
(Standard 9.0V)
580kHz (621kHz)
1,490kHz (1,404kHz)
Reading on digital
voltmeter
More than 2.25V
153kHz
( ± 0.05V)
Less than 9.5V
279kHz
(Standard 9.0V)
162kHz
243kHz
Reading on digital
voltmeter
3.5 ± 0.1V
87.5MHz
Less than 11.8V
108.0MHz
(Standard 10.5V)
87.5MHz
108.0MHz