Read Sony ICF-M410S Service Manual online
5
ICF-M410S
SECTION 3
ELECTRICAL ADJUSTMENTS
BAND : MW/SW
• Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
FM SECTION
[Adjustment Location : Main board] (Component side)
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
AM RF signal
generator
generator
0.01
µ
F
FM RF signal
generator
generator
telescopic
antenna
terminal
antenna
terminal
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
by 1kHz signal.
Output level : as low as possible
16
Ω
set
+
–
level meter
Speaker terminal (EPJ301)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
621 kHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L17
87.5 MHz
CT3
108 MHz
BAND : FM
MAIN BOARD
1
15
16
30
IC1
(Component side)
L4,CT1
SW TRACKING
adjustment
SW TRACKING
adjustment
L17,CT3
FM TRACKING
adjustment
FM TRACKING
adjustment
T1
AM IF
adjustment
AM IF
adjustment
CT2
MW TRACKING
adjustment
MW TRACKING
adjustment
L11
MW FREQUENCY
COVERAGE
adjustment
MW FREQUENCY
COVERAGE
adjustment
L9
SW FREQUENCY
COVERAGE
adjustment
SW FREQUENCY
COVERAGE
adjustment
MW/SW SECTION
MW/SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
SW
L4
5,800 kHz
CT1
15,900 kHz
MW
ANT102
621 kHz
CT2
1,404 kHz
MW/SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
SW
L9
5,800 kHz
MW
L11
531 kHz
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