Electrical Adjustments - Sony ICF-M410L Service Manual

MW/LW SECTION
BAND : AM
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM SECTION
BAND : FM
FM RF signal
generator
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
set
Speaker terminal (EPJ301)
SECTION 3

ELECTRICAL ADJUSTMENTS

Put the lead-wire
antenna close to
the set.
0.01µF telescopic
antenna
terminal
level meter
16 Ω
+
–
• 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.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T15
MW/LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
LW CT4
MW L4
MW/LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
ANT102
LW
CT2
ANT102
MW
CT1
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L6
CT3
[Adjustment Location : Main board] (Component side)
T1
AM IF
MAIN BOARD
adjustment
(Component side)
L4
MW FREQUENCY
COVERAGE
adjustment
ICF-M410L
450 kHz
153 kHz
531 kHz
162 kHz
243 kHz
603 kHz
1,404 kHz
87.5 MHz
108 MHz
L6,CT3
FM TRACKING
CT1
adjustment
MW TRACKING
adjustment
CT2
LW TRACKING
adjustment
CT4
LW FREQUENCY
COVERAGE
adjustment
5