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ICF-M410S
AEP Model
E Model
SERVICE MANUAL
FM STEREO/SW/MW
PLL SYNTHESIZED RADIO
Sony Corporation
Personal Audio Company
Shinagawa Tec Service Manual Production Group
9-873-157-01
2001E1600-1
© 2001.5
SPECIFICATIONS
Ver 1.0 2001. 05
Speaker: 7.7 cm (31/8 inches) 8
Power output: 200 mW (at 10 % harmonic distortion)
Output: v (earphone) jack (ø3.5 mm minijack)
Power requirements: 4.5 V DC, three R6 (size AA) batteries
External power source: DC IN 4.5 V
Dimensions:
Approx. 205
× 104 × 40.5 mm (w/h/d)
(Approx. 8 1/3
× 4 1/8 × 1 5/8 inches) not incl. projecting
parts and controls
Approx. 212
× 104 × 42.5 mm (w/h/d)
(Approx. 8 3/8
× 4 1/8 × 1 11/16 inches) incl. projecting
parts and controls
Mass: Approx. 504 g (17.8 oz ) incl. batteries
Design and specifications are subject to change
without notice.


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2
TABLE OF CONTENTS
ICF-M410S
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of soldering iron around 270°C
during repairing.
· Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
· Be careful not to apply force on the conductor when soldering
or unsoldering.
1. GENERAL ·································································· 3
2. DISASSEMBLY ························································· 4
3. ELECTRICAL ADJUSTMENTS ····························· 5
4. DIAGRAMS
4-1.
Block Diagram ····························································· 7
4-2.
Schematic Diagram ······················································ 8
4-3.
Printed Wiring Board ··················································· 9
4-4.
IC Pin Function Description ······································ 10
4-5.
IC Block Diagram ······················································ 10
5. EXPLODED VIEWS ················································ 11
6. ELECTRICAL PARTS LIST ·································· 12


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3
ICF-M410S
This section is extracted
from instruction manual.
SECTION 1
GENERAL
*
Telescopic Antenna
TUNE/TIME SET
VOL
DC IN 4.5V
v
jack
Setting the Clock
The display will flash "0:00" when the batteries are
installed or the AC power adaptor is plugged in for
the first time.
The clock can be adjusted when the radio is off.
1 To stop flashing of the display, press
CLOCK (mb/CLOCK for ICF-M410S).
2 While holding down CLOCK, turn
TUNE/TIME SET to set the clock to the
current time.
When you turn the control knob a little to
or
, the clock digits move forward or back one
by one, and when you turn the control knob
further to
or
, the clock digits move
rapidly.
When you release CLOCK, the clock starts
operating, and ":" starts flashing.
24-hour system : "0:00" = midnight, "12:00" =
noon


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4
ICF-M410S
SECTION 2
DISASSEMBLY
Note :
Follow the disassembly procedure in the numerical order given.
9
Screw (+PTPWH 2
× 8)
1
Screw (+B 3
× 6)
3
Five screws
(+BTP 3
× 14)
q;
Two screws (+P 2
× 8)
qf
Two screws
(+P 2
× 8)
6
Screw (+PTPWH 2.6
× 8)
7
Side panel (L)
qs
Side panel (R)
qd
Arm (jog)
8
JACK board
qg
KEY board
qj
MAIN board
qh
Knob
2
Antenna, telescopic
Cabinet rear
4
Claws
qa
Claws
Remove the Claws
Remove the Claws
Knob (jog)
5
Plate, contact
Cabinet (front) sub assy


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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.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
AM RF signal
generator
0.01
µF
FM RF signal
generator
telescopic
antenna
terminal
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
16
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
L17,CT3
FM TRACKING
adjustment
T1
AM IF
adjustment
CT2
MW TRACKING
adjustment
L11
MW FREQUENCY
COVERAGE
adjustment
L9
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