Sony ICFM-410-S Service manual
ICF-M410S
SERVICE MANUAL
Ver 1.0 2001. 05
SPECIFICATIONS
Speaker: 7.7 cm (31⁄8 inches) 8 Ω
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 ×
parts and controls
Approx. 212 × 104 × 42.5 mm (w/h/d)
(Approx. 8 3/8 × 4 1/8 ×
parts and controls
Mass: Approx. 504 g (17.8
Design and specifications are subject to change
without notice.
1 5/8 inches) not incl. projecting
1 11/16 inches) incl. projecting
) incl. batteries
oz
AEP Model
E Model
9-873-157-01
2001E1600-1
© 2001.5
FM STEREO/SW/MW
PLL SYNTHESIZED RADIO
Sony Corporation
Personal Audio Company
Shinagawa Tec Service Manual Production Group
ICF-M410S
TABLE OF CONTENTS
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
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.
2
Telescopic Antenna
SECTION 1
GENERAL
*
ICF-M410S
This section is extracted
from instruction manual.
v jack
DC IN 4.5V
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
rapidly.
When you release CLOCK, the clock starts
operating, and “:” starts flashing.
or , the clock digits move
TUNE/TIME SET
VOL
24-hour system : “0:00” = midnight, “12:00” =
noon
3
ICF-M410S
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
qj
9
qg
KEY board
qf
Two s
(+P 2
Screw (+PTPWH 2
crews
×
8)
Remove the Claws
×
8)
MAIN board
qh
Knob
Remove the Claws
4
Claws
2
Antenna, telescopic
Cabinet rear
1
Screw (+B 3
×
6)
Cabinet (front) sub assy
qd
Arm
qs
S
ide panel (R)
(jog)
7
S
ide panel (L)
qa
Claws
8
JACK board
q;
Two s
5
Plate, contact
6
S
crew (+PTPWH 2.6
crews (+P 2
Knob (jog)
×
8)
3
Five s
×
crews
8)
(+BTP 3
×
14)
4
SECTION 3
c
ELECTRICAL ADJUSTMENTS
ICF-M410S
MW/SW SECTION
BAND : MW/SW
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
Put the lead-wire
antenna close to
the set.
0.01µF
telescopi
antenna
terminal
• 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.
T1 621 kHz
MW/SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
SW L9 5,800 kHz
MW L11 531 kHz
MW/SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
SW
MW
L4 5,800 kHz
CT1 15,900 kHz
ANT102 621 kHz
CT2 1,404 kHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L17 87.5 MHz
CT3 108 MHz
[Adjustment Location : Main board] (Component side)
set
level meter
16 Ω
+
–
Speaker terminal (EPJ301)
MAIN BOARD
(Component side)
L17,CT3
T1
AM IF
adjustment
16
30
L9
SW FREQUENCY
COVERAGE
adjustment
FM TRACKING
adjustment
15
IC1
1
L4,CT1
SW TRACKING
adjustment
CT2
MW TRACKING
adjustment
L11
MW FREQUENCY
COVERAGE
adjustment
5
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