Sony ICF-M410L User manual

ICF-M410L

AEP Model

SERVICE MANUAL

FM STEREO/MW/LW

PLL SYNTHESIZED RADIO

Sony Corporation

Personal Audio Company

Shinagawa Tec Service Manual Production Group

9-873-156-01

2001E1600-1

SPECIFICATIONS

Ver 1.0 2001. 05

Speaker: 7.7 cm (3

⁄

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 ×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 (17.8oz) incl. batteries

Design and specifications are subject to change

without notice.

TABLE OF CONTENTS

ICF-M410L

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

ICF-M410L

This section is extracted

from instruction manual.

SECTION 1

GENERAL

Telescopic Antenna

TUNE/TIME SET

VOL

DC IN 4.5V

vjack

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.

1To stop flashing of the display, press

CLOCK (mb/CLOCK for ICF-M410S).

2While 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

ICF-M410L SECTION 2

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.

Screw (+PTPWH 2

Screw (+B 3

Five s

crews

(+BTP 3

14)

Two s

crews (+P 2

Two s

crews

(+P 2

crew (+PTPWH 2.6

ide panel (L)

ide panel (R)

Arm

(jog)

JACK board

KEY board

MAIN board

Knob

Antenna, telescopic

Cabinet rear

Claws

Remove the Claws

Knob (jog)

Plate, contact

Cabinet (front) sub assy

ICF-M410L

SECTION 3

ELECTRICAL ADJUSTMENTS

BAND : AM

•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.

MW/LW SECTION

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

0.01µF

FM RF signal

generator

telescopi

antenna

terminal

75kHz (100%) amplitude modulation

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.

T15 450 kHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L6 87.5 MHz

CT3 108 MHz

BAND : FM

MAIN BOARD

(Component side)

CT2

LW TRACKING

adjustment

CT4

LW FREQUENCY

COVERAGE

adjustment

MW FREQUENCY

COVERAGE

adjustment

AM IF

adjustment

L6,CT3

FM TRACKING

adjustment CT1

MW TRACKING

adjustment

MW/LW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

LW ANT102 162 kHz

CT2 243 kHz

MW ANT102 603 kHz

CT1 1,404 kHz

MW/LW FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

LW CT4 153 kHz

MW L4 531 kHz

ICF-M410L SECTION 4

DIAGRAMS

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. p: pF.

50 WV or less are not indicated except for electrolytics

and tantalums.

• All resistors are in Ωand 1/4W or less unless otherwise

specified.

•f: internal component.

•C: panel designation.

•A: B+ Line.

•H: adjustment for repair.

• Voltages are dc with respect to ground under no-signal

(detuned) conditions.

no mark : FM

∗: Impossible to measure

• Voltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal produc-

tion tolerances.

• Signal path.

F: FM

f: AM (LW/MW)

The components identified by mark 0

or dotted line with mark 0are critical for

safety.

• Waveform

2Vp-p

IC101 wf (XOUT)

1.4V

Note on Printed Wiring Board:

•X: parts extracted from the component side.

•: Pattern from the side which enables seeing.

ICF-M410L

4-1. BLOCK DIAGRAM

: FM

B.P.F1 3

BPF1

BUFFER

FM RF IN

FM RF

FM OSC

AM RF IN

6 AM OSC

L6 L7

FM RF

L3 FM OSC

9REG

15 18

IF OUT

DISCRI

7AFC

CF2 CF3

CF1

CF4

10.7MHz

450kHz450kHz IFT

FM IF IN

AM IF IN

16 BAND

CT3

METER

DET

AF IN Q7

AF OUT

B +

VOL 5Q4

RV1

IC1

FM/AM FRONT-END,IF,DET,AF AMP

ANT101

(TELESCOPIC)

ANT102

(FERRITE-R0D) CT1

CT2

CT4

L4 MW OSC

BAND(MW/LW)

BAND(FM/AM)

SP301

( SPEAKER )

IC2

3.0V REG

VOUT VIN

Q8,Q9

VDET

VCOL

VCOH

GND

BAND(FM/AM)

BAND(MW/LW)

MUTE

BEEP

B +

POWER

BAND(FM/AM)

BAND(MW/LW)

MUTE

BEEP

POWER

CN1

W101

CN2

W102

VDD 23

Q101

AMP

VCOL

VCOH

DC/DC

CONVERTER TUNING

CONTROL

Q153,Q154,T101 Q151,Q152

IC102 +3.2V

VOLTAGE DET.

IC103 +2.5V

VOLTAGE DET.

BATT LOW

LCD0

LCD14

COM0

COM3

KEY SCAN0

KEY SCAN3

KEY RET0

KEY RET3

51 INT

VDD

S115

HOLD

XOUT

XIN

X101

75kHz

IC101

DIGITAL TUNING SYSTEM CONTROL

S101-S114

KEY

MATRIX

LCD101

Signal Path

VDD

VOUT VDD

DRY BATTERY

SIZE "AA"

(IEC DESIGNATION R6)

3PCS, 4.5V

(+13V)

TRACKING

MW FREQUENCY

COVERAGE

LW FREQUENCY

COVERAGE

TRACKING

DCJ301

EPJ301

DC IN 4.5V

EARPHONE )

(

VOL

MAIN BOARD

JACK BOARD

KEY BOARD

AM IF

OFF

ICF-M410L

4-2. SCHEMATIC DIAGRAM

IC B/D

•See page 6 for Wavefoms. •See page 10 for IC Pin Function Description.

•See page 10 for IC Block Diagrams.

ICF-M410L

4-3. PRINTED WIRING BOARD

IC101

IC102

IC103

IC2

IC1

MIN

MAX

VOL

RV1

JW3

C32

1-681-635-

JW1

JW2

CN1 CN2

JW5JW4

JW6

CF1

C22

C23

C27

C29

JW7

15 16

130

JW8

CF4

C18

JW11

JW10

CT3

C16

BPF1

JW12

CT2

ANT101

TELESCOPIC

ANTENNA

MAIN BOARD

(11)

JW9 CF2

CF3

ANT102

MW/LW

FERRITE-ROD ANTENNA

RED

NTL

GRN

BLK

CT1 CT4

JACK BOARD

SP301

EPJ301

DCJ301

DC IN 4.5V

C302

JW301

W301

11-681-636-

DRY BATTERY

SIZE "AA"

(IEC DESIGNATION R6)

3PCS, 4.5V

(11)

TP22

(RFGND)

TP19

(VT)

TP11

(MW/LW)

TP13

(BEP)

TP12

(MUTE)

TP10

(FM/AM)

TP9

(POWER)

TP20

(MET)

TP8

(+B)

TP21

(+B)

TP1

(GND)

TP18

(VCOH)

TP2

(DET)

TP6

(GND)

TP7

(SP+)

TP5

(GND)

TP4

(VDD)

TP15

(VDET)

TP3

(+B)

TP16

(3V)

TP17

(RFGND)

TP14

(VCOL)

S102

POWER

S115

HOLD

S106

S105

S104

S108

S103

SLEEP

S111

PRESET

TUNING

S112

PRESET

TUNING

S110

PRESET

TUNING

S113

PRESET

TUNING

S114

PRESET

TUNING

S107

STANDBY

S101

CLOCK

S109

BAND SELECT/ PRESET

TP112

(VCOH) TP107

(VCOL)

TP109

(GND)

TP113

(RFGND)

TP114

(VT)

TP110

(3V)

TP108

(VDET)

TP101

(+B)

TP111

(GND)

TP106

(BEEP)

TP116

(13V)

TP115

(ED)

TP102

(POWER)

TP103

(MUTING)

TP104

(MW/SW)

TP105

(FM/AM)

LCD101

1510 15 19

14 15

JW122

JW111

JW112

JW113

JW114

JW115

JW116

JW103

JW119

JW18

JW117

JW110

JW109

JW108

JW102

JW101

JW107

JW106

JW105

JW104

JW120

X101

T101

C123

C156

C153

W101

W102

1-681-634-

(11)

KEY BOARD

C119

R140

R137

R101

C122

C118

R136

R134

R141

R133

R132

R139

R131

R130

R129

R128

C117

R127

R126

R125

R124

R123

R122

R121

R120

R119

R118

R117

R116

R138

C116

C114

C113

C111

C112

C110

C115

R115

C109

R108

R105

R151

C158

C152

C131

R152 C151

R142 C132

C121

Q151

Q152

Q101

R147

C135

R148

C136

R146

JW121

R142

R149 C137

CJ101 C159

CJ102

CJ107

C134

C133

R144

R143

C120

C121

Q154

Q153

R154

R158

C157

R157

D102

D101 C155

R155

R156

C154

L101

R112

R111

C108

C104

C105

R109

C107

C104

C102

R106

C101

R110

JC106

JC105

R107

C103

R152

R104

R102

R103

JC103

ON OFF

34567891011

Ref. No. Location

D101 D-4

D102 D-4

IC101 B-2

IC102 B-4

IC103 B-3

Q101 B-3

Q151 B-3

Q152 B-3

Q153 C-4

Q154 D-4

•Semiconductor

Location

KEY BOARD

Ref. No. Location

D1 G-1

D2 G-3

D3 F-4

D4 G-4

D5 G-6

D6 F-7

D7 G-7

D8 G-6

IC1 G-5

IC2 G-7

Q1 F-3

Q2 G-5

Q3 F-3

Q4 H-2

Q5 F-6

Q7 G-6

Q8 G-7

Q9 F7

•Semiconductor

Location

MAIN BOARD

1010

ICF-M410L

4-4. IC PIN FUNCTION DESCRIPTION

•IC101 uPD17072GB-565-1A7(DIGITAL TUNING SYSTEM CONTROL)

4-5. IC BLOCK DIAGRAM

IC1 CXA1019S

Pin No.

35-49

I/O

—

Description

For pull-up of INITIAL, L:CE = at L

Radio power control signal output.

Muting signal output.

“Band select signal output. L:MW, H:LW/SW”

“Band select signal output. L:FM/TV, H:AM”

Key source signal output.

Key return signal input.

Not used.

Ground.

Error signal output.

AM VCO (local oscillation) frequency input.

FM VCO (local oscillation) frequency input.

Regulater for PLL output.

Power supply (+3V).

Pin for connecting crystal resonator for system clock.

Regulater for PLL output.

LCD drive voltage output.

Pin for capacitor connection for LCD drive voltage.

LCD drive voltage output.

LCD common signal output.

LCD segment signal output.

Chip select emable input.

Hold input. L:ON

BEEP signal output.

Low voltage detect signal input.

Not used.

Connected to L.

Not used.

Pin Name

VOUT

POWER

MUTING

BAND(MW/SW)

BAND(FM/AM)

KEY SCAN0

KEY SCAN1

KEY SCAN2

KEY SCAN3

KEY RET0

KEY RET1

KEY RET2

KEY RET3

GND

VCOL

VCOH

REG 0

VDD

X OUT

X IN

REG 1

REG LCD0

CAP LCD0

CAP LCD1

REG LCD1

COM 0

COM 1

COM 2

COM 3

LCD 0 - 14

INT

BEEP

BAT LOW

INITIAL

12 3 45 6 7 8 9 10 1514131211

DISCRIMINATOR

AF POWER AMP AM FE FM IF

TUNING

METER

AM IF DET AGC

FM FE

23 22 21 202425 19 18 17 1629 28 27 2630

GND

AF OUT

VCC

RIPPLE

FILTER

AF IN

DET OUT

AFC AGC

IF GND

METER

N.C

FM IF IN

AM IF IN

FM/AM BAND

SELECT

FM/AM

IF OUT

FE GND

N.C

AM RF IN

FM RF

REG OUT

FM OSC

FM RF IN

AFC

AM OSC

VOL

FM DISCRI

GND

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