Sony ICF-SW35 Manuale utente

– 1 –

SERVICE MANUAL

US Model

Canadian Model

AEP Model

E Model

ICF-SW35

FM STEREO/SW/MW/LW

PLL SYNTHESIZED RECEIVER

Circuit system

FM: Super heterodyne

LW/MW/SW: Dual conversion super heterodyne

Frequency range

FM: 76.00 - 108.00 MHz

87.50 - 108.00 MHz*1

SW: 2250 - 26100 kHz*2

3850 - 26100 kHz*3

MW: 530 - 1710 kHz

530 - 1620 kHz

LW: 150 - 285 kHz

Speaker

Approx. 66 mm (2 1/8 in.) diameter, 8 Ohms

Maximum output

240 mW (at 10 % harmonic distortion)

Output

i(headphones) jack (ø3.5 mm stereo mini jack)

16 Ohms

Power requirements

DC 4.5 V, three R6 (size AA) batteries

External power source

DC IN 4.5 V

Battery Life (approximate hours)

Sony R6 Sony LR6

(size AA) alkaline

(size AA)

FM reception 17 46

SW reception 12 33

LW/MW reception 12 33

SPECIFICATIONS

Dimensions

Approx. 168 ×106 ×35 mm (W ×H ×D)

(6 5/8 ×4 1/4 ×1 7/16 in.) incl. projecting parts

Mass

Approx. 405 g (14.3 oz) incl. batteries

Supplied Accessories

Carrying case (1)

Short wave guide (1)

Design and specifications are subject to change without

notice.

TheAC power adaptor’s operating voltage varies

depending upon the country in which it is sold.

Buy theAC power adaptor in the country you intend

to use it.

Your Sony dealer may not handle all of the above listed

optional accessories. Please ask your dealer for detailed

information on the optional accessories available in your

country.

*1Italy, Saudi Arabia and Malaysia

*2Countries except for Italy

*3Italy only

Ver 1.0 2000. 03

– 2 –

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.

TABLE OF CONTENTS

1. GENERAL

Operating the Radio................................................................. 3

Setting the Standby Time ........................................................ 5

Setting the Sleep Timer ........................................................... 5

Using Other Functions............................................................. 5

2. DISASSEMBLY

2-1. Cabinet (Rear) ..................................................................... 6

2-2. Main Board ......................................................................... 6

2-3. Micon Board ....................................................................... 7

3. ELECTRICAL ADJUSTMENTS

FM Section .............................................................................. 8

SW/MW/LW Section............................................................... 8

FM VCO Adjustment............................................................... 9

4. DIAGRAMS

4-1. IC Pin Description............................................................. 10

4-2. Block Diagram .................................................................. 11

4-3. Printed Wiring Board – Main Section – ............................ 13

4-4. Schematic Diagram – Main Section –............................... 15

4-5. Printed Wiring Board – Micon Section – .......................... 17

4-6. Schematic Diagram – Micon Section –............................. 19

5. EXPLODEDVIEW

5-1. Cabinet Section ................................................................. 22

6. ELECTRICAL PARTS LIST......................................... 23

–3 –

SECTION 1

GENERAL This section is extracted

from instruction manual.

–4 –

–5 –

–6 –

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

2-1. CABINET (REAR)

2-2. MAIN BOARD

SECTION 2

DISASSEMBLY

1P 3x14

5cabinet (rear)

2P 3x14

4claw

3claws

2P 3x14

1Removal the solder.

6MAIN board

5CN1

3claw

4claw

–7 –

2-3. MICON BOARD

1BTP 2x8

2BTP 2x8

3MICON board

–8 –

FM SECTION 0 dB = 1 µV

Setting:

BAND switch: FM

VOLUME: MAX

ATT: OFF

TONE: MUSIC

SECTION 3

ELECTRICAL ADJUSTMENTS

telescopic

antenna terminal

0.01µF

FM RF signal

generator

400Hz, 30% FM modulation

frequency deviation ±22.5kHz

Output level: as low as possible

set

SW/MW/LW SECTION

Setting:

BAND switch: SW or MW or LW

VOLUME: MAX

ATT: OFF

TONE: MUSIC

(SW)

telescopic

antenna terminal

10µF

AM RF signal

generator

400Hz, 30%

AM modulation

Output level: as low as possible

set

(MW/LW)

• Connecting Level Meter (FM, SW, MW and LW)

Put the lead-wire

antenna close to

the set.

AM RF signal

generator

400Hz, 30%

AM modulation

Output level: as low as possible

ijack (J1)

set

16 Ω

level meter

(range: 0.5–5 V ac

)

• Connecting DigitalVoltmeter (FM, SW, MW and LW)

•Repeat the procedures in each adjustment several times, and the

frequency coverage and tracking adjustments should be finally

done by the trimmer capacitors.

digital

voltmeter

(VT)

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

Frequency Display 11,800 kHz

Adjustment Part T1, T4

LW FREQUENCY COVERAGE

CHECK

Frequency Display 150 kHz

Reading on Digital voltmeter 1.0 - 1.3 V

Adjustment Part <confirmation>

SW FREQUENCY COVERAGE

CHECK

Frequency Display 26,100 kHz

Reading on Digital voltmeter 8.0 - 9.0 V

Adjustment Part <confirmation>

FM FREQUENCY COVERAGE

CHECK

Frequency Display 76 MHz 108 MHz

Reading on Digital voltmeter 2.8 - 4.0 V 9.5 - 11.0 V

Adjustment Part <confirmation> <confirmation>

FMTRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

Frequency Display 76 MHz 108 MHz

Adjustment Part L11 CT1

Adjustment Location: See page 9.

–9 –

C70

JC8

C66

C59

C67

C62

C54

L12

D10

L10

L7 JC3

D11

L17

C45

C55

C60

C65

C68

C73R56 R85 C56

R53

R46

C47

C49

C53

C52

L16

L15

R59

R55

R38

R35

R52

R43

R49

R50 R48

R45

C44

C39

C17

C21

R33

C35

R37

C32

R30

R25R23

C18

R10 C16

R11 R5

R26 R7

C19

R47

C46

C36

R54

R63

R62

R60

R61

C51

R51

C50

L14

JC18

JC7

R42

R34

C48

R17 C22

C20

R44

C40 R14

R15 C12

L6 L5

C10

C29

C31

R74

C28

C30

C27

R24

C93

C90

C100

IC3

R75

C92

JW15

JW16

JW13

JW11

JW3

JW4

JW12

C91

D12

JC16

JC4

JC6

JC5

JC19

JC17

C26

R22

C25

C11

C14

C13

C15

C38

C37

R36 C34

R29 C33

R28

R32

R31

C43

C42

Q20

R41

R40 R39

C89

(D-D OUT)

TP(10.25)

(GND)

(LCH)

(B/R)

(BEEP)

R65

R83

R64

JC11

JW7

JW5

C74 CF4 C57

C41

C58

RV2

JW8

JW10

Q23

Q24

Q19

Q17

Q11

Q12

Q15

Q13

Q29

Q28 Q10

Q14

Q36

Q35

Q18

18 4

CN1

L11

L13

CT1

BPF1

(GND)

IC1

CF2

C64

(VT)

T3 S

(VCOL) TP

(H/L)

(VCOH) MW/

(POWER)

TP(RF GND)

(AGC)

(VT)

–main board (conductor side) –

FM VCO ADJUSTMENT • Connecting Frequency counter

telescopic

antenna terminal

0.01µF

FM RF signal

generator

98MHz, non-modulation

Output level: 0.1v(100dB)

set

33 kΩ

frequency

counter

1µF/50V

IC1 pin

FM VCO ADJUSTMENT

Reading on Frequency counter 76 kHz ± 200 Hz

Adjustment Part RV2

Adjustment Location:

(VT)

IC1

IC3

IC2

1516

CN1

T1 T4

RV2

L11 CT1

ANT1

FM/SW

TELESCOPIC

ANTENNA

ANT2

MW/LW

FERRITE-ROD

ANTENNA

(CONDUCTOR SIDE)

FM TRACKING ADJUSTMENT AM IF ADJUSTMEN

FM VCO ADJUSTMENT

–main board (component side) –

–10 –

SECTION 4

DIAGRAMS

4-1. IC PIN DESCRIPTION

•IC201 uPD17072GB-017-1A7 (SYSTEM CONTROL,LCD DRIVER)

Pin No. Pin Name I/O Pin Description

1 CS O EEPROM CS control output

2 POWER O Power supply (for signal ) start output H: Radio ON L: Radio OFF

3 BAR/ROD O Antenna switch output H: BARANTENNA L: ROD ANTENNA

4 MUTE O MUTE output H: MUTE OFF L: MUTE ON

5 AM/FM O Band switch signal output H: SW, MW, LW L: FM

6 –9 KS0 –3 O Key source output

10 –13 KR0 –3 I Key return input

14 INITIAL O 9K/10K read output

15 NORMAL/FINE I Frequency step switch input H: FINE L: NORMAL

16 H/L O SW filter switch signal output H: SW L: FM, MW. LW

17 10.25 O Attenator output

18 GND —GND

19 EO O Tuner PLL error output

20 VCOL (LW/MW/SW) I VCO (SW/MW/LW band) input

21 VCOH (FM) I VCO (FM band) input

22 REG0 —Capacitor terminal (regulator circuit)

23 VDD —Power supply terminal (+2.7 V)

24 XOUT O Oscillation output (75 kHz)

25 XIN I Oscillation input (75 kHz)

26 REG1 —Capacitor terminal (regulator circuit)

27 REGLCD0 —LCD driving power supply terminal

28, 29 CAPLCD0, 1 —LCD driving power supply terminal

30 REGLCD1 —LCD driving power supply terminal

31 –34 COM0 –3 O LCD drive common output

35 –49 LCD0 –14 O LCD drive segment output

50, 51 VDET1, 2 I Reducing voltage information input

52 BEEP O Beep output

53 TUNE I Receive information input

54 HOLD I Hold input

55 SCK O Serial clock output

56 DI/DO I/O Serial data input/output

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