Sony ICF-SC1 User manual

MICROFILM

ICF-SC1/SC1PC

SERVICE MANUAL

PLL SYNTHESIZED SCANNING RECEIVER

SPECIFICATIONS

US Model

Circuit system :

Triple conversion superheterodyne

Frequency range :

25.000 – 1300.000MHz

(excluding cellular phone band : 823.980 – 849.020 MHz and

868.980 – 894.020 MHz)

Detection mode :

AM, NFM, WFM

Speaker : Approx. 36 mm (1 7/16 inches) dia., 8 ohms

Power output :

150mW(at 10% harmonic distortion

Output : @jack (monaural minijack)

Power requirements :

DC 6V, four sizeAA (R6) batteries

External power source :

DC 6V

Dimensions :

Approx. 64 x 177 x 44.3 mm (w/h/d) (2 5/8 x 7 x 1 3/4 inches)

incl. projecting parts and controls, not including the helical

antenna and the belt holder

Mass : Approx. 252g (8.9 oz)

Approx. 382g (13.5 oz) incl. alkaline batteries, helical

antenna, and the belt holder

Supplied Accessories

AC power adaptor (1)

Earphone (1)

Belt holder (1)

Helical antenna (1)

Frequency guidebook (1)

CD-ROM (1) (ICF-SC1PC only)

Serial port connecting cable (1) (ICF-SC1PC only)

Clamp filter (1) (ICF-SC1PC only)

Design and specifications are subject to change without notice.

Ver 1.0 1998.03

– 2 –

Specifications ........................................................................... 1

1. GENERAL

Location and Function of Controls .................................... 3

2. DISASSEMBLY

2-1. Helical Antenna Removal ......................................... 10

2-2. Cabinet (Rear) Assy Removal .................................. 10

2-3. Microcomputer Board, IF Board,

RF Board Removal ....................................................11

3. TEST MODE................................................................ 12

4. ELECTRICAL ADJUSTMENS .............................. 13

5. DIAGRAMS

5-1. Explanation of IC Terminals .................................. 15

5-2. Block Diagram ....................................................... 17

5-3. Printed Wiring Boards – IF Section– ..................... 19

5-4. Schematic Diagram – IF Section– ......................... 21

5-5. Printed Wiring Boards – Microcomputer Section– 23

5-6. Schematic Diagram – Microcomputer Section– .... 25

5-7. Printed Wiring Boards – RF Section –................... 27

5-8. Schematic Diagram – RF Section (1/2) – .............. 39

5-9. Schematic Diagram – RF Section (2/2) – .............. 31

6. EXPLODEDVIEW..................................................... 35

7. ELECTRICAL PARTS LIST.................................... 36

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH

MARK !ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS

LIST ARE CRITICALTO SAFE OPERATION.

REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE

PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN

SUPPLEMENTS PUBLISHED BY SONY.

TABLE OF CONTENTS

– 3 –

SECTION 1

GENERAL

LOCATION AND FUNCTION OF CONTROLS

FRONT

This section is extracted from

instruction manual.

– 4 –

SIDE/REAR DISPLAY

– 5 –

– 6 –

– 7 –

– 8 –

– 9 –

– 10 –

SECTION 2

DISASSEMBLY

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

2-1. HELICAL ANTENNA REMOVAL

2-2. CABINET (REAR) ASSY REMOVAL

Helical antenna

Battery case lid

Cabinet (Rear) ass

Screws

Claw

Claws

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