Sony ICF-403S Radio User Manual

The Sony ICF-403S is an AM/FM portable radio with a built-in speaker, telescopic antenna, headphone jack, and battery or AC power operation. It features manual tuning, volume control, tone adjustment, and a carrying handle. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Playing Radio 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: AM/FM tuner, built-in speaker, telescopic antenna, headphone jack, AC power input, carrying handle.

Feature	Description
Telescopic antenna	For improved FM reception; extend fully
Headphone jack	For private listening (3.5mm)
AC power input	For use with AC adapter (sold separately)
Battery compartment	Holds batteries for portable operation
Carrying handle	For easy transport
TUNING knob	Manual tuning for AM/FM bands
VOLUME knob	Adjusts sound level
TONE switch	Selects tone (Normal/High)
BAND switch	Selects AM or FM band
POWER switch	Turns radio on/off

Installation

Unpack and inspect contents. Place on stable, dry surface.

Insert batteries: Open battery compartment, install batteries observing correct polarity.
Extend antenna: Fully extend telescopic antenna for FM reception.
Connect AC power (optional): Plug AC adapter into AC input and wall outlet.
Connect headphones (optional): Plug into headphone jack for private listening.

WARNING! Do not expose to water or extreme temperatures. Use correct battery type.

First-Time Setup

Power on radio; follow these steps.

Select band: Set BAND switch to AM or FM.
Tune station: Use TUNING knob to find desired station.
Adjust volume: Turn VOLUME knob to comfortable level.
Set tone: Use TONE switch for Normal or High tone.

CAUTION! Keep away from magnetic sources to avoid interference.

Specifications

Model: Sony ICF-403S.
Bands: AM (530-1710 kHz), FM (88-108 MHz).
Power Supply: Batteries (size dependent on model) or AC adapter (optional).
Speaker: Built-in dynamic speaker.
Output: Headphone jack (3.5mm).
Antenna: Built-in ferrite bar for AM; telescopic for FM.
Dimensions: Compact portable design.
Weight: Lightweight for portability.

Controls and Settings

All controls are located on the front/side of the unit.

Front/Side Panel: POWER switch, BAND switch, TUNING knob, VOLUME knob, TONE switch.

Tuning: Use TUNING knob to manually scan AM/FM bands. Volume: Adjust with VOLUME knob. Tone: TONE switch selects audio character (Normal for balanced, High for enhanced treble). Power: POWER switch turns unit on/off.

Connecting Devices

Headphones: 3.5mm jack. AC power: Use compatible AC adapter.

Turn off radio before connecting devices.
Plug headphones into headphone jack.
For AC power, ensure adapter voltage matches specifications.

Tip: Use fresh batteries for best portable performance.

Playing Radio

Supports AM and FM radio reception.

Power on: Set POWER switch to ON.
Select band: Choose AM or FM with BAND switch.
Tune: Rotate TUNING knob slowly to find station.
Adjust: Set VOLUME and TONE as desired.
For FM: Extend telescopic antenna fully and adjust for best reception.
For AM: Rotate radio for optimal ferrite bar antenna reception.

WARNING! Do not force knobs; turn gently. Keep antenna away from obstructions.

Accessibility Features

Large, tactile knobs for easy operation. Headphone jack for private listening.

Care & Cleaning

Remove batteries before cleaning. Use soft, dry cloth; do not use liquids.

CAUTION! Do not immerse in water; avoid abrasive cleaners.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Sony Corporation; trademarks owned by Sony. For support, visit www.sony.com/electronics/support or contact Sony customer service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Dead batteries/switch	Replace batteries; ensure POWER switch is ON.
Poor FM reception	Antenna not extended	Fully extend telescopic antenna; reposition radio.
No sound	Volume low/headphones	Increase VOLUME; disconnect headphones if plugged in.
AM stations weak	Interference/location	Move away from electronics; rotate radio for better reception.
Distorted sound	Battery low/signal weak	Replace batteries; adjust antenna or reposition.

Reset: Turn off and remove batteries for 1 minute, then reinstall.

Service: Contact Sony customer support or authorized service center.