Sony SRF-R405 Radio User Manual

The Sony SRF-R405 is a compact, portable AM/FM radio featuring a built-in speaker, headphone jack for private listening, telescopic antenna, digital tuning with preset stations, LCD display with clock and battery indicator, and is powered by two AA batteries. 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 Headphones 7. Using Preset Stations 8. Clock and Timer Functions 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: LCD Display, Speaker, Headphone Jack, Telescopic Antenna, Tuning/Volume Knob, Preset Buttons, Power/Band Switch.

Feature	Description
LCD Display	Shows frequency, time, battery level, and band
Built-in Speaker	For room-filling sound
Headphone Jack (3.5mm)	For private audio listening
Telescopic Antenna	Extends for improved FM reception
Tuning/Volume Knob	Dual-function control for tuning and volume adjustment
Preset Buttons (1-5)	Store and recall favorite stations
Power/Band Switch	Turns radio On/Off and selects AM or FM band
Battery Compartment	Holds two AA batteries
Clock/Timer Button	Accesses time setting and sleep timer functions
Reset Button	Resets all settings to factory defaults

Installation

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

Install batteries: Open battery compartment, insert two AA batteries observing correct polarity (+/-).
Extend antenna: Fully extend telescopic antenna for best FM reception.
Connect headphones (optional): Plug 3.5mm headphones into jack for private listening.
Turn on: Slide Power/Band switch to FM or AM position.

WARNING! Do not expose radio to water or extreme temperatures. Use only recommended battery type.

First-Time Setup

Power on radio; follow these initial steps.

Set the clock: Press and hold CLOCK/TIMER button, use Tuning knob to adjust hours/minutes.
Tune stations: Rotate Tuning knob to desired frequency. For precise tuning, turn slowly.
Set preset stations: Tune to desired station, press and hold a Preset button (1-5) until display confirms.
Adjust volume: Rotate inner part of Tuning/Volume knob to preferred listening level.

CAUTION! Keep away from magnetic sources which may affect tuning accuracy.

Specifications

Model: Sony SRF-R405.
Bands: FM 87.5-108 MHz / AM 530-1710 kHz.
Power Supply: 2 x AA batteries (DC 3V).
Battery Life: Approx. 50 hours (varies by usage and battery type).
Output: Built-in speaker; 3.5mm stereo headphone jack.
Display: LCD with frequency, time, battery indicator.
Presets: 5 stations per band (FM/AM).
Dimensions: Compact portable size.
Weight: Lightweight for easy portability.
Accessories: User manual, warranty card.

Controls and Settings

All functions controlled via front panel buttons and knobs.

Front Panel: Power/Band Switch, Tuning/Volume Knob, Preset Buttons (1-5), CLOCK/TIMER Button, LCD Display.

Tuning: Rotate outer knob to scan frequencies. Volume: Rotate inner knob to adjust loudness. Presets: Press briefly to recall; hold to store. Clock: Press CLOCK/TIMER to view time; hold to set. Sleep Timer: Press CLOCK/TIMER twice to set auto-off (15-90 min). Band Selection: Slide switch between FM and AM. Reset: Small recessed button to restore factory settings.

Connecting Headphones

Use standard 3.5mm stereo headphones for private listening.

Ensure radio is on and volume is at minimum.
Insert headphone plug fully into the jack.
Adjust volume to a comfortable level.
To switch back to speaker, simply unplug headphones.

Tip: Using headphones may improve reception in low signal areas by reducing interference.

Using Preset Stations

Store up to 5 favorite stations for each band (FM/AM).

Tune: Use Tuning knob to find desired station.
Store: Press and hold a Preset button (1-5) until the display flashes.
Recall: Briefly press the same Preset button to tune to that station.
Overwrite: To change a preset, repeat store process with new frequency.
Band-specific: Presets are separate for FM and AM bands.

Note: Presets are retained in memory when batteries are removed, but may be lost if batteries are depleted for extended period.

Clock and Timer Functions

LCD displays current time when radio is off or on. Sleep timer turns radio off automatically.

Setting Clock: Hold CLOCK/TIMER, adjust with Tuning knob, press button to confirm.

Sleep Timer: Press CLOCK/TIMER twice, use Tuning knob to select duration (15, 30, 45, 60, 90 minutes), timer starts automatically. Display shows countdown. To cancel, press CLOCK/TIMER again or turn radio off.

Care & Cleaning

Remove batteries before cleaning. Use soft, dry cloth only; do not use chemicals or abrasives.

CAUTION! Never immerse radio in water. Keep battery compartment dry. Avoid extreme heat or cold.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Sony Corporation. For support, visit www.sony.com/electronics/support or contact Sony Customer Service at 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Dead batteries, incorrect installation	Replace with fresh AA batteries; ensure correct polarity.
Poor FM reception	Antenna not extended, location	Fully extend telescopic antenna; move radio near window.
Poor AM reception	Interference, orientation	Rotate radio; move away from electronics (computers, TVs).
Display dim or blank	Low batteries	Replace batteries immediately.
Presets lost	Batteries removed too long	Re-enter preset stations.
No sound from speaker	Volume low, headphones plugged in	Increase volume; ensure headphones are unplugged.
Clock incorrect	Power interruption	Reset the clock following instructions in section 4.

Reset: Use small pointed object to press recessed RESET button.

Service: 1-800-222-7669; www.sony.com/electronics/support