Sony Walkman SRF-M48RDS Radio User Manual

The Sony Walkman SRF-M48RDS is a portable AM/FM radio with RDS (Radio Data System) functionality, featuring a built-in speaker, headphone jack, telescopic antenna, LCD display with backlight, auto/manual tuning, preset stations, alarm clock with snooze function, and battery-powered operation. 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. Using RDS Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: LCD display with backlight, Built-in speaker, Headphone jack (3.5mm), Telescopic antenna, Power/Battery compartment, Control buttons.

Feature	Description
LCD Display	Shows frequency, time, station name (RDS), and alarm status
Built-in Speaker	For listening without headphones
Headphone Jack	For private audio listening (3.5mm stereo)
Telescopic Antenna	Extends for improved FM reception
Power Source	Operates on 2 x AA batteries (not included)
RDS Function	Displays station name and other broadcast data
Preset Stations	Store up to 10 AM/FM stations
Alarm Clock	Wake to radio or buzzer with snooze function
Auto/Manual Tuning	Scan for stations or tune manually
Sleep Timer	Automatically turns off radio after set time

Installation

Unpack and inspect contents. Ensure all parts are present.

Insert batteries: Open battery compartment, insert 2 AA batteries observing correct polarity.
Extend antenna: Pull telescopic antenna fully out for best FM reception.
Connect headphones: Plug into 3.5mm jack if desired.
Power on: Slide POWER switch to ON position.

WARNING! Use only recommended battery type. Do not mix old and new batteries. Remove batteries if not using for extended periods.

First-Time Setup

Power on radio; follow these initial setup steps.

Set time: Press and hold CLOCK button, use TUNING buttons to set correct time.
Tune stations: Use AUTO TUNING to scan for available stations.
Save presets: Tune to desired station, press and hold a number button (1-10) to save.
Set alarm: Press ALARM button to set wake time and source (radio/buzzer).
Adjust volume: Use VOLUME control wheel.

CAUTION! Keep away from moisture and extreme temperatures.

Specifications

Tuning Range: FM 87.5-108 MHz, AM 530-1710 kHz.
RDS: PS (Program Service name) display supported.
Speaker: Built-in monaural speaker.
Output: Headphone jack (3.5mm stereo).
Power Supply: 2 x AA batteries (DC 3V).
Battery Life: Approximately 45 hours (backlight off, earphone use).
Display: LCD with EL backlight.
Dimensions: Approx. 118 x 76 x 25 mm (W x H x D).
Weight: Approx. 140g (without batteries).
Operating Temp: 0°C to 40°C.

Controls and Settings

Front Panel: POWER switch, VOLUME wheel, SPEAKER/HEADPHONE selector, LCD display. Control Buttons: BAND (FM/AM), TUNING (+/-), AUTO TUNING, PRESET, CLOCK, ALARM, SNOOZE/LIGHT, SLEEP.

Basic Operations: Power: Slide POWER switch. Volume: Rotate VOLUME wheel. Band selection: Press BAND to toggle FM/AM. Tuning: Use TUNING buttons or AUTO TUNING. Presets: Press PRESET then number (1-10). Backlight: Press SNOOZE/LIGHT. Sleep timer: Press SLEEP repeatedly to set duration (off, 15, 30, 45, 60, 90, 120 min). Alarm: Set via ALARM button; snooze with SNOOZE/LIGHT.

Connecting Devices

Headphones: Standard 3.5mm stereo plug. External antenna: Not typically required; use telescopic antenna.

Ensure radio is powered off before connecting headphones.
Plug headphones firmly into jack.
Switch SPEAKER/HEADPHONE selector to HEADPHONE position.
Adjust volume to comfortable level.

Tip: For best FM reception, fully extend telescopic antenna and orient vertically.

Using RDS Features

RDS provides additional broadcast information when tuned to FM stations that support it.

Tune to FM station with RDS broadcast.
Station name (PS) will appear on display automatically if signal is strong.
No additional setup required for basic PS display.
If "NO PS" appears, station does not broadcast RDS data or signal is weak.

Note: RDS function works only on FM band. Move radio or adjust antenna for better reception if RDS data is not displayed.

Accessibility Features

Backlight: Press SNOOZE/LIGHT to illuminate display in dark conditions. Large buttons: Designed for easy operation. Tactile volume wheel: Easy to locate and adjust.

Care & Cleaning

Remove batteries before cleaning. Use soft, dry cloth to clean exterior. Do not use solvents or abrasive cleaners.

CAUTION! Avoid getting moisture into controls or speaker openings. Keep away from direct heat sources.

Regulatory Information

FCC Compliance: This device complies with Part 15 of FCC Rules. Operation is subject to condition that device does not cause harmful interference. ICES-003 Compliance: Class B digital apparatus. Copyright © Sony Corporation. For support, visit www.sony.com/electronics/support or contact Sony customer service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Batteries exhausted/incorrect	Replace with fresh AA batteries; check polarity.
Poor reception	Antenna not extended/location	Extend antenna fully; move to different location.
No sound from speaker	Volume low/headphone mode	Increase volume; ensure SPEAKER/HEADPHONE selector is set to SPEAKER.
Display dim or blank	Backlight off/batteries low	Press SNOOZE/LIGHT; replace batteries if needed.
Alarm not functioning	Alarm not set/power off	Set alarm correctly; ensure radio has power.
RDS not displaying	Station not broadcasting RDS/weak signal	Tune to different FM station; improve antenna position.

Reset: Remove batteries for 1 minute to reset all settings.

Service: Visit www.sony.com/electronics/support for service locations.