Sony SRF-M55 Radio User Manual

The Sony SRF-M55 is a compact, portable AM/FM stereo radio with digital tuning, preset stations, LCD display with backlight, built-in speaker, headphone jack, and belt clip. It features auto-scan tuning, sleep timer, 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 Devices 7. Advanced Functions 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: LCD display with backlight, Speaker, Headphone jack, Belt clip, Power/Battery compartment, Control buttons.

Feature	Description
AM/FM Stereo Tuner	Digital tuning for clear reception
LCD Display	Shows frequency, time, preset number, battery status
Backlight	Illuminates display in low light
Preset Stations	Memory for storing favorite stations
Auto-Scan Tuning	Automatically finds and stops at stations
Sleep Timer	Turns radio off after set time
Built-in Speaker	For room listening
Headphone Jack (3.5mm)	For private listening
Belt Clip	For portable use
Power Source	Two AA batteries or optional AC adapter

Installation

Unpack and inspect contents. Ensure all parts are present.

Insert batteries: Open battery compartment, insert two AA batteries observing polarity.
Attach belt clip: Slide onto back of radio until it clicks into place.
Extend antenna: Fully extend telescopic antenna for best reception.
Connect headphones: Plug into headphone jack for private listening.

WARNING! Do not mix old and new batteries or different battery types. Remove batteries if not using for extended periods.

First-Time Setup

Power on radio; follow initial setup steps.

Set time: Press and hold CLOCK button, use TUNING buttons to set time.
Tune to stations: Use MANUAL TUNING or AUTO SCAN to find stations.
Save presets: Tune to desired station, press and hold preset number (1-10) to store.
Adjust volume: Use VOLUME control knob.
Select band: Press BAND button to switch between AM and FM.

CAUTION! Keep away from moisture and extreme temperatures.

Specifications

Tuning Range: FM: 87.5-108 MHz, AM: 530-1710 kHz.
Power Output: 100 mW per channel into 32 ohms.
Speaker: 57 mm dynamic type.
Headphone Jack: 3.5 mm stereo mini jack.
Power Requirements: DC 3V (Two AA batteries) or AC adapter (optional).
Battery Life: Approx. 45 hours (alkaline batteries, volume mid-level).
Dimensions: Approx. 120 x 75 x 30 mm (W x H x D).
Weight: Approx. 150 g (without batteries).
Operating Temperature: 0°C to 40°C.

Controls and Settings

Front Panel: POWER button, VOLUME knob, BAND selector, TUNING buttons, PRESET buttons (1-10), DISPLAY/BACKLIGHT button.

Side Controls: Headphone jack, DC IN jack (for optional adapter).

Tuning: Manual (TUNING +/-) or Auto (AUTO SCAN). Presets: Store up to 10 stations per band. Display: Shows frequency, time, preset number, battery indicator. Clock: Set with CLOCK button. Sleep Timer: Set to turn off after 15-90 minutes. Backlight: Press DISPLAY button to illuminate for 5 seconds.

Connecting Devices

Headphones: 3.5mm stereo plug. AC Adapter: Optional DC 3V adapter.

Turn off radio before connecting devices.
Plug headphones into headphone jack for private listening.
For AC power, plug optional adapter into DC IN jack and wall outlet.

Tip: Use headphones to enjoy stereo FM broadcasts.

Advanced Functions

Supports various listening modes and features.

Auto-Scan: Press and hold TUNING + to scan and stop at next station.
Preset Recall: Press preset number (1-10) to tune to saved station.
Sleep Timer: Press SLEEP repeatedly to set 15, 30, 45, 60, 90 minutes.
Backlight: Press DISPLAY to illuminate LCD for 5 seconds.
Battery Save: Auto power-off after 30 minutes if no operation (can be disabled).
Manual Tuning: Use TUNING +/- for precise frequency selection.

WARNING! Do not expose to strong magnetic fields which may affect performance.

Accessibility Features

Large display with backlight for easy reading. Tactile buttons with distinct shapes. Simple menu structure with audible feedback on button presses.

Care & Cleaning

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

CAUTION! Do not immerse in water or other liquids. Keep away from heat sources.

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	Replace with fresh AA batteries; check polarity.
Poor reception	Antenna position/location	Fully extend antenna; reposition radio; move away from obstacles.
No sound from speaker	Volume/Mute/Headphones	Increase volume; ensure headphones are not plugged in.
Presets not saved	Battery removal	Presets are lost when batteries are removed; replace batteries promptly.
Display dim or blank	Backlight/Batteries	Press DISPLAY for backlight; replace weak batteries.
Auto-scan not stopping	Weak signal	Manual tune to station; improve antenna position.

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

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