Sony Sports WALKMAN SFR-M78 Radio User Manual

The Sony Sports WALKMAN SFR-M78 is a portable, water-resistant AM/FM radio designed for active use. It features a built-in speaker, stereo headphone jack, digital tuning with preset stations, a backlit LCD display, and is powered by two AA batteries. The device is shock-resistant and suitable for outdoor activities. 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 the Radio 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Water-resistant casing, LCD display with backlight, built-in speaker, headphone jack, tuning and volume controls, preset buttons, power switch.

Feature	Description
Water-resistant design	Protects against splashes and light rain
Digital tuning	Precise AM/FM station selection
Preset stations	Store up to 10 favorite stations (5 AM, 5 FM)
Backlit LCD display	Shows station frequency, time, and battery status
Built-in speaker	For shared listening
Stereo headphone jack	For private listening with headphones
Power source	Two AA batteries (included)
Shock-resistant	Withstands minor impacts
Carabiner clip	Attach to backpack or belt
Auto-scan	Finds available stations automatically

Installation

Unpack and inspect contents. Ensure all parts are present.

Insert batteries: Open battery compartment, insert two AA batteries observing correct polarity.
Attach carabiner: Clip to belt loop or bag for portability.
Connect headphones: Plug into headphone jack for private listening.
Extend antenna: Pull up antenna for better reception.

WARNING! Do not submerge in water. Avoid extreme temperatures. Keep batteries away from children.

First-Time Setup

Power on radio; follow these steps.

Set time: Press and hold CLOCK button, use TUNING to set time.
Auto-scan stations: Press and hold SCAN to find available AM/FM stations.
Save presets: Tune to desired station, press and hold a preset button (1-5) to save.
Adjust volume: Use VOLUME knob to set comfortable listening level.

CAUTION! Use only recommended battery type. Remove batteries if not used for extended periods.

Specifications

Model: Sony Sports WALKMAN SFR-M78.
Frequency Range: FM 87.5-108 MHz, AM 530-1710 kHz.
Power Supply: Two AA batteries (DC 3V).
Battery Life: Approx. 50 hours (backlight off).
Speaker: 40mm dynamic speaker.
Headphone Output: 3.5mm stereo jack.
Dimensions: 85mm x 120mm x 30mm (W x H x D).
Weight: 150g (without batteries).
Operating Temp: 0°C to 40°C.
Water Resistance: IPX4 (splash resistant).

Controls and Settings

Access functions via front panel buttons and knobs.

Front Panel: POWER switch, VOLUME knob, TUNING knob, MODE (AM/FM), SCAN, CLOCK, PRESET (1-5), BACKLIGHT.

Tuning: Manual with TUNING knob or auto with SCAN. Presets: Store and recall with PRESET buttons. Display: Shows frequency, time, battery icon. Backlight: Press BACKLIGHT to illuminate display (15-second timeout). Volume: Adjust with VOLUME knob; built-in limiter prevents sudden loud sounds.

Connecting Devices

Headphones: Standard 3.5mm stereo plug. External antenna: Optional for improved AM reception.

Turn off radio before connecting devices.
Plug headphones into jack for private listening.
For external antenna, connect to AM EXT ANT port (optional accessory).

Tip: Use Sony headphones for optimal sound quality. Ensure connections are secure.

Using the Radio

Supports AM/FM radio reception.

Power on: Slide POWER switch to ON.
Select band: Press MODE to toggle between AM and FM.
Tune station: Use TUNING knob or press SCAN to auto-tune.
Save preset: Hold a PRESET button (1-5) until beep confirms.
Recall preset: Press corresponding PRESET button.
Adjust volume: Turn VOLUME knob clockwise to increase.
Use backlight: Press BACKLIGHT in low-light conditions.
Check battery: Low battery icon appears on display when power is low.

WARNING! Do not use headphones at high volume for extended periods to prevent hearing damage. Keep antenna fully extended for best reception.

Accessibility Features

Backlit display: Aids visibility in low light. Tone control: Adjust bass/treble via hidden menu (press and hold MODE while turning TUNING).

Care & Cleaning

Remove batteries before cleaning. Wipe casing with soft, damp cloth; do not use chemicals.

CAUTION! Do not immerse in water. Avoid abrasive cleaners. Store in dry place.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. ICES-003: Complies with Canadian EMI regulations. Copyright © Sony Corporation. For support, visit www.sony.com/audio or contact 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Dead batteries	Replace with fresh AA batteries; check polarity.
Poor reception	Antenna/ location	Extend antenna fully; move to open area; avoid obstructions.
No sound from speaker	Volume/ headphones	Increase volume; ensure headphones are unplugged.
Display blank	Backlight/ batteries	Press BACKLIGHT; replace batteries if dim.
Presets lost	Battery removal	Presets reset when batteries removed; reprogram stations.

Reset: Remove batteries for 30 seconds to reset microprocessor.

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