Sony Sports Walkman SRF-M78 Radio User Manual

The Sony Sports Walkman SRF-M78 is a compact, durable AM/FM radio designed for active use. It features a built-in speaker and headphone jack, digital tuning with preset stations, a backlit LCD display, water-resistant construction, belt clip, and is powered by two AAA 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. Using the Radio 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: AM/FM Tuner, LCD Display with Backlight, Built-in Speaker, Headphone Jack, Belt Clip, Battery Compartment.

Feature	Description
AM/FM Tuner	Digital tuning for clear reception on both AM and FM bands
LCD Display	Shows frequency, time, preset number; includes backlight for low-light conditions
Built-in Speaker	For listening without headphones
Headphone Jack (3.5mm)	For private audio listening
Belt Clip	Attaches to clothing or bag for portable use
Battery Compartment	Holds two AAA batteries (not included)
POWER/SOURCE	Turns radio on/off and switches between AM/FM
TUNING (+/-)	Seeks or manually tunes stations
PRESET (1-5)	Stores and recalls up to 5 stations per band
VOLUME (+/-)	Adjusts sound level

Installation

Unpack and inspect contents. Ensure all parts are present.

Insert Batteries: Open battery compartment, insert two AAA batteries observing correct polarity (+/-).
Attach Belt Clip: Slide clip onto the designated slot on the back of the radio until it clicks into place.
Connect Headphones (Optional): Plug 3.5mm headphones into the headphone jack.
Extend Antenna: Fully extend the telescopic antenna for best reception.

WARNING! Do not use damaged or leaking batteries. Keep batteries away from children.

First-Time Setup

Power on the radio; follow these steps for initial configuration.

Set Time: Press and hold the CLOCK button, then use TUNING +/- to set the correct time.
Auto Scan for Stations: Press and hold TUNING + for 2 seconds to automatically scan and store strong stations into presets.
Manual Preset Programming: Tune to desired station, press and hold a PRESET button (1-5) for 2 seconds to store.
Adjust Volume: Use VOLUME +/- to set a comfortable listening level.

CAUTION! Ensure the battery compartment cover is securely closed, especially if using near water.

Specifications

Model: Sony Sports Walkman SRF-M78.
Tuning Range: FM: 87.5 - 108 MHz, AM: 530 - 1710 kHz.
Power Supply: 2 x AAA (1.5V) batteries (DC 3V).
Battery Life: Approx. 40 hours (backlight off, using headphones).
Output: Headphone jack output: 10mW (into 32 ohms).
Antenna: FM: Telescopic rod; AM: Built-in ferrite bar.
Dimensions (approx.): 3.5" W x 4.7" H x 1.2" D (with clip).
Weight (approx.): 4.6 oz (including batteries).
Operating Temp: 32°F to 104°F (0°C to 40°C).

Controls and Settings

Access functions via front panel buttons. Front Panel: POWER/SOURCE, TUNING +/-, PRESET 1-5, VOLUME +/-, CLOCK, LIGHT.

Button Functions: POWER/SOURCE: Turns on and cycles between AM/FM. TUNING: Short press for manual step, hold for auto-scan. PRESET: Short press to recall, hold to store. CLOCK: Sets time. LIGHT: Turns LCD backlight on for 5 seconds.

Settings: Time Display (12/24 hr), Sleep Timer (turns off after set time), Tuning Step (FM: 50/100 kHz, AM: 9/10 kHz).

Connecting Devices

Headphones: Use standard 3.5mm plug. External Power: Not supported; use batteries only.

Ensure radio is off before connecting headphones.
Insert headphone plug fully into the jack.
When headphones are connected, the internal speaker is disabled.

Tip: For best audio quality, use Sony recommended headphones.

Using the Radio

Supports AM and FM band reception.

Power On: Press POWER/SOURCE button.
Select Band: Press POWER/SOURCE again to switch between AM and FM.
Tune Station: Use TUNING +/- to find a station. Hold button for auto-scan.
Use Presets: Press a numbered PRESET button (1-5) to instantly tune to a saved station.
Adjust Volume: Use VOLUME +/-.
Sleep Timer: Press and hold CLOCK, then press TUNING +/- to set 15-90 min shut-off.
Backlight: Press LIGHT button to illuminate display in dark conditions.

WARNING! Do not submerge in water. Water-resistant does not mean waterproof. Avoid extreme temperatures.

Accessibility Features

Tactile Buttons: Raised markings for key controls. Large LCD: Clear, high-contrast display with adjustable backlight.

Care & Cleaning

Remove batteries before cleaning. Use a soft, slightly damp cloth. Do not use solvents or abrasives.

CAUTION! Never allow water to enter the battery compartment or controls. Dry thoroughly if wet.

Regulatory Information

FCC Part 15: This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Copyright © Sony Corporation. Sony and Walkman are trademarks of Sony Group Corporation. For support, visit www.sony.com/electronics/support or contact 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Dead/incorrect batteries	Replace with new AAA batteries; ensure correct polarity.
Poor reception	Antenna not extended; location	Fully extend antenna; move to a location with better signal.
No sound from speaker	Headphones plugged in; volume low	Unplug headphones; increase volume.
Presets lost	Batteries removed for extended time	Re-program desired stations into presets.
Display is dim/blank	Backlight off; weak batteries	Press LIGHT button; replace batteries.

Reset: Remove batteries for 1 minute, then reinsert to reset microprocessor.

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