sony SRF-M73 Operating Instructions (primary manual) Radio User Manual

The Sony SRF-M73 is a compact, portable AM/FM stereo radio with a built-in speaker and headphone output. It features digital tuning with preset stations, a backlit LCD display, auto-scan, and a built-in clock with alarm function. Powered by two AA batteries or an optional AC adapter. 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. Clock and Alarm 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, telescopic antenna, and control buttons.

Feature	Description
AM/FM Stereo Tuner	Receives AM and FM stereo broadcasts
Digital Tuning	Precise station selection with frequency display
Preset Stations	Store up to 10 AM and 10 FM stations
Auto Scan	Automatically finds and stops at receivable stations
LCD Display	Shows frequency, time, band, and battery status
Backlight	Illuminates display for low-light conditions
Built-in Speaker	For room listening
Headphone Jack	For private listening (stereo)
Telescopic Antenna	Extends for improved FM reception
Clock & Alarm	Built-in clock with alarm function (buzzer or radio)

Installation

Unpack and inspect contents. Place on stable surface or use as portable unit.

Insert batteries: Open battery compartment, insert two AA batteries observing correct polarity.
Extend antenna: Pull out telescopic antenna for FM reception.
Connect headphones: Plug into headphone jack for private listening.
Optional AC adapter: Connect DC 3V adapter to DC IN jack.

WARNING! Use only recommended battery type. Do not mix old and new batteries.

First-Time Setup

Power on radio; set initial configurations.

Set the clock: Hold CLOCK button, use TUNING +/- to set time, press CLOCK to confirm.
Select band: Press BAND button to choose AM or FM.
Tune stations: Use TUNING +/- buttons or AUTO SCAN to find stations.
Save presets: Tune to desired station, hold a number button (0-9) for 2 seconds.

CAUTION! Keep away from moisture and extreme temperatures.

Specifications

Tuning Range: FM 87.5-108 MHz, AM 530-1710 kHz.
Power Supply: DC 3V (Two AA batteries) or AC adapter (optional).
Battery Life: Approx. 30 hours (alkaline, backlight off).
Output: Headphone jack (stereo mini jack).
Antenna: Telescopic antenna (FM), built-in ferrite bar (AM).
Dimensions: Approx. 120mm (W) x 70mm (H) x 25mm (D).
Weight: Approx. 150g (without batteries).
Operating Temp: 0°C to 40°C.

Controls and Settings

Front Panel: POWER, VOLUME, BAND, TUNING +/-, AUTO SCAN, PRESET, CLOCK, ALARM SET, BACKLIGHT.

Display Indicators: Band (AM/FM), frequency, clock time, alarm on, battery low, stereo.

Tuning: Manual with TUNING +/- or AUTO SCAN. Presets: Store 10 AM and 10 FM stations. Volume: Adjust with VOLUME button. Backlight: Press BACKLIGHT to illuminate display for 5 seconds. Clock Settings: Adjust via CLOCK button. Alarm Settings: Set via ALARM SET button (radio or buzzer).

Connecting Devices

Headphones: 3.5mm stereo plug to headphone jack. AC Adapter: Optional DC 3V adapter to DC IN jack.

Ensure radio is off before connecting devices.
Insert headphone plug fully into jack.
For AC adapter, use Sony recommended model only.

Tip: Using headphones improves stereo separation and private listening.

Using the Radio

Basic operation for AM/FM listening.

Power on: Press POWER button.
Select band: Press BAND to choose AM or FM.
Tune station: Use TUNING +/- or press AUTO SCAN to scan and stop at a station.
Adjust volume: Use VOLUME +/- buttons.
Recall preset: Press and hold PRESET, then press a number (0-9).
Store preset: Tune to station, hold a number button for 2 seconds until beep.
Turn off: Press POWER button.

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

Clock and Alarm Features

Set clock: Hold CLOCK, adjust time with TUNING +/-, press CLOCK to set. Set alarm: Hold ALARM SET, choose alarm time (display flashes), select source (radio or buzzer), press ALARM SET to confirm. Alarm on/off: Press ALARM ON/OFF button. Snooze: Press SNOOZE during alarm to pause for 5 minutes.

Care & Cleaning

Remove batteries before cleaning. Wipe exterior with soft, dry cloth. Do not use solvents or abrasive cleaners.

CAUTION! Keep battery compartment dry. Do not immerse in water.

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.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Batteries dead/incorrect	Replace batteries; ensure correct polarity.
Poor FM reception	Antenna not extended/location	Extend telescopic antenna fully; move to better location.
No sound from speaker	Volume low/headphones plugged in	Increase volume; unplug headphones.
Clock resets	Batteries removed/low	Replace batteries promptly; clock resets if power lost.
Alarm not sounding	Alarm off/settings incorrect	Check alarm ON indicator; verify alarm time and source.
Display dim or blank	Backlight off/batteries low	Press BACKLIGHT; replace batteries if low indicator shows.

Reset: Remove batteries for 1 minute to reset microcomputer.

Service: Contact authorized Sony service center; www.sony.com/electronics/support