Sony SRF-M90 Radio User Manual

The Sony SRF-M90 is a portable AM/FM radio featuring a compact design, built-in speaker, headphone jack, telescopic antenna, digital tuning with preset stations, LCD display with backlight, battery operation, and belt clip for portability. 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. Playing Radio 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: LCD display, Built-in speaker, Headphone jack, Telescopic antenna, Control buttons, Battery compartment.

Feature	Description
Telescopic antenna	For improved FM/AM reception
Headphone jack (3.5mm)	For private audio listening
LCD display with backlight	Shows frequency, time, preset number
Digital tuning	Precise station selection
Preset memory	Store up to 10 AM/FM stations
Built-in speaker	For room-filling sound
Belt clip	For portable use on the go
POWER/SOURCE	Turns radio on/off and selects source
TUNING buttons	Manual tuning up/down
PRESET buttons	Recall stored stations

Installation

Unpack and inspect contents. Ensure all parts are present.

Insert batteries: Open battery compartment, insert 2 AA batteries observing polarity.
Extend antenna: Pull telescopic antenna fully for best reception.
Attach belt clip: Slide clip onto back of radio if desired for portable use.
Power on: Press POWER button to turn on radio.

WARNING! Use correct battery type; do not mix old and new batteries. Keep away from water.

First-Time Setup

Power on radio; follow these steps for initial use.

Select band: Press BAND button to choose AM or FM.
Auto-scan stations: Press and hold TUNING+ for 2 seconds to scan and stop at first strong station.
Set presets: Tune to desired station, press and hold a PRESET button (1-10) for 3 seconds to store.
Adjust volume: Use VOLUME+/- buttons to set desired listening level.

CAUTION! Do not expose to extreme temperatures; store in dry place.

Specifications

Model: Sony SRF-M90.
Bands: AM (530-1710 kHz), FM (87.5-108 MHz).
Power Source: 2 x AA batteries (DC 3V).
Battery Life: Approx. 50 hours (varies by usage).
Output: Built-in speaker; 3.5mm headphone jack.
Display: LCD with frequency, preset, battery indicator.
Presets: 10 stations (5 AM, 5 FM).
Dimensions: Compact portable design.
Weight: Lightweight for easy carrying.

Controls and Settings

Front Panel: POWER, BAND, TUNING+/-, VOLUME+/-, PRESET 1-10, LCD display.

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

Tuning: Manual with TUNING buttons; auto-scan by holding TUNING+. Volume: Adjust with VOLUME buttons; press and hold for rapid change. Presets: Store and recall with PRESET buttons. Display: Shows frequency, band, preset number, battery status. Settings: Sleep timer (15-90 min), backlight duration (5-30 sec).

Connecting Devices

Headphones: 3.5mm jack. External power: Optional AC adapter to DC IN jack.

Turn off radio before connecting devices.
Plug headphones into jack for private listening.
For AC power, use Sony-approved adapter (DC 3V, center positive).

Tip: Use headphones to avoid disturbing others; unplug when not in use.

Playing Radio

Supports AM and FM bands with preset memory.

Power on: Press POWER button.
Select band: Press BAND to toggle AM/FM.
Tune station: Use TUNING+/- or auto-scan.
Recall preset: Press corresponding PRESET button (1-10).
Adjust volume: Use VOLUME+/-.
Sleep timer: Press SLEEP to set shut-off time (15-90 min).
Backlight: Press LIGHT to illuminate display (5-30 sec).
Power off: Press POWER to turn off radio.

WARNING! Do not use headphones at high volume for extended periods to prevent hearing damage.

Accessibility Features

Large buttons for easy operation. Tactile markings on key controls. Backlight for low-light visibility.

Care & Cleaning

Remove batteries before cleaning. Use soft, dry cloth; avoid liquids.

CAUTION! Do not use solvents or abrasive cleaners; keep away from magnets.

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Dead batteries	Replace with fresh AA batteries; check polarity.
Poor reception	Antenna position	Extend telescopic antenna fully; reposition radio.
No sound from speaker	Volume/mute	Increase volume; check if headphones are plugged in.
Presets lost	Battery removal	Presets are cleared when batteries are removed; reprogram.
Display dim or blank	Low battery	Replace batteries; press LIGHT to check backlight.

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

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