Sony ICF-790S Radio User Manual

The Sony ICF-790S is a portable AM/FM radio featuring digital tuning, 20 station presets (10 AM, 10 FM), a large LCD display with backlight, sleep timer, alarm function, built-in speaker, headphone jack, and telescopic antenna. Powered by AC adapter (included) or batteries (not included). 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 Advanced Functions 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital tuner, LCD display, Preset buttons, Telescopic antenna, Headphone jack, DC IN jack.

Feature	Description
Digital Tuning	Precise AM/FM station selection with auto-scan
Station Presets	20 memory presets (10 for AM, 10 for FM)
LCD Display	Shows frequency, time, preset number, and battery indicator
Backlight	Illuminates display for low-light conditions
Sleep Timer	Automatically turns off radio after set time
Alarm Function	Wake to radio or buzzer alarm
Telescopic Antenna	Extends for improved FM reception
Headphone Jack	For private listening (3.5mm stereo)
DC IN Jack	For AC adapter connection
Battery Compartment	Holds batteries for portable use

Installation

Unpack and inspect contents. Place on stable, dry surface.

Insert batteries: Open compartment, install batteries observing polarity.
Connect AC adapter: Plug adapter into DC IN jack, then into wall outlet.
Extend antenna: Pull telescopic antenna up for FM reception.
Power on: Press POWER button.

WARNING! Use only specified AC adapter. Do not mix old and new batteries.

First-Time Setup

Power on radio; follow initial setup steps.

Set time: Press CLOCK SET, use TUNING buttons to set hour/minute.
Auto-scan stations: Press BAND to select AM/FM, then press and hold TUNING up/down to scan.
Save presets: Tune to desired station, press and hold a numbered preset button (1-10).
Adjust volume: Use VOLUME knob or buttons.

CAUTION! Keep away from water and extreme temperatures.

Specifications

Tuning Range: FM 87.5-108 MHz, AM 530-1710 kHz.
Preset Memory: 20 stations (10 AM, 10 FM).
Power Supply: AC 120V 60Hz adapter or 4 x AA batteries.
Output: Built-in speaker, 3.5mm headphone jack.
Display: LCD with backlight.
Functions: Sleep timer (15-90 min), alarm (radio/buzzer), snooze.
Antenna: Telescopic for FM, internal ferrite bar for AM.
Dimensions: Approx. 7.5 x 4.5 x 2 inches.
Weight: Approx. 1.2 lbs (without batteries).

Controls and Settings

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

Top/Side: SLEEP, ALARM SET, CLOCK SET, SNOOZE, HEADPHONE JACK, DC IN.

Tuning: Manual with TUNING buttons or auto-scan (hold TUNING). Presets: Save by holding preset button; recall by pressing once. Sleep Timer: Press SLEEP repeatedly to set duration (15, 30, 45, 60, 90 min, OFF). Alarm: Set time with ALARM SET, choose radio or buzzer. Display: Press DISPLAY to show time/frequency; hold for backlight.

Connecting Devices

Headphones: Plug into headphone jack. External antenna: Not supported; use telescopic antenna.

Ensure radio is off before connecting headphones.
Insert headphone plug fully into jack.
Adjust volume to comfortable level when using headphones.

Tip: Disconnect headphones when not in use to preserve battery life.

Using Advanced Functions

Supports alarm, sleep timer, and preset scanning.

Alarm: Set alarm time via ALARM SET; choose source (radio/buzzer). Alarm activates at set time; press SNOOZE for extra 9 minutes.
Sleep Timer: Press SLEEP to set countdown; radio turns off automatically.
Preset Scan: Press and hold PRESET SCAN (if available) to cycle through saved stations.
Time Display: Toggle between frequency and time by pressing DISPLAY.
Backlight: Hold DISPLAY button to illuminate for 10 seconds.

WARNING! Do not block speaker or ventilation openings.

Accessibility Features

Large display with backlight for easy reading. Tactile buttons for key functions. Headphone jack for private listening.

Care & Cleaning

Unplug AC adapter and remove batteries before cleaning. Use soft, dry cloth; avoid liquids.

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

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Batteries/adapter	Check battery polarity; replace batteries; ensure adapter plugged in securely.
Poor FM reception	Antenna/location	Fully extend telescopic antenna; reposition radio; avoid obstructions.
No sound	Volume/mute	Increase volume; check if headphones are plugged in (disables speaker).
Presets lost	Battery removal	Presets are maintained if batteries changed within 5 minutes; otherwise, reprogram.
Display dim/blank	Backlight/batteries	Activate backlight; replace weak batteries.
Alarm not working	Settings/power	Verify alarm time and source setting; ensure radio has power.

Reset: Remove batteries and AC adapter for 1 minute to reset microcomputer.

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