Sony ICF-C733L Radio User Manual

The Sony ICF-C733L is a compact AM/FM digital clock radio with dual alarm functionality, adjustable wake-up volume, Snooze feature, battery backup, and easy-to-read LCD display. It features a built-in speaker, headphone jack for private listening, and simple controls for time setting, alarm programming, and radio tuning. Powered by AC adapter (included) with battery backup for clock and alarm memory. 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: LCD display with time/alarm indicators, Speaker, Control buttons, Headphone jack, AC power input, Battery compartment.

Feature	Description
LCD Display	Shows time, alarm settings, and radio frequency
AM/FM Tuner	Digital tuning for AM and FM radio bands
Dual Alarm	Two independent alarms with adjustable volume
Snooze Function	Temporarily silences alarm for extra sleep time
Battery Backup	Maintains time and alarm settings during power outage
Headphone Jack	For private listening without disturbing others
Sleep Timer	Automatically turns off radio after set time
Time Set	Easy adjustment of hour and minute
Alarm Set	Program alarm time and wake-up source (radio/buzzer)
Power Switch	Turns radio on/off

Installation

Unpack and inspect contents. Place on stable, flat surface near power outlet.

Connect power: Plug AC adapter into DC IN jack on radio, then into wall outlet.
Insert backup batteries: Open battery compartment, install 2 AA batteries (not included) for backup.
Extend antenna: Fully extend telescopic antenna for better FM reception.
Position radio: Ensure good ventilation and avoid heat sources.

WARNING! Use only Sony-approved AC adapter. Do not place near water or excessive heat.

First-Time Setup

Connect power; clock display will flash.

Set time: Press and hold TIME SET, adjust hours/minutes with UP/DOWN buttons.
Set alarm: Press ALARM SET, choose ALARM 1 or 2, set time and wake source (radio/buzzer).
Tune radio: Press BAND to select AM/FM, use TUNING buttons to find station.
Save station: Press and hold a preset button (1-5) to store current frequency.

CAUTION! Install backup batteries before first use to prevent settings loss during power interruption.

Specifications

Tuning Range: FM 87.5-108 MHz, AM 530-1710 kHz.
Power Supply: AC 120V, 60Hz via adapter; DC 3V (2 x AA batteries for backup).
Display: LCD with backlight (adjustable).
Alarm: Dual alarm with radio or buzzer wake-up, volume control.
Snooze: 9-minute snooze duration.
Sleep Timer: 15-90 minutes in 15-minute increments.
Audio Output: Built-in speaker; 3.5mm headphone jack.
Dimensions: Compact desktop design.
Operating Temp: 5°C to 35°C (41°F to 95°F).

Controls and Settings

Front Panel: POWER, ALARM SET, TIME SET, SNOOZE/SLEEP, BAND, TUNING, PRESET buttons, VOLUME control.

Display Indicators: ALARM 1/2, PM, SLEEP, SNOOZE, battery low.

Time Setting: TIME SET + UP/DOWN. Alarm Setting: ALARM SET + UP/DOWN, choose radio/buzzer. Radio: BAND selects AM/FM, TUNING scans, PRESET recalls saved stations. Volume: Rotate VOLUME knob. Sleep: Press SLEEP repeatedly to set duration (15-90 min). Snooze: Press SNOOZE during alarm.

Connecting Devices

Headphones: Plug into 3.5mm jack for private listening. External antenna: For improved AM reception, connect wire to AM EXT terminal.

Ensure radio is off before connecting devices.
Insert headphone plug fully into jack.
For external antenna, use insulated wire and keep away from power lines.

Tip: Use headphones at moderate volume to protect hearing.

Using the Radio

Supports AM/FM listening with preset memory.

Turn on: Press POWER, select BAND (AM/FM).
Tune: Press TUNING up/down to scan; hold for fast scan.
Save preset: Tune to station, press and hold PRESET (1-5) until beep.
Recall preset: Press corresponding PRESET button.
Sleep timer: Press SLEEP repeatedly to set shut-off time (15-90 min).
Snooze: During alarm, press SNOOZE for 9 more minutes sleep.
Alarm off: Press ALARM OFF or POWER to stop alarm.
Battery backup: Maintains time and alarms during power loss (if batteries installed).

WARNING! Do not expose to extreme temperatures; keep batteries away from children.

Accessibility Features

Adjustable alarm volume: Set in alarm programming. Large display: Easy-to-read LCD with backlight. Tactile buttons: Clearly labeled for easy operation.

Care & Cleaning

Unplug before cleaning. Use soft, dry cloth; avoid chemicals or abrasive cleaners.

CAUTION! Do not use liquid cleaners; never immerse in water. Keep ventilation openings clear.

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 at 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection/batteries	Check AC adapter connection; ensure backup batteries installed correctly.
Poor radio reception	Antenna/location	Extend FM antenna fully; reposition radio; connect external AM antenna.
Alarm not sounding	Settings/volume	Verify alarm is ON; check wake source (radio/buzzer); increase alarm volume.
Display dim or blank	Power/backlight	Check power connection; adjust display contrast if available.
Time resets	Battery backup	Replace backup batteries; ensure proper installation.

Reset: Remove AC power and batteries for 1 minute, then reinstall.

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