Sony TFM-850W Radio User Manual

The Sony TFM-850W is a portable AM/FM radio featuring a built-in speaker, telescopic antenna, tuning dial with AM/FM bands, volume control, tone adjustment, battery operation (with optional AC adapter), headphone jack for private listening, and carrying handle. Designed for reliable reception and clear sound quality. 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. Operating the Radio 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: AM/FM tuner, built-in speaker, telescopic antenna, tuning dial, volume control, tone knob, battery compartment, headphone jack, carrying handle.

Feature	Description
Telescopic antenna	For improved FM reception; extend fully for best results
AM/FM band selector	Switch between AM and FM radio bands
Tuning dial	Manual tuning with frequency scale
Volume control	Adjusts sound output level
Tone control	Adjusts bass/treble response
Headphone jack	For private audio listening (3.5mm)
Carrying handle	Integrated handle for portability
Battery compartment	Holds batteries for portable operation
AC adapter jack	For optional AC power operation
Power switch	Turns radio on/off

Installation

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

Install batteries: Open battery compartment, insert batteries observing correct polarity (+/-).
Extend antenna: Fully extend telescopic antenna for FM reception.
Connect AC adapter (optional): Plug adapter into DC jack and wall outlet.
Position radio: For best AM reception, rotate radio; for FM, adjust antenna direction.

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

First-Time Setup

Power on radio; follow these steps for initial use.

Select band: Switch to AM or FM as desired.
Tune station: Turn tuning dial slowly to find station; fine-tune for clearest sound.
Adjust volume: Set volume to comfortable level.
Adjust tone: Set tone control to preferred sound character.
For headphones: Plug into headphone jack for private listening.

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

Specifications

Bands: AM (530–1710 kHz), FM (88–108 MHz).
Speaker: Built-in dynamic speaker.
Power Source: 4 x D batteries (not included) or optional AC adapter (DC 9V, 500mA).
Headphone Output: 3.5mm stereo jack.
Antenna: Telescopic for FM; internal ferrite bar for AM.
Controls: Power switch, band selector, tuning dial, volume, tone.
Dimensions: Portable design with carrying handle.
Operating Temp: 0°C to 40°C (32°F to 104°F).

Controls and Settings

All controls are located on front/side panels.

Front Panel: Power switch, band selector (AM/FM), tuning dial, volume knob, tone knob.

Tuning: Turn dial slowly to desired frequency; use fine-tuning for clearest reception. Volume: Adjust clockwise to increase. Tone: Adjust for more bass (counter-clockwise) or treble (clockwise). Power: Switch to ON position; ensure batteries are installed or AC adapter connected.

Connecting Devices

Headphones: Plug into 3.5mm jack. AC adapter: Use Sony-approved adapter only.

Turn off radio before connecting/disconnecting devices.
Insert headphone plug fully into jack.
Connect AC adapter to DC jack and wall outlet.

Tip: Use headphones to listen privately; disconnecting headphones restores speaker sound.

Operating the Radio

Supports AM and FM band reception.

Power on: Switch power to ON.
Select band: Choose AM or FM.
Tune: Turn tuning dial to desired station; adjust for clearest signal.
Adjust volume/tone: Set to preferred levels.
For best reception: Extend antenna fully for FM; rotate radio for AM.
Power off: Switch to OFF when not in use to conserve batteries.

WARNING! Do not force controls; tune gently. Avoid placing near metal objects that may interfere with reception.

Accessibility Features

Headphone jack allows private listening for users with hearing aids or in quiet environments. Large, tactile controls aid users with visual or dexterity impairments.

Care & Cleaning

Remove batteries before cleaning. Use dry, soft cloth; do not use liquids or abrasive cleaners.

CAUTION! Never spray liquids directly on radio; keep away from heat sources and water.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Sony Corporation; all trademarks belong to Sony. 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	Dead batteries/power switch	Replace batteries; ensure power switch is ON; check AC adapter connection.
Poor reception	Antenna position/location	Extend FM antenna fully; rotate radio for AM; move to location with better reception.
Distorted sound	Volume too high/batteries low	Reduce volume; replace batteries.
No sound from speaker	Headphone plugged in/mute	Unplug headphones; check volume setting.
Cannot tune stations	Band selector/dial	Ensure correct band selected; tune dial slowly across frequency range.

Reset: Power off and remove batteries for 1 minute, then reinstall.

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