Sony MDR-RF850RK Precautions, Troubleshooting, NAdditional information, Problem, Solution, Caring for others, Notes on headphones, Preventing hearing damage

NAdditional information

Precautions

•If the transmitter is not to be used for a long period of time, disconnect the AC power adaptor from the AC outlet by holding the plug. Do not pull on the cord.

•Do not leave the wireless stereo headphone system in a location subject to direct sunlight, heat or moisture.

Notes on headphonesPreventing hearing damage

Avoid using headphones at high volume. Hearing experts advise against continuous, loud and extended play. If you experience a ringing in your ears, reduce the volume or discontinue use.

Caring for others

Keep the volume at a moderate level. This will allow you to hear outside sounds and to be considerate to the people around you.

If you have any questions or problems concerning the system that are not covered in this manual, please consult the nearest Sony dealer.

Be sure to bring the headphones and the transmitter to the Sony dealer when requiring repair work.

Troubleshooting

Problem	Solution
No sound/	Check the connection of the audio/
Muffled	video equipment or the AC power
sound	adaptor.
	Check that the audio/video
	equipment is turned on.
	Turn up the volume on the connected
	audio/video equipment, if the
	transmitter is connected to the
	headphones jack.
	MDR-RF820RK:
	Change the radio frequency with the
	CHANNEL selector on the
	transmitter, then tune the headphones
	with the TUNE control.
	MDR-RF850RK:
	Change the radio frequency with the
	CHANNEL selector on the
	transmitter, then press the TUNE
	button again.
	The mute function is activated.
	Use the headphones near the
	transmitter.

The headphones’ POWER indicator light is weak or turned off.

•Charge the supplied rechargeable batteries or if the POWER indicator is still off after charging the supplied rechargeable batteries, take the headphones to a Sony dealer for replacement of the rechargeable battery.

If you connect the transmitter to the LINE OUT or REC OUT jacks of an audio reproducer, make sure that the NOISE FILTER switch is set to OFF.

Make sure that the NOISE FILTER switch is set to either ON or OFF (If the switch gets stuck between ON and OFF, the sound will be cut off).

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