Problem

Solution

Distortion

If the transmitter is connected to the

 

headphone jack, volume of the

 

connected audio/video equipment.

 

 

 

Change the radio frequency with the

 

CHANNEL selector on 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 LINE

 

OUT or REC OUT jacks of an audio

 

reproducer, make sure that the NOISE

 

FILTER switch is set to OFF.

 

 

Loud

Move closer to the transmitter. As

background

you move away from the transmitter,

noise

more noise is likely to be heard.

 

 

 

If the transmitter is connected to the

 

headphones jack, turn up the volume

 

of the connected audio/video

 

equipment.

 

 

 

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 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.

Specifications

General

Carrier frequency

 

863.5 – 864.5 MHz

Channel

Ch1, Ch2, Ch3

Modulation

FM stereo

Frequency response

 

MDR-RF820R : 20 – 20,000 Hz

 

MDR-RF850R : 10 – 22,000 Hz

Transmitter TMR-RF850R

Power source

DC 9 V: supplied AC power

 

adaptor

Audio input

phono jacks/stereo mini jack

Dimensions

Approx. 133 ⋅ 124 ⋅ 136 mm

 

(5 1/4 ⋅ 5 ⋅ 5 3/8 in.)

 

(w/h/d)

Mass

Approx. 195 g (7 oz.)

Headphones MDR-RF820R, MDR-RF850R

Power source

Supplied rechargeable nickel-

 

metal hydride batteries BP-

 

HP550 or commercially available

 

(size AAA) dry batteries

Mass

Approx. 270 g (9.6 oz.) incl.

 

batteries

Design and specifications are subject to change without notice.

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