Sony MDR-RF5000K Operating Instructions Manual page 26

Symptom
A repeated beep
sounds.
Other devices
(wireless LAN,
cordless phone,
etc.) using 2.4 GHz
frequency around
the transmitter
become unusable.
GB
26
Additional Information
Cause and remedy
, The headphones cannot receive the signal from the transmitter.
• Move within the RF signal transmission area.
• Check the connection of the transmitter, AC power adaptor, and AC outlet.
• Check if there is any wireless apparatus using 2.4 GHz frequency, or a
microwave oven around the transmitter and headphones.
• Change the position of the transmitter.
, There is no audio signal input for about 5 minutes and RF signals are not
transmitted.
• Input the audio signal to the transmitter and press TUNE/ID SET on the
headphones once.
, Additional headphones are being charged.
• Remove the additional headphones from the transmitter.
, If the wireless LAN uses the 2.4 GHz frequency, change the channel. If
possible, use 5 GHz.
, Keep the transmitter more than 2 m away from other devices (wireless LAN,
cordless phone, etc.) using the 2.4 GHz frequency.
, While any other devices (wireless LAN, cordless phone, etc.) using the
2.4 GHz frequency are operating, press TUNE/ID SET on the transmitter
once, and then press TUNE/ID SET on the headphones once.
The transmitter detects the optimum frequency for transmitting and switches
to it automatically.
If the problem is not solved, repeat the above procedure.