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Problem
No sound/
Muffled
sound
Distortion
Solution
Check the position of the
BALANCE control (MDR-IF
520RK only).
Check the position of the
SURROUND button (MDR-
IF520RK only).
If the transmitter is
connected to the headphones
jack, turn down the volume
of the connected audio/
video equipment.
The headphones’ power
indicator light is weak or
turned off.
Charge the rechargeable
battery because the
headphones’ battery is
weak, or if the power
indicator is still off after
charging the battery, take
the headphones to a Sony
dealer for a replacement
of the rechargeable
battery.
If you are using the
conventional dry battery,
replace it with a new one.
Check if the INPUT
SOURCE selector is set to
the right position.
Problem
No sound/
Muffled
sound
Solution
Check the connection of the
audio/video equipment or
the AC power 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.
The mute function is
activated.
Check if there is any
object between the
transmitter and the
headphones.
Use the headphones near
the transmitter.
Change the position and
angle of the transmitter.
The headphones’ power
indicator light is weak or
turned off.
Charge the rechargeable
battery because the
headphones’ battery is
weak, or if the power
indicator is still off after
charging the battery, take
the headphones to a Sony
dealer for a replacement
of the rechargeable
battery.
If you are using the
conventional dry battery,
replace it with a new one.
Check if the INPUT
SOURCE selector is set to
the right position.
Troubleshooting
14


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