Operating instructions

english
2322
6. Trouble Shooting
If a problem occurs, please check the items below before taking the set for
repair.
If you are not able to solve a problem by following these hints, please contact
your beyerdynamic dealer.
Warning:
Do not try to repair the set yourself, as this would invalidate the
warranty.
7. Technical Specifications
Transmitter
Power supply. . . . . . . . . . . . . . . . . . . AC/DC adapter 12 V / 300 mA
Transmission frequencies . . . . . . . . . . 8 channels in the 2.4 GHz range,
9 MHz channel spacing, switchable
Modulation . . . . . . . . . . . . . . . . . . . . digital
Input impedance . . . . . . . . . . . . . . . . > 10 kΩ
Operating distance . . . . . . . . . . . . . . up to 20 m (at clear sight)
Signal-to-noise ratio . . . . . . . . . . . . . > 85 dB (A)
Switching on. . . . . . . . . . . . . . . . . . . automatic at input signal > 10 mV
Switching off. . . . . . . . . . . . . . . . . . . automatic after approx. 2 min at
input signal < 5 mV
Dimensions . . . . . . . . . . . . . . . . . . . . 95 x 75 x 17 mm
Weight . . . . . . . . . . . . . . . . . . . . . . . 65 g
Headphone
Transducer type. . . . . . . . . . . . . . . . . dynamic
Operating principle . . . . . . . . . . . . . . closed
Frequency response. . . . . . . . . . . . . . 20 - 20,000 Hz
Max. SPL . . . . . . . . . . . . . . . . . . . . . . 113 dB
T.H.D. . . . . . . . . . . . . . . . . . . . . . . . . ≤ 0.5%
Sound coupling to the ear. . . . . . . . . circumaural
Headband pressure . . . . . . . . . . . . . ~ 2 N
Power supply. . . . . . . . . . . . . . . . . . . 2 x 1.2 V NiMH rechargeable battery
AAA, 1000 mAh
Operating time . . . . . . . . . . . . . . . . . approx. 6 hours
Weight (with batteries) . . . . . . . . . . . 270 g
Problem Possible Cause Solution
No audible signal Headphone is not
switched on
Batteries in the
headphone are not
inserted correctly
Volume of the
headphone is turned
down
Power adapter is not
connected correctly
Audio source is not
turned on
Volume control of the
audio source is turned
down
NiMH batteries in the
headphone are not char-
ged
Headphone channel does
not correspond
to the transmitter chan-
nel
Switch on the
headphone with the
On/Off button 
Insert the batteries
according to the polarity
marks
Increase the volume of
the headphone
Check the power
adapter connection
Turn on the audio source
Turn the volume
control on the audio
source up
Recharge the batteries
Press the channel
button  of the
headphone to start
the automatic channel
search
Signal only on one side
of the headphone
Plug of the audio
cable is not connected
properly
Check the audio cable
and connect the plug
properly
Signal distorted Interference caused by
other units
Change the transmission
frequency of the
transmitter and press the
channel button  of the
headphone
Problem Possible Cause Solution
Signal distorted Adapter cable is not pro-
perly connected to the
audio cable
Make sure that adapter
and audio cable are
properly connected. If
necessary return the
cables for repair.
Distorted sound Batteries inside the head-
phone are empty
Volume of the audio
source is too high
Recharge/replace the
batteries
Reduce the volume
This symbol on the product, in the instructions or on the
packaging means that your electrical and electronic equipment
should be disposed at the end of its life separately from your
household waste. There are separate collection systems for
recycling in the EU. For more information, please contact the
local authority or your retailer where you purchased the product.
8. Disposal