AKG Acoustics HEARO 999 AUDIOSPHERE II Mode D'emploi page 23

Symptom
Mono sound
Noise
Distorted sound
Intermodulation noise
Headphones receive unwanted trans-
mitters
Overemphasized bass or treble range
Beep sounds heard on wireless head-
phones
Momentary reception dropouts
(crackling)
INPUT LED flashing red.
6 Troubleshooting
Possible Cause
1. Connected audio source operates
in mono mode.
2. Transmitter is not correctly
connected to audio source.
1. Audio level at transmitter input is
too low.
2. Input signal is noisy.
3. Batteries in wireless headphones
are low.
1. Audio level at transmitter input is
too high.
2. Batteries in wireless headphones
are low.
1. Electrical appliances with poor
interference protection.
2. Audio source or sound carrier
defective.
1. A neighbor uses similar UHF head-
phones.
1. Bass or treble control settings on
audio source.
1. Transmitter and headphone carrier
frequencies do not match.
2. No or weak reception.
1. Interference from other equipment.
2. Signal too weak due to reception
disturbances.
1. SURROUND selector at "CLUB",
"HALL", or "STADIUM" although
Dolby Digital signal is present at
input.
Remedy
1. Switch audio source to stereo
mode.
2. Check cable connection between
HEARO and audio source.
1. Turn up audio source volume con-
trol and/or INPUT LEVEL control on
HEARO.
2. Check audio source.
3. Charge batteries.
1. Turn down audio source volume
control and/or INPUT control on
HEARO.
2. Charge batteries.
1. Switch off any "suspicious"
appliances (if possible).
2. Check audio source or sound
carrier.
1. Set FREQ. selector on HEARO and
frequency selector on headphones
to same channel.
1. Readjust bass or treble controls.
1. Set FREQ. selector on HEARO and
frequency selector on headphones
to same channel.
2. Change listening position, move
closer to transmitter.
1. Use FREQ. selector on HEARO and
frequency selector on headphones
to change carrier frequency.
2. Change listening position, move
closer to transmitter.
1. Set SURROUND selector to
"AUTO".
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