Troubleshooting - AKG HEARO 999 AUDIOSPHERE User Instructions

6 Troubleshooting

Symptom
No sound
Mono sound
Noise
Distorted sound
Intermodulation noise
Overemphasized bass or treble
INPUT LED flashing red
Possible Cause
1. AC adapter is not connected to
HEARO and/or AC outlet.
2. HEARO is OFF or not connected to
audio source.
3. Connected audio source is
switched off.
4. Wrong input selected.
5. INPUT control is at zero.
6. Volume control on audio source is
set too low.
1. Connected audio source operates
in mono mode.
2. HEARO is not correctly connected
to audio source.
1. Audio level at HEARO input is too
low.
2. Input signal is noisy.
1. Audio level at HEARO input is too
high.
1. Electrical appliances with poor
interference protection.
2. Audio source or sound carrier
defective.
1. Bass or treble control settings on
audio source.
1. SURROUND selector at "CLUB",
"HALL", or "STADIUM" although
Dolby Digital signal is present at
input.
Remedy
1. Connect AC adapter to HEARO
and/or AC outlet.
2. Switch HEARO on or connect to
audio source.
3. Switch audio source on to feed
signal to HEARO input.
4. Activate the input that is actually
used (see sections 4.3.1 and 4.3.2).
5. Turn up INPUT control (refer to sec-
tions 4.2.1 and 4.2.2)
6. Increase audio source volume to
the point that HEARO switches on.
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.
1. Turn down audio source volume
control and/or INPUT control on
HEARO.
1. Switch off any "suspicious"
appliances (if possible).
2. Check audio source or sound
carrier.
1. Readjust bass or treble controls.
1. Set SURROUND selector to
"AUTO".