Troubleshooting
Problem Possible cause Possible solution
DSP matrix mixer or
amplifier: does not work and
power LEDs are not
illuminated.
– Power (plug)
disconnected and/or the
unit is switched off
– Insert power cord and
switch on the unit.
DSP matrix mixer or
amplifier: No audio.
– An audio output cable
has come loose or has
not been properly
plugged in.
– Within the PC GUI
controls the input or
output levels have been
muted or reduced to a
very low level.
– Input source is not
working correctly.
– Check all input and
output audio
connections, Plug in
audio cables properly.
– Check the audio levels in
the PC GUI are not
muted or set to a level
that is too low.
– Check the input source
is working correctly and
sending an appropriate
level of signal.
DSP matrix mixer or
amplifier: The audio output
sound is distorted or sounds
strange:.
– The audio output cable
has not been properly
plugged in.
– The correct cables have
not been used.
– The input level is
clipping.
– Music source material is
not correct.
– Check all connections
have been made and
plugged in properly.
– Check the recommended
cables have been used.
– Turn down the input
level in the PC GUI
configuration screen.
– Switch music source.
Amplifier: Fault light
constantly ON ( Red).
– Indicates a fault with
that amplifier channel.
– Send immediately for
service and/or contact
the Bosch authorized
dealer or installer for
assistance.
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PLENA matrix Troubleshooting | en 41
Bosch Security Systems B.V. Operation manual 2013-06 | V1.0 |