Troubleshooting; Customer Service - Bosch PLENA Series Operation Manual

PLENA Mixer amplifier, 4-zone, 240W
8

Troubleshooting

Problem
Amplifier does not work and
power LED is not illuminated.
No audio.
The audio output sound is
distorted or sounds strange.
8.1

Customer service

If a fault cannot be resolved, please contact your supplier or system integrator, or go directly
to your Bosch representative.
Bosch Security Systems B.V.
Possible cause
– Power (plug) is
disconnected and/or the
unit is switched off.
– An audio output cable
has come loose or has
not been properly
plugged in.
– Input source is not
working correctly.
– The audio output cable
has not been properly
plugged in.
– The correct cables have
not been used.
– The input level is
clipping.
– Music source signal level
is not correct.
Operation manual
Troubleshooting | en
Possible solution
– Insert power cord and
switch on the unit.
– Check all input and
output audio
connections, plug in
audio cables properly.
– Check the input source
is working correctly and
sending an appropriate
level of signal.
– Check all connections
are plugged in properly.
– Use correct cable type
for input and output.
– Turn down the input
signal level using the
level control knob or the
master volume control
knob.
– Increase signal level for
the source or change the
source.
2019-03 | V1.1 |
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