Bosch PLENA Series - Troubleshooting; Customer service

PLENA Mixer amplifier, 4-zone, 240W Troubleshooting | en 19
Bosch Security Systems B.V. Operation manual 2019-03 | V1.1 |
8 Troubleshooting
Problem Possible cause Possible solution
Amplifier does not work and
power LED is not illuminated.
– Power (plug) is
disconnected and/or the
unit is switched off.
– Insert power cord and
switch on the unit.
No audio.
– An audio output cable
has come loose or has
not been properly
plugged in.
– Input source is not
working correctly.
– 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.
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 signal level
is not correct.
– 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.
8.1 Customer service
If a fault cannot be resolved, please contact your supplier or system integrator, or go directly
to your Bosch representative.