Operation; Switch On - Bosch PLENA LBB1938/30 Installation And Operation Manual

PLENA power amplifiers
8

Operation

8.1

Switch ON

Put the power switch on the rear of the power amplifier in the "I" position.
Figure 8.1: Power switch and power connection
0 dB
-6 dB
-20 dB
Figure 8.2: LBB1930/20, LBB1935/20 and LBB1938/x0
If mains power or backup power is available, the VU‑bar (1) on the front of the power amplifier
is lit and shows the output level of the amplifier.
If the internal temperature reaches a critical limit due to poor ventilation or overload, an
overheat protection circuit switches "OFF" the power stage. The overheat indicator (5) shows
on the front panel and the Input fault relay switches over if the power stage is switched "OFF"
by the overheat protection circuit. The Battery operation indicator (3) lights up if the mains
power supply is failing and the backup battery is in use.
Bosch Security Systems B.V.
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Installation and operation manual
Operation | en
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Status
Pilot-Tone B t a e t y r Mains
2018.11 | V1.2 | LBB193x/x0
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O e v h r e t a