Controls And Connections (Front); Controls And Connections (Rear) - Bosch LBB 1920 Installation And Operating Manual

Plena Universal Pre-amplifier | Installation and Operating Manual |

1. 1 Controls and connections (front)

Plena Universal Pre-amplifier
1/Line
1 0 dB
-6 dB
-20 dB
2
Power
3
Figure 1.2
1 VU meter (LED bar)
2 Power on indication LED (green)
3 Power on/off
4 Tone control, channel 1 to 4

1.2 Controls and connections (rear)

9
Dir.Out1 Dir.Out2
3 1
1- 3
5 4
4 5 2
1/Line
1 2
Figure 1.3
1 DIN (priority) input, channel 1 to 4
2 XLR input, channel 1 to 4
3 Cinch input, channel 1 to 4
4 Tape output (Cinch)
5 Earth connection screw
6 Emergency relay output (terminal
7 24 V DC backup power input (terminal
8 24 V DC output (terminal)
9 XLR for direct output, channel 1 to 4
Bosch Security Systems | 2003-09 | 3922 988 99482en
5 5
2/Line
4 4
9 9 9 10
Dir.Out3 Dir.Out4
Ins/Casc
+ +
GND GND
1 2
2 - 1 - 1- 3
1- 3
3 3
4 5
4 5
2/Line
3 1 2 3
About the equipment
5 5
3/Line 4/Line
4 4
5 Volume, channel 1 to 4
6 Master volume
7 Channel selection for headphone
8 Headphone connection
11 12 13
Ins/ Casc / Emgln Ins/ Casc Out Master Line Out
1- 3
4 5
3/Line
1 2 3 1
10 Insertion/ cascade switch
11 Insertion/ cascade / emergency input
12 Insertion/ cascade output
13 Master Line output (XLR)
14 Master Mic output (DIN, priority)
15 Mains voltage 115/ 230 V switch
16 Mains socket
17 Mains fuse
6 7
Master
Select
3
2 4
1
0
14
Master Mic. Out
LBB 1920/00
Apparatus delivired
8900 192 00005
connected for 230V-
115/230V~,50/60Hz
No.
Rated input
1-
3 power: 25VA
4 5
Warning T0,5AL250V
This apparatus must be earthed
L
EMG Out
R
4/Line +24V-
2 3 4 5 6 7
en | 8
8
Master
15
115V 230V
16
17
DC In DC Out
+24V-
8