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SERVICE MANUAL SYSTEM RX 4000
January 2009
Version 1.9
Page 19 di 87
3.1.5
IB 4121-BGM background music Input board
Audio signal inputs
(stereo to mono: the channels left (L) and right (R) are mixed together).
DIP switched to adjust the input level (1-2) and 2 enable commands (3-4).
Switch 1
Switch 2
Value
OFF
OFF
- 18 dB
ON
OFF
- 12 dB
OFF
ON
- 6 dB
ON ON
0 dB
IB 4121 BGM specifications:
Dimensions: 155x80x25 mm.
Weight: 0.1 kg
Power input: 20 ÷ 32 V dc
Consumption (current): 16 mA
Opto-isolator max. voltage: 32 V dc
Max. current: 25 mA
Summary of Contents for RX 4000
Page 16: ...SERVICE MANUAL SYSTEM RX 4000 January 2009 Version 1 9 Page 16 di 87 Block diagram...
Page 26: ...SERVICE MANUAL SYSTEM RX 4000 January 2009 Version 1 9 Page 26 di 87 Block diagram...
Page 40: ...SERVICE MANUAL SYSTEM RX 4000 January 2009 Version 1 9 Page 40 di 87 Electrical Schematics...
Page 42: ...SERVICE MANUAL SYSTEM RX 4000 January 2009 Version 1 9 Page 42 di 87 Wall mounting PCB layout...
Page 45: ...SERVICE MANUAL SYSTEM RX 4000 January 2009 Version 1 9 Page 45 di 87 Connection Diagram...
Page 63: ...SERVICE MANUAL SYSTEM RX 4000 January 2009 Version 1 9 Page 63 di 87...