FunkTronic Major BOS 8a, Manual

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mbos8a_eng (13.03.2014)
- 30 -
Kompetent für Elektroniksysteme
mbos8a_eng (13.03.2014)
- 31 -
Kompetent für Elektroniksysteme
Sockets Pinout
All sockets of the Major shown from rear view.
Layout FK 1- 8 (radio channels)
ST1 - 8
RX-AF input (ea) 1
RX-AF input (earphone -) 2
squelch input (carrier) 3
GND (ground) 4
busy lines 5
( Do not connect to FuG! )
PTT output 6
(PTT out, open collector max. 100mA )
TX-AF output (mod +) 7
TX-AF output (mod -) 8
The AF- in/outputs are equipped with transformers and
hence potential-free.
Layout Power
PWR
12 VDC, max 1.5 A,
center: positive pole, ring: GND
Layout RS 232
ST10
TXD (RS232) 1
RXD (RS232) 2
GND 3
PTT input 4
ext. signal source (PTT3, to GND)
RX-AF output LS sum 5
(loudspeaker AF, activated radio channels)
RX-AF output H sum 6
(earphone AF, selected radio channels)
AF input, ext. source. Ext_AF (mod +) 7
AF input, ext. source. Ext_AF (mod -) 8
Layout TB Audio Tape
ST12
GND (ground) 1
audio tape switching contact 2
AF output A (mod. +) 3
AF output B (mod. -) 4
The AF output A-B is equipped with a transformer and
hence potential-free.
Layout I2C
ST9
power supply. (+12VDC) 1
power supply. (+12VDC) 2
SDA (I
2
C-bus-data) 3
SCL (I
2
C-bus-clock 4
GND (ground) 5
GND (ground) 6
Layout PTT
(Headset Switching)
ST14A
PTT input, HS (PTT2, to GND) 1
+batt. output., supply voltage 2
for headset-headset switching PCB
control pin 3
for headset-headset switching PCB
opto-coupler input (anode +) 4
opto-coupler Input (cathode -) 5
GND (PTT2 ground) 6
Layout Headset
ST14
PTT input HS (PTT2, to GND) 1
AF input HS (micro +) 2
AF output HS (h) 3
AF output HS-GND (headset -) 4
AF input HS-GND (micro -) 5
GND (PTT2 ground) 6
Two connectors for headsets are available. A headset
can be connected to ST14. An external PTT button (e.g.
foot switch) can be connected to ST14A.
ST9 ST10 ST12 PWR
ST4 ST1 ST2 ST3
ST14A ST14
ST8 ST5 ST6 ST7