Technical Manual
FT420
– Iss 2.4
31
2.9.2 OWS Display Board SUB888
The main components on the OWS Front Display board comprises LED indicators, momentary
switches, an electret MIC and two IDC sockets which connects to the Generic Display Driver board.
The board layout is shown in Figure 10.
Figure 10 OWS Front Display Board Layout
There are no jumper settings required for this board. The board connections are listed on Table 20.
Table 20 OWS Front Display Board Connections
9
Designator
Type
Pin
Usage
Label
Description
CON1
IDC14 socket
Connection to the generic
display driver board.
N/A
Plug-in connections. The two boards
shall be fastened with four metal
spacers.
CON2
IDC26 socket
N/A
CON3
Low profile
screw terminal
block on the
back of the
board
1
Electret microphone
connection
+
Connects to the MIC input of the Main
Display Driver board if built-in MIC is
used.
2
-
3
Microphone shielding
connection
G
The MIC cable (two core audio cable)
should be shielded. The shielding
should be connected to this terminal.
The other end of the shielding should
be left unconnected.
2.9.3 Other optional Front Display boards
Similar to the OWS Front Display board, the other Front Display boards comprises main components
such as LED indicators, momentary switches, 2 IDC sockets that connect to the Generic Display
Driver board.
9
Table Abbreviation: “Pin” = Pin No., “+” = Positive, “-” = Negative, “G” = Ground, “N/A” = Not Applicable.
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