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application software version 3.0x requires Logic Board
firmware version 3.02 (part number 344A4245G10) or later.
If necessary, verify the proper EPROM is installed into U4's
socket.
Installation Into The PC
The Logic Board is installed in an expansion slot inside
the PC. Although it can be installed in any slot, installing it
in the slot furthest from the PC's internal power supply is
recommended. If field installation is necessary, follow this
procedure:
1. Review the procedures in the documentation
included with the PC related to expansion board
installation.
2. If necessary, power-down the PC and disconnect
it from the ac power source.
3.
Remove the outside cover from the PC in
accordance with the manufacturer's instructions.
4. Select an empty expansion slot and remove the
respective rear cover plate. Retain the hold-down
screw. Discard the rear cover plate.
5.
Install the Logic Board in the selected expansion
slot. Secure it with the hold-down screw.
6. Replace the outside cover.
PLUG-IN RS-422 BOARD (Optional)
If the PC is equipped with a plug-in RS-422 capable
board, see the section entitled "INTERCONNECTING
THE
EQUIPMENT",
INTERCONNECTIONS" for set-up information.
AUDIO TOWER
All necessary slide-in boards are installed in the Audio
Tower before the C3 Maestro console system ships from the
factory. If the console system is ordered with multiple
unselect speakers (2 or 3) or with the Call Director patch
option, two Audio PA Boards are installed. DIP switches
and jumpers/plugs located on the Audio Matrix and Audio
PA Boards are factory configured for standard console
installations. The following information lists the normal
factory settings and the optional settings which are available.
Audio PA Board(s)
SW1 − − Maximum Speaker Power Level DIP Switch
Switch SW1 on the Audio PA Board provides a method
to limit the maximum audio output from each speaker power
amplifier. Maximum levels of 5 watts or 8 watts are
available. Normally, the factory setting is 5-watts. This level
subsection
"CEC/IMC
is recommended, as it should be adequate in nearly all
dispatch environments. Table 2 indicates the available
settings and Figure 4 shows the 5-watt factory setting. These
switches have no effect on headset earphone output levels.
NOTE
SW1 is not present on Audio PA Board
P29/5000055000. Both speaker power amplifiers
on this earlier board (sometimes referred to as a
"Phase 1" board) are hardwired for 8 watts
maximum output. See LBI-38716 for details.
TABLE 2 − − AUDIO PA BOARD
MAX. SPEAKER POWER LEVEL SELECTION
SW1
POSITION
1
2
3
4
OFF
OFF
x
x
ON
OFF
x
x
OFF
ON
x
x
ON
ON
x
x
"x" = either position
ON
1
Figure 4 − − Audio PA Board SW1 Factory Setting
SW2 − − Audio Source DIP Switch
During normal console operations, SW2 positions 1 and
3 should always be "ON" or "CLOSED" and SW2 positions
2 and 4 should always be "OFF" or "OPEN". Figure 5
shows this setting.
For test procedures, SW2 positions 1 thru 4 may be
inverted to shift the Speaker A and Speaker B audio
amplifiers' source audio from the Audio Matrix Board
(normal) to Line A and Line B balanced inputs (test),
respectively. See LBI-39064 for specific details. With this
test setting, audio signals on the line inputs are applied
directly to the speakers' power amplifiers without being
routed through the Audio Matrix Board.
LBI-39055
NOTE
MAXIMUM
OUTPUT
SPKR A
SPKR B
5 Watts
5 Watts
8 Watts
5 Watts
5 Watts
8 Watts
8 Watts
8 Watts
4
2
3
5
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