INSTALLATION
2-12
Accessing Jumpers
The jumpers on the controller board are config-
ured as described in the following information and in
Table 2-1. If the default configuration must be
changed, this board is accessed as follows:
1. Remove the back cover of the remote control unit.
The audio PA board is the top board, followed by the
display controller board, and then the display board.
2. To temporarily move the audio PA board out of the
way to access the display controller board, release it
from the housing by pressing the two plastic clips on
the bottom edge.
2.6.3 SETTING MASTER/SLAVE SWITCHES
With two control units, the control unit desig-
nated as the Master controls the external or front
mount radio speaker. Switches 8 and 9 of DIP switch
S1 on the display controller board (see Figure 2-7 or
2-8) set the Master/Slave configuration of the control
unit as follows. This switches function the same on
both boards. Set these switches as indicated in
Table 2-1 if applicable.
Master = Sw 8 Off, Sw 9 On (default)
Slave = Sw 8 On, Sw 9 Off
2.6.4 CONFIGURING VOLUME CONTROL
S1-2, 3, and 10 select the volume control mode.
These switches can almost always be left in the default
mode (S1-2 and 3 = On, S1-10 = Off). Additional
information follows.
• If controlling an external speaker and the internal
speaker is not used, disable the internal speaker
by disconnecting the control unit audio PA board
from the controller board.
• If controlling the local internal speaker when
equipped with the unrevised audio PA board
(hardwired to controller board), S1-2 = Off or
R756 Out.
2.6.5 MOUNTING REMOTE CONTROL UNIT
A diagram showing a remote transceiver installa-
tion is located in Figure 2-2. The control unit
mounting bracket, 17-foot control cable, and mounting
hardware are included. Proceed as follows:
1. Check the area behind the selected mounting loca-
tion to make sure that there is nothing that will be
damaged when the mounting screws are installed.
Then install the mounting bracket using the
included self-drilling screws or others if desired.
2. Install the control unit in the bracket using the
included plastic washers, spring washers, and knobs
as shown in Figure 2-2.
3. Install the microphone hanger in a convenient loca-
tion using the included screws for sheet metal or
plastic as applicable. The hanger must be connected
to chassis ground for proper operation of functions
such as monitoring and scan. If required, ground the
hanger using the included grounding wire.
4. Route the control cable from the transceiver to the
control unit and plug it into both as shown in
Figure 2-2. With dual remotes, there are two remote
pigtails coming from the back of the radio.
2.7 CONNECTING THE SPEAKER
2.7.1 USING STANDARD INTERNAL SPEAKER
CAUTION
The audio amplifier in the transceiver is designed to
withstand momentary grounding of the speaker
outputs. However, do not connect either speaker
output to supply voltage because serious damage will
result.
Front Mount Transceiver
- Insert the plug with the
jumper from pin 1 to 3 into the accessory jack (see
Figure 2-5). This routes the audio on pin 1 back in to
the internal speaker connected to pin 3. The other inter-
nal speaker terminal is internally connected to pin 2.
Remote Control Unit
- In the standard configuration,
the internal speaker in the control unit is used, and no
special connections are required. Low level audio
from the control cable is routed to a 3-watt audio
amplifier in the control unit. The use of a separate
amplifier permits independent volume control in dual
control applications and also minimizes noise.
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