User Manual Part 1

1. Check the area behind the selected mounting location 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 location 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 internal 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.

NOTE: The two wires on the transceiver end of the control cable are not used in this

application, so they should remain unconnected.

2.7.2 USING AN OPTIONAL EXTERNAL SPEAKER

If an optional external speaker is used, it should be a 4-Ω, 15-watt speaker such Part No.

250-0151-006 shown in Figure 2-1 or 2-2. Proceed as follows to connect this speaker:

1. The external speaker is connected to Pins 1 and 2 of the accessory connector shown in

Figure 2-5 (the order is not important). If installing the -006 speaker, pins are already installed on

the speaker wires. Locate the connector included in the accessory wire kit that does not have pins

1 and 3 jumpered and insert one pin into the Pin 1 location and the other into the Pin 2 location.

2. If installing some other speaker, use the 2-foot (0.6-meter) or 22-foot (6-meter) wire

assemblies included in the accessory wire kit as required.

NOTE: In dual control/remote applications, this speaker can be controlled by either the