Radio Shack 21-1703 A Manual De Usuario

If your CB is not working as it should, follow these suggestions to see if you can 
eliminate the problem. If you cannot, take the CB to your local RadioShack store 
for assistance.

Symptom

Check/Try

CB has trouble receiving.

Turn the transceiver power on. See “Operation” on p. 9.

Secure connections (antenna, microphone).

Adjust squelch.

Radio may not be on an operating channel. Switch 
to an active channel.

PUSH TO TALK may be held down. Release PTT.

Adjust the volume.

CB has trouble transmitting.

Turn the transceiver power on.

Secure connections (antenna, microphone).

Check for corrosion in connections. Clean and 
tighten connections.

Radio may not be on an operating channel. Switch 
to an active channel.

PUSH TO TALK is not firmly pressed down. Press 
PTT completely.

The CB does not work at all.

Secure connections.

The fuse may need replacing. See “Replacing the 
Fuse”

 on p. 13.

Channels cannot be selected.

Set OUT CH9 CH19 to OUT.

PUSH TO TALK is held down. Release PTT.

Because the CB itself is fairly quiet, most noise you hear is probably from an 
external source in your vehicle such as the alternator, another CB, or spark plugs.

The transceiver uses an ANL (Automatic Noise Limiter) circuit to reduce noise. 
However, if possible, try to eliminate the noise by finding its source.

You can determine the noise’s source by turning off the engine and operating 
the CB with your vehicle’s ignition set to ACC. If the noise is reduced, the 
problem is in your vehicle’s ignition or electrical system. Here are a few hints to 
help you reduce or eliminate such noise.