Radio Shack 21-1703 A manual Additional Information, Troubleshooting, Reducing Noise

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Additional Information

Troubleshooting

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.

Reducing Noise

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.

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Contents Mini Mobile CB Radio What’s IncludedProduct Features Setup OntentsProduct Features Product FeaturesOther Features Setup SetupAttaching the Microphone Holder Mounting the Transceiver Connecting an Antenna Connecting the Microphone Connecting an External SpeakerUsing Vehicle Battery Power Using the TransceiverReceiving Transmissions and Adjusting Squelch OperationOperation TransmittingUsing Common 10-Codes Operational HintsMaximum Range Troubleshooting Additional InformationReducing Noise Care and Service Replacing the FuseSpecifications ReceiverRF Emissions Limited Warranty