TRC-485  40-Channel AM/SSB CB Transceiver
(210-1577)                 Troubleshooting            Faxback Doc. # 33141

If at any time you suspect that your CB is not working as it should,
refer to the following chart to see if you can eliminate the problem.

Symptom                      Solution

Trouble with reception       Too much squelch? Adjust as needed.

                             Radio not on operating channel? Switch to
                             active channel.

                             Microphone connected? Secure connections.

                             Antenna connected? Secure connections.

                             Mode switch setting? Select appropriate 
                             position AM, LSB USB).

                             Transmission cable connected to antenna?  
                             Secure antenna connector.

Trouble with transmission.   Transmission cable connected to antenna?  
                             Secure antenna connector.

                             Antenna fully extended?  Extend to full length.

                             All connections free of corrosion?  Clean and
                             tighten.

                             Talk button fully pressed in? Press completely.

                             Microphone connector loose?  Firmly press in 
                             jack.

Radio does not work at all.  Power connected? Secure connections.

                             Microphone connected?  Secure connections.

                             Fuse needs replacing? Replace with identical
                             fuse.

If these solutions do not solve the problem, do not attempt repairs or
adjustment yourself.  The CB should be serviced only by a qualified radio
technician.  If you still have problems, take your CB to a local Radio
Shack store for assistance.


REDUCING NOISE

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

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:

  Make all CB power and antenna wires as short as possible.

  Route the power wires away from the antenna wires.

  Be sure that the chassis ground connection is secure.

  Replace old ignition wires with new high-voltage, noise suppression wires.

  Install noise suppressers on your spark plugs, or install new spark plugs 
  that have built-in noise suppressers.

  If problems persist, check your alternator/generator and regulator
  gauges.  You can reduce the noise from these sources by using bypass
  capacitors at the various output voltage points.

Your local Radio Shack store has a wide selection of noise suppression
accessories.


(LB/EB 5/16/96)