HTX-10 10-Meter Transceiver
(190-1110)                 Troubleshooting            Faxback Doc. # 56902

If your transceiver is not working as it should, these suggestions might 
help you eliminate the problem.  If the transceiver still does not operate 
properly, take it to your local RadioShack store for assistance.

Problem            Possible Causes            Remedies 

Trouble with       The squelch might          Adjust the squelch.
Reception.         Need to be adjusted.
 
                   The transmitter might      Tune the transceiver
                   not be set to an oper-     to an operating
                   ating frequency.           frequency.

                   The microphone might       Make sure the microphone
                   not be connected.          is connected.

                   The antenna might not      Make sure the antenna is
                   be connected.              connected.

                   The receive mode might     Set the receive mode to FM,
                   not be properly set.       AM, LSB, or USB.

Trouble with       The antenna might not be   Make sure the antenna is
transmission.      connected                  connected.

                   The microphone might not   Make sure the microphone
                   be connected.              is connected.

                   The microphone's push-to-  Press the microphone's 
                   talk button might not be   button in fully.
                   fully pressed in.

                   The microphone's gain      Adjust MIC-G.
                   might not be properly set.

Transceiver        The power cord might not   Make sure the power cord
Does not work      be connected.              is connected.
At all.                    

                   The power cord's fuse      Replace the fuse (see 
                   might be blown.            "Replacing the Fuse"
                                              below).  

The transceiver should be serviced only by a qualified radio technician. 
If you still have problems, take your transceiver to a local RadioShack 
store for assistance.

Noise Reduction

Because your transceiver is exceptionally quiet, any noise you hear is 
probably from an external source in our vehicle such as your vehicle's 
alternator, radio, or spark plugs.

To solve the problem, you must go to the noise's source. You can determine 
the noise's source by turning off the engine and operating the transceiver 
with your vehicle's ignition set to ACC.  If the noise decreases, 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 transceiver 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 suppressors on your spark plugs, or install new spark 
  plugs that have built in noise suppressors.

  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 RadioShack store has a wide selection of noise suppression 
accessories. 

Replacing The Fuse

If the HTX-10 stops operating, you might need to replace the red power 
wire's fuse with the supplied spare fuse.

CAUTION:  Do not use a fuse with ratings other than those specified here.
          Doing so might damage your transceiver.

Follow these steps to replace your transceiver's fuse. 

1.  Make sure the power source and transceiver are both off. 

2.  Pull the latches apart on the fuse holder until it opens.

3.  If the fuse is blown, replace it.  Use only a standard 1-1/4 x 1/4
    inch fast-acting fuse with the proper rating.  The fuse must be 10
    amps.

    CAUTION:  The supplied fuse has the proper ratings.  Make sure you
              replace a fuse only with another fuse of the same rating.

4.  Reassemble the fuse holder by squeezing it together until it snaps 
    shut.

(BR-EB 9/29/99)

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