Question about Radio Shack Trc-481 Cb Radio

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TRC-481 No sound

We have a TRC-481 CB Radio. No audio is coming out from the unit. It is receiving and transmitting, but just no audio is coming from the radio itself. Is this a speaker problem? Connection? Something I can fix, or trash the unit? Thanks.

Posted by Anonymous on

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  • Radio Shack Master
  • 1,795 Answers

Test the internal speaker to see that sound is indeed getting to it.Hook an external speaker to it and see if that works.you just may have to change the speaker but it could be more than that. Do thisfor now then repost as to what you did and whether it worked or not because there is more problems and they are internal. Just go with this for now and if it doesn't work you may have to get it to a tech to repair it.

Posted on Feb 23, 2015

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Posted on Jan 02, 2017

  • 13433 Answers

SOURCE: Radio Shack TRC-502 cb radio

Here is the owners manual I'l see if I can get my hands on a internal schematic

http://support.radioshack.com/support_electronics/doc62/62220.pdf

Posted on May 14, 2008

  • 55 Answers

SOURCE: radio shack trc-502 cb radio

YOU CAN GET SCHEMATICS FOR THAT MODEL
I JUST LOOKED IT UP FOR YOU........THE BOOK IS SAMS PHOTO FACT...WEBSITE IS

WWW.SAMSWEBSITE.COM

THEY HAVE EVERY CB RADIO EVERY MADE

GOOD LUCK

Posted on Feb 21, 2009

longbow243
  • 103 Answers

SOURCE: Radioshack TRC-503 CB radio

First, use an ohm meter and test the power wires for continuity. If they test good then there is a protection diode on the board that is probably blown. If I remember right it is a 1N4001 diode. Generally you can see if its blown as it will either be burnt or look like its cracked. If it is you will need to replace that diode to restore power.

Posted on Aug 28, 2009

  • 141 Answers

SOURCE: how many amps does a Reakistic CB radio TRC-474

4 amps MAX

Posted on Jan 30, 2010

steve132003
  • 98 Answers

SOURCE: I have a TRC 502A

it could be grounded inside...Somebody may had it set for Talkback features.. Take it apart look for speaker wires (see if soldered to resistors) if its shorted seperate wires ..just have speakers wires attached. Try external SPKR. Try different mics or radio may have gone bad completely.

Posted on Apr 07, 2011

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Insure that you can receive transmitting stations.
• Be sure you are pressing the talk button

all the way in

• Make sure CB/PA is set to CB.

• have a check on cable and PL259 connectors

• Insure that the antenna resonates on the same operating

frequency of your radio, that is 11 meters


To determine if you have a bad finals, only your neighbor

@ about 20 ft can hear you.



For your manual:

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it could be grounded inside...Somebody may had it set for Talkback features.. Take it apart look for speaker wires (see if soldered to resistors) if its shorted seperate wires ..just have speakers wires attached. Try external SPKR. Try different mics or radio may have gone bad completely.

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I need to know the wiring schematic of the microphone ( what wire is what)


Hi, my name is John. Welcome to FixYa. Pin #1-Shield,Pin #2-no connection, Pin#3- Transmit- RED, Pin #4- Audio- white, Pin #5- Black- Receive......Good luck and thanks for choosing FixYa....John

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