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.

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Test the internal speaker to see that sound is indeed getting to it.Hook an external speaker to it and see if that 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

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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

Posted on May 14, 2008

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SOURCE: radio shack trc-502 cb radio





Posted on Feb 21, 2009

  • 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

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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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Trc 481 manual

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:

Realistic TRC-481 (210-1550)

Jul 26, 2012 | Radio Shack Trc-481 Cb Radio

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I have a TRC 502A CB radio that hasn't been used in about 5 yrs. I recently tried to use it and when I transmitted, the audio came thru the speaker. Any idea what's wrong?

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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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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