Question about Uniden GRANTLT 40-Channels Base CB Radio

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Neeed a circuit diagram on a uniden grant lt need to find out where 2 speaker wires go on the board

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You can get one at Cbtricks.com Take off the cover, with circiut side down, look in the right side corner, they will be marked as SP hope this helps

Posted on Mar 03, 2010

  • 2 more comments 
  • JOHN BABA Mar 03, 2010

    You can get one at Cbtricks.com Take off the cover, with circiut side down, look in the right side corner, they will be marked as SP hope this helps

  • JOHN BABA Mar 03, 2010

    You can get one at Cbtricks.com Take off the cover, with circiut side down, look in the right side corner, they will be marked as SP hope this helps

  • JOHN BABA Mar 03, 2010

    You can get one at Cbtricks.com Take off the cover, with circiut side down, look in the right side corner, they will be marked as SP hope this helps

  • JOHN BABA Mar 03, 2010

    You can get one at Cbtricks.com Take off the cover, with circiut side down, look in the right side corner, they will be marked as SP hope this helps

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Uniden grant


I had this same problem on a Realistic Navaho, TRC-30A that I purchased in the mid 70's (I still have it by the way).

The cause of my radio to do this was a shorted diode in the keying circuit on the main board. The shorted diode effectively did the same as keying the microphone.... without the microphone being connected.

You need to find the schematic for your radio and check for shorted components on the keying line. If you don't have a schematic, you can unplug the radio and use a ohmmeter and check for a shorted diode or transistor in the keying circuit.

Please let me know if I can be of further assistance to you.

Good luck!
- Jim

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