Question about Radio Shack TRC-521 CB Radio

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TRC520 CB wont power up

I can connect all the power wire to the fuse and ground out the ground wire. but it still will not turn on.

Posted by cowboypimp11 on

  • cowboypimp11 Jun 13, 2009

    well the radio itself i didnt buy it i got it for free from my buddy and i think he fried it cuz it dont work at all

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Anonymous

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Hello, First of all you only have the Power wire Red, and the ground wire Black to connect for 12v DC to power the unit. If you memory power it is usually connected to a constant power source such as the cigarette lighter or continuous 12V dc powersupply off of the battery. These are the only connections that should be connected to provide power. Since the unit will not turn on I suspect that the CB's power supply and regulator have been blown. Another possible choice is that the radio was working and someone removed the antenna cable and the the RF power amplifier malfunctioned taking the power supply and regulator with it. To solve this problem, check the voltages on the wires before connecting them to the radio (these should be the 12 volt power off of the radio circuit, and the 12 volt power off of the continuous 12V connector (or the cigarette lighter). These voltages should read 12V. Connect the CB with it turned off and measure the voltages (should be 12V) Turn the radio on and check the voltages (should be a little less than 12V) If the radio does not come on then the internal power supply of the radio might be defective (In this case I would advise taking the CB to a qualified radio repair shop) I hope this helps Thank you, Shuttle83 http://www.electron-age-technologies-llc.com

Posted on Jun 11, 2009

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If it isnt the fuse, it is the protector diode inside the radio

Posted on Jan 30, 2010

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