Question about Cobra 18 Wx St Ii Mobile Cb Radio

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My cobra 29 NW/WX won't power up.

I run it in a loader at a quarry and has worked fine for some time till one day when i turned it on, it powered up for about 3 seconds and then hasn't powered back up since. i took it to my bench and put a power supply on it and it still won't power on. i replaced D23 which is supposed to be the circut protection diode but to no avail. any suggestions what i should do in this situation? What should i look for? I tryed to power my brand new cobra18wx st 2 up with a brand new 12v batterie, but it only make a tic...tic...tic sound? how can i make this work?

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Could be a lot of things. could be the audio chip. radio could be toast. its not something some one can tell you how to fix on fixya.

it needs a radio tech.

Posted on Oct 01, 2009


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Also, if you never checked the SWR, and you noticed the ant ligh come one ever, you could have burned up your final. You now have a paper weight.

Oh and the protection diode is D28 not 23. It should be a big black one. Also, D8 is another protection diode. they are the only big black diodes in the radio.

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