Thanks in advance for any advice, I have a cobra 29 wx that I am using as a base. It's been working great for about 6 months and all the sudden yesterday kuhpoot! It was on for about two minutes and I had not keyed it up at all yet. I have done everything I can think of to diagnose, checked leads into radio and those are good radio has power inside of plug, where my real question lies is that I took out the on/off switch and test terminals. All terminals are hot even when switch is off. Nothing on radio will turn on, is it the switch or could it be another part in the radio letting power through when it should not be?
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Cobra 29 not powering on
- Thread starter Nameless1
- Start date
i would check the audio IC to see if it has shorted out. here is a link to determine which one you have,
http://downloads.cobra.com/CB/TSB/TSB10066.pdf
http://downloads.cobra.com/CB/TSB/TSB10066.pdf
If this radio is inside the house and you're powering it with a power supply any chance the neg/pos wires had a stray wire on the power supply?
You need to check power at the back of the radio at the plug using a multimeter and then check to see if you have voltage at the volume/power switch. If there is power at the back plug but not at the power switch then you probably blew the diode.
If you have power at the power switch but the radio won't turn on then you might have a bad switch.
I am powering this unit from a 12v battery on the bench. I have power from battery through leads into radio and all the way to the switch. Here's my real head scratcher, every terminal on the on/off switch is hot with full voltage except I think the yellow wire is only reading 7v. (Officially flustered)
Just posted a very similar issue. 13.8 on my yellow also. have you had any luck replacing switch etc.?
Hey just an update on mine. Found that there was a trace that was broke on solder side of the board. It could be seen by the eye but with magnification it was obvious.
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