Question about Cobra 148 GTL 120-Channels Base CB Radio

142 GTL no sound

Tried 3 working mics, no audio at all, AM or SSB. I hear a slight sound from the speaker. External speaker no sound either. TX is perfect, and I can see I am receiving by the meter swing, I've just got no sound. I suspect an audio chip went bad>

Chris Kurdt Jun 07, 2007

No go, same thing. Since I'm pretty new at this, troubleshooting that is, what's the partnumber for the Audio IC chip so I can have it replaced?

3 Answers

Anonymous

I actually found the problem to this, a capacitor (10v) went bad, replaced it and it's perfect now! Thanks!

Posted on Jul 07, 2007

matt_lynch19 Oct 21, 2010

which EXACT capacitor went bad? I'm having same problem with my 2000. I can hear only (very low) through the "aux" jack for sound and i can transmit audio perfectly and PA function transmits audio also but nuttin from headphones or speaker. I can also see signals comin in on meter i modulation meter swings when i talk. People can hear me fine but i cannot hear them.

Anonymous

Part number is TA7222P 10 pin in line chip with radio faceing you part side up look on right side of chassie tward the back it's mounted on the board but fastened to the chassie use heat sink compound on new one when replaceing it and that's only if your SEAKER checks out okay!

Posted on Jul 07, 2007

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3,130 Answers

Yeppers you have a common problem of the audio output IC being bad or a defective speaker. If there is an external speaker jack, try another speaker just to make sure. Good Luck

Posted on Jun 07, 2007

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Initially, the speaker of course has been checked?

Offhand, would partial schematic of the mic and speaker section help?