cobra 148gtl no sound

scott3696 · Post by **scott3696** » Sunday 30th Mar 2008, 10:00

i have a 148gtl made in taiwan it transmit and recieves according meter but no sound through internal speaker or external speaker. i've changed mics no difference, i also changed ic5 chip no difference except that chip gets warm now where before it didnt. any clue or help. thanks.

magsy · Post by **magsy** » Sunday 30th Mar 2008, 14:28

check the ic 6 ta7222p is a audio amp

scott3696 · Post by **scott3696** » Sunday 30th Mar 2008, 15:16

yeah what do i need to check on ic 6

scott3696 · Post by **scott3696** » Sunday 30th Mar 2008, 15:26

i also noticed if i put two or three of my fingers on board just right i could here some sound

scott3696 · Post by **scott3696** » Monday 31st Mar 2008, 11:14

i changed that ic chip mentioned before now the ic gets hot and still no sound

Rick · Post by **Rick** » Tuesday 1st Apr 2008, 20:49

Try unsoldering one side of R87 and D65 to see if the audio returns.

scott3696 · Post by **scott3696** » Friday 4th Apr 2008, 14:53

hey rick thanks for info but it did not seem to help any but i can here a little static in speaker if i hold it up to my ear any other suggestions thanks

Rick · Post by **Rick** » Tuesday 8th Apr 2008, 0:16

Check all the caps around the audio chip, like C175, 176,179 and 180. Let us know on how you get on.

scott3696 · Post by **scott3696** » Wednesday 9th Apr 2008, 3:41

hey rick i'm still green at this what do i need to check voltage or ohms or what. thanks

scott3696 · Post by **scott3696** » Wednesday 9th Apr 2008, 14:56

scott3696 wrote:hey rick i'm still green at this what do i need to check voltage or ohms or what. thanks

and also do i need to solder r87 and d65 back in. thanks again

Rick · Post by **Rick** » Friday 11th Apr 2008, 10:09

Yes solder R87 and D65 back in place, as you are green, it would just be easy to replace the caps and hope for the best or take the radio to some one who can fix it for you. sorry I could not be more helpful, but I am very busy.

scott3696 · Post by **scott3696** » Saturday 12th Apr 2008, 4:43

sorry to bother thanks anyway

Rick · Post by **Rick** » Saturday 12th Apr 2008, 23:59

That ok. Let hope that so one else is more helpful than I was.

scott3696 · Post by **scott3696** » Monday 14th Apr 2008, 5:24

replaced caps C175,176,179,180 and no difference still no sound

scott3696 · Post by **scott3696** » Thursday 25th Jun 2009, 13:05

finally got this 148 fixed replaced caps again around audio chip and came to life thanks guys

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cobra 148gtl no sound

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Re: cobra 148gtl no sound