Galaxy DX 959 NO AUDIO

[topdogli22]

Need Help!

Just picked up a 959 in a lot of CB stuff. Radio powers on and TX's , but no Audio at all. No static noise.., needle not moving, no PA. Almost hearing something from very loud locals but I would need a stethoscope on the speaker..lol Started changing some caps but some may have already been changed. Has writing under the lid that the adio chip was changed a few years back by a shop. They may have done a recap.

Any suggestions????

 

[Robb]

Usually, it is the older radios that benefit with replacing the caps.
Sure that the RF Gain is all of the way up?
Just had to say that.

Wouldn't surprise me at all if the audio chip has failed again.

If not, then a shop would be the best place to take it; if it is going going to need thrashing to find the failed parts in the receive.

 

[topdogli22]

The S-meter does not show any movement while another radio is showing 9+ on ch6.
Before I order an audio IC id like to make sure it is receiving well. Bad diode maybe? Anyone have any experience with this model and which diodes could be the culprit???

 

[hammer0630]

I also have a 959DX that has no sound coming out of any speaker but it does transmit with good modulation and I can see the meter receive and have tested the receive but no sound coming out anywhere.

 

[Lil'Yeshua]

I plugged my external speaker plug into my 959 a little too hard and at the wrong angle some time back. It resulted in no receive audio unless I had a external speaker plugged in. I remedied the problem by bending the radio's external speaker jack metal contacts more or less back into the proper alignment. I got sound again. I'll not do that anymore.

 

[topdogli22]

I have tried both the internal and external speaker connections and the PA jack.....Nothing!

 

[mb91w126]

Seems to be a common theme this week. referb dx949 has talkback audio but none on am/ssb. Haven't checked xmit yet.

 

[Lil'Yeshua]

Mine's fine!

 

[sonoma]

I would be leaning towards the audio chip since you do not even have PA

 

[topdogli22]

Found a bad cap at either C175 or C179. Bottem end of cap spilled its gutz. Replaced and still no audio......What else would be screwing with the receive showing no needle movement...



.Anybody have any TA7222P IC audio chips laying around????????

 

[slprydk]

Check and see if you have 8 volts at C170, that supply runs all sorts of things in the radio.

Jim

 

[sonoma]

will see if the voltage chart will load here. ,you can check the voltages to see what is missing

 

[topdogli22]

Thanks for the response.. I will check C170 and will begin to check voltages from the list...thanks guys!

 

[topdogli22]

Check and see if you have 8 volts at C170, that supply runs all sorts of things in the radio.

Jim

C170 ==== +8.88V

 

[giboni]

Happy thanks giving !

An old thread. Well a Voltage chart. Ok.
Changed out AF to NTE 153, changed out audio ic, upgraded voltage regulator.

Tx with modulation.

No RX, No PA & talk back audio on internal or external speaker.

Anybody have a clue?

Thanks in advance.

73s John