Connex 3300Hp No RX Audio, talkback or PA

[Chris Lawrence]

Radio had very low rx audio and talkback. Now it’s completely gone. Tested the Pa and it has no audio either.

Tx is good. Rx is good, according to meter.

Please let me know if there is anything other info I can provide to help. Ranger 3600-15C board. Audio chip is the 5 pin 2003. Voltages are good on all legs. [6.5/.9/13.8/0/1.5]

Thank you

 

[Chris Lawrence]

Bump?

 

[sp5it]

On 4th leg should be 1/2 PS voltage. Measure between 3 and 4 and come back with result.

 

[Chris Lawrence]

On 4th leg should be 1/2 PS voltage. Measure between 3 and 4 and come back with result.

Not being in front of the radio right now, I’m going to go with the readings I listed originally.
Pin 4 6.5v
Pin 3 13.8v

 

[Handy Andy]

Can mean several things.

Low RX Volume yet say RX is good - how did you check this?

I would look into checking and if possible - reseating connectors in and around the front panel to main board.

Low volume usually indicated a weak connection - not always but it may be a good idea to start reheating soldering joints at those headers and follow each trace back and reheat any cold/cloudy soldering joint and re-test the radio as you complete a section, of say 5, soler pads reheated.

This helps us - so you can develop a path of repair to say, ok, this section was doing this - now this happens - so we can then follow along and help you.

 

[James Carman]

Low volume can also be a trouble in the mic.

 

[James Carman]

Low volume can also be a trouble in the mic.

 

[James Carman]

In some cases, the problem is in the mic.

 

[Chris Lawrence]

I feel kind of dumb about this, but not entirely.

Both the internal and external speakers were connected when I was replacing the am regulator, driver, and finals. At some point, I think I shorted power to one of the speaker wires. It turns out, I took out my external speaker as well as the internal speaker. The odds that I had two speakers that were bad didn’t cross my mind.

Apparently, the radio was fine; the speakers were not. Had me scratching my head.

 

[TM86]

File that one under "Poop happens." The important thing is you found and fixed the problem.

 

[AudioShockwav]

. At some point, I think I shorted power to one of the speaker wires.

It happens. Fate spared you that it was just the speakers.
Welcome to the Neighborhood.

73
Jeff

 

[Dmans]

Had the same thing happen to me 10 or so years ago on a guitar amplifier.
Gave up and gave the amp to a friend, he replaced the speakers in it and still uses it today.

Doo-doo do happen!!

73
David

 

[Handy Andy]

Apparently, the radio was fine; the speakers were not. Had me scratching my head.

You're not the only one this happens to.

Sometimes The scratching of the noggin sometimes has a relaxing - therapeutic effect - after banging your head against a wall in the other moments...