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Check the SWR. also those style radios have small vertical boards.. in them and they come loose from the main board and wont TX or RX when that happens..
one wire is ground,one wire is tx one wire is rx,so now all you have to do is find which wire goes where. do you have a multi meter? put one end into the antenna plug on the radio now put you meter on sound for an ohms reading and touch the pins .If the pin makes a loud clear sound thats your ground now the rest is trial and error. When you finally get it connected write down the wiring so you can have it at a future date.
That's usually a defective amc stage that produces RX audio and TX modulation. It's an integrated circuit that will require a tech fixing it. You will have a transmitted carrier with no modulation, and no sound in your speaker. However, make sure you have a good mike plugged in first, and substitute a known good mike to verify it's not the mike. With the WX band working, the above may not apply.
See if you have a carrier...signal going out, but no modulation. Get your Tech to check the mike wiring/circuitry inside the radio, also.
looks like you may have taken out the audio amp in the radio it it usually not hard to replace if you have some soldering skills. I bet you don't have any TX audio either. These little radios do a double duty with the audio ic. They are used to rx and tx audio so it does both duties when the radio is on. These are great radios to use and work on if you are willing to try and crack the hood.
Ya know I have that same radio with the same chirp. I have asked many to tell me if they hear the chirp on the air and no one has heard it but me. I know what it is but i wont fix it due to the fact it is the only radio that does that to me and i think its kinda cute for it to do it. Now to let you in on the secret is that for the radio to go from rx to tx is handled by transistors plus the computer has to give final say so to tx. So the chirp is developed by the switching and computer turn around times to allow you to talk. I hope this helps.
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