My superstar 3900 transmits on one channel and receives on one ch

Need more info, is the wires soldered on, has one broken, on board do you get a reading an not on meter? Could be meter or poor solder or broken wires. Because you dont get readings at all, tells me its more likely the meter or connections

This might help as I don't have a color code for the mic. Radio pin code; 1 - Audio -2 - Shield - 3 - Receive - 4 - Sw. Wire -
5 - Transmit

MIKE WIRING GUIDE
Found this by Google searching;
5 Pin Mic Plug Model

Pin #1 Audio Output / White
Pin #2 Shield
Pin #3 Receive / Black
Pin #4 Common / Yellow
Pin #5 Transmit / Red

is it a total no TX. or just not getting out very far.?
could have a broken mic wire. or the CB / PA switch may be in a wierd spot try moving it.. are you getting the Correct RX frequency on the channels.. ie are you getting channel 20 on acutal ch 20. and if you switch to ch. 6 are you getting ch 6? if you could explain more..

sorry disregaurd the wire colors.. on last post
1. Ground Shield
2. Audio
3. Transmit
4. Receive
5. CH. Up
6. CH. Down
wires can be any color. just matters what pin and pole of the switch they are one.

did you found the problem,mine has the sam problems...reception not very loud on ssb,am fm very good...

Obviously your channel display must be working. I would assume the radio has sustain some harsh trauma to the channel selector itself possibly a drop.
Remove the speaker side cover looking down on the channel selector and its pcb board check connection and between the mechanical switch and pcb.
This may be as simple as a cold solder joint the problem is finding it.
http://www.cbtricks.com/radios/superstar/3900/graphics/ss3900_sch.gif the schematic is for the 3900 which i believe are similar units.

Hello,
You want to be able to transmit to the Coast Station on this frequency I assume. The Coast Guard monitors channel 16 at all times. This would be the primary channel in the United States. Your radio is VHF Marine Radio and has a built in frequency range of 156.050 MHz to 163.275 MHz. There is no need for a modification. This is a duplex frequency. What that means is you will transmit on one frequency and receive on another, while on channel 20. You will not need to transmit on 161.600. Turn your radio to channel 20. When you transmit, you will transmit on 157.000. And when the Port responds to you your radio will automatically receive their signal on 161.600. So if you are trying to figure out how to communicate with the port authorities then for that frequency turn your radio to channel 20 and you will be able to communicate with them.

Regards, Tony

1) Shield 2) White 3) Brown 4) Green

1) Shield/ Ground
2) Audio
3) Transmit
4) Receive

here is the info you asked for the following is the correct wiring.


Mic Wiring Info
Stock Mic Wiring
1. Ground Shield
2. Audio Yellow
3. Transmit Red
4. Receive Black
5. CH. Up White
6. CH. Down Blue
Turner 4-Wire MIC. Wiring
1. Ground Shield
2. Audio White
3. Transmit Black
4. Receive N/C
5. CH. UP N/C
6. CH. Down N/C

Turner 6-Wire MIC. Wiring
1. Ground Shield & Red
2. Audio White
3. Transmit Blue
4. Receive N/C
5. CH. UP N/C
6. CH. Down N/C

Astatic 4-Wire MIC. Wiring
1. Ground Shield
2. Audio White
3. Transmit Red
4. Receive N/C
5. CH. UP N/C
6. CH. Down N/C

Astatic 6-Wire MIC. Wiring
1. Ground Shield & Blue
2. Audio White
3. Transmit Red
4. Receive N/C
5. CH. UP N/C
6. CH. Down N/C

Yes, the wiring is different. Reverse the wires on pins 1 & 2, then reverse the wires on pins 3 & 4.

The wiring for you radio's mike is:

1- Audio
2-Ground (Shield)
3-Receive
4-Transmit

Depending on the vintage of your mike, the colors Uniden uses for these functions are white or yellow for audio, red is transmit & black is receive.