No TX trying to fix a Motorola CP200 it can't TX but has 4watts. I also tested the RX and Mic Jack both tested good. Can someone out there help me out?????

You may have one of three problems: Your audio accessory jack is bad, you are using the wrong mic for the radio, or your mic is bad. Try the mic on a known good BPR40 and if it test good, if so, your BPR40 with the problem needs a new audio accessory jack. (Repair is available for this model.) We have found the BPR40 will only work properly with the remote speaker mic designed for it, despite some other Motorola mics appearing to fit the jack. Construction grade mic PMMN4013 is a good option, as is the lightweight PMMN4077.

Rx is an abbreviation for receive. (Tx is transmit) There are a variety of reasons a radio will be "stuck" in Rx:
1) Another radio in the group is stuck in transmit and you cannot reply if your radio is receiving the other radios transmission.
2) Your radio is programmed for Rx only.
3) Your radio has a Tx problem such as a bad mic, or something covering the mic opening.
4) Your battery is low or bad. It takes more energy to Tx than to Rx.

Best regards.

simple,just chech the input resistance and out put...they should have even small resistance always example .5ohms .3 ohms it counts...

Change the Mic, check the Power Supply, check the antenna connection because your TX side have a problem.

to get this fixed is going to cost you more than the radio is worth. Your decision.

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.

5 pin to 4 pin as follows, from the Cobra website.
1.->2 Audio
2.->1 Shield and common
3.->4 RX
4.->also goes to pin 1
5.->3 TX

Does the roger beep come with instructions? It can vary between beep boards.

Typically it gets installed inline with the mic jack.

There is a wire or pin on the board where the tx wire, and the rx wires go.These wires get disconnected from the mic jack, then a wire goes to the tx pin. Then there is an audio wire that gets connected to the audio wire of the mic jack. Then the black wire to ground, and the red wire to switched 12v right off the power switch.

Here is a schematic of the board connected to the mic jack so you know what pin is what.

Again, I would need to know what roger beep board you would like to install.

I was suprised to see quite a few people are tweaking their sound settings and various other things -
thanks very much for the insightful help offered for my queries.

It might be an abuse of space, but If anyone else happens to needs/wants the defaults values SHG D500 Samsung Test Mode they are:.

Code: *#8999*8378# ( * means press star)

Normal
MIC gain - 0
Tx PGA - 70
Side PGA - 0
Ear gain - 3
HFR gain - 9
Rx PGA - 128
Rx vol - Lv 1 - 10
Rx vol - Lv 2 - 28
Rx vol - Lv 3 - 40
Rx vol - Lv 4 - 50
Rx vol - Lv 5 - 96
Rx comp - Lv 1 - 11
Rx comp - Lv 2 - 11
Rx comp - Lv3 - 11
Rx comp - Lv 4 - 29
Rx comp - Lv 5 - 30
Key vol - Lv1 - 64
Key vol - Lv2 - 64
Key vol - Lv3 - 64
Key vol - Lv4 - 64
Key vol - Lv5 - 64

Headset
MIC gain - 0
Tx PGA - 64
Side PGA - 0
Ear gain - 13
HFR gain - 3
Rx PGA - 128
Rx vol - Lv 1 - 10
Rx vol - Lv 2 - 20
Rx vol - Lv 3 - 42
Rx vol - Lv 4 - 76
Rx vol - Lv 5 - 146
Rx comp - Lv 1 - 11
Rx comp - Lv 2 - 11
Rx comp - Lv 3 - 11
Rx comp - Lv 4 - 30
Rx comp - Lv 5 - 28
Key vol - Lv1 - 10
Key vol - Lv2 - 20
Key vol - Lv3 - 42
Key vol - Lv4 - 76
Key vol - Lv5 146

Loud SPK SUP
MIC gain - 0
Tx PGA - 160
Side PGA - 0
Ear gain - 12
HFR gain - 5
Rx PGA - 120
Rx vol - Lv 1 - 16
Rx vol - Lv 2 - 27
Rx vol - Lv 3 - 45
Rx vol - Lv 4 - 76
Rx vol - Lv 5 - 128
Key vol - Lv1 - 1
Key vol - Lv2 - 2
Key vol - Lv3 - 3
Key vol - Lv4 - 4
Key vol - Lv5 - 4

Loud SPK SDN
MIC gain - 0
Tx PGA - 160
Side PGA - 0
Ear gain - 12
HFR gain - 5
Rx PGA - 120
Rx vol - Lv 1 - 16
Rx vol - Lv 2 - 27
Rx vol - Lv 3 - 45
Rx vol - Lv 4 - 76
Rx vol - Lv 5 - 128
Key vol - Lv1 - 1
Key vol - Lv2 - 2
Key vol - Lv3 - 3
Key vol - Lv4 - 4
Key vol - Lv5 - 4

Loud SPK EXT
MIC gain - 1
Tx PGA - 226
Side PGA - 0
Ear gain - 12
HFR gain - 5
Rx PGA - 92
Rx vol - Lv 1 - 16
Rx vol - Lv 2 - 27
Rx vol - Lv 3 - 45
Rx vol - Lv 4 - 76
Rx vol - Lv 5 - 128
Key vol - Lv1 - 5
Key vol - Lv2 - 2
Key vol - Lv3 - 3
Key vol - Lv4 - 4
Key vol - Lv5 - 4

Loud SPK Out Only
Tx PGA - 160
Side PGA - 0
Ear gain - 12
HFR gain - 5
Rx PGA - 120
Rx vol - Lv 1 - 10
Rx vol - Lv 2 - 28
Rx vol - Lv 3 - 40
Rx vol - Lv 4 - 50
Rx vol - Lv 5 - 96
Key vol - Lv1 - 1
Key vol - Lv2 - 2
Key vol - Lv3 - 3
Key vol - Lv4 - 4
Key vol - Lv5 - 4

Yamaha AMP vol.
31

Yamaha MEL vol.
Normal
Lv 1 - 6
Lv 2 - 12
Lv 3 - 18
Lv 4 - 24
Lv 5 - 31
Melody key
Lv 1 - 2
Lv 2 - 4
Lv 3 - 11
Lv 4 - 18
Lv 5 - 25
Power on/off
Lv 1 - 1
Lv 2 - 10
Lv 3 - 14
Lv 4 - 18
Lv 5 - 22

ISS Normal
Ear gain - 12
HFR gain - 3
Rx vol - Lv 1 - 121
Rx vol - Lv 2 - 186
Rx vol - Lv 3 - 268
Rx vol - Lv 4 - 376
Rx vol - Lv 5 - 564
Rx vol - Lv 6 - 802
Rx vol - Lv 7 - 980
Rx vol - Lv 8 - 1560
Rx vol - Lv 9 - 2167
Rx vol - Lv 10 - 2863

ISS Headset
Ear gain - 10
HFR gain - 3
Rx vol - Lv 1 - 164
Rx vol - Lv 2 - 328
Rx vol - Lv 3 - 492
Rx vol - Lv 4 - 656
Rx vol - Lv 5 - 820
Rx vol - Lv 6 - 984
Rx vol - Lv 7 - 1148
Rx vol - Lv 8 - 1312
Rx vol - Lv 9 - 1476
Rx vol - Lv 10 - 1640

Bluetooth
Tx PGA - 255
Rx PGA - 12
Side PGA - 0

I have one for a Cobra CA50 may work
pin-1 shield or ground
pin-2 audio lead
pin-3 tx
pin-4 rx
there are one more
pin-1ground
pin-2 audio
pin-3-rx
pin-4 -tx