Tip & How-To about Panasonic KX TGA400B Cordless Expansion Handset

Choppy Transmit - People cannot understand your or complain you break up....

Choppy Transmit is a common problem in this model phone. It is important to remember that you cannot hear the problem in the phone that has the problem as it is only in the transmitted signal. The problem is usually intermittent and effected by heat and humidity changes as well as vibration. If you experience the problem it will not permanently go away on it's own and will only get worse. As Choppy Transmit progresses, not only will your callers be extremely annoyed, bit it will start to effect the operation of the phone. The base unit will loose communication with the handset and may report it as out of range. You should also be aware that the base unit can also have the same problem. When your base unit has Choppy Transmit it will effect the sound quality in all, or most, of your cordless handsets. Once again... you cannot hear the problem in the phone that has the problem. This will often confuse people into repairing or replacing the wrong part. If you have noticed a problem with Choppy Transmit you will need to have the phone serviced. It will never just go away and you can never tell when it has returned.

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New hand held Midland CB Model #75-785 that will not transmit


Try asking any onrt CB'ers if they can hear you at all.

Could be 2 things -

#1 - you are really too close.

#2 - you've blown the output stage of your rig by keying the mic without an aerial fitted.
- This is very common, and most repair centres are used to dealing with this.
If you are up to electronic repair, it's possible to DIY repair.
Could also be an antenna mismatch or fault.

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This sounds like a radio transmiting problem. This problem shows up first as "choppy transmit" where custimers complane of you sounding choppy or "under water". Google "KX-TGA400B choppy transmit" to find out more.

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Characters and numbers are choppy too Thank you

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You should try installing a new battery and ensure it fully charges overnight. I just helped a customer last week with the exact same problem, and it was her battery. If the battery does not put out enough power to run the radio module then it will give the same symptoms as a bad radio module (even though the battery shows a full charge and works okay on another handset). If that does not do it, I can only recommend sending it to a repair facility (use google to search for cordless repair facility). If you try to fix the module yourself and ruin it, they cost over $60 each for a new radio module for that model and just looking at the module I don't have to tell you how hard it is to remove the entire module without tearing up the main board and replacing it. In this case you must know your limits. ie. I rotate my cars tires, change plugs, etc.. but I don't tear into the transmission when its slipping, I leave that for the guys that do it everyday. Good Luck.

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Mine cannot transmit either, i'm gonna pull it up and see, but you just have to put it on the base for a few minutes to register.

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