Motorola tlkr t3 both units power up ok they are

Amytel and Motorola may not use the same numbers for their frequencies. You need the actual manual for both models and you cross check the actual numbers. Do this for the Codes or Tone section also. This happened a lot in early days of consumer radios and still happens with chinese imports. Best of luck.

read your manual about PL-codes

Check your Private Line (aka interference eliminator code, tone code, PL, quiet call). It sounds like you have one radio set with a PL setting and the other one is open squelch (no private line). All settings for frequency and PL code need to be the same between the two radios.

We don't have a manual for the T3, but I am attaching one for the T5, which may be similar. http://www.motorola.com/web/Business/Products/Two-Way%20Radios%20-%20Unlicensed/_Documents/TLKR-T%20series/Static%20Files/T5%20Manual%20EU.pdf

Best regards.

For this problem contact your mobile service provider.......

wa de ptt toets?

One of my tlkr-t3 walkie talkie's will not recieve.

They worked fine the first time we tried them out. Then they were put away for several weeks, and when they've been switched on, one now doesn't send. I checked this by the other putting in scan mode but it doesn't stop scanning at the channel it is assumed to send with. I tried all the channels for sending but neither one is detected. The other way around, so the first one in scanning mode, the 2nd in send mode, works fine (the scanning stops at the channel of the sending one, as expected).
So my conclusion is, that one doesn't send.
I interchanged the (fresh) batteries, but this doesn;t change.
So what could be the problem?

Here is a link to the user guide: http://www.giantintl.com/RadioPDFs/Outdated%20Manuals/T56XX_57XX_User_Manual_E.pdf

Best regards.

The "MONITOR" is probably stuck on. You can go to
http://www.mods.dk/manual.php?brand=motorola and login (its free) and download the manual and look for how to turn off the "MONITOR" function.

svp dite moi comment les refaire marcher car il y en a un qui recoit tout et l'autre rien du tou svp aider moi

No, they have no frequencies in common. The TLKR-T3 uses the PMR446 frequencies common in Europe. The T5720 uses FRS freqeuncies common in the USA.