Question about Motorola Talkabout T4500 (7 Channels) 2-Way Radio

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Hi One of my Motorola T4502 446Mhz Radios is unable to transmit anymore. It still receives though. Any suggestions on a repair would be gratefully received. Regards John Morrison west_highlander2003@yahoo.co.uk

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6 Suggested Answers

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Posted on Jan 02, 2017

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Benimur
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SOURCE: Cannot Receive a signal on either of my radios.

Hi again,

It would seem that you posted twice. Here is the link to your other post with my response.

Cheers.

Posted on Nov 21, 2007

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eradiostore
  • 1654 Answers

SOURCE: won't receive or transmit

Here is a link to the user manual: http://www.motorola.com/mdirect/manuals/T56XX_57XX_User%20_Manual_E.pdf

Posted on Aug 21, 2008

eradiostore
  • 1654 Answers

SOURCE: T5420 unable to transmit or receive. Please help!

Here is a link to the T5000-T5500 user manual. 'http://www.motorola.com/mdirect/manuals/T50-T55_UserGuide.pdf'

From what you have stated, I can discern the radios will power up. You might try setting your interference eliminators to zero (off) to see if you are able to transmit at all.

You do not mention if you are using AA batteries or rechargeables. Either way a fresh set of charged batteries would be best for a test. It is clear you were getting power. However, it does take more energy to transmit than to receive. If your batteries are low or bad, pressing the PTT could us all the energy the radio has, and yet not transmit to the other units.

You might also check you VOX settings if any and be certain they are turned off.

It is not likely 4 radios would fail all at the same time. So it is probably a programming problem. Hope the user manual helps you find the solution.

Posted on Aug 24, 2008

eradiostore
  • 1654 Answers

SOURCE: T5420 unable to transmit or receive. Please help!

Here is a link to the user manual: http://www.giantintl.com/ContentManage/manuals/Moto/T5320_T5410_T5420_User_Manual_E.pdf

This unit does not have a reset button. While troubleshooting you might check the batteries. Be certain they are in correctly and the contacts are free of corrosion. You can use a pencil eraser to clean the contacts.

Walk through all the programming instructions in the manual, double checking both the frequency and interference eliminator codes. A quick setting back to zero on the code would alleviate any problem with that section of the radio.

As far as your "paging" this operates on the same frequency and code as the rest of the radio. If the radios are not working correctly in this relm, the paging will not work either.

Posted on Apr 24, 2009

eradiostore
  • 1654 Answers

SOURCE: Can Receive but not Transmit

1) Double check your interference code eliminator and the Qt filter. Make certain they are all set identical.

2) If you are still having trouble, shut off the Qt filter.

3) Then if you still have trouble shut off the code. (Off is sometimes "zero" or "n" for no.)

4) If the above steps do not help you have either a defective radio, or a bad battery. Switch the batteries out of the working units to the non-working and see if the problem switches to the other units. If so, replace the battery packs. (Note: it takes more battery power to transmit, so the problem would first show up in the transmit area.)

Best regards.

Posted on Nov 10, 2009

Testimonial: "Response from this site is almost immediate! Will try it out & respond asap ... although I must say I dont understand those techie terms:{ TQ anyway!"

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Best regards.

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What you are describing indicated the "code" is not set the same on both radios. Check your frequency, interference code eliminator and Qt filter (if any). All the settings must be identical between the two radios. If you are still having issues, set your code and Qt filter (if any) to zero (off) and then try it. Lastly, check your batteries. Bad or poorly charged batteries can cause transmit issues, as it takes more power to transmit than to receive.

Here's a link to the manual: http://www.giantintl.com/RadioPDFs/Outdated%20Manuals/T4500_User_Manual_E.pdf

Best regards.

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1 Answer

T5420 unable to transmit or receive. Please help!


Here is a link to the user manual: http://www.giantintl.com/ContentManage/manuals/Moto/T5320_T5410_T5420_User_Manual_E.pdf

This unit does not have a reset button. While troubleshooting you might check the batteries. Be certain they are in correctly and the contacts are free of corrosion. You can use a pencil eraser to clean the contacts.

Walk through all the programming instructions in the manual, double checking both the frequency and interference eliminator codes. A quick setting back to zero on the code would alleviate any problem with that section of the radio.

As far as your "paging" this operates on the same frequency and code as the rest of the radio. If the radios are not working correctly in this relm, the paging will not work either.

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2. Check to see your Qt noise filter is shut off. Refer to page 22 of the owners manual. It is possible you have some radios set to Y and others to N. To assure good communications you should set all of them to N.

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1 Answer

T5420 unable to transmit or receive. Please help!


Here is a link to the T5000-T5500 user manual. 'http://www.motorola.com/mdirect/manuals/T50-T55_UserGuide.pdf'

From what you have stated, I can discern the radios will power up. You might try setting your interference eliminators to zero (off) to see if you are able to transmit at all.

You do not mention if you are using AA batteries or rechargeables. Either way a fresh set of charged batteries would be best for a test. It is clear you were getting power. However, it does take more energy to transmit than to receive. If your batteries are low or bad, pressing the PTT could us all the energy the radio has, and yet not transmit to the other units.

You might also check you VOX settings if any and be certain they are turned off.

It is not likely 4 radios would fail all at the same time. So it is probably a programming problem. Hope the user manual helps you find the solution.

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