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Re: Motorola T5420 Transmit Problem
Here are some troubleshooting thoughts:
1. Is your battery indicator showing at least 2-3 bars? (Battery Note: Your rechargeable batteries may fail due to setting without use for a long period of time. They need replaced every 12-14 months usually. A good tip is to charge them once a month to keep the chemical in the battery active.)
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.
3. With your radios set to interference code zero, place your radios one at a time in scan mode, while you transmit/talk on one individual radio. See if any of the radios receive. Do this with each radio individually to see if you are transmitting at all. NOTE: This test will determine if you have any ability to transmit. If you do not receive any sound on the 3 radios setting in scan mode, the individual radio you are testing will not transmit.
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Check your CODE (aka private line, PL, quiet call, interference eliminator) setting. You may have the two radios set differently. One radio is possible set to open squelch (no CODE) and the other one has a CODE selected. This is an extra filter of sorts which blocks out other users who are on your frequency, so you don't have to hear them. Only radios set identically can communicate.
Two other possibilities include bad or poorly charged battery or a problem with one radio.
Here are a few things to try:
1) Trade battery packs with a known good radio and see if the problem is solved. If so, you have a bad or poorly charged battery.
2) Take your radio back to a very basic programming with all special features turned off (or set to zero), and the interference eliminator code turned off (zero). See if the units will work together. If not, one radio is bad or defective. If less than a year old, you should use the toll-free number for Motorola/Giant Intl provided in your user guide to contatct them and likely get a replacement radio.
Constant static can be a sign of a bad or low battery. If the battery is known to be good, try the radios outside the factory setting to see if the problem persists. If you have no problem when you are away from the machinery, you may need to set your interference eliminator code to a number other than zero. This will turn your eliminator ON, which will block out the radio frequency interference caused by the machines.
If the problem persists outside of the factory, then you should try replacing the batteries. OR possibly just cleaning the battery contacts with a pencil eraser.
The method you are using for resetting the radio will take the radio back to the factory default settings. It will not solve the problems listed above. It will only reset the frequency and code back to the original settings.
Can you tell if the radio is actually transmitting? Is there any sound on the transmitting radio or a light inditcating that it is indeed transmitting? If not maybe the PTT button is malfunctioning. Try to use a microphone plugged into the accessory jack and see if it works. Another option is if you have a radio scanner, search the frequency range while transmitting and see if you pick up that open carrier.
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.
Make sure that both radios are using the same Interference Eliminator Code. The situation you describe sounds like one radio has a Interfernce Eliminator Code activated and the other radio does not.
To access the Interfence Eliminator Code setting on this radio press and hold the MENU button until the code starts to flash, then use the + or - keys to adjust the setting and press the PTT to save it.