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Motorola Radius No PTT or Low PTT

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kd8omt

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I have looked around on the net for anyone who might have this problem and cant really find anything. I have a 32 ch UHF Moto Radius. When you key up the TX light is dim or doesnt come on at all. I test the mic on another radio and works great. So my question is, is there anything i can do to determine whats wrong on mine, keeping in mind i am not a radio expert by anymeans. If i can see pic or video and read i can usually do whatever needs done. lol. I have a old low band radius ( 39 mhz i think) i have for a parts radio. is there anything i can just switch out and make my 32ch work again.

Thanks

Matt
 

DPapay

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Jul 5, 2007
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Morris County, N.J.
Do you have a Moto dealer near you? You could bring the mobile with you, and ask them if you could try the mic on that radio, prior to actual purchase.
 

llu727

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Nov 26, 2003
Messages
56
Location
New Jersey
If you have another maxtrac, simply take and swap the front panel. It doesnt have to be the same type to troubleshoot your problem. 2 Torx screws in the front and 2 plugs inside. If that works, then the problem is in the control head. I am assuming the the radio does transmit OK, just that the PTT light isnt coming on. If the radio doesnt transmit, you most likely have a logic board problem.
Good luck
 

petnrdx

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Feb 5, 2004
Messages
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Location
Sparks, NV
Did the radio in question ever work for you?
If it is a radio you just got, then the VCO steering line voltage may be wrong. (Meaning it was tuned for a different part of the band.)
If if did work for you, could be poor contact of the pins going between the logic board and the RF board.
OFTEN completely dismantling the Radius/Maxtrac/GM300 model radios, and cleaning the pins and other connections will fix it.
The above suggestion of substituting a different front panel is a good idea also, probably a good place to start.
 

kd8omt

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yes the radio did work, it just went all of a sudden, i can read and write to the radio with no problems, tried a different mic and still no tx.
 
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