GM300 (M10) Audio Problem

Rayjk110 · Post by **Rayjk110** » Tue Apr 03, 2007 6:21 pm

Just got a UHF Moto M10 (1 ch version of GM300) that is exhibiting a rather annoying audio problem.

The more I turn up the volume, it starts to sound like the speaker is getting feedback? I guess when I'm receiving a transmission, if I start to turn it about half past, the louder I crank it, the more of a "feedback" noise I get (like when you key up 2 portables next to eachother).

Any ideas/fixes?

jackhackett · Post by **jackhackett** » Tue Apr 03, 2007 6:29 pm

You need to look at the feedthrough connector, pull out the logic board to get to it, if the connector is marked 64-80535B01, it is bad. You need to replace it with a 2804637J01.

Will · Post by **Will** » Tue Apr 03, 2007 10:06 pm

Radio is microphonic. Just tapping on the radio while even at low volume will do the "feedback".

Like Jack mentioned and the RX VCO coils are known to also be microphonic. Even the Transmit VCO coils are known to be microphonic.