Motorolagm300

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audio problem

I have two Motorola gm 300 : transmission is o.k. but the receiver's sound is very faint from the internal speaker . I am baffled because the problem is with both units. The rear connections are as required. I have tried different connection swapping without results…Help/suggestions, please? Thank you!
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Were these recently programed?

The receiver's are usually pretty good on these.

Have you done any other tests?
 

Last edit: by CountryBoyUSA

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CountryBoyUSA said

Were these recently programed?

The receiver's are usually pretty good on these.

Have you done any other tests?
 

HI and thank you for you prompt reply! I purchased the units via Ebay and I understand they were working in taxi cabs. I have tested the transmitting side and everything is working to specs, so is the receiving circuit with the exception of the sound volume… no programming has been done and the units are working withe the original specs.It almost seems that the squelch is not opening. but, there again I should not be able to hear anything at all…mistery?
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