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Motorola gm300 the set transmits ok, but recieves soft

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  • koekie Dec 08, 2007

    Small problems amazes small minds, I've tried 5 gm300 faces on this 1 set and the problem is with the set and not the volume adjustment!!!!



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You mean a low volume?
if so try to set it higher (can't be difficult)

Posted on Dec 08, 2007

  • 1 more comment 
  • Dick van Zalinge Dec 08, 2007

    i've red (if the volume control is a knob) that it may help to push it inwards before turning,
    this because sometimes the knob has been pushed in before

    it's a standard problem that sometimes happens during shipment

  • Dick van Zalinge Dec 08, 2007

    if that doesn't work, here's a tip for replacement of the cknob (if nesicary)

  • Dick van Zalinge Dec 08, 2007

    i think it's better to get it checked out by a pro (like the guy you bought it from)

    i'm sorry, and good luck with your search



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If you are referring to the receive audio, possibly the reason it is soft/weak are:
1. defective internal speaker - try using an external speaker;
2. volume control - try rotating back & forth till you get satisfactory level. In some cases, you may need to clean the inside of the volume control with an electronic contact cleaner. At worst is that it has to be replaced;
3. defective amplifier - between the volume control and the speaker is the audio amplifier. This is a single op-amp IC U501 (TDA1519A); and/or
4. muting - which is a bit complicated. This is triggered either by the squelch or by the CTCSS tone decoder. You may have partial/false muting. You need to check Q501 (MMBT3904) and its associated circuitry.

Other than #1, most fix would require opening the unit and familiarity with electronic circuitry & components, use of a DVM and soldering iron. Perhaps your best bet would be to seek the services of a qualified communication technician.

Hope that this be of some help/idea. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.

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