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Synth not working (Troubleshooting Help)

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This topic contains 3 replies, has 3 voices, and was last updated by  brach 4 months, 3 weeks ago.

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  • #1993 Reply


    I finished soldering the DIY kit of the Macchiato Synth, but get no sound. I have read the quickstart guide, and tried tweaking the knobs even randomly to no avail. The power LED comes on properly, but that’s it for output. I have checked my connections and parts, and they all seem to be the right parts in the right spots with properly soldered connections.

    Are there any known issues to watch out for, parts I should try replacing, or software glitches?

    My first guess is maybe when I soldered it too much heat got to the 2 IC’s. If nothing else works, I guess I’ll try replacing them with IC sockets and new IC’s.

    #2014 Reply


    Holy Cannoli Jeremy! We’ve had some trouble with our Forum Notifications routine, and your post escaped our attention. Pray tell, how’s that Macchiato of yours? Still silent? What’s the serial number? Do I understand you get no sound from either the onboard speaker or through the headphone jack? Among the possible explanations are 1) a damaged component, as you noted; 2) an undetected broken solder joint along the critical signal path, probably somewhere from the volume pot to the point where the signal splits between the speaker and the jack. I’ll have Brach, the Macchiato’s designer, chime in tomorrow. Sorry for the delay.


    #2051 Reply


    Same here. Just finished building the DIY kit. The LED turns on, but no sound is produced, either by the speaker or by the headphones. Any suggestion?


    #2057 Reply


    Sorry for the late response.
    In reference the “quick start guide”…First of all make sure the depth, attack, and release knobs is all the way to the left. Plug in headphones or computer speakers and then test it again. If you still can’t hear any sound, then double check your solder joints in the audio section of the circuit board…which is all the components connected to the LM396 amplifier chip. Make sure everything is connected properly and nothing is connected that shouldn’t be.
    If you still can’t figure it out, let me know and we’ll start looking at the voltages around the audio section to see if everything is functioning properly.
    Good luck.

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