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Nonsense Focusrite Liquid 4 pre

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  • Davebassman
    replied
    Yes,

    yesterday I sent an email. Waiting..

    Leave a comment:


  • glebert
    replied
    Have you tried contacting Focusrite? If they won't give schematics (which is a real possiblity) they might be willing to at least confirm which regulators should be there and what the output voltage of the LM317 should be.

    Leave a comment:


  • Davebassman
    replied
    maybe, but for investigate I need something more. Some photos of other units, something...

    Leave a comment:


  • glebert
    replied
    I guess to me that rework looks pretty deliberate (at least the diodes in the four preamp channels), so I would not discount it as junk without more investigation. Maybe just try reflowing the solder joints on bottom side components. Maybe you will get lucky.

    Leave a comment:


  • Davebassman
    started a topic Nonsense Focusrite Liquid 4 pre

    Nonsense Focusrite Liquid 4 pre

    Hello,

    I bought a very cheap ( 100€ ), Focusrite Liquid 4 pre, because the only issue that it have is a problem with "hum" in all the channels. So, I think this is easy to fix. So today arrived the unit, and when I power up I hear a relay open and closes continuously. Something goes wrong... I open the unit and... uauuuu.

    1 surprise .- Something try to fix? Because I see a nonsense with the voltage regulators ( that dosen't work ).
    7812
    7805
    7905
    lm317 !?!?! what?!?!

    2 surprise .- When I tuned the PCB downside, I see a nonsense... Seems that someone give parts and start to solder everything and everywhere. COMPLETE DISASTER!!

    So, I need a service manual, schematic, some photos of the voltage regulators... everything... I will try to fix it.

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