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  • July 24, 2016 at 8:58 am #84503
    kenneth.daniels@snet.net
    Member

    I found an old Echo 600 in my basement. Does not appear to work. Does anyone here have any info on this unit, particulatly schematic to try and troubleshoot.

    Thanks,
    KD

    July 24, 2016 at 9:10 am #121753
    Scruffie
    Member

    Oh wow, that’s a lucky find! I have some limited information on it which sadly doesn’t include the schematic but I think I can help you anyway :)

    Do you have a multi-meter and know how to use it first of all?

    July 24, 2016 at 9:23 am #121755
    kenneth.daniels@snet.net
    Member

    Good to hear.

    Regarding the multi-meter. Yes I have an electrical engineering background and am versed reading schematics and using test equipment.

    Actually been refurbishing tube amps as a hobby.

    What do you recommend?

    July 24, 2016 at 10:32 am #121756
    Scruffie
    Member

    Great, well first things first will be to check power is going to the circuit, should be a 78L15 regulator on the board, test that it has about 20-25V going in and 15V coming out.

    Assuming that checks out then simply read the voltages of all the ICs and post them up.

    July 29, 2016 at 11:41 am #121775
    kenneth.daniels@snet.net
    Member

    Hi All,

    Plugged unit in this morning, and power supply looks good. Power and Input LED’s are operational and Clean signal is output to amp, however when I step on effects switch, guitar signal is somewhat lower in volume and the effects don’t seem to work, and BLEND/OUTPUT sliders don’t seem to do much.

    I did not check each IC voltage, should I? Any other thoughts on DEBUG from here.

    Thanks All,

    KD

    July 29, 2016 at 11:54 am #121776
    Scruffie
    Member

    Hey,

    Power is a good start but I can’t tell you anything without some voltages, the volume drop might be normal but it might not.

    The fact the blend and output sliders don’t have an effect doesn’t bode too well though.

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