Home › Forums › Vintage EHX › Memory Man Deluxe Problem

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  • June 28, 2016 at 1:33 am #84463
    dbisgounis5
    Participant

    I have this pedal and it just recently stopped working. When I engage the pedal the light still comes on but there is absolutely no delay anymore. The overload light still even comes on when I play loudly. I am using the EHX 24v adaptor. Has this happened to anyone or can anyone tell me what may have happened?

    June 28, 2016 at 4:44 pm #121678
    Scruffie
    Member

    Could be any number of things, going to need a bit more information first.

    Do you get a bypass signal? When the pedal is on, if you turn the blend pot to the full dry signal do you get your guitar signal and does the level pot have any effect on it?

    Also do you have a multimeter and any debugging/soldering experience? If not you’ll probably have to either learn or send it to a tech.

    June 29, 2016 at 11:23 pm #121697
    dbisgounis5
    Participant
    Quote:
    Could be any number of things, going to need a bit more information first.

    Do you get a bypass signal? When the pedal is on, if you turn the blend pot to the full dry signal do you get your guitar signal and does the level pot have any effect on it?

    Also do you have a multimeter and any debugging/soldering experience? If not you’ll probably have to either learn or send it to a tech.

    Yes I do get a bypass signal and still get the signal when I turn the blend pot to the full dry signal. Also the level pot still controls the volume of the pedal when bypassed.

    Unfortunately I do not have any soldering experience so I was just wondering if it was worth it to take it to a tech or just get a new delay pedal.

    June 29, 2016 at 11:39 pm #121698
    Scruffie
    Member

    Certainly worth going to a tech with, it’s probably something fairly simple to fix like a dead chip (most assume the worst and that it’s the delay chips that are dead as they are the most expensive part but this is not usually the case) or bad solder joint. Catastrophic failure where you’d consider replacing it is usually reserved for water damage or incorrect power supplies.

    If you buy a cheap multimeter you can test the voltages quite easily and I might be able to tell you what’s wrong just from that.

    December 21, 2016 at 5:59 pm #122378
    Tapster
    Member

    I have a 1977/8, 5-knob Deluxe Memory Man which isn’t working. It was last working two years ago and we’ve moved to Thailand since, so it might have had a rough trip!

    I don’t speak any Thai so there’s virtually no chance of getting it fixed here.

    Honestly, I can’t tell which position of the footswitch is “on” but there’s no response from any of the effects knobs with the footswitch on or off.

    Neither of the lights comes on at any time.

    The Blend knob doesn’t do anything.

    With the footswitch on or off, indeed with the unit on or off, the Level knob controls the volume and (weirdly) turning it anticlockwise increases the volume.

    Can you give me any advice, please, on where to go from here. I can test voltages and, if necessary take the board out and send it to anywhere in the “West” to get it investigated and hopefully, fixed.

    PS

    For anyone who knows everything about this unit, mine doesn’t have the cylindrical knobs as shown in the attached photo. It has narrower knobs with pointers on them. It was bought in England and has a 3-core cable, 240v AC

    December 27, 2016 at 1:48 pm #122402
    Scruffie
    Member

    Okay well Thailand’s main supply is 220V so being a 240V model that should be okay but first things first is to confirm voltage is actually getting to the pedal from the transformer seeing as you’re not getting light from the power indicator.

    The transformer will have 3 wires coming from it to the board so set your DMM to AC put the black probe to the enclosure or other suitable ground point and check the 2 outer wires of the transformer that connect to the PCB with the red lead.

    Assuming that checks out, then set the meter to DC and check the 3 pins of the power transistor inside (should have a metal tab on it and read 2N6111) and post the voltages you get.

    December 29, 2016 at 3:48 pm #122412
    Tapster
    Member

    Thanks Scruffie

    I’ll get on with all that voltage measuring after the festivities are over.

    I’ll be back in touch after NYE!

    Cheers

    January 19, 2017 at 6:56 am #122519
    Tapster
    Member

    After much searching, I have decided to send my DMM to a specialist in London who has worked with them and other vintage effects pedals before.

    I have to be honest, I know nothing about printed circuit boards and the chances of my being able to fix this unit are very small!.

    Also, I’ve asked the guy in London to try to convert it from mains voltage (240V UK, in this case) to a 9V or 18V supply so that it will be much easier to fit on my pedal board.

    Thanks for the helpful posts on this thread.

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