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Lexicon LXP-5 - worth the effort???

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  • Lexicon LXP-5 - worth the effort???

    Folks,

    When I left the position of Senior Tech at Buddy Rogers Music in Cinty (great guys) they let me have a pile of parts/equipment/stuff/old guitars that had been accumulating for years and years (literally truckloads). Most was of limited use and has been passed onto younger techs who are still building their "first junk pile." But among the "this may have potential" was a Lexicon LXP-5 unit that had been there long enough that no one even remembered what was wrong with it. So I snagged it - if for nothing else a nice project box.
    Now recently I've done some research on the unit and some folks out there rave about it so I like to attempt to fix it. But I have no service info of any sorts and this beast resembles the guts of a PC more than anything musical.

    Symptom: Pilot lite comes on and there is a hissing/roaring noise in both outputs. That might not be too awfully bad - perhaps an outut buffer or such but, again, I've no information other than the 80 "user's manual" that I downloaded.

    Any suggestions where to proceed? And source of service information? Anyone have one of these who would be willing to make a reference measurement for me from time to time? Or anyone with one of these who might be interested in picking up a "parts" unit - all I'm really looking for is a delay, not machine smarter than me (hey, it's got at least 2 CPUs - perhaps another but I don't recogize the number).

    Thanks for all the help

    Rob

  • #2
    I have one of these units that seemed to be in a similar state to yours. It sat in my junk pile for about 2 years. The symptom was simply that as soon as I cracked the output volume to where any signal would go out, it was nothing but a huge, whooshing sound. It did the same whether or not I had anything plugged into the input and I believe that it didn't matter where the mix knob was set.

    I noticed that whenever I turned the input knob, the overload LED would light up for a few seconds, then go off.

    The fix was simply to clean out the pots with DeOxit until I was no longer getting the flashing overload LED when the input knob was turned.

    2 years of sitting under my bench and all it took was 5 minutes worth of cleaning.

    I also have the instructions for a factory reset if you need them.

    Greg

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    • #3
      Lexicon LXP-5

      Does anyone have instructions for "hard reset" for this unit?

      It passes dry signal but no effects like it has lost presets or chips failed.

      Battery on circuit board is OK

      Tried removing and replacing it, no good, but have since heard that leaving it out for "5 hours" is required so will try that.

      Also see otheres have fixed these by cleaning pots, they feel smooth but worth a try anyway.

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      • #4
        I know these threads are a couple years old .. I would like to rejuvenate my LXP-5--
        does it need a battery?
        are there downloads to reinstall the factory patches?
        I have the MRC for it.. would that help?

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        • #5
          Originally posted by moxy View Post
          I know these threads are a couple years old .. I would like to rejuvenate my LXP-5--
          does it need a battery?
          are there downloads to reinstall the factory patches?
          I have the MRC for it.. would that help?

          Hi Rob,

          Here is the LXP5 service manual.

          Good luck.
          Attached Files

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          • #6
            LXP-5

            G'day
            Have forgotten some of the details, the backup battery will need to be checked, i think it may require some basic soldering skills.
            The unit i had was pronounced dead, main chip had failed and little chance of finding another, can't remember exactly how the factory software is re-installed, have a feeling it's all in the chip and if that's gone there is little that can be done.
            I see someone has provided a manual, they are a great sounding thing so worth a try, good luck.
            Rob

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            • #7
              Thanx to all .. this baby is humming, and soon with the MRC it'll be 1995 all over again for me

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