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Adding memory to a Lexicon PCM-80... myself?

Discussion in 'Pro Audio Equipment' started by redrabbit, Feb 15, 2005.

  1. redrabbit

    redrabbit Active Member


    I've searched , and cannot find the process to expand the memory to this unit. The manual tells me what exact kind of SIMM modules are needed, and then says:

    Has anyone done this....or can you direct me to a service tech in the Los Angeles area...?
    I'm pretty sure I can replace or add some chips/modules myself......I'm an antistatic kinda guy. 8)

  2. redrabbit

    redrabbit Active Member


    Hints from the Lexicon Kowledge Base tell me:

    *I need to use "true parity" chips (it's rare if they're not)....
    *They need to be installed in matching pairs...
    *And , move a jumper from "256k to EXT".

    ...that info seems to have been provided because of problems arising from when people try it themselves , without any instructions from Lexicon...... Makes me wonder if NOT telling us how to do it - is creating just as many issues as TELLING us how. :?
    Any experienced upgraders out there?

  3. redrabbit

    redrabbit Active Member

    I started this one, so I'll end it, for archive's sake.

    A tech told me the hardest thing is finding those 4meg 9bit SIMM (x2)modules. I'm getting them at :


    The rest is how I said above. Once the unit is open, unscrew the second inversed board, pull straight up, you'll see two empty slots. Insert modules. Near those is the jumper that needs changing. Be static free!!.
    Replace board and cover and power up.
    If you don't see me post back here in a week, everything worked ok.

  4. redrabbit

    redrabbit Active Member

    Installed them (1 pair) last night, moved the jumper, and it works !

    Note: The SIMMs go in at an angle, with the notch on the correct side. Make sure they snap/lock in-place.


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