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How to tell if a Roland AT90S has been upgraded to a 90SL?

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  • How to tell if a Roland AT90S has been upgraded to a 90SL?

    Got a seller advertising a Roland AT90SL for sale. However his pictures show an AT90S. Can the 90S be upgraded to an SL and if so, how can one tell?
    ------------------------------------------------------------------------
    Current: Yamaha EL400, Yamaha C60

    Past: Technics GA3, Technics F100, Technics FA-1

  • #2
    Part of the upgrade kit was a large plastic badge that covered the original silk screened AT90S logo, reading AT90S Luxury (there was even a plastic tool with the kit that allowed the badge to be positioned precisely!). And there was also a small sticker that went next to the bottom right rhythm button, saying 'User'. As the upgrades were almost always professionally installed by a service engineer, I can't imagine that those two things wouldn't have been put in place. Plus, the organ's screen should show AT90SL on start-up as the operating system was also upgraded. Inside the organ near the left hand end, viewed from the rear, are the two vertically mounted daughter boards that made up the 'important' bit of the upgrade.

    One thing rings an alarm bell, apart from the photos showing an AT90S. The upgrade kit was not available in all countries and I'm pretty sure that there is some discussion here on the forum about it not being available in the USA. I'd ask for some solid evidence that it's an AT90SL - the difference between the S and SL is major!
    It's not what you play. It's not how you play. It's the fact that you're playing that counts.

    New website now live - www.andrew-gilbert.com

    Current instruments: Roland Atelier AT900 Platinum Edition, Yamaha Genos, Yamaha PSR-S970, Kawai K1m
    Retired Organs: Lots! Kawai SR6 x 2, Hammond L122, T402, T500 x 2, X5. Conn Martinique and 652. Gulbransen 2102 Pacemaker. Kimball Temptation.
    Retired Leslies, 147, 145 x 2, 760 x 2, 710, 415 x 2.
    Retired synths: Korg 700, Roland SH1000, Jen Superstringer, Kawai S100F, Kawai S100P, Kawai K1

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