UST for iR2520

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Hello!
I have an iR2520.
Main: WLaa-66-02
Main2: Boot-v0062
Econt: 904
I don't use secured print. Secured Print Settings are not available in the menu.
Please tell me where to get UST for iR2520(Boot, Main, Dcon)?
fitisov1990@gmail.com
Thanks a lot!