TallyGenicom 3860 Guía De Referencia Rápida página 39

When attempting to enter the printed menu, the display switches to "Prog :ENTR
CODE."
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Menu lockout has been set. Enter the correct code, or as a last resort,
initialize the printer. See "Lock the Printed Menu", Chapter 5 in the
3860/80 User's Manual.
GEK-01054