TA Triumph-Adler DCC 6526L - Manual (Page 415)

Default Setting (System Menu)
8-170
5 Press the  or  key to select [USB Device].
6 Press the OK key. USB Device appears.
7 Press the  or  key to select [Unblock] or
[Block].
8 Press the OK key. Completed. is displayed and the
screen returns to the System menu.
USB Device:
a b
*********************
2 Block 1 *Unblock