Electro-voice RE-2 N/D 767A мануал!!!

[tamalex]

Сообщение от stalyngrad

и английский в PDF

Все там нормально написано на странице 4 (пункты 6 и 7):

6. Power Lock Out - Press SET, UP, and DOWN at the same
time and hold 3 sec onds to lock the power switch on. To
turn the unit off, place the power switch in the OFF po si -
tion and push SET, UP, or DOWN. To re move the lock,
press SET, UP, and DOWN again at the same time and
hold 3 sec onds. A one-time only ON-LOCK mode can also
be en tered by quickly cy cling the power switch three
times.
7. Set Key Lock-Out, by press ing and hold ing the UP and
DOWN ar row keys to gether for 3 sec onds, the SET key is
dis abled. To re ac ti vate the SET key sim ply press and hold
the UP and DOWN keys again for 3 sec onds.

Думаю, что должно быть понятно - удерживать нажатой кнопку не менее 3 секунд.