10
Nagra -
Pyramid Monoblock Amplifier
Operating the PMA
Proceed only once you have completed the installation steps described
in the previous chapter
Installation
.
(a) Mains switch (b) Operating switch “ON” LED
Power switches
The PMA offers two different power switches. The Mains switch (a),
feeds the whole unit. When in
O
position, the unit is OFF and isolated
from the mains, its power consumption is zero. In the
I
position, it
allows the operating switch (b) to control the unit.
The Operating Switch (b) has 3 positions:
ON
-
AUTO
–
OFF
ON
The unit turns ON after a short heating and self-control
period
AUTO
The PMA turns ON and OFF automatically in the
presence of an audio signal on the inputs
OFF
Standby position
Mains
switch (a)
Operating
switch (b)
Action
O Any
The unit is completely OFF
I ON
Turn the amplifier ON*
I AUTO
Automatic mode
I OFF
Keeps the unit in STANDBY position
*The green LED on the back panel will light only when the unit is ON
