20
Front panel controls
All the important functions of the
A 3000 HV
can be controlled using the sensor buttons on the front panel.
All information pertaining to the machine’s status is displayed by symbols. The following explains in greater detail the
functions of the front panel buttons and the meaning of the symbols.
On / Off switch
Touching the
button briefly switches the device on / off.
When the machine is initially switched on, a certain amount of time elapses
before all the amplifier stages reach their optimum working point. During this
period the speaker buttons flash (power-on delay). As soon as the machine is
ready for use, it switches speaker outputs A and B to their previous status, i.e.
their status when the amplifier was last switched off.
The
button remains dimly lit even in stand-by mode, to indicate that the
A 3000 HV
is ready for use.
Caution!
The mains button is not an isolation switch. Certain parts of the machine remain
connected to mains voltage even when the screen is switched off and dark. If you
know you will not be using the machine for a long period, we recommend that you
disconnect it from the mains by withdrawing the mains plug from the wall socket.
Please see the chapter entitled
'Notes on Energy Saving'
for details of power
consumption.
Operating buttons
The current switched state of the buttons is indicated by the button lighting: if a
button is brightly lit, then that function is active (e.g. loudspeaker output A
switched on). If the button is only dimly lit, that function is inactive.
A brief touch
switches loudspeaker output ‘A’ on and off.
A brief touch
switches loudspeaker output ‘B’ on and off.
