Arcam P777 - Manual (Page 10)

E-8
operation
Front panel control
The front panel has a single control: a centrally located
power on/off button.
PoWER
Switches the unit on and off. Note that the modules are
turned on individually to stagger the surge created when
a powerful amplifier is switched on (i.e., it provides a
‘soft start’). This reduces the surge current drawn from
the domestic power supply.
Status LEds
A separate LED indicates the status of each of the seven
channels of the P777.
The LEDs cycle through red, orange, then green to
indicate the status from powered-up (initialised),
stabilised and active respectively.
All LEDs are off in standby mode.
operating procedure
Once the relevant connections have been made, the
P777 can be switched on using the central button on the
front panel.
Switching on
It is recommended that you switch on your pre-amplifier
or controller before powering up the power amplifier.
Normal powering up is indicated by the following
sequence of front panel LED indicators:
1. On pressing the power switch, all LEDs turn red.
2. After a short delay (about half-a-second), the
centre LED turns amber.
3. The LEDs continue turning amber from the
centre to the edges in pairs, at about one second
intervals.
4. The centre LED turns green and a relay ‘click’ is
heard.
5. The LEDs continue turning green from the centre
to the edges in pairs, along with relay ‘clicks’, at
about one second intervals.
In the unlikely event that the LEDs do not follow this
sequence when the unit is powered up, or they behave
abnormally at any time during use, then refer to the
‘Fault status indicators’ table on page 10 to discover why
the amplifier is in protection mode.
Switching off
To shut down, switch the power amplifier off first,
followed by the pre-amplifier or controller.
This eliminates the chance of any ‘thumps’ or power
spikes being fed through to the power amplifier and
potentially causing damage to the system.
MULTICHANNEL POWER AMPLIFIER
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