EM Acoustics AQ-10 switchmode amplifier - Manual (Page 15)

AQ-10 Operating Instructions
Page 15
www.emacoustics.co.uk
Typical conditions that could cause the protection to be triggered include very high frequency
or subsonic input signals, DC in the inputs, short-circuited outputs, or internal high
temperatures.
The protection circuit can affect all channels or a ‘channel pair’ depending on the type of
fault. This is indicated by the combination of A/P LED and OCM LED illuminating. In this way
it is possible for two channels (a channel pair) to remain functioning even though a fault has
caused the other channel pair to mute. A channel pair would be A+B or C+ D.
Temperature related faults will reset if the unit has cooled sufficiently.
Output short circuits will require manual reset after clearing the fault. Short circuits on either
channel of a channel pair will only affect that channel pair. A/P will illuminate together with
the OCM LED on the shorted channel and the partner channel of the channel pair (so A+B or
C+D).
Operating Your Amplifier: Notes and Switching On
Read all documentation before operating your equipment and retain all documentation for
future reference.
Do not spill water or other liquids into or on the unit and do not operate the unit while
standing in liquid.
Do not block fan intake or rear ventilation outlets or operate the unit in an environment that
could impede the free flow of air around the unit.
If the unit is used in an extremely dusty or smoky environment, it should be cleaned of any
collected debris at regular intervals. Please also see the notes regarding maintenance on page
17.
It is important that the power output of your amplifier is matched to the power handling
capacity of your loudspeaker. If not, damage to the loudspeaker could occur.
Switching On…
At ‘switch-on’ the protection circuit will initially activate whilst the circuits stabilise, indicated
by the red A/P LED illuminating, in addition to various other LEDs. After a few seconds the
red A/P LED will extinguish indicating a satisfactory working condition.
Other LEDs may remain illuminated depending upon rear panel switch settings and input
connections. If the A/P LED does not extinguish after 5 seconds the unit may be faulty or
some external connections may be incorrect or inappropriate. If this occurs you should power
down the unit and remove all external connections (except for the mains power supply) and
repeat the power up sequence. If the problem persists please contact us – details on page
17.