Xamp3K
May 2016
12
Amate Audio
keep the amplifier working safely without undesirable stops. In case the temperature
keeps rising, the corresponding protection circuit will cause a stop during a certain
time according to the seriousness of the anomaly detected. The PROTECTION and
LIMITER leds will light on at the same time, and the output of the affected channel(s)
will be disconnected.
In LOW channel, before the amplifier completely stops because of temperature
problems, it will reduce the output level by 6dB approximately. Once the temperature
reduces to normal parameters, the normal output level will be re-established.
Short circuit
In case of very low impedance or short circuit in any loudspeaker output, the
LIMITER led is activated and a significant descent of the output level of the affected
channel will be observed (loss of volume, but keeps working)
Direct Current
In the case that due to some malfunction the power module tries to deliver direct
current (DC) at the output, the protection circuit will immediately disconnect the
module to avoid damage to the loudspeakers. In that case, the PROTECTION and
LIMITER leds will light on at the same time and the output will be disconnected
Other causes that could prevent the normal work of the amplifier can also activate
the PROTECTION. Under those circumstances, the installation has to be revised
according to the basic principles described below:
•
Disconnect all the connected peripheral equipment (sources, pre-amplifiers,
and loudspeakers). Leave the amplifier “alone” and verify if the anomaly
disappears or if it remains in only one channel or both.
•
Temperature: Cooling (possible air obstruction. Check if the fans are working
and make an internal cleaning).
•
Short circuit: Check the state of the loudspeaker line (possible short circuit,
disconnect and check if the anomaly disappears).
•
C.C. at the output (DC): Possible serious breakdown. Contact an authorized
technical service.
In all cases it is recommended to go through all previous checkpoints before
contacting the authorized technical service and reporting the observed problem.
Summary of Contents for Xamp3K
Page 27: ......